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