/*
* 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.pvm.internal.job;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.jbpm.api.JbpmException;
import org.jbpm.api.cmd.Environment;
import org.jbpm.api.job.Timer;
import org.jbpm.internal.log.Log;
import org.jbpm.pvm.internal.cal.BusinessCalendar;
import org.jbpm.pvm.internal.env.EnvironmentImpl;
import org.jbpm.pvm.internal.id.DbidGenerator;
import org.jbpm.pvm.internal.jobexecutor.JobAddedNotification;
import org.jbpm.pvm.internal.jobexecutor.JobExecutor;
import org.jbpm.pvm.internal.model.ObservableElement;
import org.jbpm.pvm.internal.script.ScriptManager;
import org.jbpm.pvm.internal.session.DbSession;
import org.jbpm.pvm.internal.session.TimerSession;
import org.jbpm.pvm.internal.tx.Transaction;
import org.jbpm.pvm.internal.util.Clock;
/** a runtime timer instance.
*
* <p>Timers can be
* </p>
*
* @author Tom Baeyens
* @author Pascal Verdage
* @author Alejandro Guizar
*/
public class TimerImpl extends JobImpl<Boolean> implements Timer {
private static final long serialVersionUID = 1L;
private static final Log log = Log.getLog(TimerImpl.class.getName());
private final static String dateFormat = "yyyy-MM-dd HH:mm:ss,SSS";
protected String signalName;
protected String eventName;
protected String repeat;
public static final String EVENT_TIMER = "timer";
public TimerImpl() {
}
public void schedule() {
this.dbid = DbidGenerator.getDbidGenerator().getNextId();
TimerSession timerSession = EnvironmentImpl.getFromCurrent(TimerSession.class);
timerSession.schedule(this);
}
public void setDueDateDescription(String dueDateDescription) {
ScriptManager scriptManager = ScriptManager.getScriptManager();
dueDateDescription = (String) scriptManager.evaluateExpression(dueDateDescription, null);
Date now = Clock.getCurrentTime();
BusinessCalendar businessCalendar = EnvironmentImpl.getFromCurrent(BusinessCalendar.class);
duedate = businessCalendar.add(now, dueDateDescription);
}
public Boolean execute(Environment environment) throws Exception {
if (log.isDebugEnabled()) log.debug("executing " + this);
if (environment==null) {
throw new JbpmException("environment is null");
}
if (signalName!=null) {
if (log.isDebugEnabled()) log.debug("feeding timer signal "+signalName+" into "+execution);
execution.signal(signalName);
}
if (eventName!=null) {
ObservableElement eventSource = execution.getActivity();
if (log.isDebugEnabled()) log.debug("firing event "+signalName+" into "+eventSource);
execution.fire(eventName, eventSource);
}
boolean deleteThisJob = true;
// if there is no repeat on this timer
if (repeat==null) {
// delete the job
if (log.isDebugEnabled()) log.debug("deleting " + this);
DbSession dbSession = environment.get(DbSession.class);
if (dbSession==null) {
throw new JbpmException("no "+DbSession.class.getName()+" in environment");
}
dbSession.delete(this);
} else { // there is a repeat on this timer
deleteThisJob = false;
// suppose that it took the timer runner thread a very long time to execute the timers
// then the repeat action duedate could already have passed
do {
setDueDateDescription(repeat);
} while (duedate.getTime() <= Clock.getCurrentTime().getTime());
if (log.isDebugEnabled()) log.debug("rescheduled "+this+" for "+formatDueDate(duedate));
// release the lock on the timer
release();
// notify the jobExecutor at the end of the transaction
JobExecutor jobExecutor = environment.get(JobExecutor.class);
if (jobExecutor!=null) {
Transaction transaction = environment.get(Transaction.class);
if (transaction==null) {
throw new JbpmException("no transaction in environment");
}
JobAddedNotification jobNotificator = new JobAddedNotification(jobExecutor);
transaction.registerSynchronization(jobNotificator);
}
}
return deleteThisJob;
}
public String toString() {
StringBuilder text = new StringBuilder();
text.append("timer[");
text.append(dbid);
if (duedate!=null) {
text.append("|");
text.append(formatDueDate(duedate));
}
if (signalName!=null) {
text.append("|");
text.append(signalName);
}
if (eventName!=null) {
text.append("|");
text.append(eventName);
}
text.append("]");
return text.toString();
}
public static String formatDueDate(Date date) {
return new SimpleDateFormat(dateFormat).format(date);
}
public String getSignalName() {
return signalName;
}
public void setSignalName(String signalName) {
this.signalName = signalName;
}
public String getEventName() {
return eventName;
}
public void setEventName(String eventName) {
this.eventName = eventName;
}
public String getRepeat() {
return repeat;
}
public void setRepeat(String repeat) {
this.repeat = repeat;
}
}