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| /* RequestResponse.cs, see http://ultramessaging.github.io/UMExamples/RequestResponse/dotnet/ */
using System;
using System.Collections.Generic;
using System.Text;
using com.latencybusters.lbm;
using System.Runtime.InteropServices;
public class RequestResponse
{
public static int run = 1;
public static void main(String[] args)
{
/* Initialization: create necessary UM objects. */
LBMContext ctx = new LBMContext();
/* Create LBMReceiverCallback using the method onReceive defined in this class */
LBMReceiverCallback rcvCallback = new LBMReceiverCallback(onReceive);
/* Create receiver objects */
LBMReceiverAttributes rcv_attr = new LBMReceiverAttributes();
LBMTopic rtopic = new LBMTopic(ctx, "test.topic", rcv_attr);
LBMReceiver rcv = new LBMReceiver(ctx, rtopic, rcvCallback, null, null);
/* Initialize and create source */
LBMTopic stopic = new LBMTopic(ctx, "test.topic", new LBMSourceAttributes());
LBMSource src = new LBMSource(ctx, stopic);
String msgData = "request";
byte[] bytes = new byte[msgData.Length * sizeof(char)];
System.Buffer.BlockCopy(msgData.ToCharArray(), 0, bytes, 0, bytes.Length);
LBMRequest req = new LBMRequest(bytes, bytes.Length);
LBMResponseCallback myResponseCallback = new LBMResponseCallback(onResponse);
req.addResponseCallback(myResponseCallback);
/* Sleep for 1 second to allow TR to complete */
try
{
System.Threading.Thread.Sleep(1000);
}
catch (Exception ex)
{
System.Console.Error.WriteLine("Error System.Threading.Thread.Sleep() exception: " + ex.Message);
System.Environment.Exit(1);
}
/* Send a message. */
src.send(req, LBM.MSG_FLUSH | LBM.SRC_BLOCK);
while (run == 1)
{
try
{
System.Threading.Thread.Sleep(1000);
}
catch (Exception ex)
{
System.Console.Error.WriteLine("Error System.Threading.Thread.Sleep() exception: " + ex.Message);
System.Environment.Exit(1);
}
}
/* Cleanup: delete UM objects. */
req.close();
src.close();
rcv.close();
ctx.close();
} /* main */
/* Class for receiving messages */
static protected int onReceive(object cbArg, LBMMessage msg)
{
switch (msg.type())
{
case LBM.MSG_REQUEST:
{
System.Console.Out.Write("Request Received");
try
{
String msgData = "response";
byte[] bytes = new byte[msgData.Length * sizeof(char)];
System.Buffer.BlockCopy(msgData.ToCharArray(), 0, bytes, 0, bytes.Length);
msg.respond(bytes, msgData.Length, LBM.SRC_NONBLOCK);
}
catch (LBMException ex)
{
System.Console.Out.Write("Error responding to request: " + ex.Message);
}
}
break;
}
return 0;
}/* ReceiverCallback */
/* Class for receiving responses */
public static int onResponse(object cbArg, LBMRequest req, LBMMessage msg)
{
switch (msg.type())
{
case LBM.MSG_RESPONSE:
System.Console.Out.WriteLine("Response Received");
run = 0;
break;
}
return 0;
} /* ResponseCallback */
} /* class RequestResponse */
|