/**
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided
* that the following conditions are met:
*
* 1. Redistributions of source code must retain copyright
* statements and notices. Redistributions must also contain a
* copy of this document.
*
* 2. Redistributions in binary form must reproduce the
* above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. The name "Exolab" must not be used to endorse or promote
* products derived from this Software without prior written
* permission of Exoffice Technologies. For written permission,
* please contact info@exolab.org.
*
* 4. Products derived from this Software may not be called "Exolab"
* nor may "Exolab" appear in their names without prior written
* permission of Exoffice Technologies. Exolab is a registered
* trademark of Exoffice Technologies.
*
* 5. Due credit should be given to the Exolab Project
* (http://www.exolab.org/).
*
* THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 1999 (C) Exoffice Technologies Inc. All Rights Reserved.
*
* $Id: ExoLabApplicationServer.java,v 1.3 2001/09/24 08:40:32 jima Exp $
*
* Date Author Changes
* 11/02/2000 jima Created
*/
package openjms.examples.appserver;
// java util
import java.util.Hashtable;
// java io
import java.io.PrintStream;
// naming
import javax.naming.Context;
import javax.naming.InitialContext;
// exolab core
import org.exolab.jms.util.CommandLine;
// jms package
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicConnection;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.ConnectionConsumer;
import javax.jms.JMSException;
import javax.jms.Topic;
// jms specific
import org.exolab.jms.client.JmsServerSessionPool;
import org.exolab.jms.client.JmsTopic;
// logger
import org.exolab.core.logger.LoggerIfc;
import org.exolab.core.logger.LoggerFactory;
/**
* This class provides a context to test the application server
*/
public class ExoLabApplicationServer
implements Runnable
{
/**
* The mainline will instantiate an application server and start it.
*/
public static void main (String[] args)
{
try
{
// create the mock app server
ExoLabApplicationServer server = new ExoLabApplicationServer(
new CommandLine(args));
// start it up.
(new Thread(server)).start();
}
catch (Exception exception)
{
getLogger().logError("Failed to init the application server " +
exception);
exception.printStackTrace();
}
}
/**
* The constructor will instantiate a connection to the server, initialise the
* connection and connection consumer and then start the connection.
* <p>
* It uses the command line to retrieve the particular options.
*/
private ExoLabApplicationServer(CommandLine cmdline)
throws Exception
{
String topic_name = cmdline.value("topic");
if (cmdline.exists("help") )
{
usage();
}
else if (topic_name != null)
{
// connect to the JNDI server and get a reference to
// root context
Hashtable props = new Hashtable();
String mode = cmdline.value("mode");
String modeType =
"org.exolab.jms.jndi.rmi.RmiJndiInitialContextFactory";
if (mode != null)
{
if (mode.equals("ipc"))
{
System.out.println("Using IPC mode");
modeType =
"org.exolab.jms.jndi.mipc.IpcJndiInitialContextFactory";
}
}
props.put(Context.INITIAL_CONTEXT_FACTORY, modeType);
Context context = new InitialContext(props);
// if we can't get the root context then exit with an exception
if (context == null)
{
throw new RuntimeException("Failed to get the root context");
}
// lookup the connection factory from the context
TopicConnectionFactory factory =
(TopicConnectionFactory)context.lookup("JmsTopicConnectionFactory");
// if we can't find the factory then throw an exception
if (factory == null)
{
throw new RuntimeException("Failed to locate connection factory");
}
// create the topic. In reality the topic should be registered with JNDI
// but this will do for now.
Topic topic = new JmsTopic(topic_name);
// get a topic connection to the factory.
connection_ = factory.createTopicConnection();
// set up the server session pool size to 15 and a message listener
JmsServerSessionPool.init(15,
new MessageListener ()
{
/**
* Simply log the message to the screen
*
* @param message message it receives
*/
public void onMessage(Message message)
{
ExoLabApplicationServer.getLogger().logInfo(
"[" + Thread.currentThread().hashCode() +
"] Processing message " + message);
// sleep for awhile
try
{
Thread.currentThread().sleep(2000);
}
catch (InterruptedException exception)
{
}
}
}
);
// create a connection consumer
connectionConsumer_ = connection_.createConnectionConsumer(
topic, null, JmsServerSessionPool.instance(), 1);
// log a trace method
getLogger().logInfo("ExoLabApplicationServer is ready.");
}
else
{
usage();
}
}
/**
* Run the application server. This will start the connection, which will
* enable it to receive messages
*/
public void run()
{
try
{
connection_.start();
}
catch (JMSException exception)
{
exception.printStackTrace();
}
}
/**
* Print out information on running this sevice
*/
static protected void usage()
{
PrintStream out = System.out;
out.println("\n\n");
out.println("========================================================================");
out.println("Usage information for openjms.examples.appserver.ExoLabApplicationServer");
out.println("========================================================================");
out.println("\nopenjms.examples.appserver.ExoLabApplicationserve");
out.println(" [-help | -topic <topic name> | -mode <rmi/ipc> \n");
out.println("\t-help displays this screen\n");
out.println("\t-topic topic name to subscriber under.\n");
out.println("\t-mode connect in either ipc mode or rmi mode.\n");
// force exit
System.exit(0);
}
/**
* Return a reference ot the logger
*/
static LoggerIfc getLogger()
{
return LoggerFactory.getLogger();
}
/**
* This is the reference to the topic connection, used by this appserver
*/
private TopicConnection connection_ = null;
/**
* This is a reference to the connection consumer
*/
private ConnectionConsumer connectionConsumer_ = null;
}