| /** |
| * 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 |
| * <p/> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p/> |
| * 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.apache.storm.metric.internal; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| /** |
| * Keeps track of approximate latency for the last 10 mins, 3 hours, 1 day, and all time. for |
| * the same keys |
| */ |
| public class MultiLatencyStat<T> { |
| private final int numBuckets; |
| private ConcurrentHashMap<T, LatencyStat> lat = new ConcurrentHashMap<>(); |
| |
| /** |
| * Constructor. |
| * |
| * @param numBuckets the number of buckets to divide the time periods into. |
| */ |
| public MultiLatencyStat(int numBuckets) { |
| this.numBuckets = numBuckets; |
| } |
| |
| LatencyStat get(T key) { |
| LatencyStat c = lat.get(key); |
| if (c == null) { |
| synchronized (this) { |
| c = lat.get(key); |
| if (c == null) { |
| c = new LatencyStat(numBuckets); |
| lat.put(key, c); |
| } |
| } |
| } |
| return c; |
| } |
| |
| /** |
| * Record a latency value. |
| * |
| * @param latency the measurement to record |
| */ |
| public void record(T key, long latency) { |
| get(key).record(latency); |
| } |
| |
| public Map<String, Map<T, Double>> getTimeLatAvg() { |
| Map<String, Map<T, Double>> ret = new HashMap<>(); |
| for (Map.Entry<T, LatencyStat> entry : lat.entrySet()) { |
| T key = entry.getKey(); |
| Map<String, Double> toFlip = entry.getValue().getTimeLatAvg(); |
| for (Map.Entry<String, Double> subEntry : toFlip.entrySet()) { |
| String time = subEntry.getKey(); |
| Map<T, Double> tmp = ret.get(time); |
| if (tmp == null) { |
| tmp = new HashMap<>(); |
| ret.put(time, tmp); |
| } |
| tmp.put(key, subEntry.getValue()); |
| } |
| } |
| return ret; |
| } |
| |
| public void close() { |
| for (LatencyStat l : lat.values()) { |
| l.close(); |
| } |
| } |
| } |