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Posted to cvs@cocoon.apache.org by un...@apache.org on 2004/01/13 12:35:31 UTC
cvs commit: cocoon-2.1/src/blocks/slide/java/org/apache/cocoon/components/slide/impl JMSEventCacheContentInterceptor.java
unico 2004/01/13 03:35:31
Added: src/blocks/slide/java/org/apache/cocoon/components/slide/impl
JMSEventCacheContentInterceptor.java
Log:
A content interceptor that publishes invalidation messages to a JMS topic.
Revision Changes Path
1.1 cocoon-2.1/src/blocks/slide/java/org/apache/cocoon/components/slide/impl/JMSEventCacheContentInterceptor.java
Index: JMSEventCacheContentInterceptor.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
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 end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``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 THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, 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.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <st...@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.components.slide.impl;
import java.util.Hashtable;
import javax.jms.DeliveryMode;
import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.slide.common.ServiceAccessException;
import org.apache.slide.common.SlideToken;
import org.apache.slide.content.AbstractContentInterceptor;
import org.apache.slide.content.NodeRevisionContent;
import org.apache.slide.content.NodeRevisionDescriptor;
import org.apache.slide.content.NodeRevisionDescriptors;
import org.apache.slide.lock.ObjectLockedException;
import org.apache.slide.security.AccessDeniedException;
import org.apache.slide.structure.LinkedObjectNotFoundException;
import org.apache.slide.structure.ObjectNotFoundException;
import org.apache.slide.util.logger.Logger;
/**
* A ContentInterceptor for Slide that publishes
* invalidation events to a JMS topic.
*
* @author <a href="mailto:unico@apache.org">Unico Hommes</a>
*/
public class JMSEventCacheContentInterceptor
extends AbstractContentInterceptor {
private TopicConnection m_connection;
private TopicSession m_session;
private Topic m_topic;
private TopicPublisher m_publisher;
private int m_deliveryMode;
private int m_priority;
private long m_timeToLive;
private boolean started = false;
public JMSEventCacheContentInterceptor() {
}
/* (non-Javadoc)
* @see org.apache.slide.content.ContentInterceptor#setParameters(java.util.Hashtable)
*/
public void setParameters(Hashtable params) {
super.setParameters(params);
// parse the JMS related parameters
String topicFactoryName = getParameter("topic-factory","JmsTopicConnectionFactory");
String topicName = getParameter("topic","topic1");
String ackModeName = getParameter("ack-mode","dups");
boolean persistent = Boolean.valueOf(getParameter("persistent-delivery","false")).booleanValue();
m_deliveryMode = persistent ? DeliveryMode.PERSISTENT : DeliveryMode.NON_PERSISTENT;
m_priority = Integer.valueOf(getParameter("priority","4")).intValue();
m_timeToLive = Long.valueOf(getParameter("time-to-live","1000")).longValue();
// see if an ack mode has been specified. If it hasn't
// then assume CLIENT_ACKNOWLEDGE mode.
int ackMode = Session.CLIENT_ACKNOWLEDGE;
if (ackModeName.equals("auto")) {
ackMode = Session.AUTO_ACKNOWLEDGE;
} else if (ackModeName.equals("dups")) {
ackMode = Session.DUPS_OK_ACKNOWLEDGE;
} else if (!ackModeName.equals("client")) {
// ignore all ack modes, to test no acking
ackMode = -1;
}
// parse the JNDI related parameters
Hashtable props = new Hashtable();
props.put(Context.INITIAL_CONTEXT_FACTORY,
getParameter(Context.INITIAL_CONTEXT_FACTORY,
"org.exolab.jms.jndi.InitialContextFactory")
);
props.put(Context.PROVIDER_URL,
getParameter(Context.PROVIDER_URL,
"rmi://localhost:1099/")
);
// setup the JMS connection and session
try {
Context context = new InitialContext(props);
TopicConnectionFactory topicConnectionFactory = (TopicConnectionFactory)
context.lookup(topicFactoryName);
m_connection = topicConnectionFactory.createTopicConnection();
m_connection.start();
m_session = m_connection.createTopicSession(false,ackMode);
m_topic = m_session.createTopic(topicName);
m_publisher = m_session.createPublisher(m_topic);
started = true;
} catch (NamingException e) {
e.printStackTrace();
} catch (JMSException e) {
e.printStackTrace();
}
}
private String getParameter(String name, String defaultValue) {
String value = super.getParameter(name);
if (value == null) {
value = defaultValue;
}
return value;
}
/* (non-Javadoc)
* @see org.apache.slide.content.ContentInterceptor#postRemoveContent(org.apache.slide.common.SlideToken, org.apache.slide.content.NodeRevisionDescriptors, org.apache.slide.content.NodeRevisionDescriptor)
*/
public void postRemoveContent(
SlideToken slideToken,
NodeRevisionDescriptors revisions,
NodeRevisionDescriptor revision)
throws
AccessDeniedException,
ObjectNotFoundException,
LinkedObjectNotFoundException,
ObjectLockedException,
ServiceAccessException {
if (!started) {
return;
}
if (revisions == null) {
return;
}
try {
sendMessage(revisions.getUri());
}
catch (JMSException e) {
e.printStackTrace();
}
}
/* (non-Javadoc)
* @see org.apache.slide.content.ContentInterceptor#postStoreContent(org.apache.slide.common.SlideToken, org.apache.slide.content.NodeRevisionDescriptors, org.apache.slide.content.NodeRevisionDescriptor, org.apache.slide.content.NodeRevisionContent)
*/
public void postStoreContent(
SlideToken slideToken,
NodeRevisionDescriptors revisions,
NodeRevisionDescriptor revision,
NodeRevisionContent content)
throws
AccessDeniedException,
ObjectNotFoundException,
LinkedObjectNotFoundException,
ObjectLockedException,
ServiceAccessException {
if (!started) {
return;
}
if (revisions == null) {
return;
}
try {
sendMessage(revisions.getUri());
}
catch (JMSException e) {
e.printStackTrace();
}
}
private void sendMessage(String uri) throws JMSException {
String msg = "interceptor|" + getNamespace().getName() + uri;
if (getLogger().isEnabled(Logger.INFO)) {
getLogger().log("Sending message: " + msg,Logger.INFO);
}
m_publisher.publish(m_session.createTextMessage(msg),m_deliveryMode,m_priority,m_timeToLive);
}
private Logger getLogger() {
return getNamespace().getLogger();
}
}