/*
* Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
*
* The Apache Software License, Version 1.1
*
* Redistribution and use in source and binary forms, with or without
* modification, 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 acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Hessian", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* info@caucho.com.
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* 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 CAUCHO TECHNOLOGY 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.
*
* @author Emil Ong
*/
package com.caucho.jms.services;
import com.caucho.hessian.io.AbstractHessianOutput;
import com.caucho.hessian.io.Hessian2Input;
import com.caucho.hessian.io.Hessian2Output;
import com.caucho.hessian.io.HessianOutput;
import com.caucho.hessian.io.SerializerFactory;
import com.caucho.hessian.server.HessianSkeleton;
import com.caucho.jms.util.BytesMessageInputStream;
import com.caucho.services.server.GenericService;
import com.caucho.util.NullOutputStream;
import javax.jms.*;
import java.io.IOException;
import java.util.logging.Logger;
/**
* MessageListener for serving Hessian services.
*/
public class HessianListener {
protected static Logger log
= Logger.getLogger(HessianListener.class.getName());
private Class _homeAPI;
private Object _homeImpl;
private Class _objectAPI;
private Object _objectImpl;
private HessianSkeleton _homeSkeleton;
private HessianSkeleton _objectSkeleton;
private SerializerFactory _serializerFactory;
private int _listenerMax = 5;
private Connection _jmsConnection;
private ConnectionFactory _connectionFactory;
private Destination _destination;
private Session _jmsSession;
/**
* Sets the home api.
*/
public void setHomeAPI(Class api)
{
_homeAPI = api;
}
/**
* Sets the home implementation
*/
public void setHome(Object home)
{
_homeImpl = home;
}
/**
* Sets the object api.
*/
public void setObjectAPI(Class api)
{
_objectAPI = api;
}
/**
* Sets the object implementation
*/
public void setObject(Object object)
{
_objectImpl = object;
}
/**
* Sets the service class.
*/
public void setService(Object service)
{
setHome(service);
}
/**
* Sets the api-class.
*/
public void setAPIClass(Class api)
{
setHomeAPI(api);
}
/**
* Gets the api-class.
*/
public Class getAPIClass()
{
return _homeAPI;
}
/**
* Sets the name of the connection factory.
*/
public void setConnectionFactory(ConnectionFactory connectionFactory)
{
_connectionFactory = connectionFactory;
}
/**
* Sets the name of the input queue.
*/
public void setDestination(Destination destination)
{
_destination = destination;
}
/**
* Sets the serializer factory.
*/
public void setSerializerFactory(SerializerFactory factory)
{
_serializerFactory = factory;
}
/**
* Gets the serializer factory.
*/
public SerializerFactory getSerializerFactory()
{
if (_serializerFactory == null)
_serializerFactory = new SerializerFactory();
return _serializerFactory;
}
/**
* Sets the serializer send collection java type.
*/
public void setSendCollectionType(boolean sendType)
{
getSerializerFactory().setSendCollectionType(sendType);
}
public void init()
{
if (_homeImpl == null)
_homeImpl = this;
if (_homeImpl != null) {
_homeAPI = findRemoteAPI(_homeImpl.getClass());
if (_homeAPI == null)
_homeAPI = _homeImpl.getClass();
}
if (_objectAPI == null && _objectImpl != null)
_objectAPI = _objectImpl.getClass();
_homeSkeleton = new HessianSkeleton(_homeImpl, _homeAPI);
if (_objectAPI != null)
_homeSkeleton.setObjectClass(_objectAPI);
if (_objectImpl != null) {
_objectSkeleton = new HessianSkeleton(_objectImpl, _objectAPI);
_objectSkeleton.setHomeClass(_homeAPI);
}
else
_objectSkeleton = _homeSkeleton;
}
public void start() throws Throwable
{
_jmsConnection = _connectionFactory.createConnection();
if (_destination instanceof Topic)
_listenerMax = 1;
for (int i = 0; i < _listenerMax; i++) {
Session session =
_jmsConnection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageConsumer consumer = session.createConsumer(_destination);
consumer.setMessageListener(new HessianListenerMDB());
}
_jmsConnection.start();
}
public void stop() throws JMSException
{
_jmsConnection.stop();
}
private Class findRemoteAPI(Class implClass)
{
if (implClass == null || implClass.equals(GenericService.class))
return null;
Class []interfaces = implClass.getInterfaces();
if (interfaces.length == 1)
return interfaces[0];
return findRemoteAPI(implClass.getSuperclass());
}
private class HessianListenerMDB implements MessageListener {
/**
* Execute a request. The "id" property of the request selects the
* bean. Once the bean's selected, it will be applied.
*/
public void onMessage(Message message)
{
try {
String objectId = message.getStringProperty("id");
// XXX ??? ServiceContext.begin(req, serviceId, objectId);
if (! (message instanceof BytesMessage)) {
log.info("HessianListener expects only BytesMessages");
return;
}
BytesMessageInputStream is =
new BytesMessageInputStream((BytesMessage) message);
NullOutputStream os = new NullOutputStream();
Hessian2Input in = new Hessian2Input(is);
AbstractHessianOutput out;
SerializerFactory serializerFactory = getSerializerFactory();
in.setSerializerFactory(serializerFactory);
int code = in.read();
if (code != 'c') {
// XXX: deflate
throw new IOException("expected 'c' in hessian input at " + code);
}
int major = in.read();
int minor = in.read();
if (major >= 2)
out = new Hessian2Output(os);
else
out = new HessianOutput(os);
out.setSerializerFactory(serializerFactory);
if (objectId != null)
_objectSkeleton.invoke(in, out);
else
_homeSkeleton.invoke(in, out);
out.close();
} catch (JMSException e) {
log.warning("Unable to process request: " + e);
} catch (IOException e) {
log.warning("Unable to process request: " + e);
} catch (Throwable e) {
log.warning("Unable to process request: " + e);
}
/* XXX
finally {
ServiceContext.end();
}*/
}
}
}