/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Reza Rahman
*/
package com.caucho.config.timer;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.TimeZone;
import javax.ejb.Schedule;
import javax.ejb.Schedules;
import javax.enterprise.inject.spi.AnnotatedMethod;
import javax.enterprise.inject.spi.AnnotatedType;
import com.caucho.config.types.Trigger;
/**
* Processes EJB declarative scheduling. The scheduling functionality can be
* applied to bean types that are not EJBs.
*
* @author Reza Rahman
*/
public class ScheduleIntrospector {
/**
* Introspects the method for scheduling attributes.
*/
public ArrayList<TimerTask> introspect(TimeoutCaller caller,
AnnotatedType<?> type)
{
ArrayList<TimerTask> timers = null;
for (AnnotatedMethod<?> method : type.getMethods()) {
Schedules schedules = method.getAnnotation(Schedules.class);
if (schedules != null) {
if (timers == null)
timers = new ArrayList<TimerTask>();
for (Schedule schedule : schedules.value()) {
addSchedule(timers, schedule, caller, getScheduledMethod(method));
}
}
Schedule schedule = method.getAnnotation(Schedule.class);
if (schedule != null) {
if (timers == null)
timers = new ArrayList<TimerTask>();
addSchedule(timers, schedule, caller, getScheduledMethod(method));
}
}
return timers;
}
/**
* Returns the method to call when the schedule event occurs.
*/
protected Method getScheduledMethod(AnnotatedMethod<?> method)
{
return method.getJavaMember();
}
private void addSchedule(ArrayList<TimerTask> timers, Schedule schedule,
TimeoutCaller caller, Method method)
{
CronExpression cronExpression
= new CronExpression(schedule.second(),
schedule.minute(),
schedule.hour(),
schedule.dayOfWeek(),
schedule.dayOfMonth(),
schedule.month(),
schedule.year());
TimeZone timezone = null;
if (!schedule.timezone().trim().equals("")) {
timezone = TimeZone.getTimeZone(schedule.timezone());
}
Trigger trigger = new CronTrigger(cronExpression, -1, -1, timezone);
EjbTimer ejbTimer = new EjbTimer();
TimeoutInvoker timeoutInvoker
= new MethodTimeoutInvoker(caller, method);
TimerTask timerTask
= new TimerTask(timeoutInvoker, ejbTimer,
cronExpression, trigger, schedule.info());
ejbTimer.setScheduledTask(timerTask);
timers.add(timerTask);
}
}