/*
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* JBoss, Home of Professional Open Source
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* Copyright 2005, JBoss Inc., and individual contributors as indicated
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* by the @authors tag. See the copyright.txt in the distribution for a
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* full listing of individual contributors.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this software; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
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*/
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package org.jbpm.pvm.internal.jobexecutor;
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import java.io.IOException;
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import java.io.PrintWriter;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import org.jbpm.api.Configuration;
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import org.jbpm.api.JbpmException;
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import org.jbpm.pvm.internal.env.EnvironmentFactory;
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import org.jbpm.pvm.internal.processengine.ProcessEngineImpl;
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/**
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* starts the job executor on init and closes the
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* jbpm configuration upon destroy. The closing of the
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* jbpm configuration will also shut down the job executor
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* thread pool.
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* <h1>Config parameters</h1>
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* <table>
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* <tr>
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* <th>Name</th>
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* <th>Description</th>
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* <th>Type</th>
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* <th>Default value</th>
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* </tr>
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* <tr>
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* <td>jbpm.configuration.resource</td>
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* <td>resource location of the jbpm.cfg.xml</td>
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* <td>String</td>
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* <td>jbpm.cfg.xml</td>
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* </tr>
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* </table>
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*
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* <p>Configuration example:
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* <pre>
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* <web-app>
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* ...
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* <servlet >
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* <servlet-name>JobExecutorServlet</servlet-name>
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* <servlet-class>org.jbpm.job.executor.JobExecutorServlet</servlet-class>
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* <load-on-startup>1</load-on-startup>
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* </servlet>
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* <servlet-mapping >
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* <servlet-name>JobExecutorServlet</servlet-name>
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* <url-pattern>/jobexecutor</url-pattern>
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* </servlet-mapping>
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* ...
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* </web-app>
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* </pre>
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* </p>
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*
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* @author Tom Baeyens
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*/
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public class JobExecutorServlet extends HttpServlet {
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private static final long serialVersionUID = 1L;
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JobExecutor jobExecutor;
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public void init() throws ServletException {
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String configurationResource = getInitParameter("jbpm.configuration.resource", "jbpm.cfg.xml");
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EnvironmentFactory environmentFactory = (EnvironmentFactory) new Configuration().setResource(configurationResource).buildProcessEngine();
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jobExecutor = environmentFactory.get(JobExecutor.class);
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if (jobExecutor==null) {
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throw new JbpmException("no job executor configured in resource "+configurationResource);
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}
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jobExecutor.start();
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}
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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PrintWriter out = response.getWriter();
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out.println("<html>");
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out.println("<body>");
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out.println("<h2>JBoss jBPM job Executor Servlet</h2><hr />");
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/* TODO
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Iterator<Thread> iter = jobExecutor.getJobExecutorThreads().values().iterator();
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while (iter.hasNext()) {
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Thread thread = iter.next();
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out.println("<h4>"+thread.getName()+"</h4>");
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out.println("<b>isAlive</b>:"+thread.isAlive());
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}
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*/
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out.println("</body>");
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out.println("</html>");
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}
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String getInitParameter(String name, String defaultValue) {
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String value = getInitParameter(name);
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if (value!=null) {
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return value;
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}
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return defaultValue;
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}
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}
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