protected void ResetCancelToken(string actionName, OperationCanceledException e)
{
ResultConsole.AddConsoleLine($"Operation {actionName} canceled.");
Logger.LogMessage($"Operation {actionName} canceled by user request. {e.Message}");
ResetCancelToken();
}
public void TypePropertiesAreCorrect()
{
Assert.AreEqual(typeof(OperationCanceledException).GetClassName(), "Bridge.OperationCanceledException", "Name");
object d = new OperationCanceledException();
Assert.True(d is OperationCanceledException, "is OperationCanceledException");
Assert.True(d is Exception, "is Exception");
}
public void SetNext() {
var r = new DiscardRedundantWorkThrottle();
var ax = new ArgumentException();
var cx = new OperationCanceledException();
// results are propagated
var n = 0;
r.SetNextToAction(() => n++).AssertRanToCompletion();
n.AssertEquals(1);
r.SetNextToFunction(() => 2).AssertRanToCompletion().AssertEquals(2);
r.SetNextToAsyncFunction(Tasks.RanToCompletion).AssertRanToCompletion();
r.SetNextToAsyncFunction(() => Task.FromResult(3)).AssertRanToCompletion().AssertEquals(3);
// faulted tasks are propagated
r.SetNextToAsyncFunction(() => Tasks.Faulted(ax)).AssertFailed<ArgumentException>();
r.SetNextToAsyncFunction(() => Tasks.Faulted<int>(ax)).AssertFailed<ArgumentException>();
// cancelled tasks are propagated
r.SetNextToAsyncFunction(Tasks.Cancelled).AssertCancelled();
r.SetNextToAsyncFunction(Tasks.Cancelled<int>).AssertCancelled();
// thrown cancellation exceptions indicate cancellation
r.SetNextToAsyncFunction(() => { throw cx; }).AssertCancelled();
r.SetNextToAsyncFunction<int>(() => { throw cx; }).AssertCancelled();
r.SetNextToAction(() => { throw cx; }).AssertCancelled();
r.SetNextToFunction<int>(() => { throw cx; }).AssertCancelled();
// thrown exceptions are propagated
r.SetNextToAsyncFunction(() => { throw ax; }).AssertFailed<ArgumentException>();
r.SetNextToAsyncFunction<int>(() => { throw ax; }).AssertFailed<ArgumentException>();
r.SetNextToAction(() => { throw ax; }).AssertFailed<ArgumentException>();
r.SetNextToFunction<int>(() => { throw ax; }).AssertFailed<ArgumentException>();
}
public void MessageOnlyConstructorWorks()
{
var ex = new OperationCanceledException("Some message");
Assert.True((object)ex is OperationCanceledException, "is OperationCanceledException");
Assert.AreEqual(ex.Message, "Some message", "Message");
Assert.True(ReferenceEquals(ex.CancellationToken, CancellationToken.None), "CancellationToken");
Assert.Null(ex.InnerException, "InnerException");
}
public void CancellationTokenOnlyConstructorWorks()
{
var ct = new CancellationToken();
var ex = new OperationCanceledException(ct);
Assert.True((object)ex is OperationCanceledException, "is OperationCanceledException");
Assert.AreEqual(ex.Message, "Operation was canceled.", "Message");
Assert.True(ReferenceEquals(ex.CancellationToken, ct), "CancellationToken");
Assert.Null(ex.InnerException, "InnerException");
}
private static void HandleCanceledOperations(CancellationToken cancellationToken, TaskCompletionSource<HttpResponseMessage> tcs, OperationCanceledException e)
{
if (cancellationToken.IsCancellationRequested && e.CancellationToken == cancellationToken) {
tcs.TrySetCanceled();
}
else {
tcs.TrySetException(e);
}
}
public void MessageAndInnerExceptionAndCancellationTokenConstructorWorks()
{
var ct = new CancellationToken();
var innerException = new Exception();
var ex = new OperationCanceledException("Some message", innerException, ct);
Assert.True((object)ex is OperationCanceledException, "is OperationCanceledException");
Assert.AreEqual(ex.Message, "Some message", "Message");
Assert.True(ReferenceEquals(ex.CancellationToken, ct), "CancellationToken");
Assert.True(ReferenceEquals(ex.InnerException, innerException), "InnerException");
}
public static void BasicConstructors()
{
CancellationToken ct1 = new CancellationTokenSource().Token;
OperationCanceledException ex1 = new OperationCanceledException(ct1);
Assert.Equal(ct1, ex1.CancellationToken);
CancellationToken ct2 = new CancellationTokenSource().Token;
OperationCanceledException ex2 = new OperationCanceledException("message", ct2);
Assert.Equal(ct2, ex2.CancellationToken);
CancellationToken ct3 = new CancellationTokenSource().Token;
OperationCanceledException ex3 = new OperationCanceledException("message", new Exception("inner"), ct3);
Assert.Equal(ct3, ex3.CancellationToken);
}
public static bool OperationCanceledException_Basics()
{
TestHarness.TestLog("* OperationCanceledExceptionTests.OperationCanceledException_Basics()");
bool passed = true;
#if !PFX_LEGACY_3_5
CancellationToken ct1 = new CancellationTokenSource().Token;
OperationCanceledException ex1 = new OperationCanceledException(ct1);
passed &= TestHarnessAssert.AreEqual(ct1, OCEHelper.ExtractCT(ex1), "The exception should have the CancellationToken baked in.");
CancellationToken ct2 = new CancellationTokenSource().Token;
OperationCanceledException ex2 = new OperationCanceledException("message", ct2);
passed &= TestHarnessAssert.AreEqual(ct2, OCEHelper.ExtractCT(ex2), "The exception should have the CancellationToken baked in.");
CancellationToken ct3 = new CancellationTokenSource().Token;
OperationCanceledException ex3 = new OperationCanceledException("message", new Exception("inner"), ct3);
passed &= TestHarnessAssert.AreEqual(ct3, OCEHelper.ExtractCT(ex3), "The exception should have the CancellationToken baked in.");
#endif
return passed;
}
private bool NotOurShutdownToken(OperationCanceledException oce)
{
return(oce.CancellationToken == _shutdownToken);
}
public void SetException(Exception exception)
{
_canceledException = exception as OperationCanceledException;
}
/// <summary>
/// Initializes a new instance of the <see cref="SpotifyHttpClientTimeoutException" /> class.
/// </summary>
/// <param name="clientType">The client type.</param>
/// <param name="innerException">
/// The exception that is the cause of the current exception, or a null reference (Nothing in Visual Basic) if no inner exception is specified.
/// </param>
public SpotifyHttpClientTimeoutException(Type clientType, OperationCanceledException innerException)
: base("The operation has been canceled due to the HttpClient timeout. See inner exception for details.", clientType, innerException)
{
}
/// <summary>
/// Throws the cancellation exception.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="exception">The exception.</param>
/// <returns>Exception.</returns>
private Exception GetCancellationException(string url, CancellationToken cancellationToken, OperationCanceledException exception)
{
// If the HttpClient's timeout is reached, it will cancel the Task internally
if (!cancellationToken.IsCancellationRequested)
{
var msg = string.Format("Connection to {0} timed out", url);
_logger.Error(msg);
// Throw an HttpException so that the caller doesn't think it was cancelled by user code
return(new HttpException(msg, exception)
{
IsTimedOut = true
});
}
return(exception);
}
public static void AsyncTaskAwaiterTests_CTandOCE()
{
// Test that CancellationToken is correctly flowed through await
{
var amb = AsyncTaskMethodBuilder.Create();
var cts = new CancellationTokenSource();
var oce = new OperationCanceledException(cts.Token);
amb.SetException(oce);
try
{
amb.Task.GetAwaiter().GetResult();
Assert.True(false, string.Format(" > FAILURE. Faulted task's GetResult should have thrown."));
}
catch (OperationCanceledException oceToCheck)
{
Assert.True(oceToCheck.CancellationToken == cts.Token, " > FAILURE. The tasks token should have equaled the provided token.");
}
catch (Exception exc)
{
Assert.True(false, string.Format(" > FAILURE. Exception an OCE rather than a " + exc.GetType()));
}
}
// Test that original OCE is propagated through await
{
var tasks = new List<Task>();
var cts = new CancellationTokenSource();
var oce = new OperationCanceledException(cts.Token);
// A Task that throws an exception to cancel
var b = new Barrier(2);
Task<int> t2 = Task<int>.Factory.StartNew(() =>
{
b.SignalAndWait();
b.SignalAndWait();
throw oce;
}, cts.Token);
Task t1 = t2;
b.SignalAndWait(); // make sure task is started before we cancel
cts.Cancel();
b.SignalAndWait(); // release task to complete
tasks.Add(t2);
// A WhenAll Task
tasks.Add(Task.WhenAll(t1));
tasks.Add(Task.WhenAll(t1, Task.FromResult(42)));
tasks.Add(Task.WhenAll(Task.FromResult(42), t1));
tasks.Add(Task.WhenAll(t1, t1, t1));
// A WhenAll Task<int[]>
tasks.Add(Task.WhenAll(t2));
tasks.Add(Task.WhenAll(t2, Task.FromResult(42)));
tasks.Add(Task.WhenAll(Task.FromResult(42), t2));
tasks.Add(Task.WhenAll(t2, t2, t2));
// A Task.Run Task and Task<int>
tasks.Add(Task.Run(() => t1));
tasks.Add(Task.Run(() => t2));
// A FromAsync Task and Task<int>
tasks.Add(Task.Factory.FromAsync(t1, new Action<IAsyncResult>(ar => { throw oce; })));
tasks.Add(Task<int>.Factory.FromAsync(t2, new Func<IAsyncResult, int>(ar => { throw oce; })));
// Test each kind of task
foreach (var task in tasks)
{
((IAsyncResult)task).AsyncWaitHandle.WaitOne();
try
{
if (task is Task<int>)
{
((Task<int>)task).GetAwaiter().GetResult();
}
else if (task is Task<int[]>)
{
((Task<int[]>)task).GetAwaiter().GetResult();
}
else
{
task.GetAwaiter().GetResult();
}
Assert.True(false, " > FAILURE. Expected an OCE to be thrown.");
}
catch (Exception exc)
{
Assert.True(
Object.ReferenceEquals(oce, exc),
" > FAILURE. The thrown exception was not the original instance.");
}
}
}
}
private bool NotOurShutdownToken(OperationCanceledException oce)
{
return oce.CancellationToken == _shutdownToken;
}
static void Main()
{
WebDataDownloader downloader = new WebDataDownloader();
string[] addresses = { "http://www.msnbc.com", "http://www.yahoo.com",
"http://www.nytimes.com", "http://www.washingtonpost.com",
"http://www.latimes.com", "http://www.newsday.com" };
CancellationTokenSource cts = new CancellationTokenSource();
// Create a UI thread from which to cancel the entire operation
Task.Factory.StartNew(() =>
{
Console.WriteLine("Press c to cancel");
if (Console.ReadKey().KeyChar == 'c')
{
cts.Cancel();
}
});
// Using a neutral search term that is sure to get some hits.
Task <string[]> webTask = downloader.GetWordCounts(addresses, "the", cts.Token);
// Do some other work here unless the method has already completed.
if (!webTask.IsCompleted)
{
// Simulate some work.
Thread.SpinWait(5000000);
}
string[] results = null;
try
{
results = webTask.Result;
}
catch (AggregateException e)
{
foreach (var ex in e.InnerExceptions)
{
OperationCanceledException oce = ex as OperationCanceledException;
if (oce != null)
{
if (oce.CancellationToken == cts.Token)
{
Console.WriteLine("Operation canceled by user.");
}
}
else
{
Console.WriteLine(ex.Message);
}
}
}
finally
{
cts.Dispose();
}
if (results != null)
{
foreach (var item in results)
{
Console.WriteLine(item);
}
}
Console.ReadKey();
}
public override void DidCompleteWithError (NSUrlSession session, NSUrlSessionTask task, NSError error)
{
var data = getResponseForTask(task);
data.IsCompleted = true;
if (error != null) {
var ex = default(Exception);
if (error.Description.StartsWith("cancel", StringComparison.OrdinalIgnoreCase)) {
ex = new OperationCanceledException();
} else {
ex = new WebException(error.LocalizedDescription);
}
data.FutureResponse.TrySetException(ex);
data.ResponseBody.SetException(ex);
return;
}
data.ResponseBody.Complete();
lock (This.inflightRequests) {
This.inflightRequests.Remove(task);
}
}
public Exception HandleCancellation(OperationCanceledException exception)
{
// TODO
throw new NotImplementedException("need to implement how cancellation is handled");
}
/// <summary>
/// Executes the operation asynchronously.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation that handles processing the result of the command.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">User supplied state.</param>
/// <returns>
/// Task.
/// </returns>
/// <exception cref="ArgumentNullException">
/// executionToken;executionToken is null.
/// or
/// implementation;implementation is null.
/// </exception>
protected override async Task <int?> ExecuteAsync(CommandExecutionToken <NpgsqlCommand, NpgsqlParameter> executionToken, CommandImplementationAsync <NpgsqlCommand> implementation, CancellationToken cancellationToken, object state)
{
if (executionToken == null)
{
throw new ArgumentNullException("executionToken", "executionToken is null.");
}
if (implementation == null)
{
throw new ArgumentNullException("implementation", "implementation is null.");
}
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
try
{
using (var cmd = new NpgsqlCommand())
{
cmd.Connection = m_Connection;
cmd.Transaction = m_Transaction;
if (DefaultCommandTimeout.HasValue)
{
cmd.CommandTimeout = (int)DefaultCommandTimeout.Value.TotalSeconds;
}
cmd.CommandText = executionToken.CommandText;
cmd.CommandType = executionToken.CommandType;
foreach (var param in executionToken.Parameters)
{
cmd.Parameters.Add(param);
}
int?rows;
if (((PostgreSqlCommandExecutionToken)executionToken).DereferenceCursors)
{
rows = await DereferenceCursorsAsync(cmd, implementation).ConfigureAwait(false);
}
else
{
rows = await implementation(cmd).ConfigureAwait(false);
}
executionToken.RaiseCommandExecuted(cmd, rows);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return(rows);
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert Exception into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionCanceled(executionToken, startTime, DateTimeOffset.Now, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
}
public static void AlreadyCanceled(Action <ParallelQuery <int> > query)
{
ParallelQuery <int> s = Enumerables <int> .ThrowOnEnumeration(new ShouldNotBeInvokedException(), 2).AsParallel().WithCancellation(new CancellationToken(canceled: true));
OperationCanceledException oce = Assert.Throws <OperationCanceledException>(() => query(s));
}
public void TryCancel(OperationCanceledException exception)
{
_createRequestTcs.TrySetCanceled(exception);
_responseTcs.TrySetCanceled(exception);
}
protected virtual void OperationCanceled(OperationCanceledException ex)
{
WriteLine("Operation was canceled.", Verbosity.Quiet);
}
public static void RunAsyncAdditionalBehaviorsTests_NegativeCases2()
{
// Running tasks with exceptions.
{
var twa1 = Task.Run(() => { throw new Exception("uh oh"); });
var twa2 = Task.Factory.StartNew(() => { throw new Exception("uh oh"); });
var tasks = new Task[]
{
Task.Run(() => { throw new Exception("uh oh"); }),
Task.Factory.StartNew<int>(() => { throw new Exception("uh oh"); }),
Task.WhenAll(Task.Run(() => { throw new Exception("uh oh"); }), Task.Run(() => { throw new Exception("uh oh"); })),
Task.WhenAll<int>(Task.Run(new Func<int>(() => { throw new Exception("uh oh"); })), Task.Run(new Func<int>(() => { throw new Exception("uh oh"); }))),
Task.WhenAny(twa1, twa2).Unwrap(),
Task.WhenAny<int>(Task.Run(new Func<Task<int>>(() => { throw new Exception("uh oh"); }))).Unwrap(),
Task.Factory.StartNew(() => Task.Factory.StartNew(() => { throw new Exception("uh oh"); })).Unwrap(),
Task.Factory.StartNew<Task<int>>(() => Task.Factory.StartNew<int>(() => { throw new Exception("uh oh"); })).Unwrap(),
Task.Run(() => Task.Run(() => { throw new Exception("uh oh"); })),
Task.Run(() => Task.Run(new Func<int>(() => { throw new Exception("uh oh"); }))),
Task.Run(new Func<Task>(() => { throw new Exception("uh oh"); })),
Task.Run(new Func<Task<int>>(() => { throw new Exception("uh oh"); }))
};
for (int i = 0; i < tasks.Length; i++)
{
var task = tasks[i];
Assert.True(ValidateFaultedTask(task), " > FAILURE. Task " + i + " didn't fault with the right stack trace.");
}
((IAsyncResult)twa1).AsyncWaitHandle.WaitOne();
((IAsyncResult)twa2).AsyncWaitHandle.WaitOne();
Exception ignored = twa1.Exception;
ignored = twa2.Exception;
}
// Test that OCEs don't result in the unobserved event firing
{
var cts = new CancellationTokenSource();
var oce = new OperationCanceledException(cts.Token);
// A Task that throws an exception to cancel
var b = new Barrier(2);
Task t1 = Task.Factory.StartNew(() =>
{
b.SignalAndWait();
b.SignalAndWait();
throw oce;
}, cts.Token);
b.SignalAndWait(); // make sure task is started before we cancel
cts.Cancel();
b.SignalAndWait(); // release task to complete
// This test may be run concurrently with other tests in the suite,
// which can be problematic as TaskScheduler.UnobservedTaskException
// is global state. The handler is carefully written to be non-problematic
// if it happens to be set during the execution of another test that has
// an unobserved exception.
EventHandler<UnobservedTaskExceptionEventArgs> handler =
(s, e) => Assert.DoesNotContain(oce, e.Exception.InnerExceptions);
TaskScheduler.UnobservedTaskException += handler;
((IAsyncResult)t1).AsyncWaitHandle.WaitOne();
t1 = null;
for (int i = 0; i < 10; i++)
{
GC.Collect();
GC.WaitForPendingFinalizers();
}
TaskScheduler.UnobservedTaskException -= handler;
}
}
private bool NotOurShutdownToken(OperationCanceledException oce) => oce.CancellationToken == _shutdownToken;
/// <summary>
/// execute as an asynchronous operation.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">The state.</param>
/// <returns>Task.</returns>
protected override async Task<int?> ExecuteAsync(OperationExecutionToken<SQLiteConnection, SQLiteTransaction> executionToken, OperationImplementationAsync<SQLiteConnection, SQLiteTransaction> implementation, CancellationToken cancellationToken, object state)
{
if (executionToken == null)
throw new ArgumentNullException("executionToken", "executionToken is null.");
if (implementation == null)
throw new ArgumentNullException("implementation", "implementation is null.");
var mode = DisableLocks ? LockType.None : (executionToken as SQLiteOperationExecutionToken)?.LockType ?? LockType.Write;
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
IDisposable lockToken = null;
try
{
switch (mode)
{
case LockType.Read: lockToken = await SyncLock.ReaderLockAsync().ConfigureAwait(false); break;
case LockType.Write: lockToken = await SyncLock.WriterLockAsync().ConfigureAwait(false); break;
}
using (var con = await CreateConnectionAsync(cancellationToken).ConfigureAwait(false))
{
var rows = await implementation(con, null, cancellationToken).ConfigureAwait(false);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return rows;
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert SQLiteException into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex2, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
finally
{
if (lockToken != null)
lockToken.Dispose();
}
}
/// <summary>
/// This does a mapping from hr to the exception and also takes care of making default exception in case of classic COM as COMException.
/// and in winrt and marshal APIs as Exception.
/// </summary>
/// <param name="errorCode"></param>
/// <param name="message"></param>
/// <param name="createCOMException"></param>
/// <returns></returns>
internal static Exception GetMappingExceptionForHR(int errorCode, string message, bool createCOMException, bool hasErrorInfo)
{
if (errorCode >= 0)
{
return(null);
}
Exception exception = null;
bool shouldDisplayHR = false;
switch (errorCode)
{
case __HResults.COR_E_NOTFINITENUMBER: // NotFiniteNumberException
case __HResults.COR_E_ARITHMETIC:
exception = new ArithmeticException();
break;
case __HResults.COR_E_ARGUMENT:
case unchecked ((int)0x800A01C1):
case unchecked ((int)0x800A01C2):
case __HResults.CLR_E_BIND_UNRECOGNIZED_IDENTITY_FORMAT:
exception = new ArgumentException();
if (errorCode != __HResults.COR_E_ARGUMENT)
{
shouldDisplayHR = true;
}
break;
case __HResults.E_BOUNDS:
case __HResults.COR_E_ARGUMENTOUTOFRANGE:
case __HResults.ERROR_NO_UNICODE_TRANSLATION:
exception = new ArgumentOutOfRangeException();
if (errorCode != __HResults.COR_E_ARGUMENTOUTOFRANGE)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_ARRAYTYPEMISMATCH:
exception = new ArrayTypeMismatchException();
break;
case __HResults.COR_E_BADIMAGEFORMAT:
case __HResults.CLDB_E_FILE_OLDVER:
case __HResults.CLDB_E_INDEX_NOTFOUND:
case __HResults.CLDB_E_FILE_CORRUPT:
case __HResults.COR_E_NEWER_RUNTIME:
case __HResults.COR_E_ASSEMBLYEXPECTED:
case __HResults.ERROR_BAD_EXE_FORMAT:
case __HResults.ERROR_EXE_MARKED_INVALID:
case __HResults.CORSEC_E_INVALID_IMAGE_FORMAT:
case __HResults.ERROR_NOACCESS:
case __HResults.ERROR_INVALID_ORDINAL:
case __HResults.ERROR_INVALID_DLL:
case __HResults.ERROR_FILE_CORRUPT:
case __HResults.COR_E_LOADING_REFERENCE_ASSEMBLY:
case __HResults.META_E_BAD_SIGNATURE:
exception = new BadImageFormatException();
// Always show HR for BadImageFormatException
shouldDisplayHR = true;
break;
case __HResults.COR_E_CUSTOMATTRIBUTEFORMAT:
exception = new FormatException();
break; // CustomAttributeFormatException
case __HResults.COR_E_DATAMISALIGNED:
exception = InteropExtensions.CreateDataMisalignedException(message); // TODO: Do we need to add msg here?
break;
case __HResults.COR_E_DIVIDEBYZERO:
case __HResults.CTL_E_DIVISIONBYZERO:
exception = new DivideByZeroException();
if (errorCode != __HResults.COR_E_DIVIDEBYZERO)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_DLLNOTFOUND:
#if ENABLE_WINRT
exception = new DllNotFoundException();
#endif
break;
case __HResults.COR_E_DUPLICATEWAITOBJECT:
exception = new ArgumentException();
break; // DuplicateWaitObjectException
case __HResults.COR_E_ENDOFSTREAM:
case unchecked ((int)0x800A003E):
exception = new System.IO.EndOfStreamException();
if (errorCode != __HResults.COR_E_ENDOFSTREAM)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_TYPEACCESS: // TypeAccessException
case __HResults.COR_E_ENTRYPOINTNOTFOUND:
exception = new TypeLoadException();
break; // EntryPointNotFoundException
case __HResults.COR_E_EXCEPTION:
exception = new Exception();
break;
case __HResults.COR_E_DIRECTORYNOTFOUND:
case __HResults.STG_E_PATHNOTFOUND:
case __HResults.CTL_E_PATHNOTFOUND:
exception = new System.IO.DirectoryNotFoundException();
if (errorCode != __HResults.COR_E_DIRECTORYNOTFOUND)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_FILELOAD:
case __HResults.FUSION_E_INVALID_PRIVATE_ASM_LOCATION:
case __HResults.FUSION_E_SIGNATURE_CHECK_FAILED:
case __HResults.FUSION_E_LOADFROM_BLOCKED:
case __HResults.FUSION_E_CACHEFILE_FAILED:
case __HResults.FUSION_E_ASM_MODULE_MISSING:
case __HResults.FUSION_E_INVALID_NAME:
case __HResults.FUSION_E_PRIVATE_ASM_DISALLOWED:
case __HResults.FUSION_E_HOST_GAC_ASM_MISMATCH:
case __HResults.COR_E_MODULE_HASH_CHECK_FAILED:
case __HResults.FUSION_E_REF_DEF_MISMATCH:
case __HResults.SECURITY_E_INCOMPATIBLE_SHARE:
case __HResults.SECURITY_E_INCOMPATIBLE_EVIDENCE:
case __HResults.SECURITY_E_UNVERIFIABLE:
case __HResults.COR_E_FIXUPSINEXE:
case __HResults.ERROR_TOO_MANY_OPEN_FILES:
case __HResults.ERROR_SHARING_VIOLATION:
case __HResults.ERROR_LOCK_VIOLATION:
case __HResults.ERROR_OPEN_FAILED:
case __HResults.ERROR_DISK_CORRUPT:
case __HResults.ERROR_UNRECOGNIZED_VOLUME:
case __HResults.ERROR_DLL_INIT_FAILED:
case __HResults.FUSION_E_CODE_DOWNLOAD_DISABLED:
case __HResults.CORSEC_E_MISSING_STRONGNAME:
case __HResults.MSEE_E_ASSEMBLYLOADINPROGRESS:
case __HResults.ERROR_FILE_INVALID:
exception = new System.IO.FileLoadException();
shouldDisplayHR = true;
break;
case __HResults.COR_E_PATHTOOLONG:
exception = new System.IO.PathTooLongException();
break;
case __HResults.COR_E_IO:
case __HResults.CTL_E_DEVICEIOERROR:
case unchecked ((int)0x800A793C):
case unchecked ((int)0x800A793D):
exception = new System.IO.IOException();
if (errorCode != __HResults.COR_E_IO)
{
shouldDisplayHR = true;
}
break;
case __HResults.ERROR_FILE_NOT_FOUND:
case __HResults.ERROR_MOD_NOT_FOUND:
case __HResults.ERROR_INVALID_NAME:
case __HResults.CTL_E_FILENOTFOUND:
case __HResults.ERROR_BAD_NET_NAME:
case __HResults.ERROR_BAD_NETPATH:
case __HResults.ERROR_NOT_READY:
case __HResults.ERROR_WRONG_TARGET_NAME:
case __HResults.INET_E_UNKNOWN_PROTOCOL:
case __HResults.INET_E_CONNECTION_TIMEOUT:
case __HResults.INET_E_CANNOT_CONNECT:
case __HResults.INET_E_RESOURCE_NOT_FOUND:
case __HResults.INET_E_OBJECT_NOT_FOUND:
case __HResults.INET_E_DOWNLOAD_FAILURE:
case __HResults.INET_E_DATA_NOT_AVAILABLE:
case __HResults.ERROR_DLL_NOT_FOUND:
case __HResults.CLR_E_BIND_ASSEMBLY_VERSION_TOO_LOW:
case __HResults.CLR_E_BIND_ASSEMBLY_PUBLIC_KEY_MISMATCH:
case __HResults.CLR_E_BIND_ASSEMBLY_NOT_FOUND:
exception = new System.IO.FileNotFoundException();
shouldDisplayHR = true;
break;
case __HResults.COR_E_FORMAT:
exception = new FormatException();
break;
case __HResults.COR_E_INDEXOUTOFRANGE:
case unchecked ((int)0x800a0009):
exception = new IndexOutOfRangeException();
if (errorCode != __HResults.COR_E_INDEXOUTOFRANGE)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_INVALIDCAST:
exception = new InvalidCastException();
break;
case __HResults.COR_E_INVALIDCOMOBJECT:
exception = new InvalidComObjectException();
break;
case __HResults.COR_E_INVALIDOLEVARIANTTYPE:
exception = new InvalidOleVariantTypeException();
break;
case __HResults.COR_E_INVALIDOPERATION:
case __HResults.E_ILLEGAL_STATE_CHANGE:
case __HResults.E_ILLEGAL_METHOD_CALL:
case __HResults.E_ILLEGAL_DELEGATE_ASSIGNMENT:
case __HResults.APPMODEL_ERROR_NO_PACKAGE:
exception = new InvalidOperationException();
if (errorCode != __HResults.COR_E_INVALIDOPERATION)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_MARSHALDIRECTIVE:
exception = new MarshalDirectiveException();
break;
case __HResults.COR_E_METHODACCESS: // MethodAccessException
case __HResults.META_E_CA_FRIENDS_SN_REQUIRED: // MethodAccessException
case __HResults.COR_E_FIELDACCESS:
case __HResults.COR_E_MEMBERACCESS:
exception = new MemberAccessException();
if (errorCode != __HResults.COR_E_METHODACCESS)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_MISSINGFIELD: // MissingFieldException
case __HResults.COR_E_MISSINGMETHOD: // MissingMethodException
case __HResults.COR_E_MISSINGMEMBER:
case unchecked ((int)0x800A01CD):
exception = new MissingMemberException();
break;
case __HResults.COR_E_MISSINGMANIFESTRESOURCE:
exception = new System.Resources.MissingManifestResourceException();
break;
case __HResults.COR_E_NOTSUPPORTED:
case unchecked ((int)0x800A01B6):
case unchecked ((int)0x800A01BD):
case unchecked ((int)0x800A01CA):
case unchecked ((int)0x800A01CB):
exception = new NotSupportedException();
if (errorCode != __HResults.COR_E_NOTSUPPORTED)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_NULLREFERENCE:
exception = new NullReferenceException();
break;
case __HResults.COR_E_OBJECTDISPOSED:
case __HResults.RO_E_CLOSED:
// No default constructor
exception = new ObjectDisposedException(String.Empty);
break;
case __HResults.COR_E_OPERATIONCANCELED:
#if ENABLE_WINRT
exception = new OperationCanceledException();
#endif
break;
case __HResults.COR_E_OVERFLOW:
case __HResults.CTL_E_OVERFLOW:
exception = new OverflowException();
break;
case __HResults.COR_E_PLATFORMNOTSUPPORTED:
exception = new PlatformNotSupportedException(message);
break;
case __HResults.COR_E_RANK:
exception = new RankException();
break;
case __HResults.COR_E_REFLECTIONTYPELOAD:
#if ENABLE_WINRT
exception = new System.Reflection.ReflectionTypeLoadException(null, null);
#endif
break;
case __HResults.COR_E_SECURITY:
case __HResults.CORSEC_E_INVALID_STRONGNAME:
case __HResults.CTL_E_PERMISSIONDENIED:
case unchecked ((int)0x800A01A3):
case __HResults.CORSEC_E_INVALID_PUBLICKEY:
case __HResults.CORSEC_E_SIGNATURE_MISMATCH:
exception = new System.Security.SecurityException();
break;
case __HResults.COR_E_SAFEARRAYRANKMISMATCH:
exception = new SafeArrayRankMismatchException();
break;
case __HResults.COR_E_SAFEARRAYTYPEMISMATCH:
exception = new SafeArrayTypeMismatchException();
break;
case __HResults.COR_E_SERIALIZATION:
exception = ConstructExceptionUsingReflection(
"System.Runtime.Serialization.SerializationException, System.Runtime.Serialization.Primitives, Version=4.0.0.0",
message);
break;
case __HResults.COR_E_SYNCHRONIZATIONLOCK:
exception = new System.Threading.SynchronizationLockException();
break;
case __HResults.COR_E_TARGETINVOCATION:
exception = new System.Reflection.TargetInvocationException(null);
break;
case __HResults.COR_E_TARGETPARAMCOUNT:
exception = new System.Reflection.TargetParameterCountException();
break;
case __HResults.COR_E_TYPEINITIALIZATION:
exception = InteropExtensions.CreateTypeInitializationException(message);
break;
case __HResults.COR_E_TYPELOAD:
case __HResults.RO_E_METADATA_NAME_NOT_FOUND:
case __HResults.CLR_E_BIND_TYPE_NOT_FOUND:
exception = new TypeLoadException();
if (errorCode != __HResults.COR_E_TYPELOAD)
{
shouldDisplayHR = true;
}
break;
case __HResults.COR_E_UNAUTHORIZEDACCESS:
case __HResults.CTL_E_PATHFILEACCESSERROR:
case unchecked ((int)0x800A014F):
exception = new UnauthorizedAccessException();
shouldDisplayHR = true;
break;
case __HResults.COR_E_VERIFICATION:
exception = new System.Security.VerificationException();
break;
case __HResults.E_NOTIMPL:
exception = new NotImplementedException();
break;
case __HResults.E_OUTOFMEMORY:
case __HResults.CTL_E_OUTOFMEMORY:
case unchecked ((int)0x800A7919):
exception = new OutOfMemoryException();
if (errorCode != __HResults.E_OUTOFMEMORY)
{
shouldDisplayHR = true;
}
break;
#if ENABLE_WINRT
case __HResults.E_XAMLPARSEFAILED:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.Markup.XamlParseException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
case __HResults.E_ELEMENTNOTAVAILABLE:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.Automation.ElementNotAvailableException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
case __HResults.E_ELEMENTNOTENABLED:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.Automation.ElementNotEnabledException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
case __HResults.E_LAYOUTCYCLE:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.LayoutCycleException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
#endif // ENABLE_WINRT
case __HResults.COR_E_AMBIGUOUSMATCH: // AmbiguousMatchException
case __HResults.COR_E_APPLICATION: // ApplicationException
case __HResults.COR_E_APPDOMAINUNLOADED: // AppDomainUnloadedException
case __HResults.COR_E_CANNOTUNLOADAPPDOMAIN: // CannotUnloadAppDomainException
case __HResults.COR_E_CODECONTRACTFAILED: // ContractException
case __HResults.COR_E_CONTEXTMARSHAL: // ContextMarshalException
case __HResults.CORSEC_E_CRYPTO: // CryptographicException
case __HResults.CORSEC_E_CRYPTO_UNEX_OPER: // CryptographicUnexpectedOperationException
case __HResults.COR_E_EXECUTIONENGINE: // ExecutionEngineException
case __HResults.COR_E_INSUFFICIENTEXECUTIONSTACK: // InsufficientExecutionStackException
case __HResults.COR_E_INVALIDFILTERCRITERIA: // InvalidFilterCriteriaException
case __HResults.COR_E_INVALIDPROGRAM: // InvalidProgramException
case __HResults.COR_E_MULTICASTNOTSUPPORTED: // MulticastNotSupportedException
case __HResults.COR_E_REMOTING: // RemotingException
case __HResults.COR_E_RUNTIMEWRAPPED: // RuntimeWrappedException
case __HResults.COR_E_SERVER: // ServerException
case __HResults.COR_E_STACKOVERFLOW: // StackOverflowException
case __HResults.CTL_E_OUTOFSTACKSPACE: // StackOverflowException
case __HResults.COR_E_SYSTEM: // SystemException
case __HResults.COR_E_TARGET: // TargetException
case __HResults.COR_E_THREADABORTED: // TargetException
case __HResults.COR_E_THREADINTERRUPTED: // ThreadInterruptedException
case __HResults.COR_E_THREADSTATE: // ThreadStateException
case __HResults.COR_E_THREADSTART: // ThreadStartException
case __HResults.COR_E_TYPEUNLOADED: // TypeUnloadedException
case __HResults.CORSEC_E_POLICY_EXCEPTION: // PolicyException
case __HResults.CORSEC_E_NO_EXEC_PERM: // PolicyException
case __HResults.CORSEC_E_MIN_GRANT_FAIL: // PolicyException
case __HResults.CORSEC_E_XMLSYNTAX: // XmlSyntaxException
case __HResults.ISS_E_ALLOC_TOO_LARGE: // IsolatedStorageException
case __HResults.ISS_E_BLOCK_SIZE_TOO_SMALL: // IsolatedStorageException
case __HResults.ISS_E_CALLER: // IsolatedStorageException
case __HResults.ISS_E_CORRUPTED_STORE_FILE: // IsolatedStorageException
case __HResults.ISS_E_CREATE_DIR: // IsolatedStorageException
case __HResults.ISS_E_CREATE_MUTEX: // IsolatedStorageException
case __HResults.ISS_E_DEPRECATE: // IsolatedStorageException
case __HResults.ISS_E_FILE_NOT_MAPPED: // IsolatedStorageException
case __HResults.ISS_E_FILE_WRITE: // IsolatedStorageException
case __HResults.ISS_E_GET_FILE_SIZE: // IsolatedStorageException
case __HResults.ISS_E_ISOSTORE: // IsolatedStorageException
case __HResults.ISS_E_LOCK_FAILED: // IsolatedStorageException
case __HResults.ISS_E_MACHINE: // IsolatedStorageException
case __HResults.ISS_E_MACHINE_DACL: // IsolatedStorageException
case __HResults.ISS_E_MAP_VIEW_OF_FILE: // IsolatedStorageException
case __HResults.ISS_E_OPEN_FILE_MAPPING: // IsolatedStorageException
case __HResults.ISS_E_OPEN_STORE_FILE: // IsolatedStorageException
case __HResults.ISS_E_PATH_LENGTH: // IsolatedStorageException
case __HResults.ISS_E_SET_FILE_POINTER: // IsolatedStorageException
case __HResults.ISS_E_STORE_NOT_OPEN: // IsolatedStorageException
case __HResults.ISS_E_STORE_VERSION: // IsolatedStorageException
case __HResults.ISS_E_TABLE_ROW_NOT_FOUND: // IsolatedStorageException
case __HResults.ISS_E_USAGE_WILL_EXCEED_QUOTA: // IsolatedStorageException
case __HResults.E_FAIL:
default:
break;
}
if (exception == null)
{
if (createCOMException)
{
exception = new COMException();
if (errorCode != __HResults.E_FAIL)
{
shouldDisplayHR = true;
}
}
else
{
exception = new Exception();
if (errorCode != __HResults.COR_E_EXCEPTION)
{
shouldDisplayHR = true;
}
}
}
bool shouldConstructMessage = false;
if (hasErrorInfo)
{
// If there is a IErrorInfo/IRestrictedErrorInfo, only construct a new error message if
// the message is not available and do not use the shouldDisplayHR setting
if (message == null)
{
shouldConstructMessage = true;
}
}
else
{
// If there is no IErrorInfo, use the shouldDisplayHR setting from the big switch/case above
shouldConstructMessage = shouldDisplayHR;
}
if (shouldConstructMessage)
{
//
// Append the HR into error message, just in case the app wants to look at the HR in
// message to determine behavior. We didn't expose HResult property until v4.5 and
// GetHRFromException has side effects so probably Message was their only choice.
// This behavior is probably not exactly the same as in desktop but it is fine to append
// more message at the end. In any case, having the HR in the error message are helpful
// to developers.
// This makes sure:
// 1. We always have a HR 0xNNNNNNNN in the message
// 2. Put in a nice "Exception thrown from HRESULT" message if we can
// 3. Wrap it in () if there is an existing message
//
// TODO: Add Symbolic Name into Messaage, convert 0x80020006 to DISP_E_UNKNOWNNAME
string hrMessage = String.Format("{0} 0x{1:X}", SR.Excep_FromHResult, errorCode);
message = ExternalInterop.GetMessage(errorCode);
// Always make sure we have at least the HRESULT part in retail build or when the message
// is empty.
if (message == null)
{
message = hrMessage;
}
else
{
message = message + " (" + hrMessage + ")";
}
}
if (message != null)
{
// Set message explicitly rather than calling constructor because certain ctors would append a
// prefix to the message and that is not what we want
InteropExtensions.SetExceptionMessage(exception, message);
}
InteropExtensions.SetExceptionErrorCode(exception, errorCode);
return(exception);
}
Exception createExceptionForNSError(NSError error)
{
var ret = default(Exception);
var urlError = default(NSUrlError);
var webExceptionStatus = WebExceptionStatus.UnknownError;
// If the domain is something other than NSUrlErrorDomain,
// just grab the default info
if (error.Domain != NSError.NSUrlErrorDomain) goto leave;
// Convert the error code into an enumeration (this is future
// proof, rather than just casting integer)
if (!Enum.TryParse<NSUrlError>(error.Code.ToString(), out urlError)) urlError = NSUrlError.Unknown;
// Parse the enum into a web exception status or exception. some
// of these values don't necessarily translate completely to
// what WebExceptionStatus supports, so made some best guesses
// here. for your reading pleasure, compare these:
//
// Apple docs: https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Miscellaneous/Foundation_Constants/Reference/reference.html
// .NET docs: http://msdn.microsoft.com/en-us/library/system.net.webexceptionstatus(v=vs.110).aspx
switch(urlError) {
case NSUrlError.Cancelled:
case NSUrlError.UserCancelledAuthentication:
ret = new OperationCanceledException();
break;
case NSUrlError.BadURL:
case NSUrlError.UnsupportedURL:
case NSUrlError.CannotConnectToHost:
case NSUrlError.ResourceUnavailable:
case NSUrlError.NotConnectedToInternet:
case NSUrlError.UserAuthenticationRequired:
webExceptionStatus = WebExceptionStatus.ConnectFailure;
break;
case NSUrlError.TimedOut:
webExceptionStatus = WebExceptionStatus.Timeout;
break;
case NSUrlError.CannotFindHost:
case NSUrlError.DNSLookupFailed:
webExceptionStatus = WebExceptionStatus.NameResolutionFailure;
break;
case NSUrlError.DataLengthExceedsMaximum:
webExceptionStatus = WebExceptionStatus.MessageLengthLimitExceeded;
break;
case NSUrlError.NetworkConnectionLost:
webExceptionStatus = WebExceptionStatus.ConnectionClosed;
break;
case NSUrlError.HTTPTooManyRedirects:
case NSUrlError.RedirectToNonExistentLocation:
webExceptionStatus = WebExceptionStatus.ProtocolError;
break;
case NSUrlError.BadServerResponse:
case NSUrlError.ZeroByteResource:
case NSUrlError.CannotDecodeContentData:
case NSUrlError.CannotDecodeRawData:
case NSUrlError.CannotParseResponse:
case NSUrlError.FileDoesNotExist:
case NSUrlError.FileIsDirectory:
case NSUrlError.NoPermissionsToReadFile:
case NSUrlError.CannotLoadFromNetwork:
case NSUrlError.CannotCreateFile:
case NSUrlError.CannotOpenFile:
case NSUrlError.CannotCloseFile:
case NSUrlError.CannotWriteToFile:
case NSUrlError.CannotRemoveFile:
case NSUrlError.CannotMoveFile:
case NSUrlError.DownloadDecodingFailedMidStream:
case NSUrlError.DownloadDecodingFailedToComplete:
webExceptionStatus = WebExceptionStatus.ReceiveFailure;
break;
case NSUrlError.SecureConnectionFailed:
webExceptionStatus = WebExceptionStatus.SecureChannelFailure;
break;
case NSUrlError.ServerCertificateHasBadDate:
case NSUrlError.ServerCertificateHasUnknownRoot:
case NSUrlError.ServerCertificateNotYetValid:
case NSUrlError.ServerCertificateUntrusted:
case NSUrlError.ClientCertificateRejected:
webExceptionStatus = WebExceptionStatus.TrustFailure;
break;
}
// If we parsed a web exception status code, create an exception
// for it
if (webExceptionStatus != WebExceptionStatus.UnknownError) {
ret = new WebException(error.LocalizedDescription, webExceptionStatus);
}
leave:
// If no exception generated yet, throw a normal exception with
// the error message.
return ret ?? new Exception(error.LocalizedDescription);
}
public TUSException(OperationCanceledException ex)
: base(ex.Message, ex, WebExceptionStatus.RequestCanceled, null)
{
this.OriginalException = null;
}
/// <summary>
/// Execute the operation asynchronously.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">The state.</param>
/// <returns>Task.</returns>
protected override async Task<int?> ExecuteAsync(OperationExecutionToken<OleDbConnection, OleDbTransaction> executionToken, OperationImplementationAsync<OleDbConnection, OleDbTransaction> implementation, CancellationToken cancellationToken, object state)
{
if (executionToken == null)
throw new ArgumentNullException("executionToken", "executionToken is null.");
if (implementation == null)
throw new ArgumentNullException("implementation", "implementation is null.");
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
try
{
using (var con = CreateConnection())
{
var rows = await implementation(con, null, cancellationToken).ConfigureAwait(false);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return rows;
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert Exception into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionCanceled(executionToken, startTime, DateTimeOffset.Now, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
}
private void ExecuteInternal()
{
Debug.Assert(_operation >= Operation.Read && _operation <= Operation.WriteGather);
long result = 0;
Exception?exception = null;
try
{
// This is the operation's last chance to be canceled.
if (_cancellationToken.IsCancellationRequested)
{
exception = new OperationCanceledException(_cancellationToken);
}
else
{
switch (_operation)
{
case Operation.Read:
Memory <byte> writableSingleSegment = MemoryMarshal.AsMemory(_singleSegment);
result = RandomAccess.ReadAtOffset(_fileHandle, writableSingleSegment.Span, _fileOffset);
break;
case Operation.Write:
result = RandomAccess.WriteAtOffset(_fileHandle, _singleSegment.Span, _fileOffset);
break;
case Operation.ReadScatter:
Debug.Assert(_readScatterBuffers != null);
result = RandomAccess.ReadScatterAtOffset(_fileHandle, _readScatterBuffers, _fileOffset);
break;
case Operation.WriteGather:
Debug.Assert(_writeGatherBuffers != null);
result = RandomAccess.WriteGatherAtOffset(_fileHandle, _writeGatherBuffers, _fileOffset);
break;
}
}
}
catch (Exception e)
{
exception = e;
}
finally
{
_operation = Operation.None;
_context = null;
_cancellationToken = default;
_singleSegment = default;
_readScatterBuffers = null;
_writeGatherBuffers = null;
}
if (exception == null)
{
_source.SetResult(result);
}
else
{
_source.SetException(exception);
}
}
private static void HandleCanceledOperations(CancellationToken cancellationToken, TaskCompletionSource <HttpResponseMessage> tcs, OperationCanceledException e)
{
if (cancellationToken.IsCancellationRequested && e.CancellationToken == cancellationToken)
{
tcs.TrySetCanceled();
}
else
{
tcs.TrySetException(e);
}
}
//-----------------------------------------------------------------------------------
// Marks the end of a query's execution, waiting for all tasks to finish and
// propagating any relevant exceptions. Note that the full set of tasks must have
// been initialized (with SetTask) before calling this.
//
internal void QueryEnd(bool userInitiatedDispose)
{
Debug.Assert(_rootTask != null);
//Debug.Assert(Task.Current == null || (Task.Current != _rootTask && Task.Current.Parent != _rootTask));
if (Interlocked.Exchange(ref _alreadyEnded, 1) == 0)
{
// There are four cases:
// Case #1: Wait produced an exception that is not OCE(ct), or an AggregateException which is not full of OCE(ct) ==> We rethrow.
// Case #2: External cancellation has been requested ==> we'll manually throw OCE(externalToken).
// Case #3a: We are servicing a call to Dispose() (and possibly also external cancellation has been requested).. simply return.
// Case #3b: The enumerator has already been disposed (and possibly also external cancellation was requested). Throw an ODE.
// Case #4: No exceptions or explicit call to Dispose() by this caller ==> we just return.
// See also "InlinedAggregationOperator" which duplicates some of this logic for the aggregators.
// See also "QueryOpeningEnumerator" which duplicates some of this logic.
// See also "ExceptionAggregator" which duplicates some of this logic.
try
{
// Wait for all the tasks to complete
// If any of the tasks ended in the Faulted stated, an AggregateException will be thrown.
_rootTask.Wait();
}
catch (AggregateException ae)
{
AggregateException flattenedAE = ae.Flatten();
bool allOCEsOnTrackedExternalCancellationToken = true;
for (int i = 0; i < flattenedAE.InnerExceptions.Count; i++)
{
OperationCanceledException oce = flattenedAE.InnerExceptions[i] as OperationCanceledException;
// we only let it pass through iff:
// it is not null, not default, and matches the exact token we were given as being the external token
// and the external Token is actually canceled (ie not a spoof OCE(extCT) for a non-canceled extCT)
if (oce == null ||
!oce.CancellationToken.IsCancellationRequested ||
oce.CancellationToken != _cancellationState.ExternalCancellationToken)
{
allOCEsOnTrackedExternalCancellationToken = false;
break;
}
}
// if all the exceptions were OCE(externalToken), then we will propagate only a single OCE(externalToken) below
// otherwise, we flatten the aggregate (because the WaitAll above already aggregated) and rethrow.
if (!allOCEsOnTrackedExternalCancellationToken)
{
throw flattenedAE; // Case #1
}
}
finally
{
//_rootTask don't support Dispose on some platforms
IDisposable disposable = _rootTask as IDisposable;
if (disposable != null)
{
disposable.Dispose();
}
}
if (_cancellationState.MergedCancellationToken.IsCancellationRequested)
{
// cancellation has occurred but no user-delegate exceptions were detected
// NOTE: it is important that we see other state variables correctly here, and that
// read-reordering hasn't played havoc.
// This is OK because
// 1. all the state writes (eg in the Initiate* methods) are volatile writes (standard .NET MM)
// 2. tokenCancellationRequested is backed by a volatile field, hence the reads below
// won't get reordered about the read of token.IsCancellationRequested.
// If the query has already been disposed, we don't want to throw an OCE
if (!_cancellationState.TopLevelDisposedFlag.Value)
{
CancellationState.ThrowWithStandardMessageIfCanceled(_cancellationState.ExternalCancellationToken); // Case #2
}
//otherwise, given that there were no user-delegate exceptions (they would have been rethrown above),
//the only remaining situation is user-initiated dispose.
Debug.Assert(_cancellationState.TopLevelDisposedFlag.Value);
// If we aren't actively disposing, that means somebody else previously disposed
// of the enumerator. We must throw an ObjectDisposedException.
if (!userInitiatedDispose)
{
throw new ObjectDisposedException("enumerator", SR.PLINQ_DisposeRequested); // Case #3
}
}
// Case #4. nothing to do.
}
}
/// <summary>
/// Executes the specified operation asynchronously.
/// </summary>
/// <param name="executionToken"></param>
/// <param name="implementation"></param>
/// <param name="cancellationToken"></param>
/// <param name="state"></param>
/// <returns></returns>
protected override async Task <int?> ExecuteAsync(CommandExecutionToken <SQLiteCommand, SQLiteParameter> executionToken, CommandImplementationAsync <SQLiteCommand> implementation, CancellationToken cancellationToken, object state)
{
if (executionToken == null)
{
throw new ArgumentNullException("executionToken", "executionToken is null.");
}
if (implementation == null)
{
throw new ArgumentNullException("implementation", "implementation is null.");
}
var mode = DisableLocks ? LockType.None : (executionToken as SQLiteCommandExecutionToken)?.LockType ?? LockType.Write;
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
IDisposable lockToken = null;
try
{
switch (mode)
{
case LockType.Read: lockToken = await SyncLock.ReaderLockAsync().ConfigureAwait(false); break;
case LockType.Write: lockToken = await SyncLock.WriterLockAsync().ConfigureAwait(false); break;
}
using (var con = await CreateConnectionAsync(cancellationToken).ConfigureAwait(false))
{
using (var cmd = new SQLiteCommand())
{
cmd.Connection = con;
if (DefaultCommandTimeout.HasValue)
{
cmd.CommandTimeout = (int)DefaultCommandTimeout.Value.TotalSeconds;
}
cmd.CommandText = executionToken.CommandText;
cmd.CommandType = executionToken.CommandType;
foreach (var param in executionToken.Parameters)
{
cmd.Parameters.Add(param);
}
executionToken.ApplyCommandOverrides(cmd);
var rows = await implementation(cmd).ConfigureAwait(false);
executionToken.RaiseCommandExecuted(cmd, rows);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return(rows);
}
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert SQLiteException into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex2, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
finally
{
if (lockToken != null)
{
lockToken.Dispose();
}
}
}
private void OpenConnection(IConnection connection,
string data,
CancellationToken disconnectToken,
Action initializeCallback,
Action <Exception> errorCallback)
{
// If we're reconnecting add /connect to the url
bool reconnecting = initializeCallback == null;
var callbackInvoker = new ThreadSafeInvoker();
var requestDisposer = new Disposer();
Action initializeInvoke = () =>
{
callbackInvoker.Invoke(initializeCallback);
};
var url = connection.Url + (reconnecting ? "reconnect" : "connect") + GetReceiveQueryString(connection, data);
connection.Trace(TraceLevels.Events, "SSE: GET {0}", url);
HttpClient.Get(url, req =>
{
_request = req;
_request.Accept = "text/event-stream";
connection.PrepareRequest(_request);
}, isLongRunning: true).ContinueWith(task =>
{
if (task.IsFaulted || task.IsCanceled)
{
Exception exception;
if (task.IsCanceled)
{
exception = new OperationCanceledException(Resources.Error_TaskCancelledException);
}
else
{
exception = task.Exception.Unwrap();
}
if (errorCallback != null)
{
callbackInvoker.Invoke((cb, ex) => cb(ex), errorCallback, exception);
}
else if (!_stop && reconnecting)
{
// Only raise the error event if we failed to reconnect
connection.OnError(exception);
Reconnect(connection, data, disconnectToken);
}
requestDisposer.Dispose();
}
else
{
// If the disconnect token is canceled the response to the task doesn't matter.
if (disconnectToken.IsCancellationRequested)
{
return;
}
var response = task.Result;
Stream stream = response.GetStream();
var eventSource = new EventSourceStreamReader(connection, stream);
var esCancellationRegistration = disconnectToken.SafeRegister(state =>
{
_stop = true;
((IRequest)state).Abort();
},
_request);
eventSource.Opened = () =>
{
// This will noop if we're not in the reconnecting state
if (connection.ChangeState(ConnectionState.Reconnecting, ConnectionState.Connected))
{
// Raise the reconnect event if the connection comes back up
connection.OnReconnected();
}
};
eventSource.Message = sseEvent =>
{
if (sseEvent.EventType == EventType.Data)
{
if (sseEvent.Data.Equals("initialized", StringComparison.OrdinalIgnoreCase))
{
return;
}
bool shouldReconnect;
bool disconnected;
TransportHelper.ProcessResponse(connection, sseEvent.Data, out shouldReconnect, out disconnected, initializeInvoke);
if (disconnected)
{
_stop = true;
connection.Disconnect();
}
}
};
eventSource.Closed = exception =>
{
if (exception != null)
{
// Check if the request is aborted
bool isRequestAborted = ExceptionHelper.IsRequestAborted(exception);
if (!isRequestAborted)
{
// Don't raise exceptions if the request was aborted (connection was stopped).
connection.OnError(exception);
}
}
requestDisposer.Dispose();
esCancellationRegistration.Dispose();
response.Dispose();
if (_stop)
{
AbortHandler.CompleteAbort();
}
else if (AbortHandler.TryCompleteAbort())
{
// Abort() was called, so don't reconnect
}
else
{
Reconnect(connection, data, disconnectToken);
}
};
eventSource.Start();
}
});
var requestCancellationRegistration = disconnectToken.SafeRegister(state =>
{
if (state != null)
{
// This will no-op if the request is already finished.
((IRequest)state).Abort();
}
if (errorCallback != null)
{
callbackInvoker.Invoke((cb, token) =>
{
cb(new OperationCanceledException(Resources.Error_ConnectionCancelled, token));
}, errorCallback, disconnectToken);
}
}, _request);
requestDisposer.Set(requestCancellationRegistration);
}
public static void OperationCanceledException_PropagatesThroughCanceledTask(int lineNumber, Task task, OperationCanceledException expected)
{
var caught = Assert.ThrowsAny <OperationCanceledException>(() => task.GetAwaiter().GetResult());
Assert.Same(expected, caught);
}
//Identified as a possible concern in bug 544743.
private static bool SemaphoreSlim_MultipleWaitersWithSeparateTokens()
{
TestHarness.TestLog("* SemaphoreSlimCancellationTests.SemaphoreSlim_MultipleWaitersWithSeparateTokens()");
bool passed = true;
SemaphoreSlim semaphoreSlim = new SemaphoreSlim(0); // this semaphore will always be blocked for waiters.
const int waitTimeoutMilliseconds = 1000;
const int waitBeforeCancelMilliseconds = 300;
CancellationTokenSource cts1 = new CancellationTokenSource();
CancellationTokenSource cts2 = new CancellationTokenSource();
bool wait1WokeUpNormally = false;
bool wait2WokeUpNormally = false;
OperationCanceledException wait1OCE = null;
OperationCanceledException wait2OCE = null;
int wait1ElapsedMilliseconds = -1;
int wait2ElapsedMilliseconds = -1;
CountdownEvent cde_allThreadsFinished = new CountdownEvent(2);
//Queue up cancellation of CTS1.
ThreadPool.QueueUserWorkItem(
unused =>
{
Thread.Sleep(waitBeforeCancelMilliseconds); // wait a little while.
cts1.Cancel();
}
);
//Queue up a wait on mres(CTS1)
ThreadPool.QueueUserWorkItem(
unused =>
{
Stopwatch sw = Stopwatch.StartNew();
try
{
wait1WokeUpNormally = semaphoreSlim.Wait(waitTimeoutMilliseconds, cts1.Token);
}
catch (OperationCanceledException oce)
{
wait1OCE = oce;
}
finally
{
sw.Stop();
}
wait1ElapsedMilliseconds = (int)sw.Elapsed.TotalMilliseconds;
cde_allThreadsFinished.Signal();
}
);
//Queue up a wait on mres(CTS2)
ThreadPool.QueueUserWorkItem(
unused =>
{
Stopwatch sw = Stopwatch.StartNew();
try
{
wait2WokeUpNormally = semaphoreSlim.Wait(waitTimeoutMilliseconds, cts2.Token);
}
catch (OperationCanceledException oce)
{
wait2OCE = oce;
}
finally
{
sw.Stop();
}
wait2ElapsedMilliseconds = (int)sw.Elapsed.TotalMilliseconds;
cde_allThreadsFinished.Signal();
}
);
cde_allThreadsFinished.Wait();
Console.WriteLine(" (first wait duration [expecting <={0,4}] ={1,4})", 500, wait1ElapsedMilliseconds);
Console.WriteLine(" (second wait duration [expecting {0,4} +-50ms] ={1,4})", waitTimeoutMilliseconds, wait2ElapsedMilliseconds);
passed &= TestHarnessAssert.IsFalse(wait1WokeUpNormally, "The first wait should be canceled.");
passed &= TestHarnessAssert.IsNotNull(wait1OCE, "The first wait should have thrown an OCE.");
passed &= TestHarnessAssert.AreEqual(cts1.Token, OCEHelper.ExtractCT(wait1OCE), "The first wait should have thrown an OCE(cts1.token).");
passed &= TestHarnessAssert.IsTrue(wait1ElapsedMilliseconds < 500, "[Warning: Timing Sensitive Test] The first wait should have canceled before 500ms elapsed.");
passed &= TestHarnessAssert.IsFalse(wait2WokeUpNormally, "The second wait should not have woken up normally. It should have woken due to timeout.");
passed &= TestHarnessAssert.IsNull(wait2OCE, "The second wait should not have thrown an OCE.");
passed &= TestHarnessAssert.IsTrue(950 <= wait2ElapsedMilliseconds && wait2ElapsedMilliseconds <= 1050, "[Warning: Timing Sensitive Test] The second wait should have waited 1000ms +-50ms). Actual wait duration = " + wait2ElapsedMilliseconds);
return(passed);
}
public override Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException(nameof(offset));
}
if (count < 0)
{
throw new ArgumentOutOfRangeException(nameof(count));
}
if (offset > buffer.Length - count)
{
throw new ArgumentException(SR.net_http_buffer_insufficient_length, nameof(buffer));
}
CheckDisposed();
EventSourceTrace("Buffer: {0}, Offset: {1}, Count: {2}", buffer.Length, offset, count);
// Check for cancellation
if (cancellationToken.IsCancellationRequested)
{
EventSourceTrace("Canceled");
return(Task.FromCanceled <int>(cancellationToken));
}
lock (_lockObject)
{
VerifyInvariants();
// If there's currently a pending read, fail this read, as we don't support concurrent reads.
if (_pendingReadRequest != null)
{
EventSourceTrace("Failing due to existing pending read; concurrent reads not supported.");
return(Task.FromException <int>(new InvalidOperationException(SR.net_http_content_no_concurrent_reads)));
}
// If the stream was already completed with failure, complete the read as a failure.
if (_completed != null && _completed != s_completionSentinel)
{
EventSourceTrace("Failing read with error: {0}", _completed);
OperationCanceledException oce = _completed as OperationCanceledException;
return((oce != null && oce.CancellationToken.IsCancellationRequested) ?
Task.FromCanceled <int>(oce.CancellationToken) :
Task.FromException <int>(MapToReadWriteIOException(_completed, isRead: true)));
}
// Quick check for if no data was actually requested. We do this after the check
// for errors so that we can still fail the read and transfer the exception if we should.
if (count == 0)
{
return(s_zeroTask);
}
// If there's any data left over from a previous call, grab as much as we can.
if (_remainingDataCount > 0)
{
int bytesToCopy = Math.Min(count, _remainingDataCount);
Buffer.BlockCopy(_remainingData, _remainingDataOffset, buffer, offset, bytesToCopy);
_remainingDataOffset += bytesToCopy;
_remainingDataCount -= bytesToCopy;
Debug.Assert(_remainingDataCount >= 0, "The remaining count should never go negative");
Debug.Assert(_remainingDataOffset <= _remainingData.Length, "The remaining offset should never exceed the buffer size");
EventSourceTrace("Read {0} bytes", bytesToCopy);
return(Task.FromResult(bytesToCopy));
}
// If the stream has already been completed, complete the read immediately.
if (_completed == s_completionSentinel)
{
EventSourceTrace("Stream already completed");
return(s_zeroTask);
}
// Finally, the stream is still alive, and we want to read some data, but there's no data
// in the buffer so we need to register ourself to get the next write.
if (cancellationToken.CanBeCanceled)
{
// If the cancellation token is cancelable, then we need to register for cancellation.
// We create a special CancelableReadState that carries with it additional info:
// the cancellation token and the registration with that token. When cancellation
// is requested, we schedule a work item that tries to remove the read state
// from being pending, canceling it in the process. This needs to happen under the
// lock, which is why we schedule the operation to run asynchronously: if it ran
// synchronously, it could deadlock due to code on another thread holding the lock
// and calling Dispose on the registration concurrently with the call to Cancel
// the cancellation token. Dispose on the registration won't return until the action
// associated with the registration has completed, but if that action is currently
// executing and is blocked on the lock that's held while calling Dispose... deadlock.
var crs = new CancelableReadState(buffer, offset, count, this, cancellationToken);
crs._registration = cancellationToken.Register(s1 =>
{
((CancelableReadState)s1)._stream.EventSourceTrace("Cancellation invoked. Queueing work item to cancel read state");
Task.Factory.StartNew(s2 =>
{
var crsRef = (CancelableReadState)s2;
Debug.Assert(crsRef._token.IsCancellationRequested, "We should only be here if cancellation was requested.");
lock (crsRef._stream._lockObject)
{
if (crsRef._stream._pendingReadRequest == crsRef)
{
crsRef._stream.EventSourceTrace("Canceling");
crsRef.TrySetCanceled(crsRef._token);
crsRef._stream.ClearPendingReadRequest();
}
}
}, s1, CancellationToken.None, TaskCreationOptions.None, TaskScheduler.Default);
}, crs);
_pendingReadRequest = crs;
}
else
{
// The token isn't cancelable. Just create a normal read state.
_pendingReadRequest = new ReadState(buffer, offset, count);
}
_easy._associatedMultiAgent.RequestUnpause(_easy);
_easy._selfStrongToWeakReference.MakeStrong(); // convert from a weak to a strong ref to keep the easy alive during the read
return(_pendingReadRequest.Task);
}
}
public static void ReportingCancelled(this ILog logger, OperationCanceledException ex)
{
logger.Error(ex, "Report execution cancelled");
}
public static void AsyncMethodBuilderTCreate_SetExceptionTest()
{
// Creating a task builder, building it, completing it faulted, and making sure it can't be reset
{
var atmb = AsyncTaskMethodBuilder<int>.Create();
var t = atmb.Task;
Assert.True(t.Status == TaskStatus.WaitingForActivation, " > FAILURE. Builder should still be active (ATMBT, build then fault)");
atmb.SetException(new InvalidCastException());
Assert.True(t.Status == TaskStatus.Faulted, " > FAILURE. Builder should be faulted after an exception occurs (ATMBT, build then fault)");
Assert.True(t.Exception.InnerException is InvalidCastException, " > FAILURE. Wrong exception found in builder (ATMBT, build then fault)");
Assert.Throws<InvalidOperationException>(
() => { atmb.SetResult(44); });
Assert.Throws<InvalidOperationException>(
() => { atmb.SetException(new Exception()); });
}
// Creating a task builder, completing it faulted, building it, and making sure it can't be reset
{
var atmb = AsyncTaskMethodBuilder<int>.Create();
atmb.SetException(new InvalidCastException());
var t = atmb.Task;
Assert.True(t.Status == TaskStatus.Faulted, " > FAILURE. Builder should be faulted after an exception occurs (ATMBT, fault then build)");
Assert.True(t.Exception.InnerException is InvalidCastException, " > FAILURE. Wrong exception found in builder (ATMBT, fault then build)");
Assert.Throws<InvalidOperationException>(
() => { atmb.SetResult(44); });
Assert.Throws<InvalidOperationException>(
() => { atmb.SetException(new Exception()); });
}
// Test cancellation
{
var atmb = AsyncTaskMethodBuilder<int>.Create();
var oce = new OperationCanceledException();
atmb.SetException(oce);
var t = atmb.Task;
Assert.True(t.Status == TaskStatus.Canceled, " > FAILURE. Builder should be canceled from an unhandled OCE (ATMBT cancellation)");
try
{
t.GetAwaiter().GetResult();
Assert.True(false, " > FAILURE. Excepted GetResult to throw. (ATMBT cancellation)");
}
catch (Exception exc)
{
Assert.True(Object.ReferenceEquals(oce, exc), " > FAILURE. Excepted original OCE to be thrown. (ATMBT cancellation)");
}
Assert.Throws<InvalidOperationException>(
() => { atmb.SetResult(44); });
Assert.Throws<InvalidOperationException>(
() => { atmb.SetException(new Exception()); });
}
}
internal async Task ProcessRequestAsync(HttpContextBase context)
{
Exception exception = _exceptionInfo.SourceException;
Contract.Assert(exception != null);
OperationCanceledException canceledException = exception as OperationCanceledException;
if (canceledException != null)
{
// If the route throws a cancelation exception, then we'll abort the request instead of
// reporting an 'error'. We don't expect this to happen, but aborting the request is
// consistent with our behavior in other hosts.
context.Request.Abort();
return;
}
HttpRequestMessage request = context.GetOrCreateHttpRequestMessage();
HttpResponseMessage response = null;
CancellationToken cancellationToken = context.Response.GetClientDisconnectedTokenWhenFixed();
HttpResponseException responseException = exception as HttpResponseException;
try
{
if (responseException != null)
{
response = responseException.Response;
Contract.Assert(response != null);
// This method call is hardened and designed not to throw exceptions (since they won't be caught
// and handled further by its callers).
await HttpControllerHandler.CopyResponseAsync(context, request, response, _exceptionLogger,
_exceptionHandler, cancellationToken);
}
else
{
// This method call is hardened and designed not to throw exceptions (since they won't be caught and
// handled further by its callers).
bool handled = await HttpControllerHandler.CopyErrorResponseAsync(
WebHostExceptionCatchBlocks.HttpWebRoute, context, request, null,
_exceptionInfo.SourceException, _exceptionLogger, _exceptionHandler, cancellationToken);
if (!handled)
{
_exceptionInfo.Throw();
}
}
}
catch (OperationCanceledException)
{
// This block handles cancellations that might occur while we're writing an 'error' response.
//
// HttpTaskAsyncHandler treats a canceled task as an unhandled exception (logged to Application event
// log). Instead of returning a canceled task, abort the request and return a completed task.
context.Request.Abort();
}
finally
{
// The other HttpTaskAsyncHandler is HttpControllerHandler; it has similar cleanup logic.
request.DisposeRequestResources();
request.Dispose();
if (response != null)
{
response.Dispose();
}
}
}
/// <summary>
/// Executes the specified operation asynchronously.
/// </summary>
/// <param name="executionToken"></param>
/// <param name="implementation"></param>
/// <param name="cancellationToken"></param>
/// <param name="state"></param>
/// <returns></returns>
protected override async Task<int?> ExecuteAsync(CommandExecutionToken<SQLiteCommand, SQLiteParameter> executionToken, CommandImplementationAsync<SQLiteCommand> implementation, CancellationToken cancellationToken, object state)
{
if (executionToken == null)
throw new ArgumentNullException("executionToken", "executionToken is null.");
if (implementation == null)
throw new ArgumentNullException("implementation", "implementation is null.");
var mode = DisableLocks ? LockType.None : (executionToken as SQLiteCommandExecutionToken)?.LockType ?? LockType.Write;
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
IDisposable lockToken = null;
try
{
switch (mode)
{
case LockType.Read: lockToken = await SyncLock.ReaderLockAsync().ConfigureAwait(false); break;
case LockType.Write: lockToken = await SyncLock.WriterLockAsync().ConfigureAwait(false); break;
}
using (var con = await CreateConnectionAsync(cancellationToken).ConfigureAwait(false))
{
using (var cmd = new SQLiteCommand())
{
cmd.Connection = con;
if (DefaultCommandTimeout.HasValue)
cmd.CommandTimeout = (int)DefaultCommandTimeout.Value.TotalSeconds;
cmd.CommandText = executionToken.CommandText;
cmd.CommandType = executionToken.CommandType;
foreach (var param in executionToken.Parameters)
cmd.Parameters.Add(param);
executionToken.ApplyCommandOverrides(cmd);
var rows = await implementation(cmd).ConfigureAwait(false);
executionToken.RaiseCommandExecuted(cmd, rows);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return rows;
}
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert SQLiteException into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex2, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
finally
{
if (lockToken != null)
lockToken.Dispose();
}
}
private void Poll()
{
// This is to ensure that we do not accidently fire off another poll after being told to stop
lock (_stopLock)
{
// Only poll if we're running
if (_running == 0)
{
return;
}
// A url is required
string url = ResolveUrl();
_httpClient.Post(url, request =>
{
PrepareRequest(request);
_currentRequest = request;
// This is called just prior to posting the request to ensure that any in-flight polling request
// is always executed before an OnAfterPoll
OnPolling();
}, isLongRunning: true)
.ContinueWith(task =>
{
var next = TaskAsyncHelper.Empty;
Exception exception = null;
if (task.IsFaulted || task.IsCanceled)
{
if (task.IsCanceled)
{
exception = new OperationCanceledException(Resources.Error_TaskCancelledException);
}
else
{
exception = task.Exception.Unwrap();
}
OnError(exception);
}
else
{
try
{
next = task.Result.ReadAsString(OnChunk).Then(raw => OnMessage(raw));
}
catch (Exception ex)
{
exception = ex;
OnError(exception);
}
}
next.Finally(state =>
{
OnAfterPoll((Exception)state).Then(() => Poll());
},
exception);
});
}
}
public void TryCancel(OperationCanceledException exception) {
_createRequestTcs.TrySetCanceled(exception);
_responseTcs.TrySetCanceled(exception);
_cancellationTokenRegistration.Dispose();
}
private void Done(IAsyncInfo info, AsyncStatus status, bool initial)
{
var error = default(Exception);
var result = default(TResult);
//
// Initial interactions with the IAsyncInfo object. Those could fail, which indicates
// a rogue implementation. Failure is just propagated out.
//
switch (status)
{
case AsyncStatus.Error:
error = info.ErrorCode;
if (error == null)
{
throw new InvalidOperationException("The asynchronous operation failed with a null error code.");
}
break;
case AsyncStatus.Canceled:
error = new OperationCanceledException();
break;
case AsyncStatus.Completed:
if (_getResult != null)
{
result = _getResult(info);
}
break;
default:
if (!initial)
{
throw new InvalidOperationException("The asynchronous operation completed unexpectedly.");
}
_onCompleted(info, (iai, s) => Done(iai, s, false));
return;
}
//
// Close as early as possible, before running continuations which could fail. In case of
// failure above, we don't close out the object in order to allow for debugging of the
// rogue implementation without losing state prematurely. Notice _getResults is merely
// an indirect call to the appropriate GetResults method, which is not supposed to throw.
// Instead, an Error status should be returned.
//
info.Close();
//
// Now we run the continuations, which could take a long time. Failure here is catastrophic
// and under control of the upstream subscriber.
//
if (error != null)
{
_subject.OnError(error);
}
else
{
if (_getResult != null)
{
_subject.OnNext(result);
}
_subject.OnCompleted();
}
}
private void OpenConnection(IConnection connection,
string data,
CancellationToken disconnectToken,
Action initializeCallback,
Action<Exception> errorCallback)
{
// If we're reconnecting add /connect to the url
bool reconnecting = initializeCallback == null;
var callbackInvoker = new ThreadSafeInvoker();
var requestDisposer = new Disposer();
Action initializeInvoke = () =>
{
callbackInvoker.Invoke(initializeCallback);
};
var url = connection.Url + (reconnecting ? "reconnect" : "connect") + GetReceiveQueryString(connection, data);
connection.Trace(TraceLevels.Events, "SSE: GET {0}", url);
HttpClient.Get(url, req =>
{
_request = req;
_request.Accept = "text/event-stream";
connection.PrepareRequest(_request);
}, isLongRunning: true).ContinueWith(task =>
{
if (task.IsFaulted || task.IsCanceled)
{
Exception exception;
if (task.IsCanceled)
{
exception = new OperationCanceledException(Resources.Error_TaskCancelledException);
}
else
{
exception = task.Exception.Unwrap();
}
if (errorCallback != null)
{
callbackInvoker.Invoke((cb, ex) => cb(ex), errorCallback, exception);
}
else if (!_stop && reconnecting)
{
// Only raise the error event if we failed to reconnect
connection.OnError(exception);
Reconnect(connection, data, disconnectToken);
}
requestDisposer.Dispose();
}
else
{
// If the disconnect token is canceled the response to the task doesn't matter.
if (disconnectToken.IsCancellationRequested)
{
return;
}
var response = task.Result;
Stream stream = response.GetStream();
var eventSource = new EventSourceStreamReader(connection, stream);
var esCancellationRegistration = disconnectToken.SafeRegister(state =>
{
_stop = true;
((IRequest)state).Abort();
},
_request);
eventSource.Opened = () =>
{
// This will noop if we're not in the reconnecting state
if (connection.ChangeState(ConnectionState.Reconnecting, ConnectionState.Connected))
{
// Raise the reconnect event if the connection comes back up
connection.OnReconnected();
}
};
eventSource.Message = sseEvent =>
{
if (sseEvent.EventType == EventType.Data)
{
if (sseEvent.Data.Equals("initialized", StringComparison.OrdinalIgnoreCase))
{
return;
}
bool shouldReconnect;
bool disconnected;
TransportHelper.ProcessResponse(connection, sseEvent.Data, out shouldReconnect, out disconnected, initializeInvoke);
if (disconnected)
{
_stop = true;
connection.Disconnect();
}
}
};
eventSource.Closed = exception =>
{
if (exception != null)
{
// Check if the request is aborted
bool isRequestAborted = ExceptionHelper.IsRequestAborted(exception);
if (!isRequestAborted)
{
// Don't raise exceptions if the request was aborted (connection was stopped).
connection.OnError(exception);
}
}
requestDisposer.Dispose();
esCancellationRegistration.Dispose();
response.Dispose();
if (_stop)
{
AbortHandler.CompleteAbort();
}
else if (AbortHandler.TryCompleteAbort())
{
// Abort() was called, so don't reconnect
}
else
{
Reconnect(connection, data, disconnectToken);
}
};
eventSource.Start();
}
});
var requestCancellationRegistration = disconnectToken.SafeRegister(state =>
{
if (state != null)
{
// This will no-op if the request is already finished.
((IRequest)state).Abort();
}
if (errorCallback != null)
{
callbackInvoker.Invoke((cb, token) =>
{
#if !NET35
cb(new OperationCanceledException(Resources.Error_ConnectionCancelled, token));
#else
cb(new OperationCanceledException(Resources.Error_ConnectionCancelled));
#endif
}, errorCallback, disconnectToken);
}
}, _request);
requestDisposer.Set(requestCancellationRegistration);
}
protected override void OperationCanceled(OperationCanceledException ex)
{
WriteLine("Fixing was canceled.", Verbosity.Quiet);
}
public void Dispose()
{
lock (_globalLock)
{
OnFailure = null;
// wake up clients waiting for a stream id (so they can cancel themselves)
_cancellation.Cancel();
Monitor.Pulse(_globalLock);
// cancel pending readers
Exception cancelException = new OperationCanceledException();
for (byte idx = 0; idx < MAX_STREAMID; ++idx)
{
if (!_availableStreamIds.Contains(idx))
{
_instrumentation.ClientTrace(_queryInfos[idx].InstrumentationToken, EventType.Cancellation);
_queryInfos[idx].Exception = cancelException;
_queryInfos[idx].ReadTask.RunSynchronously();
}
}
_logger.Debug("Connection to {0} is being disposed", Endpoint);
_tcpClient.SafeDispose();
//_cancellation.SafeDispose();
}
}
private static void HandleCanceledOperations(CancellationToken cancellationToken,
TaskCompletionSource<HttpResponseMessage> tcs, OperationCanceledException e)
{
// Check if the exception was due to a cancellation. If so, check if the OperationCanceledException is
// related to our CancellationToken. If it was indeed caused due to our cancellation token being
// canceled, set the Task as canceled. Set it to faulted otherwise, since the OperationCanceledException
// is not related to our cancellation token.
if (cancellationToken.IsCancellationRequested && (e.CancellationToken == cancellationToken))
{
tcs.TrySetCanceled();
}
else
{
tcs.TrySetException(e);
}
}
private void CancelAllOperations()
{
if (_receiveAsyncBufferTcs != null)
{
// This exception will be received by OnMessageReceived and won't be exposed
// to user code.
var exception = new OperationCanceledException("Aborted");
_receiveAsyncBufferTcs.TrySetException(exception);
}
if (_webSocketReceiveResultTcs != null)
{
var exception = new WebSocketException(
WebSocketError.InvalidState,
SR.Format(
SR.net_WebSockets_InvalidState_ClosedOrAborted,
"System.Net.WebSockets.InternalClientWebSocket",
"Aborted"));
_webSocketReceiveResultTcs.TrySetException(exception);
}
if (_closeWebSocketReceiveResultTcs != null)
{
var exception = new WebSocketException(
WebSocketError.InvalidState,
SR.Format(
SR.net_WebSockets_InvalidState_ClosedOrAborted,
"System.Net.WebSockets.InternalClientWebSocket",
"Aborted"));
_closeWebSocketReceiveResultTcs.TrySetException(exception);
}
}
private void ResolveTransport(IConnection connection, string data, CancellationToken disconnectToken, TaskCompletionSource<object> tcs, int index)
{
// Pick the current transport
IClientTransport transport = _transports[index];
transport.Start(connection, data, disconnectToken).ContinueWith(task =>
{
if (task.IsFaulted || task.IsCanceled)
{
Exception ex;
if (task.IsCanceled)
{
ex = new OperationCanceledException(Resources.Error_TaskCancelledException);
}
else
{
ex = task.Exception.GetBaseException();
}
connection.Trace(TraceLevels.Events, "Auto: Failed to connect to using transport {0}. {1}", transport.Name, ex);
// If that transport fails to initialize, then fallback.
// If it is that /start request that failed, do not fallback.
var next = index + 1;
if (next < _transports.Count && !(ex is StartException))
{
// Try the next transport
ResolveTransport(connection, data, disconnectToken, tcs, next);
}
else
{
// If there's nothing else to try then just fail
tcs.SetException(ex);
}
}
else
{
// Set the active transport
_transport = transport;
// Complete the process
tcs.SetResult(null);
}
},
TaskContinuationOptions.ExecuteSynchronously);
}
/// <summary>
/// Execute the operation asynchronously.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation that handles processing the result of the command.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">User supplied state.</param>
/// <returns>Task.</returns>
protected override async Task<int?> ExecuteAsync(CommandExecutionToken<OleDbCommand, OleDbParameter> executionToken, CommandImplementationAsync<OleDbCommand> implementation, CancellationToken cancellationToken, object state)
{
if (executionToken == null)
throw new ArgumentNullException("executionToken", "executionToken is null.");
if (implementation == null)
throw new ArgumentNullException("implementation", "implementation is null.");
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
try
{
using (var con = await CreateConnectionAsync(cancellationToken).ConfigureAwait(false))
{
using (var cmd = new OleDbCommand())
{
cmd.Connection = con;
if (DefaultCommandTimeout.HasValue)
cmd.CommandTimeout = (int)DefaultCommandTimeout.Value.TotalSeconds;
cmd.CommandText = executionToken.CommandText;
cmd.CommandType = executionToken.CommandType;
foreach (var param in executionToken.Parameters)
cmd.Parameters.Add(param);
executionToken.ApplyCommandOverrides(cmd);
var rows = await implementation(cmd).ConfigureAwait(false);
executionToken.RaiseCommandExecuted(cmd, rows);
OnExecutionFinished(executionToken, startTime, DateTimeOffset.Now, rows, state);
return rows;
}
}
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert Exception into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionCanceled(executionToken, startTime, DateTimeOffset.Now, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
}
/// <summary>
/// Throws the cancellation exception.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="exception">The exception.</param>
/// <returns>Exception.</returns>
private Exception GetCancellationException(string url, CancellationToken cancellationToken, OperationCanceledException exception)
{
// If the HttpClient's timeout is reached, it will cancel the Task internally
if (!cancellationToken.IsCancellationRequested)
{
var msg = string.Format("Connection to {0} timed out", url);
_logger.Error(msg);
// Throw an HttpException so that the caller doesn't think it was cancelled by user code
return new HttpException(msg, exception) { IsTimedOut = true };
}
return exception;
}
/// <summary>
/// This does a mapping from hr to the exception and also takes care of making default exception in case of classic COM as COMException.
/// and in winrt and marshal APIs as Exception.
/// </summary>
/// <param name="errorCode"></param>
/// <param name="message"></param>
/// <param name="createCOMException"></param>
/// <returns></returns>
internal static Exception GetMappingExceptionForHR(int errorCode, string message, bool createCOMException, bool hasErrorInfo)
{
if (errorCode >= 0)
{
return null;
}
Exception exception = null;
bool shouldDisplayHR = false;
switch (errorCode)
{
case __HResults.COR_E_NOTFINITENUMBER: // NotFiniteNumberException
case __HResults.COR_E_ARITHMETIC:
exception = new ArithmeticException();
break;
case __HResults.COR_E_ARGUMENT:
case unchecked((int)0x800A01C1):
case unchecked((int)0x800A01C2):
case __HResults.CLR_E_BIND_UNRECOGNIZED_IDENTITY_FORMAT:
exception = new ArgumentException();
if (errorCode != __HResults.COR_E_ARGUMENT)
shouldDisplayHR = true;
break;
case __HResults.E_BOUNDS:
case __HResults.COR_E_ARGUMENTOUTOFRANGE:
case __HResults.ERROR_NO_UNICODE_TRANSLATION:
exception = new ArgumentOutOfRangeException();
if (errorCode != __HResults.COR_E_ARGUMENTOUTOFRANGE)
shouldDisplayHR = true;
break;
case __HResults.COR_E_ARRAYTYPEMISMATCH:
exception = new ArrayTypeMismatchException();
break;
case __HResults.COR_E_BADIMAGEFORMAT:
case __HResults.CLDB_E_FILE_OLDVER:
case __HResults.CLDB_E_INDEX_NOTFOUND:
case __HResults.CLDB_E_FILE_CORRUPT:
case __HResults.COR_E_NEWER_RUNTIME:
case __HResults.COR_E_ASSEMBLYEXPECTED:
case __HResults.ERROR_BAD_EXE_FORMAT:
case __HResults.ERROR_EXE_MARKED_INVALID:
case __HResults.CORSEC_E_INVALID_IMAGE_FORMAT:
case __HResults.ERROR_NOACCESS:
case __HResults.ERROR_INVALID_ORDINAL:
case __HResults.ERROR_INVALID_DLL:
case __HResults.ERROR_FILE_CORRUPT:
case __HResults.COR_E_LOADING_REFERENCE_ASSEMBLY:
case __HResults.META_E_BAD_SIGNATURE:
exception = new BadImageFormatException();
// Always show HR for BadImageFormatException
shouldDisplayHR = true;
break;
case __HResults.COR_E_CUSTOMATTRIBUTEFORMAT:
exception = new FormatException();
break; // CustomAttributeFormatException
case __HResults.COR_E_DATAMISALIGNED:
exception = InteropExtensions.CreateDataMisalignedException(message); // TODO: Do we need to add msg here?
break;
case __HResults.COR_E_DIVIDEBYZERO:
case __HResults.CTL_E_DIVISIONBYZERO:
exception = new DivideByZeroException();
if (errorCode != __HResults.COR_E_DIVIDEBYZERO)
shouldDisplayHR = true;
break;
case __HResults.COR_E_DLLNOTFOUND:
#if ENABLE_WINRT
exception = new DllNotFoundException();
#endif
break;
case __HResults.COR_E_DUPLICATEWAITOBJECT:
exception = new ArgumentException();
break; // DuplicateWaitObjectException
case __HResults.COR_E_ENDOFSTREAM:
case unchecked((int)0x800A003E):
exception = new System.IO.EndOfStreamException();
if (errorCode != __HResults.COR_E_ENDOFSTREAM)
shouldDisplayHR = true;
break;
case __HResults.COR_E_TYPEACCESS: // TypeAccessException
case __HResults.COR_E_ENTRYPOINTNOTFOUND:
exception = new TypeLoadException();
break; // EntryPointNotFoundException
case __HResults.COR_E_EXCEPTION:
exception = new Exception();
break;
case __HResults.COR_E_DIRECTORYNOTFOUND:
case __HResults.STG_E_PATHNOTFOUND:
case __HResults.CTL_E_PATHNOTFOUND:
exception = new System.IO.DirectoryNotFoundException();
if (errorCode != __HResults.COR_E_DIRECTORYNOTFOUND)
shouldDisplayHR = true;
break;
case __HResults.COR_E_FILELOAD:
case __HResults.FUSION_E_INVALID_PRIVATE_ASM_LOCATION:
case __HResults.FUSION_E_SIGNATURE_CHECK_FAILED:
case __HResults.FUSION_E_LOADFROM_BLOCKED:
case __HResults.FUSION_E_CACHEFILE_FAILED:
case __HResults.FUSION_E_ASM_MODULE_MISSING:
case __HResults.FUSION_E_INVALID_NAME:
case __HResults.FUSION_E_PRIVATE_ASM_DISALLOWED:
case __HResults.FUSION_E_HOST_GAC_ASM_MISMATCH:
case __HResults.COR_E_MODULE_HASH_CHECK_FAILED:
case __HResults.FUSION_E_REF_DEF_MISMATCH:
case __HResults.SECURITY_E_INCOMPATIBLE_SHARE:
case __HResults.SECURITY_E_INCOMPATIBLE_EVIDENCE:
case __HResults.SECURITY_E_UNVERIFIABLE:
case __HResults.COR_E_FIXUPSINEXE:
case __HResults.ERROR_TOO_MANY_OPEN_FILES:
case __HResults.ERROR_SHARING_VIOLATION:
case __HResults.ERROR_LOCK_VIOLATION:
case __HResults.ERROR_OPEN_FAILED:
case __HResults.ERROR_DISK_CORRUPT:
case __HResults.ERROR_UNRECOGNIZED_VOLUME:
case __HResults.ERROR_DLL_INIT_FAILED:
case __HResults.FUSION_E_CODE_DOWNLOAD_DISABLED:
case __HResults.CORSEC_E_MISSING_STRONGNAME:
case __HResults.MSEE_E_ASSEMBLYLOADINPROGRESS:
case __HResults.ERROR_FILE_INVALID:
exception = new System.IO.FileLoadException();
shouldDisplayHR = true;
break;
case __HResults.COR_E_PATHTOOLONG:
exception = new System.IO.PathTooLongException();
break;
case __HResults.COR_E_IO:
case __HResults.CTL_E_DEVICEIOERROR:
case unchecked((int)0x800A793C):
case unchecked((int)0x800A793D):
exception = new System.IO.IOException();
if (errorCode != __HResults.COR_E_IO)
shouldDisplayHR = true;
break;
case __HResults.ERROR_FILE_NOT_FOUND:
case __HResults.ERROR_MOD_NOT_FOUND:
case __HResults.ERROR_INVALID_NAME:
case __HResults.CTL_E_FILENOTFOUND:
case __HResults.ERROR_BAD_NET_NAME:
case __HResults.ERROR_BAD_NETPATH:
case __HResults.ERROR_NOT_READY:
case __HResults.ERROR_WRONG_TARGET_NAME:
case __HResults.INET_E_UNKNOWN_PROTOCOL:
case __HResults.INET_E_CONNECTION_TIMEOUT:
case __HResults.INET_E_CANNOT_CONNECT:
case __HResults.INET_E_RESOURCE_NOT_FOUND:
case __HResults.INET_E_OBJECT_NOT_FOUND:
case __HResults.INET_E_DOWNLOAD_FAILURE:
case __HResults.INET_E_DATA_NOT_AVAILABLE:
case __HResults.ERROR_DLL_NOT_FOUND:
case __HResults.CLR_E_BIND_ASSEMBLY_VERSION_TOO_LOW:
case __HResults.CLR_E_BIND_ASSEMBLY_PUBLIC_KEY_MISMATCH:
case __HResults.CLR_E_BIND_ASSEMBLY_NOT_FOUND:
exception = new System.IO.FileNotFoundException();
shouldDisplayHR = true;
break;
case __HResults.COR_E_FORMAT:
exception = new FormatException();
break;
case __HResults.COR_E_INDEXOUTOFRANGE:
case unchecked((int)0x800a0009):
exception = new IndexOutOfRangeException();
if (errorCode != __HResults.COR_E_INDEXOUTOFRANGE)
shouldDisplayHR = true;
break;
case __HResults.COR_E_INVALIDCAST:
exception = new InvalidCastException();
break;
case __HResults.COR_E_INVALIDCOMOBJECT:
exception = new InvalidComObjectException();
break;
case __HResults.COR_E_INVALIDOLEVARIANTTYPE:
exception = new InvalidOleVariantTypeException();
break;
case __HResults.COR_E_INVALIDOPERATION:
case __HResults.E_ILLEGAL_STATE_CHANGE:
case __HResults.E_ILLEGAL_METHOD_CALL:
case __HResults.E_ILLEGAL_DELEGATE_ASSIGNMENT:
case __HResults.APPMODEL_ERROR_NO_PACKAGE:
exception = new InvalidOperationException();
if (errorCode != __HResults.COR_E_INVALIDOPERATION)
shouldDisplayHR = true;
break;
case __HResults.COR_E_MARSHALDIRECTIVE:
exception = new MarshalDirectiveException();
break;
case __HResults.COR_E_METHODACCESS: // MethodAccessException
case __HResults.META_E_CA_FRIENDS_SN_REQUIRED: // MethodAccessException
case __HResults.COR_E_FIELDACCESS:
case __HResults.COR_E_MEMBERACCESS:
exception = new MemberAccessException();
if (errorCode != __HResults.COR_E_METHODACCESS)
shouldDisplayHR = true;
break;
case __HResults.COR_E_MISSINGFIELD: // MissingFieldException
case __HResults.COR_E_MISSINGMETHOD: // MissingMethodException
case __HResults.COR_E_MISSINGMEMBER:
case unchecked((int)0x800A01CD):
exception = new MissingMemberException();
break;
case __HResults.COR_E_MISSINGMANIFESTRESOURCE:
exception = new System.Resources.MissingManifestResourceException();
break;
case __HResults.COR_E_NOTSUPPORTED:
case unchecked((int)0x800A01B6):
case unchecked((int)0x800A01BD):
case unchecked((int)0x800A01CA):
case unchecked((int)0x800A01CB):
exception = new NotSupportedException();
if (errorCode != __HResults.COR_E_NOTSUPPORTED)
shouldDisplayHR = true;
break;
case __HResults.COR_E_NULLREFERENCE:
exception = new NullReferenceException();
break;
case __HResults.COR_E_OBJECTDISPOSED:
case __HResults.RO_E_CLOSED:
// No default constructor
exception = new ObjectDisposedException(String.Empty);
break;
case __HResults.COR_E_OPERATIONCANCELED:
#if ENABLE_WINRT
exception = new OperationCanceledException();
#endif
break;
case __HResults.COR_E_OVERFLOW:
case __HResults.CTL_E_OVERFLOW:
exception = new OverflowException();
break;
case __HResults.COR_E_PLATFORMNOTSUPPORTED:
exception = new PlatformNotSupportedException(message);
break;
case __HResults.COR_E_RANK:
exception = new RankException();
break;
case __HResults.COR_E_REFLECTIONTYPELOAD:
#if ENABLE_WINRT
exception = new System.Reflection.ReflectionTypeLoadException(null, null);
#endif
break;
case __HResults.COR_E_SECURITY:
case __HResults.CORSEC_E_INVALID_STRONGNAME:
case __HResults.CTL_E_PERMISSIONDENIED:
case unchecked((int)0x800A01A3):
case __HResults.CORSEC_E_INVALID_PUBLICKEY:
case __HResults.CORSEC_E_SIGNATURE_MISMATCH:
exception = new System.Security.SecurityException();
break;
case __HResults.COR_E_SAFEARRAYRANKMISMATCH:
exception = new SafeArrayRankMismatchException();
break;
case __HResults.COR_E_SAFEARRAYTYPEMISMATCH:
exception = new SafeArrayTypeMismatchException();
break;
case __HResults.COR_E_SERIALIZATION:
exception = new System.Runtime.Serialization.SerializationException(message);
break;
case __HResults.COR_E_SYNCHRONIZATIONLOCK:
exception = new System.Threading.SynchronizationLockException();
break;
case __HResults.COR_E_TARGETINVOCATION:
exception = new System.Reflection.TargetInvocationException(null);
break;
case __HResults.COR_E_TARGETPARAMCOUNT:
exception = new System.Reflection.TargetParameterCountException();
break;
case __HResults.COR_E_TYPEINITIALIZATION:
exception = InteropExtensions.CreateTypeInitializationException(message);
break;
case __HResults.COR_E_TYPELOAD:
case __HResults.RO_E_METADATA_NAME_NOT_FOUND:
case __HResults.CLR_E_BIND_TYPE_NOT_FOUND:
exception = new TypeLoadException();
if (errorCode != __HResults.COR_E_TYPELOAD)
shouldDisplayHR = true;
break;
case __HResults.COR_E_UNAUTHORIZEDACCESS:
case __HResults.CTL_E_PATHFILEACCESSERROR:
case unchecked((int)0x800A014F):
exception = new UnauthorizedAccessException();
shouldDisplayHR = true;
break;
case __HResults.COR_E_VERIFICATION:
exception = new System.Security.VerificationException();
break;
case __HResults.E_NOTIMPL:
exception = new NotImplementedException();
break;
case __HResults.E_OUTOFMEMORY:
case __HResults.CTL_E_OUTOFMEMORY:
case unchecked((int)0x800A7919):
exception = new OutOfMemoryException();
if (errorCode != __HResults.E_OUTOFMEMORY)
shouldDisplayHR = true;
break;
#if ENABLE_WINRT
case __HResults.E_XAMLPARSEFAILED:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.Markup.XamlParseException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
case __HResults.E_ELEMENTNOTAVAILABLE:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.Automation.ElementNotAvailableException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
case __HResults.E_ELEMENTNOTENABLED:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.Automation.ElementNotEnabledException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
case __HResults.E_LAYOUTCYCLE:
exception = ConstructExceptionUsingReflection(
"Windows.UI.Xaml.LayoutCycleException, System.Runtime.WindowsRuntime.UI.Xaml, Version=4.0.0.0",
message);
break;
#endif // ENABLE_WINRT
case __HResults.COR_E_AMBIGUOUSMATCH: // AmbiguousMatchException
case __HResults.COR_E_APPLICATION: // ApplicationException
case __HResults.COR_E_APPDOMAINUNLOADED: // AppDomainUnloadedException
case __HResults.COR_E_CANNOTUNLOADAPPDOMAIN: // CannotUnloadAppDomainException
case __HResults.COR_E_CODECONTRACTFAILED: // ContractException
case __HResults.COR_E_CONTEXTMARSHAL: // ContextMarshalException
case __HResults.CORSEC_E_CRYPTO: // CryptographicException
case __HResults.CORSEC_E_CRYPTO_UNEX_OPER: // CryptographicUnexpectedOperationException
case __HResults.COR_E_EXECUTIONENGINE: // ExecutionEngineException
case __HResults.COR_E_INSUFFICIENTEXECUTIONSTACK: // InsufficientExecutionStackException
case __HResults.COR_E_INVALIDFILTERCRITERIA: // InvalidFilterCriteriaException
case __HResults.COR_E_INVALIDPROGRAM: // InvalidProgramException
case __HResults.COR_E_MULTICASTNOTSUPPORTED: // MulticastNotSupportedException
case __HResults.COR_E_REMOTING: // RemotingException
case __HResults.COR_E_RUNTIMEWRAPPED: // RuntimeWrappedException
case __HResults.COR_E_SERVER: // ServerException
case __HResults.COR_E_STACKOVERFLOW: // StackOverflowException
case __HResults.CTL_E_OUTOFSTACKSPACE: // StackOverflowException
case __HResults.COR_E_SYSTEM: // SystemException
case __HResults.COR_E_TARGET: // TargetException
case __HResults.COR_E_THREADABORTED: // TargetException
case __HResults.COR_E_THREADINTERRUPTED: // ThreadInterruptedException
case __HResults.COR_E_THREADSTATE: // ThreadStateException
case __HResults.COR_E_THREADSTART: // ThreadStartException
case __HResults.COR_E_TYPEUNLOADED: // TypeUnloadedException
case __HResults.CORSEC_E_POLICY_EXCEPTION: // PolicyException
case __HResults.CORSEC_E_NO_EXEC_PERM: // PolicyException
case __HResults.CORSEC_E_MIN_GRANT_FAIL: // PolicyException
case __HResults.CORSEC_E_XMLSYNTAX: // XmlSyntaxException
case __HResults.ISS_E_ALLOC_TOO_LARGE: // IsolatedStorageException
case __HResults.ISS_E_BLOCK_SIZE_TOO_SMALL: // IsolatedStorageException
case __HResults.ISS_E_CALLER: // IsolatedStorageException
case __HResults.ISS_E_CORRUPTED_STORE_FILE: // IsolatedStorageException
case __HResults.ISS_E_CREATE_DIR: // IsolatedStorageException
case __HResults.ISS_E_CREATE_MUTEX: // IsolatedStorageException
case __HResults.ISS_E_DEPRECATE: // IsolatedStorageException
case __HResults.ISS_E_FILE_NOT_MAPPED: // IsolatedStorageException
case __HResults.ISS_E_FILE_WRITE: // IsolatedStorageException
case __HResults.ISS_E_GET_FILE_SIZE: // IsolatedStorageException
case __HResults.ISS_E_ISOSTORE: // IsolatedStorageException
case __HResults.ISS_E_LOCK_FAILED: // IsolatedStorageException
case __HResults.ISS_E_MACHINE: // IsolatedStorageException
case __HResults.ISS_E_MACHINE_DACL: // IsolatedStorageException
case __HResults.ISS_E_MAP_VIEW_OF_FILE: // IsolatedStorageException
case __HResults.ISS_E_OPEN_FILE_MAPPING: // IsolatedStorageException
case __HResults.ISS_E_OPEN_STORE_FILE: // IsolatedStorageException
case __HResults.ISS_E_PATH_LENGTH: // IsolatedStorageException
case __HResults.ISS_E_SET_FILE_POINTER: // IsolatedStorageException
case __HResults.ISS_E_STORE_NOT_OPEN: // IsolatedStorageException
case __HResults.ISS_E_STORE_VERSION: // IsolatedStorageException
case __HResults.ISS_E_TABLE_ROW_NOT_FOUND: // IsolatedStorageException
case __HResults.ISS_E_USAGE_WILL_EXCEED_QUOTA: // IsolatedStorageException
case __HResults.E_FAIL:
default:
break;
}
if (exception == null)
{
if (createCOMException)
{
exception = new COMException();
if (errorCode != __HResults.E_FAIL)
shouldDisplayHR = true;
}
else
{
exception = new Exception();
if (errorCode != __HResults.COR_E_EXCEPTION)
shouldDisplayHR = true;
}
}
bool shouldConstructMessage = false;
if (hasErrorInfo)
{
// If there is a IErrorInfo/IRestrictedErrorInfo, only construct a new error message if
// the message is not available and do not use the shouldDisplayHR setting
if (message == null)
shouldConstructMessage = true;
}
else
{
// If there is no IErrorInfo, use the shouldDisplayHR setting from the big switch/case above
shouldConstructMessage = shouldDisplayHR;
}
if (shouldConstructMessage)
{
//
// Append the HR into error message, just in case the app wants to look at the HR in
// message to determine behavior. We didn't expose HResult property until v4.5 and
// GetHRFromException has side effects so probably Message was their only choice.
// This behavior is probably not exactly the same as in desktop but it is fine to append
// more message at the end. In any case, having the HR in the error message are helpful
// to developers.
// This makes sure:
// 1. We always have a HR 0xNNNNNNNN in the message
// 2. Put in a nice "Exception thrown from HRESULT" message if we can
// 3. Wrap it in () if there is an existing message
//
// TODO: Add Symbolic Name into Messaage, convert 0x80020006 to DISP_E_UNKNOWNNAME
string hrMessage = String.Format("{0} 0x{1}", SR.Excep_FromHResult, errorCode.LowLevelToString());
message = ExternalInterop.GetMessage(errorCode);
// Always make sure we have at least the HRESULT part in retail build or when the message
// is empty.
if (message == null)
message = hrMessage;
else
message = message + " (" + hrMessage + ")";
}
if (message != null)
{
// Set message explicitly rather than calling constructor because certain ctors would append a
// prefix to the message and that is not what we want
InteropExtensions.SetExceptionMessage(exception, message);
}
InteropExtensions.SetExceptionErrorCode(exception, errorCode);
return exception;
}
public object WaitResult(int timeout = -1, Func <bool> canceled = null)
{
if (disposed)
{
throw new ObjectDisposedException("InvokeCommand");
}
Exception ex = null;
long msec = 0;
Stopwatch sw = Stopwatch.StartNew();
bool result = false;
do
{
result = waitEvent.WaitOne(300);
if (result)
{
logger.Verb("Request completed");
break;
}
if (canceled?.Invoke() ?? false)
{
ex = new OperationCanceledException();
logger.Verb("Request canceled");
break;
}
if (timeout > 0)
{
msec = sw.ElapsedMilliseconds;
if (msec > timeout)
{
ex = new TimeoutException();
logger.Verb("Request timed out: " + msec + " " + timeout);
break;
}
}
logger.Verb("Waiting for result...");
} while (!result);
if (exception == null)
{
exception = ex;
}
if (exception != null)
{
throw exception;
}
if (response == null)
{
var message = "Request dropped";
if (request != null)
{
message = "Request dropped: " + "\"" + request.ToString() + "\"";
}
throw new Exception(message);
}
return(response);
}
public void TestWorkCancelledException()
{
// prepare workAction to throw exception
Exception currentException = null;
Func<Task> workAction = () => { throw currentException; };
// initialize worker
using (var worker = new MockWorker(workAction))
{
var finishedEvent = new AutoResetEvent(false);
worker.OnWorkFinished += () => { finishedEvent.Set(); };
bool wasError;
worker.OnWorkError += e => wasError = true;
// start worker
worker.Start();
// throw OperationCanceledException
wasError = false;
currentException = new OperationCanceledException();
worker.NotifyWork();
// verify work finished
Assert.IsTrue(finishedEvent.WaitOne(1000));
Assert.IsFalse(wasError);
// throw Exception
wasError = false;
currentException = new Exception();
worker.NotifyWork();
// verify work errored
Assert.IsTrue(finishedEvent.WaitOne());
Assert.IsTrue(wasError);
// throw AggregateException of all OperationCanceledException
wasError = false;
currentException = new AggregateException(new OperationCanceledException(), new OperationCanceledException());
worker.NotifyWork();
// verify work finished
Assert.IsTrue(finishedEvent.WaitOne());
Assert.IsFalse(wasError);
// throw AggregateException of some OperationCanceledException
wasError = false;
currentException = new AggregateException(new OperationCanceledException(), new Exception());
worker.NotifyWork();
// verify work errored
Assert.IsTrue(finishedEvent.WaitOne());
Assert.IsTrue(wasError);
}
}
private static void HandleOperationCanceledException(HttpActionExecutedContext ctx, OperationCanceledException e)
{
ctx.Response = new HttpResponseMessage
{
StatusCode = HttpStatusCode.RequestTimeout
};
Stopwatch sp = ctx.Request.Properties["timer"] as Stopwatch;
var elapsedMilliseconds = sp == null ? -1 : sp.ElapsedMilliseconds;
SerializeError(ctx, new
{
Url = ctx.Request.RequestUri.PathAndQuery,
Error = string.Format("Request was canceled by the server due to timeout after {0}ms", elapsedMilliseconds.ToString("#,#;;0", CultureInfo.InvariantCulture)),
e.Message
});
}
/// <summary>
/// execute as an asynchronous operation.
/// </summary>
/// <param name="executionToken">The execution token.</param>
/// <param name="implementation">The implementation.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="state">The state.</param>
/// <returns>Task.</returns>
/// <exception cref="ArgumentNullException">
/// executionToken;executionToken is null.
/// or
/// implementation;implementation is null.
/// </exception>
protected override async Task <int?> ExecuteAsync(CommandExecutionToken <OleDbCommand, OleDbParameter> executionToken, CommandImplementationAsync <OleDbCommand> implementation, CancellationToken cancellationToken, object?state)
{
if (executionToken == null)
{
throw new ArgumentNullException(nameof(executionToken), $"{nameof(executionToken)} is null.");
}
if (implementation == null)
{
throw new ArgumentNullException(nameof(implementation), $"{nameof(implementation)} is null.");
}
var currentToken = executionToken as AccessCommandExecutionToken;
if (currentToken == null)
{
throw new ArgumentNullException(nameof(executionToken), "only AccessCommandExecutionToken is supported.");
}
var startTime = DateTimeOffset.Now;
OnExecutionStarted(executionToken, startTime, state);
try
{
int?rows = null;
while (currentToken != null)
{
OnExecutionStarted(currentToken, startTime, state);
using (var cmd = new OleDbCommand())
{
cmd.Connection = m_Connection;
cmd.Transaction = m_Transaction;
currentToken.PopulateCommand(cmd, DefaultCommandTimeout);
if (currentToken.ExecutionMode == AccessCommandExecutionMode.Materializer)
{
rows = await implementation(cmd).ConfigureAwait(false);
}
else if (currentToken.ExecutionMode == AccessCommandExecutionMode.ExecuteScalarAndForward)
{
if (currentToken.ForwardResult == null)
{
throw new InvalidOperationException("currentToken.ExecutionMode is ExecuteScalarAndForward, but currentToken.ForwardResult is null.");
}
currentToken.ForwardResult(await cmd.ExecuteScalarAsync().ConfigureAwait(false));
}
else
{
rows = await cmd.ExecuteNonQueryAsync().ConfigureAwait(false);
}
executionToken.RaiseCommandExecuted(cmd, rows);
OnExecutionFinished(currentToken, startTime, DateTimeOffset.Now, rows, state);
}
currentToken = currentToken.NextCommand;
}
return(rows);
}
catch (Exception ex)
{
if (cancellationToken.IsCancellationRequested) //convert AccessException into a OperationCanceledException
{
var ex2 = new OperationCanceledException("Operation was canceled.", ex, cancellationToken);
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex2, state);
throw ex2;
}
else
{
OnExecutionError(executionToken, startTime, DateTimeOffset.Now, ex, state);
throw;
}
}
}
/// <summary>
/// Throws the cancellation exception.
/// </summary>
/// <param name="options">The options.</param>
/// <param name="client">The client.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="exception">The exception.</param>
/// <returns>Exception.</returns>
private Exception GetCancellationException(HttpRequestOptions options, HttpClientInfo client, CancellationToken cancellationToken, OperationCanceledException exception)
{
// If the HttpClient's timeout is reached, it will cancel the Task internally
if (!cancellationToken.IsCancellationRequested)
{
var msg = string.Format("Connection to {0} timed out", options.Url);
if (options.LogErrors)
{
_logger.Error(msg);
}
client.LastTimeout = DateTime.UtcNow;
// Throw an HttpException so that the caller doesn't think it was cancelled by user code
return(new HttpException(msg, exception)
{
IsTimedOut = true
});
}
return(exception);
}
/// <summary>
/// Throws the cancellation exception.
/// </summary>
/// <param name="options">The options.</param>
/// <param name="client">The client.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="exception">The exception.</param>
/// <returns>Exception.</returns>
private Exception GetCancellationException(HttpRequestOptions options, HttpClientInfo client, CancellationToken cancellationToken, OperationCanceledException exception)
{
// If the HttpClient's timeout is reached, it will cancel the Task internally
if (!cancellationToken.IsCancellationRequested)
{
var msg = string.Format("Connection to {0} timed out", options.Url);
if (options.LogErrors)
{
_logger.Error(msg);
}
client.LastTimeout = DateTime.UtcNow;
// Throw an HttpException so that the caller doesn't think it was cancelled by user code
return new HttpException(msg, exception)
{
IsTimedOut = true
};
}
return exception;
}
/// <summary>
/// Initializes a new instance of the <see cref="SpotifyHttpRequestCanceledException" /> class.
/// </summary>
/// <param name="operationCanceledException">The operation canceled exception.</param>
public SpotifyHttpRequestCanceledException(OperationCanceledException operationCanceledException)
: base("The HTTP request has been canceled from an internal cancellation token.", operationCanceledException)
{
}
