/*
* *************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
* *************************************************************************************
*/
package com.espertech.esper.core.context.mgr;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.core.context.util.EPStatementAgentInstanceHandle;
import com.espertech.esper.core.service.EPStatementHandleCallback;
import com.espertech.esper.core.service.ExtensionServicesContext;
import com.espertech.esper.core.service.StatementAgentInstanceFilterVersion;
import com.espertech.esper.core.service.StatementContext;
import com.espertech.esper.epl.spec.ContextDetailConditionCrontab;
import com.espertech.esper.pattern.MatchedEventMap;
import com.espertech.esper.schedule.ScheduleComputeHelper;
import com.espertech.esper.schedule.ScheduleHandleCallback;
import com.espertech.esper.schedule.ScheduleSlot;
import java.util.Collections;
public class ContextControllerConditionCrontab implements ContextControllerCondition {
private final StatementContext statementContext;
private final ScheduleSlot scheduleSlot;
private final ContextDetailConditionCrontab spec;
private final ContextControllerConditionCallback callback;
private EPStatementHandleCallback scheduleHandle;
public ContextControllerConditionCrontab(StatementContext statementContext, ScheduleSlot scheduleSlot, ContextDetailConditionCrontab spec, ContextControllerConditionCallback callback) {
this.statementContext = statementContext;
this.scheduleSlot = scheduleSlot;
this.spec = spec;
this.callback = callback;
}
public void activate(EventBean optionalTriggerEvent, MatchedEventMap priorMatches, long timeOffset) {
startContextCallback();
}
public void deactivate() {
endContextCallback();
}
public boolean isRunning() {
return scheduleHandle != null;
}
private void startContextCallback() {
ScheduleHandleCallback scheduleCallback = new ScheduleHandleCallback() {
public void scheduledTrigger(ExtensionServicesContext extensionServicesContext)
{
scheduleHandle = null; // terminates automatically unless scheduled again
callback.rangeNotification(Collections.<String, Object>emptyMap(), ContextControllerConditionCrontab.this, null, null);
}
};
EPStatementAgentInstanceHandle agentHandle = new EPStatementAgentInstanceHandle(statementContext.getEpStatementHandle(), statementContext.getDefaultAgentInstanceLock(), -1, new StatementAgentInstanceFilterVersion());
scheduleHandle = new EPStatementHandleCallback(agentHandle, scheduleCallback);
statementContext.getSchedulingService().add(spec.getSchedule(), scheduleHandle, scheduleSlot);
}
private void endContextCallback() {
if (scheduleHandle!= null) {
statementContext.getSchedulingService().remove(scheduleHandle, scheduleSlot);
}
scheduleHandle = null;
}
public Long getExpectedEndTime() {
return ScheduleComputeHelper.computeNextOccurance(spec.getSchedule(), statementContext.getTimeProvider().getTime());
}
}