org.drools.core.time.impl.CompositeMaxDurationTimer Maven / Gradle / Ivy
/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* 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.core.time.impl;
import org.drools.core.common.InternalWorkingMemory;
import org.drools.core.rule.ConditionalElement;
import org.drools.core.rule.Declaration;
import org.drools.core.spi.Activation;
import org.drools.core.spi.Tuple;
import org.drools.core.time.Trigger;
import org.kie.api.runtime.Calendars;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
/**
* 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 extends BaseTimer
implements
Timer {
private static final long serialVersionUID = -2531364489959820962L;
private List durations;
private Timer timer;
public CompositeMaxDurationTimer() {
}
public Declaration[][] getTimerDeclarations(Map outerDeclrs) {
return null;
}
public void addDurationTimer( final DurationTimer durationTimer ) {
if ( this.durations == null ) {
this.durations = new LinkedList();
}
this.durations.add( durationTimer );
}
public void setTimer( Timer timer ) {
this.timer = timer;
}
public Trigger createTrigger( Activation item, InternalWorkingMemory wm ) {
long timestamp = wm.getTimerService().getCurrentTime();
String[] calendarNames = item.getRule().getCalendars();
Calendars calendars = wm.getCalendars();
return createTrigger( getMaxTimestamp(item.getTuple(), timestamp), calendarNames, calendars );
}
public Trigger createTrigger(long timestamp,
Tuple leftTuple,
DefaultJobHandle jh,
String[] calendarNames,
Calendars calendars,
Declaration[][] declrs,
InternalWorkingMemory wm) {
return createTrigger( getMaxTimestamp(leftTuple, 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( timer != null ? getMaxDuration() + timestamp : timestamp );
return new CompositeMaxDurationTrigger( maxDurationDate,
timer != null ? timer.createTrigger( timestamp,
calendarNames,
calendars ) : null );
}
private long getMaxTimestamp(Tuple leftTuple, long timestamp) {
if (timer != null) {
return timestamp;
}
long result = 0;
for ( DurationTimer durationTimer : durations ) {
result = Math.max( result,
durationTimer.getDuration() + durationTimer.getEventTimestamp(leftTuple, timestamp) );
}
return result;
}
private long getMaxDuration() {
long result = 0;
for ( DurationTimer durationTimer : durations ) {
result = Math.max( result,
durationTimer.getDuration() );
}
return result;
}
@Override
public ConditionalElement clone() {
CompositeMaxDurationTimer clone = new CompositeMaxDurationTimer();
if ( durations != null && !durations.isEmpty() ) {
for ( DurationTimer timer : durations ) {
clone.addDurationTimer(timer);
}
}
if ( timer != null) {
clone.timer = timer;
}
return clone;
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject( durations );
out.writeObject( timer );
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
durations = ( List ) in.readObject();
timer = ( Timer )in.readObject();
}
}