public void BinaryData_Rollback()
{
string text = "Lorem ipsum...";
File file = new File(this.TestRoot);
var bin = new BinaryData();
bin.FileName = "1.txt";
bin.SetStream(Tools.GetStreamFromString(text));
file.Binary = bin;
file.Save();
int id = file.Id;
file = Node.Load <File>(id);
TransactionScope.Begin();
try
{
// Save binary
file.Binary = null;
file.Save();
}
finally
{
// Rollback
TransactionScope.Rollback();
}
file = Node.Load <File>(id);
Assert.IsNotNull(file.Binary, "#1");
Assert.IsTrue(file.Binary.Size > 0, "#2");
Assert.IsTrue(Tools.GetStreamString(file.Binary.GetStream()) == text, "#3");
}
/// <summary>
/// Marks orphaned file records (the ones that do not have a referencing binary record anymore) as Deleted.
/// </summary>
public void CleanupFilesSetDeleteFlag()
{
var isLocalTransaction = false;
if (!TransactionScope.IsActive)
{
TransactionScope.Begin();
isLocalTransaction = true;
}
try
{
using (var proc = new SqlProcedure {
CommandText = CleanupFileSetIsdeletedScript, CommandType = CommandType.Text
})
{
proc.CommandType = CommandType.Text;
proc.ExecuteNonQuery();
}
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Commit();
}
}
catch (Exception ex)
{
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
}
throw new DataException("Error during setting deleted flag on files.", ex);
}
}
private static void RegisterSchema(SchemaEditor origSchema, SchemaEditor newSchema, SchemaWriter schemaWriter)
{
using (var op = SnTrace.Database.StartOperation("Write storage schema modifications."))
{
// Ensure transaction encapsulation
bool isLocalTransaction = !TransactionScope.IsActive;
if (isLocalTransaction)
{
TransactionScope.Begin();
}
try
{
List <PropertySet> modifiedPropertySets = new List <PropertySet>();
schemaWriter.Open();
WriteSchemaModifications(origSchema, newSchema, schemaWriter, modifiedPropertySets);
foreach (PropertySet modifiedPropertySet in modifiedPropertySets)
{
NodeTypeDependency.FireChanged(modifiedPropertySet.Id);
}
schemaWriter.Close();
if (isLocalTransaction)
{
TransactionScope.Commit();
}
ActiveSchema.Reset();
op.Successful = true;
}
catch (Exception ex)
{
SnLog.WriteException(ex, null, EventId.RepositoryRuntime);
throw new SchemaEditorCommandException("Error during schema registration.", ex);
}
finally
{
IDisposable unmanagedWriter = schemaWriter as IDisposable;
if (unmanagedWriter != null)
{
unmanagedWriter.Dispose();
}
try
{
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
}
}
catch (Exception ex2)
{
// This catch block will handle any errors that may have occurred
// on the server that would cause the rollback to fail, such as
// a closed connection (MSDN).
const string msg = "Error during schema transaction rollback.";
SnLog.WriteException(ex2, msg, EventId.RepositoryRuntime);
throw new SchemaEditorCommandException(msg, ex2);
}
}
}
}
public void TransactionScope_IsActive()
{
Test(() =>
{
TransactionScope.Begin();
Assert.AreEqual(true, TransactionScope.IsActive);
TransactionScope.Rollback();
});
}
public void TransactionScope_IsolationLevel_ValueTest1()
{
Test(() =>
{
TransactionScope.Begin(IsolationLevel.Serializable);
Assert.AreEqual(IsolationLevel.Serializable, TransactionScope.IsolationLevel);
TransactionScope.Rollback();
});
}
public void TransactionScope_IsolationLevel()
{
Test(() =>
{
TransactionScope.Begin();
Assert.AreEqual(IsolationLevel.ReadCommitted, TransactionScope.IsolationLevel);
TransactionScope.Rollback();
});
}
/// <summary>
/// Finalizes a chunked save operation.
/// </summary>
/// <param name="versionId">Content version id.</param>
/// <param name="propertyTypeId">Binary property type id.</param>
/// <param name="fileId">File identifier.</param>
/// <param name="fullSize">Full size (stream length) of the binary value.</param>
/// <param name="source">Binary data containing metadata (e.g. content type).</param>
public void CommitChunk(int versionId, int propertyTypeId, int fileId, long fullSize, BinaryDataValue source = null)
{
// start a new transaction here if needed
var isLocalTransaction = !TransactionScope.IsActive;
if (isLocalTransaction)
{
TransactionScope.Begin();
}
try
{
// commit the process: set the final full size and checksum
using (var cmd = new SqlProcedure {
CommandText = CommitChunkScript, CommandType = CommandType.Text
})
{
cmd.Parameters.Add("@FileId", SqlDbType.Int).Value = fileId;
cmd.Parameters.Add("@VersionId", SqlDbType.Int).Value = versionId;
cmd.Parameters.Add("@PropertyTypeId", SqlDbType.Int).Value = propertyTypeId;
cmd.Parameters.Add("@Size", SqlDbType.BigInt).Value = fullSize;
cmd.Parameters.Add("@Checksum", SqlDbType.VarChar, 200).Value = DBNull.Value;
cmd.Parameters.Add("@ContentType", SqlDbType.NVarChar, 50).Value = source != null ? source.ContentType : string.Empty;
cmd.Parameters.Add("@FileNameWithoutExtension", SqlDbType.NVarChar, 450).Value = source != null
? source.FileName.FileNameWithoutExtension == null
? DBNull.Value
: (object)source.FileName.FileNameWithoutExtension
: DBNull.Value;
cmd.Parameters.Add("@Extension", SqlDbType.NVarChar, 50).Value = source != null?ValidateExtension(source.FileName.Extension) : string.Empty;
cmd.ExecuteNonQuery();
}
}
catch (Exception ex)
{
// rollback the transaction if it was opened locally
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
}
throw new DataException("Error during committing binary chunk to file stream.", ex);
}
finally
{
// commit the transaction if it was opened locally
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Commit();
}
}
}
public void TransactionScope_Begin_AlreadyActive()
{
try
{
TransactionScope.Begin();
TransactionScope.Begin();
}
finally
{
TransactionScope.Rollback();
}
}
/// <summary>
/// Creates a new SnTransaction object and starts a db transaction if the
/// TransactionScope is not yet active. Call this in a 'using' statement.
/// </summary>
/// <param name="isolationLevel">Transaction isolation level.</param>
/// <param name="timeout">Timeout for the transaction.</param>
/// <returns>A disposable SnTransaction object.</returns>
public static SnTransaction Begin(IsolationLevel?isolationLevel = null, TimeSpan?timeout = null)
{
var tran = new SnTransaction
{
_isLocalTransaction = !TransactionScope.IsActive
};
if (tran._isLocalTransaction)
{
TransactionScope.Begin(
isolationLevel ?? IsolationLevel.ReadCommitted,
timeout ?? TimeSpan.FromSeconds(Configuration.Data.TransactionTimeout));
}
return(tran);
}
public void TransactionScope_Commit_UseCase1()
{
string name = "CommitTest-" + Guid.NewGuid().ToString();
AddPathToDelete("/Root/" + name);
TransactionScope.Begin();
var folder = new Folder(Repository.Root);
folder.Name = name;
folder.Save();
TransactionScope.Commit();
folder = (Folder)Node.LoadNode(folder.Id);
Assert.IsNotNull(folder);
Assert.AreEqual(name, folder.Name);
}
public void TransactionScope_Commit_UseCase1()
{
Test(() =>
{
var name = "CommitTest-1";
TransactionScope.Begin();
var folder = new Folder(Repository.Root);
folder.Name = name;
folder.Save();
TransactionScope.Commit();
folder = (Folder)Node.LoadNode(folder.Id);
Assert.IsNotNull(folder);
Assert.AreEqual(name, folder.Name);
});
}
private void ExecuteScripts(List <StringBuilder> scripts)
{
using (var traceOperation = Logger.TraceOperation("Execute storage schema scripts."))
{
// Ensure transaction encapsulation
bool isLocalTransaction = !TransactionScope.IsActive;
if (isLocalTransaction)
{
TransactionScope.Begin();
}
try
{
if (_slotsToReset.Count > 0)
{
StringBuilder sb = new StringBuilder();
scripts.Insert(0, sb);
WriteSlotsToResetScripts(sb, _slotsToReset);
}
foreach (StringBuilder script in scripts)
{
using (var proc = new SqlProcedure {
CommandText = script.ToString(), CommandType = CommandType.Text
})
{
proc.ExecuteNonQuery();
}
}
if (isLocalTransaction)
{
TransactionScope.Commit();
}
traceOperation.IsSuccessful = true;
}
finally
{
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
}
}
}
}
private static void RegisterSchema(SchemaEditor origSchema, SchemaEditor newSchema, SchemaWriter schemaWriter)
{
using (var traceOperation = Logger.TraceOperation("Write storage schema modifications."))
{
// Ensure transaction encapsulation
bool isLocalTransaction = !TransactionScope.IsActive;
if (isLocalTransaction)
{
TransactionScope.Begin();
}
try
{
List <PropertySet> modifiedPropertySets = new List <PropertySet>();
schemaWriter.Open();
WriteSchemaModifications(origSchema, newSchema, schemaWriter, modifiedPropertySets);
foreach (PropertySet modifiedPropertySet in modifiedPropertySets)
{
NodeTypeDependency.FireChanged(modifiedPropertySet.Id);
}
schemaWriter.Close();
if (isLocalTransaction)
{
TransactionScope.Commit();
}
ActiveSchema.Reset();
traceOperation.IsSuccessful = true;
}
finally
{
IDisposable unmanagedWriter = schemaWriter as IDisposable;
if (unmanagedWriter != null)
{
unmanagedWriter.Dispose();
}
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
}
}
}
}
//[TestMethod]
public void TransactionScope_Rollback_UseCase1()
{
Test(() =>
{
var name = "RollbackTest-1";
var folder = new Folder(Repository.Root);
folder.Name = name;
TransactionScope.Begin();
folder.Save();
int id = folder.Id;
Assert.AreNotEqual(0, id);
TransactionScope.Rollback();
Assert.AreEqual(0, folder.Id, "Node.Id must be set back to 0 after a rollback event.");
folder = (Folder)Node.LoadNode(id);
Assert.IsNull(folder);
});
}
//[TestMethod()]
public void TransactionScope_Rollback_UseCase1()
{
string name = "RollbackTest-" + Guid.NewGuid().ToString();
AddPathToDelete("/Root/" + name);
var folder = new Folder(Repository.Root);
folder.Name = name;
TransactionScope.Begin();
folder.Save();
int id = folder.Id;
Assert.AreNotEqual(0, id);
TransactionScope.Rollback();
Assert.AreEqual(0, folder.Id, "Node.Id must be set back to 0 after a rollback event.");
folder = (Folder)Node.LoadNode(id);
Assert.IsNull(folder);
}
public override int Read(byte[] buffer, int offset, int count)
{
if (buffer == null)
{
throw new ArgumentNullException(nameof(buffer));
}
if (offset + count > buffer.Length)
{
throw new ArgumentException("Offset + count must not be greater than the buffer length.");
}
if (offset < 0)
{
throw new ArgumentOutOfRangeException(nameof(offset), "The offset must be greater than zero.");
}
if (count < 0)
{
throw new ArgumentOutOfRangeException(nameof(count), "The count must be greater than zero.");
}
// Calculate the maximum count of the bytes that can be read.
// Return immediately if nothing to read.
var maximumReadableByteCount = Length - Position;
if (maximumReadableByteCount < 1)
{
return(0);
}
var isLocalTransaction = false;
var realCount = (int)Math.Min(count, maximumReadableByteCount);
if (CanInnerBufferHandleReadRequest(realCount))
{
Array.Copy(_innerBuffer, Position - _innerBufferFirstPostion, buffer, offset, realCount);
}
else
{
if (!TransactionScope.IsActive)
{
// make sure we do not use an obsolete value
FileStreamData = null;
// Start a new transaction here to serve the needs of the SqlFileStream type.
TransactionScope.Begin();
isLocalTransaction = true;
}
try
{
// Load transaction data for SqlFilestream. If this is not a local transaction,
// than we will be able to use this data in the future if the client calls
// the Read method multiple times and will not have to execute SQL queries
// every time.
var ctx = BlobStorageBase.GetBlobStorageContext(this.FileId);
if (ctx != null)
{
if (ctx.Provider == BlobStorageBase.BuiltInProvider)
{
FileStreamData = ((SqlClient.BuiltinBlobProviderData)ctx.BlobProviderData).FileStreamData;
}
}
if (FileStreamData == null)
{
throw new InvalidOperationException("Transaction data and file path could not be retrieved for SqlFilestream");
}
using (var fs = new SqlFileStream(FileStreamData.Path, FileStreamData.TransactionContext, FileAccess.Read, FileOptions.SequentialScan, 0))
{
fs.Seek(Position, SeekOrigin.Begin);
_innerBuffer = null;
var bytesRead = 0;
var bytesStoredInInnerBuffer = 0;
while (bytesRead < realCount)
{
var bytesToReadInThisIteration = (int)Math.Min(this.Length - Position - bytesRead, BlobStorage.BinaryChunkSize);
var bytesToStoreInThisIteration = Math.Min(bytesToReadInThisIteration, realCount - bytesRead);
var tempBuffer = new byte[bytesToReadInThisIteration];
// copy the bytes from the file stream to the temp buffer
// (it is possible that we loaded a lot more bytes than the client requested)
fs.Read(tempBuffer, 0, bytesToReadInThisIteration);
// first iteration: create inner buffer for caching a part of the stream in memory
if (_innerBuffer == null)
{
_innerBuffer = new byte[GetInnerBufferSize(realCount)];
_innerBufferFirstPostion = Position;
}
// store a fragment of the data in the inner buffer if possible
if (bytesStoredInInnerBuffer < _innerBuffer.Length)
{
var bytesToStoreInInnerBuffer = Math.Min(bytesToReadInThisIteration, _innerBuffer.Length - bytesStoredInInnerBuffer);
Array.Copy(tempBuffer, 0, _innerBuffer, bytesStoredInInnerBuffer, bytesToStoreInInnerBuffer);
bytesStoredInInnerBuffer += bytesToStoreInInnerBuffer;
}
// copy the chunk from the temp buffer to the buffer of the caller
Array.Copy(tempBuffer, 0, buffer, bytesRead, bytesToStoreInThisIteration);
bytesRead += bytesToReadInThisIteration;
}
}
}
catch
{
// ReSharper disable once InvertIf
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
// cleanup
isLocalTransaction = false;
FileStreamData = null;
}
throw;
}
finally
{
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Commit();
// Set filestream data to null as this was a local transaction and we cannot use it anymore
FileStreamData = null;
}
}
}
Position += realCount;
return(realCount);
}
/// <summary>
/// Starts a chunked save operation on an existing content. It does not write any binary data
/// to the storage, it only makes prerequisite operations - e.g. allocates a new slot in the storage.
/// </summary>
/// <param name="blobProvider">Blob storage provider.</param>
/// <param name="versionId">Content version id.</param>
/// <param name="propertyTypeId">Binary property type id.</param>
/// <param name="fullSize">Full size (stream length) of the binary value.</param>
/// <returns>A token containing all the information (db record ids) that identify a single entry in the blob storage.</returns>
public string StartChunk(IBlobProvider blobProvider, int versionId, int propertyTypeId, long fullSize)
{
var isLocalTransaction = !TransactionScope.IsActive;
if (isLocalTransaction)
{
TransactionScope.Begin();
}
var ctx = new BlobStorageContext(blobProvider)
{
VersionId = versionId, PropertyTypeId = propertyTypeId, FileId = 0, Length = fullSize
};
string blobProviderName = null;
string blobProviderData = null;
if (blobProvider != BlobStorageBase.BuiltInProvider)
{
blobProvider.Allocate(ctx);
blobProviderName = blobProvider.GetType().FullName;
blobProviderData = BlobStorageContext.SerializeBlobProviderData(ctx.BlobProviderData);
}
try
{
using (var cmd = new SqlProcedure {
CommandText = InsertStagingBinaryScript, CommandType = CommandType.Text
})
{
cmd.Parameters.Add("@VersionId", SqlDbType.Int).Value = versionId;
cmd.Parameters.Add("@PropertyTypeId", SqlDbType.Int).Value = propertyTypeId;
cmd.Parameters.Add("@Size", SqlDbType.BigInt).Value = fullSize;
cmd.Parameters.Add("@BlobProvider", SqlDbType.NVarChar, 450).Value = blobProviderName != null ? (object)blobProviderName : DBNull.Value;
cmd.Parameters.Add("@BlobProviderData", SqlDbType.NVarChar, int.MaxValue).Value = blobProviderData != null ? (object)blobProviderData : DBNull.Value;
int binaryPropertyId;
int fileId;
using (var reader = cmd.ExecuteReader())
{
if (reader.Read())
{
binaryPropertyId = reader.GetSafeInt32(0);
fileId = reader.GetSafeInt32(1);
}
else
{
throw new DataException("File row could not be inserted.");
}
}
ctx.FileId = fileId;
return(new ChunkToken
{
VersionId = versionId,
PropertyTypeId = propertyTypeId,
BinaryPropertyId = binaryPropertyId,
FileId = fileId
}.GetToken());
}
}
catch (Exception ex)
{
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Rollback();
}
throw new DataException("Error during saving binary chunk to SQL Server.", ex);
}
finally
{
if (isLocalTransaction && TransactionScope.IsActive)
{
TransactionScope.Commit();
}
}
}
