/*
* 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.jbpm.ejb.impl;
import javax.ejb.CreateException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jbpm.JbpmConfiguration;
import org.jbpm.JbpmContext;
import org.jbpm.JbpmException;
import org.jbpm.command.Command;
import org.jbpm.command.CommandService;
/**
* A stateless session bean implementation of the {@link org.jbpm.command.CommandService}.
*
* @author Jim Rigsbee, Tom Baeyens
*/
public class CommandServiceBean implements SessionBean, CommandService {
private static final long serialVersionUID = 1L;
JbpmConfiguration jbpmConfiguration = null;
SessionContext sessionContext = null;
/**
* creates a command service that will be used to execute the commands that
* are passed in the execute method. The command service will be build by
* creating a jbpm configuration. In case the environment key JbpmCfgResource
* is specified for this bean, that value will be used to resolve the jbpm
* configuration file as a resource. If that key is not configured, the default
* jbpm configuration file will be used (jbpm.cfg.xml).
*/
public void ejbCreate() throws CreateException {
String jbpmCfgResource = null;
try {
log.debug("getting jbpm configuration resource from the environment properties");
Context initial = new InitialContext();
Context environment = (Context) initial.lookup("java:comp/env");
jbpmCfgResource = (String) environment.lookup("JbpmCfgResource");
} catch (NamingException e) {
log.debug("couldn't find configuration property JbpmCfgResource through JNDI");
}
if (log.isDebugEnabled()) {
if (jbpmCfgResource==null) {
log.debug("getting default jbpm configuration resource (jbpm.cfg.xml)");
} else {
log.debug("getting jbpm configuration from resource "+jbpmCfgResource);
}
}
jbpmConfiguration = JbpmConfiguration.getInstance(jbpmCfgResource);
}
public Object execute(Command command) {
log.debug("handing over the command execution to the command service");
Object result = null;
JbpmContext jbpmContext = jbpmConfiguration.createJbpmContext();
try {
log.debug("executing " + command);
result = command.execute(jbpmContext);
} catch (Exception e) {
throw new JbpmException("couldn't execute "+command, e);
} finally {
jbpmContext.close();
}
return result;
}
public void setSessionContext(SessionContext sessionContext) {
this.sessionContext = sessionContext;
}
public void ejbRemove() {
this.sessionContext = null;
}
public void ejbActivate() {}
public void ejbPassivate() {}
private static final Log log = LogFactory.getLog(CommandServiceBean.class);
}