/// <summary>
/// Initializes a new instance of the BlobWriteStreamBase class.
/// </summary>
/// <param name="accessCondition">An object that represents the access conditions for the blob. If null, no condition is used.</param>
/// <param name="options">An object that specifies any additional options for the request.</param>
/// <param name="operationContext">An <see cref="OperationContext"/> object for tracking the current operation.</param>
private BlobWriteStreamBase(CloudBlobClient serviceClient, AccessCondition accessCondition, BlobRequestOptions options, OperationContext operationContext)
: base()
{
this.currentOffset = 0;
this.accessCondition = accessCondition;
this.options = options;
this.operationContext = operationContext;
this.pendingWrites = 0;
this.noPendingWritesEvent = new ManualResetEvent(true);
this.blobMD5 = options.StoreBlobContentMD5.Value ? new MD5Wrapper() : null;
this.blockMD5 = options.UseTransactionalMD5.Value ? new MD5Wrapper() : null;
this.parallelOperationSemaphore = new AsyncSemaphore(serviceClient.ParallelOperationThreadCount);
this.lastException = null;
}
/// <summary>
/// Initializes a new instance of the BlobWriteStreamBase class.
/// </summary>
/// <param name="serviceClient">The service client.</param>
/// <param name="accessCondition">An <see cref="AccessCondition"/> object that represents the condition that must be met in order for the request to proceed. If <c>null</c>, no condition is used.</param>
/// <param name="options">A <see cref="BlobRequestOptions"/> object that specifies additional options for the request.</param>
/// <param name="operationContext">An <see cref="OperationContext"/> object that represents the context for the current operation.</param>
private BlobWriteStreamBase(CloudBlobClient serviceClient, AccessCondition accessCondition, BlobRequestOptions options, OperationContext operationContext)
: base()
{
this.internalBuffer = new MultiBufferMemoryStream(serviceClient.BufferManager);
this.accessCondition = accessCondition;
this.currentOffset = 0;
this.options = options;
this.operationContext = operationContext;
this.noPendingWritesEvent = new CounterEvent();
this.blobMD5 = this.options.StoreBlobContentMD5.Value ? new MD5Wrapper() : null;
this.blockMD5 = this.options.UseTransactionalMD5.Value ? new MD5Wrapper() : null;
this.parallelOperationSemaphore = new AsyncSemaphore(options.ParallelOperationThreadCount.Value);
this.lastException = null;
this.committed = false;
this.disposed = false;
}
/// <summary>
/// Initializes a new instance of the FileWriteStreamBase class for a file.
/// </summary>
/// <param name="file">File reference to write to.</param>
/// <param name="fileSize">Size of the file.</param>
/// <param name="createNew">Use <c>true</c> if the file is newly created, <c>false</c> otherwise.</param>
/// <param name="accessCondition">An <see cref="AccessCondition"/> object that represents the access conditions for the file. If <c>null</c>, no condition is used.</param>
/// <param name="options">An <see cref="FileRequestOptions"/> object that specifies additional options for the request.</param>
/// <param name="operationContext">An <see cref="OperationContext"/> object for tracking the current operation.</param>
protected FileWriteStreamBase(CloudFile file, long fileSize, bool createNew, AccessCondition accessCondition, FileRequestOptions options, OperationContext operationContext)
: base()
{
this.internalBuffer = new MultiBufferMemoryStream(file.ServiceClient.BufferManager);
this.currentOffset = 0;
this.accessCondition = accessCondition;
this.options = options;
this.operationContext = operationContext;
this.noPendingWritesEvent = new CounterEvent();
this.fileMD5 = this.options.StoreFileContentMD5.Value ? new MD5Wrapper() : null;
this.rangeMD5 = this.options.UseTransactionalMD5.Value ? new MD5Wrapper() : null;
this.parallelOperationSemaphore = new AsyncSemaphore(options.ParallelOperationThreadCount.Value);
this.lastException = null;
this.committed = false;
this.disposed = false;
this.currentFileOffset = 0;
this.file = file;
this.fileSize = fileSize;
this.streamWriteSizeInBytes = file.StreamWriteSizeInBytes;
this.newFile = createNew;
}
/// <summary>
/// Initializes a new instance of the BlobReadStrea class.
/// </summary>
/// <param name="blob">Blob reference to read from</param>
/// <param name="accessCondition">An object that represents the access conditions for the blob. If null, no condition is used.</param>
/// <param name="options">An object that specifies any additional options for the request.</param>
/// <param name="operationContext">An <see cref="OperationContext"/> object for tracking the current operation.</param>
internal BlobReadStream(ICloudBlob blob, AccessCondition accessCondition, BlobRequestOptions options, OperationContext operationContext)
: base(blob, accessCondition, options, operationContext)
{
this.parallelOperationSemaphore = new AsyncSemaphore(1);
}
/// <summary>
/// Initializes a new instance of the BlobWriteStreamBase class for an append blob.
/// </summary>
/// <param name="appendBlob">Blob reference to write to.</param>
/// <param name="accessCondition">An <see cref="AccessCondition"/> object that represents the condition that must be met in order for the request to proceed. If <c>null</c>, no condition is used.</param>
/// <param name="options">A <see cref="BlobRequestOptions"/> object that specifies additional options for the request.</param>
/// <param name="operationContext">An <see cref="OperationContext"/> object that represents the context for the current operation.</param>
protected BlobWriteStreamBase(CloudAppendBlob appendBlob, AccessCondition accessCondition, BlobRequestOptions options, OperationContext operationContext)
: this(appendBlob.ServiceClient, accessCondition, options, operationContext)
{
this.accessCondition = this.accessCondition ?? new AccessCondition();
// If we are creating a new blob, create call would have appropriately set the length to 0. For an existing blob, if user specified a condition with append offset,
// we will use it. Otherwise, we will use the length returned by the FetchAttributes call.
this.currentBlobOffset = this.accessCondition.IfAppendPositionEqual.HasValue ? this.accessCondition.IfAppendPositionEqual.Value : appendBlob.Properties.Length;
this.operationContext = this.operationContext ?? new OperationContext();
this.appendBlob = appendBlob;
this.Blob = this.appendBlob;
this.parallelOperationSemaphore = new AsyncSemaphore(1);
this.streamWriteSizeInBytes = appendBlob.StreamWriteSizeInBytes;
}
