/// <summary>
/// Asynchronously ends an active changeset - implementation of the actual functionality.
/// </summary>
/// <returns>A task that represents the asynchronous write operation.</returns>
protected override async Task WriteEndChangesetImplementationAsync()
{
// Write pending message data (headers, response line) for a previously unclosed message/request
await this.WritePendingMessageDataAsync(true)
.ConfigureAwait(false);
string currentChangesetBoundary = this.changeSetBoundary;
// Change the state first so we validate the change set boundary before attempting to write it.
this.SetState(BatchWriterState.ChangesetCompleted);
this.dependsOnIdsTracker.ChangeSetEnded();
Debug.Assert(this.changeSetBoundary != null, "this.changeSetBoundary != null");
this.changeSetBoundary = null;
// In the case of an empty changeset the start changeset boundary has not been written yet
// we will leave it like that, since we want the empty changeset to be represented only as
// the end changeset boundary.
// Due to WCF DS V2 compatibility we must not write the start boundary in this case
// otherwise WCF DS V2 won't be able to read it (it fails on the start-end boundary empty changeset).
// Write the end boundary for the change set
await ODataMultipartMixedBatchWriterUtils.WriteEndBoundaryAsync(
this.RawOutputContext.TextWriter,
currentChangesetBoundary,
!this.changesetStartBoundaryWritten).ConfigureAwait(false);
}
/// <summary>
/// Asynchronously ends a batch - implementation of the actual functionality.
/// </summary>
/// <returns>A task that represents the asynchronous write operation.</returns>
protected override async Task WriteEndBatchImplementationAsync()
{
Debug.Assert(
this.batchStartBoundaryWritten || this.CurrentOperationMessage == null,
"If not batch boundary was written we must not have an active message.");
// Write pending message data (headers, response line) for a previously unclosed message/request
await this.WritePendingMessageDataAsync(true)
.ConfigureAwait(false);
this.SetState(BatchWriterState.BatchCompleted);
// Write the end boundary for the batch
await ODataMultipartMixedBatchWriterUtils.WriteEndBoundaryAsync(
this.RawOutputContext.TextWriter,
this.batchBoundary,
!this.batchStartBoundaryWritten).ConfigureAwait(false);
// For compatibility with WCF DS we write a newline after the end batch boundary.
// Technically it's not needed, but it doesn't violate anything either.
await this.RawOutputContext.TextWriter.WriteLineAsync()
.ConfigureAwait(false);
}