object count bolt

import backtype.storm.tuple.Fields;import backtype.storm.tuple.Tuple;import backtype.storm.tuple.Values;import com.newegg.storm.util.TimeUtils;import com.newegg.storm.util.TupleHelpers;/** * receive tuple [time,obj,...] * emit tuple [emitTime, obj, count, ...] * @author bw67 * */public abstract class ObjectCountWithTimeBolt extends ObjectCountBolt {private long startTime;private boolean isFirst = true;private long emitTime;private long tickTimesSinceLastEmit;/** * count the latest windowLength campaign  * and emit the result every emitFrequencyInSeconds * @param outputFields: must match to values returned from method getValuesToEmit * @param windowLengthInSeconds * @param emitFrequencyInSeconds */public ObjectCountWithTimeBolt(Fields outputFields, int windowLengthInSeconds, int emitFrequencyInSeconds){super(outputFields,windowLengthInSeconds,emitFrequencyInSeconds);}public void execute(Tuple input) {if (TupleHelpers.isTickTuple(input)) {tickTimesSinceLastEmit += 1;//if after 2 ticks, emit the last resultif(tickTimesSinceLastEmit >=2){emitCurrentWindowCounts();emitTime += getEmitFrequencyInSeconds() * 1000;tickTimesSinceLastEmit = 0;}}else{long time = getObjectTime(input);//initialize the emitTime by time of the first tuple if(isFirst){emitTime = TimeUtils.floor(time, "mm");tickTimesSinceLastEmit = 0;isFirst = false;}//System.out.println("time=" + TimeUtils.stringOf(time) + ", emitTime=" + TimeUtils.stringOf(emitTime));    //if time of the tuple is over the emit time, then emit the last results and update emit time long d = time -emitTime;if(d >= 0){long n = d / (getEmitFrequencyInSeconds() * 1000);for(int i = 0; i <= n; i++){emitCurrentWindowCounts();emitTime += getEmitFrequencyInSeconds() * 1000;}    tickTimesSinceLastEmit = 0;}    countObjAndAck(input);}    }@Overridepublic void doWhenEmit() {}@Overridepublic Values getValuesToEmit(Object obj, Long count) {return new Values(emitTime,obj,count);}public abstract long getObjectTime(Tuple tuple);}