/*
* JBoss, Home of Professional Open Source
* Copyright 2006, 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.soa.esb.services.jbpm.actionhandlers;
import static org.jboss.soa.esb.services.jbpm.actionhandlers.ActionUtil.*;
import org.apache.log4j.Logger;
import org.dom4j.tree.DefaultElement;
import org.jboss.internal.soa.esb.addressing.helpers.EPRHelper;
import org.jboss.internal.soa.esb.util.LRUCache;
import org.jboss.soa.esb.ConfigurationException;
import org.jboss.soa.esb.addressing.EPR;
import org.jboss.soa.esb.addressing.eprs.LogicalEPR;
import org.jboss.soa.esb.client.ServiceInvoker;
import org.jboss.soa.esb.couriers.Courier;
import org.jboss.soa.esb.couriers.CourierFactory;
import org.jboss.soa.esb.couriers.CourierUtil;
import org.jboss.soa.esb.listeners.message.MessageDeliverException;
import org.jboss.soa.esb.message.Message;
import org.jboss.soa.esb.services.jbpm.Constants;
import org.jboss.soa.esb.services.jbpm.JBpmObjectMapper;
import org.jbpm.context.exe.ContextInstance;
import org.jbpm.graph.def.ActionHandler;
import org.jbpm.graph.exe.ExecutionContext;
/**
*
* Sends ESB messages to ESB services from jBPM in an asynchronous way
*
* <li/>esbCategoryName - for ESB registry lookup
* <li/>esbServiceName - for ESB registry lookup
*
* @author <a href="mailto:kurt.stam@jboss.com">Kurt Stam</a>
*
*/
public class EsbNotifier implements ActionHandler
{
private static final long serialVersionUID = 1L;
private transient Logger logger = Logger.getLogger(getClass());
private static transient LRUCache<String, ServiceInvoker> siCache = new LRUCache<String, ServiceInvoker>(20);
/**
* The ESB Service Category Name, specified in the processdefinition.xml
*/
public String esbCategoryName;
/**
* The ESB Service Name, specified in the processdefinition.xml
*/
public String esbServiceName;
/**
* Default setting of the process scope, can be overriden by setting the
* process-scope attribute on the mapping element.
*/
public Boolean globalProcessScope;
/**
* XML element to specify the mapping of variables from jBPM to ESB.
*/
public DefaultElement bpmToEsbVars;
/**
* Use the replyTo or faultTo EPR from the originator.
*/
public String replyToOriginator;
/**
* Constructs an ESB Message and sends sends to the an ESB Service
* as defined in the processdefinition.xml.
*/
public void execute (ExecutionContext executionContext) throws Exception
{
if (replyToOriginator != null) {
if (!(Constants.EPR_REPLY.equals(replyToOriginator) || Constants.EPR_FAULT.equals(replyToOriginator))) {
throw new ConfigurationException("EPR type (replyToOriginator) must be \"" + Constants.EPR_REPLY + "\" or \"" + Constants.EPR_FAULT + "\"");
}
} else {
if (null == esbCategoryName) {
throw new ConfigurationException(
"Service category (esbCategoryName element) must not be null");
}
if (null == esbServiceName) {
throw new ConfigurationException(
"Service name (esbServiceName element) must not be null");
}
}
JBpmObjectMapper mapper = new JBpmObjectMapper();
Message message = mapper.mapFromJBpmToEsbMessage(bpmToEsbVars, globalProcessScope, executionContext);
final ContextInstance contextInstance = executionContext.getContextInstance();
if (isReplyToOrFaultToSet(contextInstance))
{
setRelatesToMessageId(contextInstance, message);
}
if (logger.isDebugEnabled()) logger.debug("Created ESB message=" + message);
if (replyToOriginator != null) {
final EPR epr ;
final Object replyToEPR = contextInstance.getVariable(Constants.REPLY_TO);
final Object faultToEPR = contextInstance.getVariable(Constants.FAULT_TO);
if (Constants.EPR_FAULT.equals(replyToOriginator) && (faultToEPR != null)) {
epr = EPRHelper.fromXMLString(faultToEPR.toString()) ;
} else if (replyToEPR != null) {
epr = EPRHelper.fromXMLString(replyToEPR.toString()) ;
} else {
throw new ConfigurationException("No EPR present in process instance") ;
}
if(epr instanceof LogicalEPR) {
final ServiceInvoker invoker = ((LogicalEPR)epr).getServiceInvoker();
invoker.deliverAsync(message);
} else {
final Courier courier = CourierFactory.getCourier(epr);
try {
courier.deliver(message);
} finally {
CourierUtil.cleanCourier(courier);
}
}
} else {
getServiceInvoker().deliverAsync(message);
}
logger.debug("Message send successfully");
}
/**
* Caches the most recently used ServiceInvokers.
*
* @return a ServiceInvoker for the current esbService and esbCategoryName.
* @throws MessageDeliverException
*/
private ServiceInvoker getServiceInvoker() throws MessageDeliverException
{
String key = esbCategoryName + esbServiceName;
if (siCache.containsKey(key)) {
return siCache.get(key);
} else {
ServiceInvoker invoker = new ServiceInvoker(esbCategoryName, esbServiceName);
siCache.put(key, invoker);
return invoker;
}
}
}