/*
* Copyright (C) 2008 Jive Software. All rights reserved.
*
* 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.jivesoftware.openfire.reporting.stats;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.HashMap;
import java.util.Map;
import org.jivesoftware.openfire.stats.Statistic;
import org.jivesoftware.openfire.stats.StatisticsManager;
import org.jivesoftware.util.cache.ClusterTask;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Command that will be executed in each cluster node (except the invoker) to
* collect samples of statistics that keep track information that is local to
* the cluster node. Statistics that are able to gather the sample from all the
* cluster nodes are ignored by this command.
*
* @author Gaston Dombiak
*/
public class GetStatistics implements ClusterTask<Map<String, Double>> {
private static final Logger Log = LoggerFactory.getLogger(GetStatistics.class);
private Map<String, Double> samples;
public Map<String, Double> getResult() {
return samples;
}
public void run() {
samples = new HashMap<String, Double>();
for (Map.Entry<String, Statistic> statisticEntry : StatisticsManager.getInstance().getAllStatistics()) {
String key = statisticEntry.getKey();
Statistic statistic = statisticEntry.getValue();
// Only sample statistics that keep info of the cluster node and not the entire cluster
if (statistic.isPartialSample()) {
double statSample = sampleStat(key, statistic);
// Store sample result
samples.put(key, statSample);
}
}
}
public void writeExternal(ObjectOutput out) throws IOException {
// Ignore
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
// Ignore
}
/**
* Profiles the sampling to make sure that it does not take longer than half a second to
* complete, if it does, a warning is logged.
*
* @param statKey the key related to the statistic.
* @param statistic the statistic to be sampled.
* @return the sample.
*/
private double sampleStat(String statKey, Statistic statistic) {
long start = System.currentTimeMillis();
double sample = statistic.sample();
if (System.currentTimeMillis() - start >= 500) {
Log.warn("Stat " + statKey + " took longer than a second to sample.");
}
return sample;
}
}