internal IMessageCtrl AsyncProcessMessage(IMessage msg,
IMessageSink replySink,
String receiver)
{
IMessage desResMsg = null;
bool fAdded = true;
String seqNum = null;
try
{
//
// Create a new wait object which will wait for the
// response to arrive
//
if (null != replySink)
{
WaitObject obj = new WaitObject(msg, replySink);
seqNum = GetNextSequenceNumber();
m_hashTable.Add(seqNum, obj);
fAdded = true;
}
SendMessage(msg, receiver, seqNum);
// Note: The response will be deliverd to the OnArrival method
// which is responsible for notifying the sink.
}
catch (Exception e)
{
InternalRemotingServices.RemotingTrace("SmtpChannel::AsyncProcessMessage threw exception " + e.StackTrace);
try
{
// Cleanup state
if (fAdded)
{
m_hashTable.Remove(seqNum);
}
// Notify the sink
if (null != replySink)
{
// Create a message which encapsulates an exception
desResMsg = new ReturnMessage(e, null);
replySink.SyncProcessMessage(desResMsg);
}
}
catch (Exception)
{
// Fatal error.. return null
}
}
return(null);
}
void ProcessResponse(ISmtpMessage smtpMessage, String contentType,
String seqNum, MemoryStream stm)
{
InternalRemotingServices.RemotingTrace("Received response");
// Notify the waiting object that its response
// has arrived
WaitObject obj = (WaitObject)m_hashTable[seqNum];
if (null != obj)
{
InternalRemotingServices.RemotingTrace("Found an object waiting");
// First remove the object in a threadsafe manner
// so that we do not deliver the response twice
// due to duplicate replies or other errors from
// Smtp
lock (obj)
{
if (m_hashTable.Contains(seqNum))
{
InternalRemotingServices.RemotingTrace("Found an object to notify");
m_hashTable.Remove(seqNum);
IMethodCallMessage request = (IMethodCallMessage)obj.Request;
Header[] h = new Header[3];
h[0] = new Header("__TypeName", request.TypeName);
h[1] = new Header("__MethodName", request.MethodName);
h[2] = new Header("__MethodSignature", request.MethodSignature);
IMessage response = CoreChannel.DeserializeMessage(contentType, stm, false, request, h);
InternalRemotingServices.RemotingTrace("Deserialized message");
if (response == null)
{
throw new Exception(CoreChannel.GetResourceString("Remoting_DeserializeMessage"));
}
// Notify the object
obj.Notify(response);
}
}
}
else
{
InternalRemotingServices.RemotingTrace("No object waiting");
}
}
IMessage ReceiveMessage(WaitObject obj)
{
IMessage desResMsg = null;
InternalRemotingServices.RemotingTrace("SmtpChannel::RecieveMessage IN");
lock (obj)
{
if (obj.ShouldWait)
{
InternalRemotingServices.RemotingTrace("ReceiveMessage Staring wait...");
// This will release the lock and wait till the
// receiving thread signals it
Monitor.Wait(obj);
}
// Extract the response object which is set by the
// thread which received the response
desResMsg = obj.Response;
}
InternalRemotingServices.RemotingTrace("Received message");
return(desResMsg);
}
// Internal methods
internal IMessage SyncProcessMessage(IMessage reqMsg, String receiver)
{
IMessage desResMsg = null;
bool fAdded = true;
String seqNum = null;
try
{
InternalRemotingServices.RemotingTrace("SmtpChannel::SyncProcessMessage");
// HACKALERT::
// we are going to temporarily not send the call context
Object callContext = reqMsg.Properties["__CallContext"];
if (callContext != null)
{
reqMsg.Properties["__CallContext"] = null;
}
//
// Create a new wait object which will wait for the
// response to arrive
//
WaitObject obj = new WaitObject(reqMsg, null);
seqNum = GetNextSequenceNumber();
m_hashTable.Add(seqNum, obj);
fAdded = true;
//
// Serialize the message and send it using Smtp
//
SendMessage(reqMsg, receiver, seqNum);
//
// Receive server response
//
InternalRemotingServices.RemotingTrace("SmtpMessageSink::SyncProcessMessage before ReceiveResponse");
desResMsg = ReceiveMessage(obj);
if (callContext != null)
{
desResMsg.Properties["__CallContext"] = callContext;
}
InternalRemotingServices.RemotingTrace("SmtpChannel::Returning successfully from SyncProcessMessage");
}
catch (Exception e)
{
InternalRemotingServices.RemotingTrace("SmtpChannel::SyncProcessMessage threw exception " + e.StackTrace);
try
{
if (fAdded)
{
m_hashTable.Remove(seqNum);
}
desResMsg = new ReturnMessage(e, null);
}
catch (Exception)
{
// Fatal error.. return null
}
}
return(desResMsg);
}
