Package org.jboss.as.quickstarts.cluster.hasingleton.service.ejb

Source Code of org.jboss.as.quickstarts.cluster.hasingleton.service.ejb.SchedulerBean

/*
* JBoss, Home of Professional Open Source
* Copyright 2013, Red Hat, Inc. and/or its affiliates, and individual
* contributors by the @authors tag. See the copyright.txt in the
* distribution for a full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.as.quickstarts.cluster.hasingleton.service.ejb;

import javax.annotation.Resource;
import javax.ejb.ScheduleExpression;
import javax.ejb.Singleton;
import javax.ejb.Timeout;
import javax.ejb.Timer;
import javax.ejb.TimerConfig;
import javax.ejb.TimerService;

import org.jboss.logging.Logger;


/**
* A simple example to demonstrate a implementation of a cluster-wide singleton timer.
*
* @author <a href="mailto:wfink@redhat.com">Wolf-Dieter Fink</a>
*/
@Singleton
public class SchedulerBean implements Scheduler {
    private static Logger LOGGER = Logger.getLogger(SchedulerBean.class);
    @Resource
    private TimerService timerService;

    @Timeout
    public void scheduler(Timer timer) {
        LOGGER.info("HASingletonTimer: Info=" + timer.getInfo());
    }

    @Override
    public void initialize(String info) {
        ScheduleExpression sexpr = new ScheduleExpression();
        // set schedule to every 10 seconds for demonstration
        sexpr.hour("*").minute("*").second("0/10");
        // persistent must be false because the timer is started by the HASingleton service
        timerService.createCalendarTimer(sexpr, new TimerConfig(info, false));
    }

    @Override
    public void stop() {
        LOGGER.info("Stop all existing HASingleton timers");
        for (Timer timer : timerService.getTimers()) {
            LOGGER.trace("Stop HASingleton timer: " + timer.getInfo());
            timer.cancel();
        }
    }
}
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