/// <summary>
/// Called when the server receives an unserialized request.
/// </summary>
/// <param name="requestBytes">The serialized request.</param>
private void OnRequest(byte[] requestBytes)
{
try
{
using (var input = new EnhancedMemoryStream(requestBytes))
{
int typeCode = input.ReadInt32();
SharedMemMessage request;
SharedMemMessage response;
if (typeCode < 0)
{
request = new SharedMemErrorMessage();
}
else
{
request = messageFactory.Create(typeCode);
}
request.InternalReadFrom(input);
request.ReadFrom(input);
try
{
response = requestHandler(request);
if (response == null)
{
throw new NullReferenceException("Server request handler returned a NULL response message.");
}
}
catch (Exception e)
{
response = new SharedMemErrorMessage();
response.InternalError = string.Format("{0}: {1}", e.GetType().FullName, e.Message);
}
response.InternalRequestId = request.InternalRequestId;
response.InternalClientInbox = request.InternalClientInbox;
using (var output = new EnhancedMemoryStream(response.SerializedCapacityHint))
{
output.WriteInt32(response.TypeCode);
response.InternalWriteTo(output);
response.WriteTo(output);
// This call is synchronous but should execute very quickly (microseconds).
outbox.Send(response.InternalClientInbox, output.ToArray());
}
}
}
catch (Exception e)
{
SysLog.LogException(e);
}
}
/// <summary>
/// Asynchronously submits a <see cref="SharedMemMessage"/> request message to the server
/// and waits for and returns the response <see cref="SharedMemMessage"/>.
/// </summary>
/// <param name="request">The request message.</param>
/// <param name="timeout">The optional timeout to override the <see cref="Timeout"/> property.
/// </param>
/// <returns>The response <see cref="SharedMemMessage"/>.</returns>
public Task <SharedMemMessage> CallAsync(SharedMemMessage request, TimeSpan?timeout = null)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (request.InternalRequestId != Guid.Empty)
{
throw new InvalidOperationException("Cannot reuse a [SharedMemMessage] request instance previously submitted for a call operation.");
}
request.InternalRequestId = Guid.NewGuid();
request.InternalClientInbox = this.ClientName;
if (!timeout.HasValue)
{
timeout = this.Timeout;
}
var operation = new PendingOperation(request, new TaskCompletionSource <SharedMemMessage>(), stopwatch.Elapsed + timeout.Value);
lock (syncLock)
{
pendingOperations.Add(request.InternalRequestId, operation);
}
try
{
using (var output = new EnhancedMemoryStream(request.SerializedCapacityHint))
{
output.WriteInt32(request.TypeCode);
request.InternalWriteTo(output);
request.WriteTo(output);
// This call is synchronous but should execute very quickly (microseconds).
outbox.Send(ServerName, output.ToArray());
}
}
catch (Exception e)
{
lock (syncLock)
{
pendingOperations.Remove(operation.RequestMessage.InternalRequestId);
}
operation.Tcs.TrySetException(e);
}
return(operation.Tcs.Task);
}