private LockFile AcquireSessionLock(MonitoringSession session, string methodName = "")
{
string sessionFilePath = (session.EndDate != DateTime.MinValue.ToUniversalTime()) ? GetCpuMonitoringPath(MonitoringSessionDirectories.Completed) : GetCpuMonitoringPath(MonitoringSessionDirectories.Active);
string lockFilePath = sessionFilePath + ".lock";
LockFile _lockFile = new LockFile(lockFilePath);
int loopCount = 0;
int lognum = 1;
int maximumWaitTimeInSeconds = 15 * 60;
while (!_lockFile.Lock($"AcquireSessionLock by {methodName} on {Environment.MachineName}") && loopCount <= maximumWaitTimeInSeconds)
{
++loopCount;
if (loopCount > lognum * 120)
{
++lognum;
Logger.LogCpuMonitoringVerboseEvent($"Waiting to acquire the lock on session file , loop {lognum}", session.SessionId);
}
Thread.Sleep(1000);
}
if (loopCount == maximumWaitTimeInSeconds)
{
Logger.LogCpuMonitoringVerboseEvent($"Deleting the lock file as it seems to be in an orphaned stage", session.SessionId);
_lockFile.Release();
return(null);
}
return(_lockFile);
}
private void updateFETCH_HEAD(FetchResult result)
{
LockFile @lock = new LockFile(new FileInfo(Path.Combine(_transport.Local.Directory.FullName, "FETCH_HEAD")));
try
{
if (@lock.Lock())
{
StreamWriter w = new StreamWriter(@lock.GetOutputStream());
try
{
foreach (FetchHeadRecord h in _fetchHeadUpdates)
{
h.Write(w);
result.Add(h);
}
}
finally
{
w.Close();
}
@lock.Commit();
}
}
finally
{
@lock.Unlock();
}
}
private bool TryGetLockIfSingleton(out bool acquired)
{
acquired = false;
bool isSingleton = JobSettings.IsSingleton;
if (_isSingleton == null || _isSingleton.Value != isSingleton)
{
if (_isSingleton == null)
{
LogInformation("WebJob singleton setting is {0}", isSingleton);
}
else
{
LogInformation("WebJob singleton setting changed from {0} to {1}", _isSingleton.Value, isSingleton);
}
_isSingleton = isSingleton;
}
if (!isSingleton)
{
return(true);
}
if (_singletonLock.Lock("Acquiring continuous WebJob singleton lock"))
{
acquired = true;
LogInformation("WebJob singleton lock is acquired");
return(true);
}
UpdateStatusIfChanged(ContinuousJobStatus.InactiveInstance);
return(false);
}
public void AsyncLock_BasicTest()
{
for (int i = 0; i < 2; i++)
{
// Acquire
Assert.Equal(false, _lockFile.IsHeld);
Assert.Equal(true, _lockFile.Lock());
// Test
Assert.Equal(true, _lockFile.IsHeld);
Assert.Equal(false, _lockFile.Lock());
// Release
_lockFile.Release();
Assert.Equal(false, _lockFile.IsHeld);
}
}
public void StartJobRun(TriggeredJob triggeredJob, JobSettings jobSettings, string trigger, Action <string, string> reportAction)
{
JobSettings = jobSettings;
if (Settings.IsWebJobsStopped())
{
throw new WebJobsStoppedException();
}
if (!_lockFile.Lock())
{
throw new ConflictException();
}
TriggeredJobRunLogger logger = TriggeredJobRunLogger.LogNewRun(triggeredJob, trigger, Environment, TraceFactory, Settings);
Debug.Assert(logger != null);
try
{
if (_currentRunningJobWaitHandle != null)
{
_currentRunningJobWaitHandle.Dispose();
_currentRunningJobWaitHandle = null;
}
_currentRunningJobWaitHandle = new ManualResetEvent(false);
var tracer = TraceFactory.GetTracer();
var step = tracer.Step("Run {0} {1}", triggeredJob.JobType, triggeredJob.Name);
ThreadPool.QueueUserWorkItem(_ =>
{
try
{
InitializeJobInstance(triggeredJob, logger);
RunJobInstance(triggeredJob, logger, logger.Id, trigger, tracer);
}
catch (Exception ex)
{
logger.LogError("WebJob run failed due to: " + ex);
}
finally
{
step.Dispose();
logger.ReportEndRun();
_lockFile.Release();
reportAction(triggeredJob.Name, logger.Id);
_currentRunningJobWaitHandle.Set();
}
});
}
catch (Exception ex)
{
logger.LogError("Failed to start job due to: " + ex);
_lockFile.Release();
throw;
}
}
public void tryRenameWhenLocked(string toLock, string fromName,
string toName, string headPointsTo)
{
// setup
writeSymref(Constants.HEAD, headPointsTo);
ObjectId oldfromId = db.Resolve(fromName);
ObjectId oldHeadId = db.Resolve(Constants.HEAD);
writeReflog(db, oldfromId, oldfromId, "Just a message",
fromName);
IList <ReflogReader.Entry> oldFromLog = db
.ReflogReader(fromName).getReverseEntries();
IList <ReflogReader.Entry> oldHeadLog = oldHeadId != null?db
.ReflogReader(Constants.HEAD).getReverseEntries() : null;
Assert.IsTrue(new FileInfo(Path.Combine(db.Directory.FullName, "logs/" + fromName)).Exists, "internal check, we have a log");
// "someone" has branch X locked
var lockFile = new LockFile(new FileInfo(Path.Combine(db.Directory.FullName, toLock)));
try
{
Assert.IsTrue(lockFile.Lock());
// Now this is our test
RefRename renameRef = db.RenameRef(fromName, toName);
RefUpdate.RefUpdateResult result = renameRef.rename();
Assert.AreEqual(RefUpdate.RefUpdateResult.LOCK_FAILURE, result);
// Check that the involved refs are the same despite the failure
assertExists(false, toName);
if (!toLock.Equals(toName))
{
assertExists(false, toName + ".lock");
}
assertExists(true, toLock + ".lock");
if (!toLock.Equals(fromName))
{
assertExists(false, "logs/" + fromName + ".lock");
}
assertExists(false, "logs/" + toName + ".lock");
Assert.AreEqual(oldHeadId, db.Resolve(Constants.HEAD));
Assert.AreEqual(oldfromId, db.Resolve(fromName));
Assert.IsNull(db.Resolve(toName));
Assert.AreEqual(oldFromLog.ToString(), db.ReflogReader(fromName)
.getReverseEntries().ToString());
if (oldHeadId != null)
{
Assert.AreEqual(oldHeadLog.ToString(), db.ReflogReader(Constants.HEAD)
.getReverseEntries().ToString());
}
}
finally
{
lockFile.Unlock();
}
}
// Locking
private bool LaunchNormally()
{
LockResult result = lockFile.Lock();
if (result is LockResult.HasProcess info)
{
if (!RestoreProcess(info.Process, WindowRestoreMessage) && FormMessage.Error("TweetDuck is Already Running", "Another instance of TweetDuck is already running.\nDo you want to close it?", FormMessage.Yes, FormMessage.No))
{
if (!CloseProcess(info.Process))
{
FormMessage.Error("TweetDuck Has Failed :(", "Could not close the other process.", FormMessage.OK);
return(false);
}
info.Dispose();
result = lockFile.Lock();
}
else
{
return(false);
}
}
if (result is LockResult.Fail fail)
{
ShowGenericException(fail);
return(false);
}
else if (result != LockResult.Success)
{
FormMessage.Error("TweetDuck Has Failed :(", "An unknown error occurred accessing the data folder. Please, make sure TweetDuck is not already running. If the problem persists, try restarting your system.", FormMessage.OK);
return(false);
}
return(true);
}
/// <summary>Try to establish an update lock on the cache file.</summary>
/// <remarks>Try to establish an update lock on the cache file.</remarks>
/// <returns>
/// true if the lock is now held by the caller; false if it is held
/// by someone else.
/// </returns>
/// <exception cref="System.IO.IOException">
/// the output file could not be created. The caller does not
/// hold the lock.
/// </exception>
public virtual bool Lock()
{
if (liveFile == null)
{
throw new IOException(JGitText.Get().dirCacheDoesNotHaveABackingFile);
}
LockFile tmp = new LockFile(liveFile, fs);
if (tmp.Lock())
{
tmp.SetNeedStatInformation(true);
myLock = tmp;
return(true);
}
return(false);
}
/// <summary>
/// Try to establish an update lock on the cache file.
/// </summary>
/// <returns>
/// True if the lock is now held by the caller; false if it is held
/// by someone else.
/// </returns>
/// <exception cref="IOException">
/// The output file could not be created. The caller does not
/// hold the lock.
/// </exception>
public bool Lock()
{
if (_liveFile == null)
{
throw new IOException("DirCache does not have a backing file");
}
_myLock = new LockFile(_liveFile);
if (_myLock.Lock())
{
_myLock.NeedStatInformation = true;
return(true);
}
return(false);
}
private bool TryGetLockIfSingleton()
{
bool isSingleton = _jobSettings.GetSetting("is_singleton", defaultValue: false);
if (!isSingleton)
{
return(true);
}
if (_singletonLock.Lock())
{
return(true);
}
_continuousJobLogger.ReportStatus(ContinuousJobStatus.InactiveInstance);
return(false);
}
private bool TryGetLockIfSingleton()
{
bool isSingleton = JobSettings.IsSingleton;
if (!isSingleton)
{
return(true);
}
if (_singletonLock.Lock())
{
return(true);
}
UpdateStatusIfChanged(ContinuousJobStatus.InactiveInstance);
return(false);
}
private void updateFETCH_HEAD(FetchResult result)
{
using (LockFile @lock = new LockFile(PathUtil.CombineFilePath(_transport.Local.Directory, "FETCH_HEAD")))
{
if (@lock.Lock())
{
using (StreamWriter w = new StreamWriter(@lock.GetOutputStream()))
{
foreach (FetchHeadRecord h in _fetchHeadUpdates)
{
h.Write(w);
result.Add(h);
}
}
@lock.Commit();
}
}
}
protected override void writeFile(string file, byte[] content)
{
FileInfo p = PathUtil.CombineFilePath(_db.Directory, file);
LockFile lck = new LockFile(p);
if (!lck.Lock())
{
throw new ObjectWritingException("Can't write " + p);
}
try {
lck.Write(content);
}
catch (IOException) {
throw new ObjectWritingException("Can't write " + p);
}
if (!lck.Commit())
{
throw new ObjectWritingException("Can't write " + p);
}
}
protected internal override void WriteFile(string file, byte[] content)
{
FilePath p = new FilePath(_db.Directory, file);
LockFile lck = new LockFile(p, FS.DETECTED);
if (!lck.Lock())
{
throw new ObjectWritingException("Can't write " + p);
}
try {
lck.Write(content);
}
catch (IOException) {
throw new ObjectWritingException("Can't write " + p);
}
if (!lck.Commit())
{
throw new ObjectWritingException("Can't write " + p);
}
}
public void StartJobRun(TriggeredJob triggeredJob)
{
if (Settings.IsWebJobsStopped())
{
throw new WebJobsStoppedException();
}
if (!_lockFile.Lock())
{
throw new ConflictException();
}
TriggeredJobRunLogger logger = TriggeredJobRunLogger.LogNewRun(triggeredJob, Environment, TraceFactory, Settings);
Debug.Assert(logger != null);
try
{
InitializeJobInstance(triggeredJob, logger);
ThreadPool.QueueUserWorkItem(_ =>
{
try
{
RunJobInstance(triggeredJob, logger, logger.Id);
}
finally
{
logger.ReportEndRun();
_lockFile.Release();
}
});
}
catch (Exception ex)
{
logger.LogError("Failed to start job due to: " + ex);
_lockFile.Release();
throw;
}
}
public void testUpdateRefLockFailureLocked()
{
ObjectId opid = db.Resolve("refs/heads/master");
ObjectId pid = db.Resolve("refs/heads/master^");
RefUpdate updateRef = db.UpdateRef("refs/heads/master");
updateRef.NewObjectId = pid;
var lockFile1 = new LockFile(new FileInfo(Path.Combine(db.Directory.FullName, "refs/heads/master")));
try
{
Assert.IsTrue(lockFile1.Lock()); // precondition to test
RefUpdate.RefUpdateResult update = updateRef.update();
Assert.AreEqual(RefUpdate.RefUpdateResult.LOCK_FAILURE, update);
Assert.AreEqual(opid, db.Resolve("refs/heads/master"));
var lockFile2 = new LockFile(new FileInfo(Path.Combine(db.Directory.FullName, "refs/heads/master")));
Assert.IsFalse(lockFile2.Lock()); // was locked, still is
}
finally
{
lockFile1.Unlock();
}
}
/// <exception cref="System.IO.IOException"></exception>
private void UpdateFETCH_HEAD(FetchResult result)
{
FilePath meta = transport.local.Directory;
if (meta == null)
{
return;
}
LockFile Lock = new LockFile(new FilePath(meta, "FETCH_HEAD"), transport.local.FileSystem
);
try
{
if (Lock.Lock())
{
TextWriter w = new OutputStreamWriter(Lock.GetOutputStream());
try
{
foreach (FetchHeadRecord h in fetchHeadUpdates)
{
h.Write(w);
result.Add(h);
}
}
finally
{
w.Close();
}
Lock.Commit();
}
}
finally
{
Lock.Unlock();
}
}
/**
* Try to establish an update lock on the cache file.
*
* @return true if the lock is now held by the caller; false if it is held
* by someone else.
* @
* the output file could not be created. The caller does not
* hold the lock.
*/
public bool Lock()
{
if (liveFile == null)
throw new IOException("DirCache does not have a backing file");
LockFile tmp = new LockFile(liveFile);
if (tmp.Lock())
{
tmp.NeedStatInformation=true;
myLock = tmp;
return true;
}
return false;
}
/// <summary>
/// Try to establish an update lock on the cache file.
/// </summary>
/// <returns>
/// True if the lock is now held by the caller; false if it is held
/// by someone else.
/// </returns>
/// <exception cref="IOException">
/// The output file could not be created. The caller does not
/// hold the lock.
/// </exception>
public bool Lock()
{
if (_liveFile == null)
{
throw new IOException("DirCache does not have a backing file");
}
_myLock = new LockFile(_liveFile);
if (_myLock.Lock())
{
_myLock.NeedStatInformation = true;
return true;
}
return false;
}
private void updateFETCH_HEAD(FetchResult result)
{
using (LockFile @lock = new LockFile(PathUtil.CombineFilePath(_transport.Local.Directory, "FETCH_HEAD")))
{
if (@lock.Lock())
{
using (StreamWriter w = new StreamWriter(@lock.GetOutputStream()))
{
foreach (FetchHeadRecord h in _fetchHeadUpdates)
{
h.Write(w);
result.Add(h);
}
}
@lock.Commit();
}
}
}
public void testUpdateRefLockFailureLocked()
{
ObjectId opid = db.Resolve("refs/heads/master");
ObjectId pid = db.Resolve("refs/heads/master^");
RefUpdate updateRef = db.UpdateRef("refs/heads/master");
updateRef.NewObjectId = pid;
var lockFile1 = new LockFile(new FileInfo(Path.Combine(db.Directory.FullName, "refs/heads/master")));
try
{
Assert.IsTrue(lockFile1.Lock()); // precondition to test
RefUpdate.RefUpdateResult update = updateRef.update();
Assert.AreEqual(RefUpdate.RefUpdateResult.LOCK_FAILURE, update);
Assert.AreEqual(opid, db.Resolve("refs/heads/master"));
var lockFile2 = new LockFile(new FileInfo(Path.Combine(db.Directory.FullName, "refs/heads/master")));
Assert.IsFalse(lockFile2.Lock()); // was locked, still is
}
finally
{
lockFile1.Unlock();
}
}
public void tryRenameWhenLocked(string toLock, string fromName,
string toName, string headPointsTo)
{
// setup
writeSymref(Constants.HEAD, headPointsTo);
ObjectId oldfromId = db.Resolve(fromName);
ObjectId oldHeadId = db.Resolve(Constants.HEAD);
writeReflog(db, oldfromId, oldfromId, "Just a message",
fromName);
IList<ReflogReader.Entry> oldFromLog = db
.ReflogReader(fromName).getReverseEntries();
IList<ReflogReader.Entry> oldHeadLog = oldHeadId != null ? db
.ReflogReader(Constants.HEAD).getReverseEntries() : null;
Assert.IsTrue(new FileInfo(Path.Combine(db.Directory.FullName, "logs/" + fromName)).Exists, "internal check, we have a log");
// "someone" has branch X locked
var lockFile = new LockFile(new FileInfo(Path.Combine(db.Directory.FullName, toLock)));
try
{
Assert.IsTrue(lockFile.Lock());
// Now this is our test
RefRename renameRef = db.RenameRef(fromName, toName);
RefUpdate.RefUpdateResult result = renameRef.rename();
Assert.AreEqual(RefUpdate.RefUpdateResult.LOCK_FAILURE, result);
// Check that the involved refs are the same despite the failure
assertExists(false, toName);
if (!toLock.Equals(toName))
assertExists(false, toName + ".lock");
assertExists(true, toLock + ".lock");
if (!toLock.Equals(fromName))
assertExists(false, "logs/" + fromName + ".lock");
assertExists(false, "logs/" + toName + ".lock");
Assert.AreEqual(oldHeadId, db.Resolve(Constants.HEAD));
Assert.AreEqual(oldfromId, db.Resolve(fromName));
Assert.IsNull(db.Resolve(toName));
Assert.AreEqual(oldFromLog.ToString(), db.ReflogReader(fromName)
.getReverseEntries().ToString());
if (oldHeadId != null)
Assert.AreEqual(oldHeadLog.ToString(), db.ReflogReader(Constants.HEAD)
.getReverseEntries().ToString());
}
finally
{
lockFile.Unlock();
}
}
private void updateFETCH_HEAD(FetchResult result)
{
LockFile @lock = new LockFile(new FileInfo(Path.Combine(_transport.Local.Directory.FullName, "FETCH_HEAD")));
try
{
if (@lock.Lock())
{
StreamWriter w = new StreamWriter(@lock.GetOutputStream());
try
{
foreach (FetchHeadRecord h in _fetchHeadUpdates)
{
h.Write(w);
result.Add(h);
}
}
finally
{
w.Close();
}
@lock.Commit();
}
}
finally
{
@lock.Unlock();
}
}