110 lines
3.8 KiB
C#
110 lines
3.8 KiB
C#
//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.ServiceModel.Activities
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{
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using System.Runtime;
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using System.ServiceModel.Activities.Dispatcher;
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using System.Threading;
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[Fx.Tag.XamlVisible(false)]
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public sealed class WorkflowHostingResponseContext
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{
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AsyncWaitHandle responseWaitHandle;
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WorkflowOperationContext context;
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object returnValue;
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object[] outputs;
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// Used by Creation Endpoint
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internal WorkflowHostingResponseContext()
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{
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this.responseWaitHandle = new AsyncWaitHandle(EventResetMode.AutoReset);
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}
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// Used by BookmarkResumption Endpoint
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internal WorkflowHostingResponseContext(WorkflowOperationContext context)
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{
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this.context = context;
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}
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public void SendResponse(object returnValue, object[] outputs)
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{
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this.returnValue = returnValue;
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this.outputs = outputs ?? EmptyArray.Allocate(0);
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if (this.responseWaitHandle != null)
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{
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this.responseWaitHandle.Set();
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}
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else
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{
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Fx.Assert(this.context != null, "context must not be null!");
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if (this.returnValue is Exception)
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{
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this.context.SendFault((Exception)this.returnValue);
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}
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else
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{
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this.context.SendReply(this.returnValue, this.outputs);
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}
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}
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}
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object GetResponse(out object[] outputs)
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{
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if (this.returnValue is Exception)
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{
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throw FxTrace.Exception.AsError((Exception)this.returnValue);
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}
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outputs = this.outputs;
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return this.returnValue;
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}
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internal IAsyncResult BeginGetResponse(TimeSpan timeout, AsyncCallback callback, object state)
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{
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Fx.Assert(this.responseWaitHandle != null, "this.responseWaitHandle must not be null!");
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return GetResponseAsyncResult.Create(this, timeout, callback, state);
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}
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internal object EndGetResponse(IAsyncResult result, out object[] outputs)
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{
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return GetResponseAsyncResult.End(result, out outputs);
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}
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class GetResponseAsyncResult : AsyncResult
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{
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static Action<object, TimeoutException> handleEndWait = new Action<object, TimeoutException>(HandleEndWait);
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WorkflowHostingResponseContext context;
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GetResponseAsyncResult(WorkflowHostingResponseContext context, TimeSpan timeout, AsyncCallback callback, object state)
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: base(callback, state)
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{
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this.context = context;
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if (context.responseWaitHandle.WaitAsync(handleEndWait, this, timeout))
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{
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Complete(true);
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}
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}
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public static GetResponseAsyncResult Create(WorkflowHostingResponseContext context, TimeSpan timeout, AsyncCallback callback, object state)
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{
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return new GetResponseAsyncResult(context, timeout, callback, state);
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}
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public static object End(IAsyncResult result, out object[] outputs)
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{
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GetResponseAsyncResult thisPtr = AsyncResult.End<GetResponseAsyncResult>(result);
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return thisPtr.context.GetResponse(out outputs);
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}
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static void HandleEndWait(object state, TimeoutException e)
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{
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GetResponseAsyncResult thisPtr = (GetResponseAsyncResult)state;
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thisPtr.Complete(false, e);
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}
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}
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}
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}
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