stream.monitor.AverageThroughput Maven / Gradle / Ivy
/**
*
*/
package stream.monitor;
import java.util.concurrent.atomic.AtomicLong;
import stream.Data;
import stream.ProcessorList;
import stream.annotations.Description;
import stream.data.Statistics;
import stream.statistics.StatisticsService;
/**
* @author chris
*
*/
@Description(group = "Streams.Monitoring", text = "Measures the time per item of inner processors")
public class AverageThroughput extends ProcessorList implements
StatisticsService {
AtomicLong nanoTime = new AtomicLong(0L);
AtomicLong itemsProcessed = new AtomicLong(0L);
/**
* @see stream.ProcessorList#process(stream.Data)
*/
@Override
public Data process(Data input) {
long start = System.currentTimeMillis();
Data processed = super.process(input);
long duration = System.currentTimeMillis() - start;
nanoTime.addAndGet(duration);
itemsProcessed.incrementAndGet();
return processed;
}
/**
* @see stream.service.Service#reset()
*/
@Override
public void reset() throws Exception {
nanoTime.set(0L);
itemsProcessed.set(0L);
}
/**
* @see stream.statistics.StatisticsService#getStatistics()
*/
@Override
public Statistics getStatistics() {
Statistics stats = new Statistics();
Double time = nanoTime.doubleValue();
Double items = itemsProcessed.doubleValue();
/*
* Double rate = 0.0; if (time > 0.0d) { rate = items / time / 1000L; }
*/
stats.setName("Average Throughput");
stats.put("@avg:milliseconds-per-item", time / items);
return stats;
}
}
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