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Elephant Drummer Java Job Scheduler
package com.elephantdrummer.trigger;
import java.util.Calendar;
import java.util.Date;
import java.util.logging.Level;
import com.elephantdrummer.dictionary.DictPeriod;
import com.elephantdrummer.exception.DrummerException;
import com.elephantdrummer.parser.ParserDateMaskToDate;
import com.elephantdrummer.parser.ParserDateMaskToStep;
import com.elephantdrummer.trigger.base.DrumTrigger;
import com.elephantdrummer.trigger.base.TriggerType;
/**
* Copyright 2018 Elephant Software Klaudiusz Wojtkowiak e-mail: [email protected]
*
* 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.
*/
public class EveryTrigger extends DrumTrigger{
public EveryTrigger() {
setStep(DictPeriod.PERIOD_MINUTE);
}
@Override
public String getDescription() {
return "Executes every some time period.";
}
@Override
public Date getNextRunTime( Date currDate) {
Date retVal=null;
try{
retVal= calculateForPeriod(currDate,getStep());
}catch(DrummerException dr){
log.log(Level.SEVERE, ""+dr.getDrummerError().toString()+" - "+dr.getMessage());
}
return retVal;
}
@Override
public final TriggerType getTriggerType() {
return TriggerType.EVERY;
}
protected Date calculateForPeriod(Date currDate,long period) {
if (currDate==null) return null;
if (currDate.before(new Date())){
currDate=new Date();
}
Calendar cal = Calendar.getInstance();
Date next= toNearest(currDate,period,getShift());
if (next.before(currDate)){
cal.setTime(next);
cal.add(Calendar.MILLISECOND,getStep().intValue());
next=cal.getTime();
}
Date from=ParserDateMaskToDate.applyAfterToDate(getAfter(),next);
Date to=ParserDateMaskToDate.applyBeforeToDate(getBefore(),next);
if (to==null==false&&to.before(next)){
next=to;
from=ParserDateMaskToStep.addDateStepToDate(to,next,getBefore());
from=ParserDateMaskToDate.applyAfterToDate(getAfter(),from);
}
if (from==null==false&& next.before(from)){
next=toNearest(from,period);
}
Date nd=new Date();
if (next.before(nd)||next.equals(nd)){
next=toNearest(next,period);
}
return next;
}
private Date toNearest(Date d,long period) {
long roundedtimeMs = Math.round( (double)( (double)d.getTime()/(double)(period) ) ) * period ;
if (roundedtimeMs