| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more 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, |
| * 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 com.alibaba.jstorm.common.metric; |
| |
| import com.alibaba.jstorm.common.metric.snapshot.AsmHistogramSnapshot; |
| import com.alibaba.jstorm.common.metric.snapshot.AsmSnapshot; |
| import com.codahale.metrics.ExponentiallyDecayingReservoir; |
| import com.codahale.metrics.Histogram; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * each window has a separate histogram, which is recreated after the window cycle. |
| */ |
| public class AsmHistogram extends AsmMetric<Histogram> { |
| |
| private final Map<Integer, Histogram> histogramMap = new ConcurrentHashMap<Integer, Histogram>(); |
| private Histogram unFlushed = newHistogram(); |
| |
| public AsmHistogram() { |
| super(); |
| for (int win : windowSeconds) { |
| histogramMap.put(win, newHistogram()); |
| } |
| } |
| |
| @Override |
| public void update(Number obj) { |
| if (sample()) { |
| this.unFlushed.update(obj.longValue()); |
| } |
| } |
| |
| @Override |
| public void updateDirectly(Number obj) { |
| this.unFlushed.update(obj.longValue()); |
| } |
| |
| @Override |
| public Map<Integer, Histogram> getWindowMetricMap() { |
| return histogramMap; |
| } |
| |
| @Override |
| public Histogram mkInstance() { |
| return newHistogram(); |
| } |
| |
| @Override |
| protected void updateSnapshot(int window) { |
| Histogram histogram = histogramMap.get(window); |
| if (histogram != null) { |
| AsmSnapshot snapshot = new AsmHistogramSnapshot().setSnapshot(histogram.getSnapshot()) |
| .setTs(System.currentTimeMillis()).setMetricId(metricId); |
| snapshots.put(window, snapshot); |
| } |
| } |
| |
| /** |
| * flush temp histogram data to all windows & assoc metrics. |
| */ |
| protected void doFlush() { |
| long[] values = unFlushed.getSnapshot().getValues(); |
| for (Histogram histogram : histogramMap.values()) { |
| for (long val : values) { |
| histogram.update(val); |
| } |
| } |
| for (long val : values) { |
| for (AsmMetric metric : this.assocMetrics) { |
| metric.updateDirectly(val); |
| } |
| } |
| this.unFlushed = newHistogram(); |
| } |
| |
| @Override |
| public AsmMetric clone() { |
| return new AsmHistogram(); |
| } |
| |
| private Histogram newHistogram() { |
| return new Histogram(new ExponentiallyDecayingReservoir()); |
| } |
| } |