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Java EE 6 example source code file (StatelessSessionBean.java)

This example Java EE 6 source code file (StatelessSessionBean.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Java EE 6 tags/keywords

automatic, canceling, canceling, date, date, ejb, illegalstateexception, logrecord, logrecord, schedule, servlet, statelesssession, statelesssessionbean, test, test, too, util, web

The Java EE 6 StatelessSessionBean.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
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 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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package enterprise.automatic_timer_ejb;

import java.util.Date;
import java.util.List;

import javax.ejb.Stateless;
import javax.ejb.Schedule;
import javax.ejb.Timer;
import javax.persistence.EntityManager;
import javax.persistence.Query;
import javax.persistence.PersistenceContext;

import enterprise.automatic_timer_ejb.persistence.LogRecord;

@Stateless
public class StatelessSessionBean implements StatelessSession {

    @PersistenceContext EntityManager em;

    @Schedule(second="*/3", minute="*", hour="*", info="Automatic Timer Test")
    public void test_automatic_timer(Timer t) {
        long count = (Long)em.createNamedQuery("LogRecord.countLoggedTimeouts").getSingleResult();

        System.out.println("Call # " + (count + 1));
        if (count > 10) {
            throw new IllegalStateException("Too many timeouts received: " + count);
        } else if (count == 10) {
            LogRecord lr = new LogRecord("Canceling timer " + t.getInfo() + " at " + new Date());
            em.persist(lr);
            t.cancel();
            System.out.println("Done");
        } else {
            LogRecord lr = new LogRecord("" + t.getInfo() + " timeout received at " + new Date());
            em.persist(lr);
        }
    }

    public List<String> getRecords() {
        return (List<String>)em.createNamedQuery("LogRecord.findAllRecords").getResultList();
    }
}

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Here is a short list of links related to this Java EE 6 StatelessSessionBean.java source code file:



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