/*
* Copyright 2009-2016 the original author or authors.
*
* 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.springframework.integration.support.management;
/**
* An implementation of {@link MessageChannelMetrics} that aggregates the total response
* time over a sample, to avoid fetching the system time twice for every message.
*
* @author Gary Russell
* @since 4.2
*/
public class AggregatingMessageChannelMetrics extends DefaultMessageChannelMetrics {
private static final int DEFAULT_SAMPLE_SIZE = 1000;
private final int sampleSize;
private long start;
public AggregatingMessageChannelMetrics() {
this(null, DEFAULT_SAMPLE_SIZE);
}
/**
* Construct an instance with default metrics with {@code window=10, period=1 second,
* lapsePeriod=1 minute}.
* @param name the name.
* @param sampleSize the sample size over which to aggregate the duration.
*/
public AggregatingMessageChannelMetrics(String name, int sampleSize) {
super(name);
this.sampleSize = sampleSize;
}
/**
* Construct an instance with the supplied metrics. For proper representation of metrics, the
* supplied sendDuration must have a {@code factor=1000000.} and the the other arguments
* must be created with the {@code millis} constructor argument set to true.
* @param name the name.
* @param sendDuration an {@link ExponentialMovingAverage} for calculating the send duration.
* @param sendErrorRate an {@link ExponentialMovingAverageRate} for calculating the send error rate.
* @param sendSuccessRatio an {@link ExponentialMovingAverageRatio} for calculating the success ratio.
* @param sendRate an {@link ExponentialMovingAverageRate} for calculating the send rate.
* @param sampleSize the sample size over which to aggregate the duration.
*/
public AggregatingMessageChannelMetrics(String name, ExponentialMovingAverage sendDuration,
ExponentialMovingAverageRate sendErrorRate, ExponentialMovingAverageRatio sendSuccessRatio,
ExponentialMovingAverageRate sendRate, int sampleSize) {
super(name, sendDuration, sendErrorRate, sendSuccessRatio, sendRate);
this.sampleSize = sampleSize;
}
@Override
public synchronized MetricsContext beforeSend() {
long count = this.sendCount.getAndIncrement();
if (isFullStatsEnabled() && count % this.sampleSize == 0) {
this.start = System.nanoTime();
this.sendRate.increment(this.start);
}
return new AggregatingChannelMetricsContext(this.start, count + 1);
}
@Override
public void afterSend(MetricsContext context, boolean result) {
AggregatingChannelMetricsContext aggregatingContext = (AggregatingChannelMetricsContext) context;
long newCount = aggregatingContext.newCount;
if (result) {
if (isFullStatsEnabled() && newCount % this.sampleSize == 0) {
long now = System.nanoTime();
this.sendSuccessRatio.success(now);
this.sendDuration.append(now - aggregatingContext.start);
}
}
else {
if (isFullStatsEnabled() && newCount % this.sampleSize == 0) {
long now = System.nanoTime();
this.sendSuccessRatio.failure(now);
this.sendErrorRate.increment(now);
}
this.sendErrorCount.incrementAndGet();
}
}
protected static class AggregatingChannelMetricsContext extends DefaultChannelMetricsContext {
protected long newCount;
public AggregatingChannelMetricsContext(long start, long newCount) {
super(start);
this.newCount = newCount;
}
}
}