/// <summary>
/// Constructor.
/// </summary>
public SignalRequest()
{
// This class may only be constructed within signal or workflow methods.
WorkflowBase.CheckCallContext(allowSignal: true, allowWorkflow: true);
SignalId = Workflow.Current.SignalId;
}
/// <summary>
/// Releases all associated resources.
/// </summary>
/// <param name="disposing">Pass <c>true</c> if we're disposing, <c>false</c> if we're finalizing.</param>
protected virtual void Dispose(bool disposing)
{
WorkflowBase.CheckCallContext(allowWorkflow: true, allowSignal: true);
if (disposing && !isClosed)
{
CloseAsync().WaitWithoutAggregate();
}
isDisposed = true;
}
/// <summary>
/// Internal constructor.
/// </summary>
/// <param name="parentWorkflow">The parent workflow.</param>
/// <param name="queueId">The queue ID.</param>
/// <param name="capacity">The maximum number of items allowed in the queue.</param>
/// <exception cref="NotSupportedException">Thrown when this is called outside of a workflow entry point method.</exception>
/// <remarks>
/// <note>
/// <see cref="WorkflowQueue{T}"/> instances may only be created within
/// workflow entry point methods.
/// </note>
/// </remarks>
internal WorkflowQueue(Workflow parentWorkflow, long queueId, int capacity)
{
Covenant.Requires <ArgumentNullException>(parentWorkflow != null, nameof(parentWorkflow));
Covenant.Requires <ArgumentException>(queueId > 0, nameof(queueId));
Covenant.Requires <ArgumentException>(capacity >= 2, nameof(capacity));
WorkflowBase.CheckCallContext(allowWorkflow: true);
this.client = parentWorkflow.Client;
this.contextId = parentWorkflow.ContextId;
this.Capacity = capacity;
this.queueId = queueId;
this.isClosed = false;
}
/// <summary>
/// Called by your workflow logic to indicate that processing for the synchronous
/// signal is complete as well as specifying the signal result.
/// </summary>
/// <param name="result">The value to be returned by the signal.</param>
/// <returns>The tracking <see cref="Task"/>.</returns>
public async Task ReplyAsync(TResult result)
{
await SyncContext.Clear;
// This may only be called within a workflow method.
WorkflowBase.CheckCallContext(allowWorkflow: true);
// Save the signal completion and result so a subsequent polling query can retrieve it.
SignalStatus.Result = Workflow.Current.Client.DataConverter.ToData(result);
SignalStatus.Completed = true;
await Task.CompletedTask;
}
/// <summary>
/// Called by your workflow logic to indicate that processing for the synchronous
/// signal is complete. This method also waits for a period of time before
/// returning to help ensure that the signal result can be delivered back to
/// the calling client before the workflow terminates.
/// </summary>
/// <returns>The tracking <see cref="Task"/>.</returns>
public async Task ReplyAsync()
{
await SyncContext.Clear;
// This may only be called within a workflow method.
WorkflowBase.CheckCallContext(allowWorkflow: true);
// Save the signal completion so a subsequent polling query can retrieve it.
SignalStatus.Result = null; // NULL result for void signal methods
SignalStatus.Completed = true;
await Task.CompletedTask;
}