[jboss-cvs] JBossRemoting/src/main/org/jboss/remoting/samples/callback/statistics ...
Ron Sigal
ron_sigal at yahoo.com
Thu Nov 16 18:46:44 EST 2006
User: rsigal
Date: 06/11/16 18:46:44
Added: src/main/org/jboss/remoting/samples/callback/statistics
CallbackServer.java CallbackClient.java
Log:
JBREM-618: Sample code demonstrating CallbackPoller statistics.
Revision Changes Path
1.1 date: 2006/11/16 23:46:44; author: rsigal; state: Exp;JBossRemoting/src/main/org/jboss/remoting/samples/callback/statistics/CallbackServer.java
Index: CallbackServer.java
===================================================================
/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.remoting.samples.callback.statistics;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import javax.management.MBeanServer;
import org.jboss.remoting.InvocationRequest;
import org.jboss.remoting.InvokerLocator;
import org.jboss.remoting.ServerInvocationHandler;
import org.jboss.remoting.ServerInvoker;
import org.jboss.remoting.callback.Callback;
import org.jboss.remoting.callback.CallbackListener;
import org.jboss.remoting.callback.HandleCallbackException;
import org.jboss.remoting.callback.InvokerCallbackHandler;
import org.jboss.remoting.callback.ServerInvokerCallbackHandler;
import org.jboss.remoting.transport.Connector;
/**
* Simple remoting server. Uses inner class SampleInvocationHandler
* as the invocation target handler class, which will generate
* callback messages upon callback listeners being added.
*
* @author <a href="mailto:telrod at e2technologies.net">Tom Elrod</a>
*/
public class CallbackServer
{
// Default locator values
private static String transport = "socket";
private static String host = "localhost";
private static int port = 5400;
// counter indicating the number of callbacks generated
private static int callbackCounter = 1;
// remoting server connector
private Connector connector = null;
// String to be returned from invocation handler upon client invocation calls.
private static final String RESPONSE_VALUE = "This is the return to SampleInvocationHandler invocation";
/**
* Sets up target remoting server.
*
* @param locatorURI
* @throws Exception
*/
public void setupServer(String locatorURI) throws Exception
{
InvokerLocator locator = new InvokerLocator(locatorURI);
System.out.println("Starting remoting server with locator uri of: " + locatorURI);
connector = new Connector();
connector.setInvokerLocator(locator.getLocatorURI());
connector.create();
SampleInvocationHandler invocationHandler = new SampleInvocationHandler();
connector.addInvocationHandler("sample", invocationHandler);
connector.start();
}
/**
* Shuts down the server
*/
public void shutdownServer()
{
connector.stop();
connector.destroy();
}
/**
* Can pass transport and port to be used as parameters.
*/
public static void main(String[] args)
{
if(args != null && args.length == 2)
{
transport = args[0];
port = Integer.parseInt(args[1]);
}
String locatorURI = transport + "://" + host + ":" + port;
CallbackServer server = new CallbackServer();
try
{
server.setupServer(locatorURI);
// wait forever, let the user kill us at any point (at which point, the client will detect we went down)
while(true)
{
Thread.sleep(1000);
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
/**
* Simple invocation handler implementation. When callback clients are registered, will
* generate callbacks periodically.
*/
public static class SampleInvocationHandler
implements ServerInvocationHandler, Runnable, CallbackListener
{
// list of callback listeners registered
private List listeners = new ArrayList();
// flag to indicate when should generate callback messages
private boolean shouldGenerateCallbacks = false;
public SampleInvocationHandler()
{
// will start a new thread for generating callbacks.
Thread callbackThread = new Thread(this);
callbackThread.setDaemon(true);
callbackThread.start();
}
/**
* Called by the remoting server to handle the invocation from client.
*/
public Object invoke(InvocationRequest invocation) throws Throwable
{
return RESPONSE_VALUE;
}
/**
* Adds a callback handler that will listen for callbacks from
* the server invoker handler.
*/
public void addListener(InvokerCallbackHandler callbackHandler)
{
System.out.println("Adding callback listener.");
listeners.add(callbackHandler);
shouldGenerateCallbacks = true;
}
/**
* Removes the callback handler that was listening for callbacks
* from the server invoker handler.
*/
public void removeListener(InvokerCallbackHandler callbackHandler)
{
System.out.println("Removing callback listener.");
listeners.remove(callbackHandler);
if(listeners.size() == 0)
{
shouldGenerateCallbacks = false;
}
}
/**
* Will generate callback messages every second while shouldGenerateCallbacks
* flag is true.
*/
public void run()
{
// keep looping while waiting to fire callbacks.
while(true)
{
while(shouldGenerateCallbacks)
{
// create new callback message
Callback callback = new Callback("Callback " + callbackCounter + ": This is the payload of callback invocation.");
System.out.println("sending callback: " + callbackCounter);
// Register as listener, pass callback id, and ask Remoting to handle acknowledgements.
HashMap returnPayload = new HashMap();
returnPayload.put(ServerInvokerCallbackHandler.CALLBACK_LISTENER, this);
returnPayload.put(ServerInvokerCallbackHandler.CALLBACK_ID, new Integer(callbackCounter++));
returnPayload.put(ServerInvokerCallbackHandler.REMOTING_ACKNOWLEDGES_PUSH_CALLBACKS, "true");
callback.setReturnPayload(returnPayload);
Iterator itr = listeners.iterator();
while(itr.hasNext())
{
InvokerCallbackHandler callbackHandler = (InvokerCallbackHandler) itr.next();
try
{
callbackHandler.handleCallback(callback);
}
catch(HandleCallbackException e)
{
e.printStackTrace();
}
}
// sleep for a second before firing next callback message
try
{
Thread.sleep(1000);
}
catch(InterruptedException e)
{
}
}
// sleep for a second before while waiting for flag to be set
try
{
Thread.sleep(1000);
}
catch(InterruptedException e)
{
}
}
}
public void setMBeanServer(MBeanServer server) {}
public void setInvoker(ServerInvoker invoker) {}
public void acknowledgeCallback(InvokerCallbackHandler callbackHandler, Object callbackId, Object response)
{
System.out.println("received acknowledgement for callback: " + callbackId);
}
}
}
1.1 date: 2006/11/16 23:46:44; author: rsigal; state: Exp;JBossRemoting/src/main/org/jboss/remoting/samples/callback/statistics/CallbackClient.java
Index: CallbackClient.java
===================================================================
/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.remoting.samples.callback.statistics;
import java.util.HashMap;
import org.jboss.remoting.Client;
import org.jboss.remoting.InvokerLocator;
import org.jboss.remoting.callback.Callback;
import org.jboss.remoting.callback.CallbackPoller;
import org.jboss.remoting.callback.HandleCallbackException;
import org.jboss.remoting.callback.InvokerCallbackHandler;
/**
* Sample client that demonstrates CallbackPoller tuning statistics.
*
* @author <a href="mailto:ron.sigal at jboss.com">Ron Sigal</a>
* @author <a href="mailto:telrod at e2technologies.net">Tom Elrod</a>
*/
public class CallbackClient
{
// Default locator values
private static String transport = "socket";
private static String host = "localhost";
private static int port = 5400;
/**
* Registers callback listener and asks CallbackPoller to print statistics.
*/
public void getPolledCallbacks(String locatorURI) throws Throwable
{
System.out.println("Calling remoting server with locator uri of: " + locatorURI);
InvokerLocator locator = new InvokerLocator(locatorURI);
Client client = new Client(locator);
client.connect();
// Registter callback handler and tell CallbackPoller to report statistics.
CallbackHandler callbackHandler = new CallbackHandler();
HashMap metadata = new HashMap();
metadata.put(CallbackPoller.REPORT_STATISTICS, "true");
client.addListener(callbackHandler, metadata);
// Wait for callbacks to received, processed, and acknowledged.
Thread.sleep(20000);
// remove callback handler from server
client.removeListener(callbackHandler);
client.disconnect();
}
/**
* Can pass transport and port to be used as parameters.
*/
public static void main(String[] args)
{
if(args != null && args.length == 2)
{
transport = args[0];
port = Integer.parseInt(args[1]);
}
String locatorURI = transport + "://" + host + ":" + port;
CallbackClient callbackClient = new CallbackClient();
try
{
callbackClient.getPolledCallbacks(locatorURI);
}
catch(Throwable e)
{
e.printStackTrace();
}
}
/**
* Our implementation of the InvokerCallbackHandler. Simply
* prints out the callback object's message upon receiving it.
*/
public class CallbackHandler implements InvokerCallbackHandler
{
public void handleCallback(Callback callback) throws HandleCallbackException
{
// Slow down callback handling so callbacks build up in CallbackPoller.
try
{
Thread.sleep(1000);
}
catch (InterruptedException e) {}
System.out.println("Received push callback.");
System.out.println("Received callback value of: " + callback.getCallbackObject());
System.out.println("Received callback server invoker of: " + callback.getServerLocator());
}
}
}
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