/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.time.impl;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import org.drools.WorkingMemory;
import org.drools.common.InternalWorkingMemory;
import org.drools.runtime.Calendars;
import org.drools.spi.Activation;
import org.drools.time.Trigger;
/**
* While a rule might have multiple DurationTimers, due to LHS CEP rules, there can only ever
* be one timer attribute. Duration rules should be considered a priority over the one timer rule.
* So the Timer cannot fire, until the maximum duration has passed.
*/
public class CompositeMaxDurationTimer
implements
Timer {
private static final long serialVersionUID = -2531364489959820962L;
private List<DurationTimer> durations;
private Timer timer;
public CompositeMaxDurationTimer() {
}
public void addDurationTimer( final DurationTimer durationTimer ) {
if ( this.durations == null ) {
this.durations = new LinkedList<DurationTimer>();
}
this.durations.add( durationTimer );
}
public void setTimer( Timer timer ) {
this.timer = timer;
}
public Trigger createTrigger( Activation item, WorkingMemory wm ) {
long timestamp = ((InternalWorkingMemory) wm).getTimerService().getCurrentTime();
String[] calendarNames = item.getRule().getCalendars();
Calendars calendars = ((InternalWorkingMemory) wm).getCalendars();
return createTrigger( timestamp, calendarNames, calendars );
}
public Trigger createTrigger( long timestamp, // current time
String[] calendarNames,
Calendars calendars ) {
if ( this.durations == null ) {
throw new IllegalStateException( "CompositeMaxDurationTimer cannot have no durations" );
}
Date maxDurationDate = new Date( getMaxDuration() + timestamp );
return new CompositeMaxDurationTrigger( maxDurationDate,
timer != null ? timer.createTrigger( timestamp,
calendarNames,
calendars ) : null,
calendarNames,
calendars );
}
private long getMaxDuration() {
long result = 0;
for ( DurationTimer durationTimer : durations ) {
result = Math.max( result,
durationTimer.getDuration() );
}
return result;
}
}