org.codelibs.elasticsearch.taste.eval.StatsCallable Maven / Gradle / Ivy
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* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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,
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package org.codelibs.elasticsearch.taste.eval;
import java.util.concurrent.Callable;
import java.util.concurrent.atomic.AtomicInteger;
import org.codelibs.elasticsearch.taste.common.RunningAverageAndStdDev;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class StatsCallable implements Callable {
private static final Logger log = LoggerFactory
.getLogger(StatsCallable.class);
private final Callable delegate;
private final boolean logStats;
private final RunningAverageAndStdDev timing;
private final AtomicInteger noEstimateCounter;
StatsCallable(final Callable delegate, final boolean logStats,
final RunningAverageAndStdDev timing,
final AtomicInteger noEstimateCounter) {
this.delegate = delegate;
this.logStats = logStats;
this.timing = timing;
this.noEstimateCounter = noEstimateCounter;
}
@Override
public Void call() throws Exception {
final long start = System.currentTimeMillis();
delegate.call();
final long end = System.currentTimeMillis();
timing.addDatum(end - start);
if (logStats) {
final Runtime runtime = Runtime.getRuntime();
final int average = (int) timing.getAverage();
log.info("Average time per recommendation: {}ms", average);
final long totalMemory = runtime.totalMemory();
final long memory = totalMemory - runtime.freeMemory();
log.info("Approximate memory used: {}MB / {}MB", memory / 1000000L,
totalMemory / 1000000L);
log.info("Unable to recommend in {} cases", noEstimateCounter.get());
}
return null;
}
}