/**
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* Copyright (C) 2007 Bull S. A. S.
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* Bull, Rue Jean Jaures, B.P.68, 78340, Les Clayes-sous-Bois
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* This library is free software; you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Foundation
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* version 2.1 of the License.
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* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public License along with this
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* program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301, USA.
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**/
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package org.jbpm.pvm.internal.jobexecutor;
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import java.util.List;
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import org.hibernate.Query;
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import org.hibernate.Session;
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import org.jbpm.api.Execution;
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import org.jbpm.api.JbpmException;
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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.job.TimerImpl;
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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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/**
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* Timers created with this service are committed at the end of the transaction,
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* so their execution will be late if the delay is shorter than the transaction.
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* In that case, they will be executed at the end of the transaction.
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*
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* @author Tom Baeyens, Pascal Verdage
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*/
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public class JobExecutorTimerSession implements TimerSession {
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private static final Log log = Log.getLog(TimerSession.class.getName());
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/* injected */
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Transaction transaction;
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/* injected */
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JobExecutor jobExecutor;
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/* injected */
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Session session;
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boolean jobExecutorNotificationScheduled = false;
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public void schedule(Timer timer) {
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if (timer == null) throw new JbpmException("null timer scheduled");
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if (timer.getExecution() == null) throw new JbpmException("timer has no execution specified");
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if ((timer.getSignalName() == null) && (timer.getEventName() == null)) throw new JbpmException("timer has no signalName or eventName specified");
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if (timer.getDueDate() == null) throw new JbpmException("timer scheduled at null date");
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log.debug("scheduling " + timer);
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session.save(timer);
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if ( (!jobExecutorNotificationScheduled)
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&& (jobExecutor!=null)
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) {
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jobExecutorNotificationScheduled = true;
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//a transaction is not required (can be null)
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if (transaction != null) {
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transaction.registerSynchronization(new JobAddedNotification(jobExecutor));
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}
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}
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}
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public void cancel(Timer timer) {
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log.debug("canceling " + timer);
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if (timer != null) {
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session.delete(timer);
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} else {
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throw new JbpmException("timer is null");
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}
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}
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public List<Timer> findTimersByExecution(Execution execution) {
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Query query = session.createQuery(
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"select timer " +
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"from "+TimerImpl.class.getName()+" timer " +
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"where timer.execution = :execution"
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);
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query.setEntity("execution", execution);
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return query.list();
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}
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}
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