| /** |
| * 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.old.window; |
| |
| import com.alibaba.jstorm.common.metric.old.operator.Sampling; |
| import com.alibaba.jstorm.common.metric.old.operator.StartTime; |
| import com.alibaba.jstorm.common.metric.old.operator.merger.Merger; |
| import com.alibaba.jstorm.common.metric.old.operator.updater.Updater; |
| import com.alibaba.jstorm.utils.IntervalCheck; |
| import com.alibaba.jstorm.utils.TimeUtils; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.TreeMap; |
| |
| public class RollingWindow<V> implements Sampling<V>, StartTime { |
| private static final long serialVersionUID = 3794478417380003279L; |
| private static final Logger LOG = LoggerFactory.getLogger(RollingWindow.class); |
| |
| protected long startTime; |
| protected Integer currBucketTime; |
| protected int interval; // unit is second |
| protected int windowSecond; |
| protected IntervalCheck intervalCheck; |
| |
| protected TreeMap<Integer, V> buckets; |
| protected Integer bucketNum; |
| protected V unflushed; |
| protected V defaultValue; |
| |
| protected Updater<V> updater; |
| protected Merger<V> merger; |
| |
| RollingWindow(V defaultValue, int interval, int windowSecond, Updater<V> updater, Merger<V> merger) { |
| this.startTime = System.currentTimeMillis(); |
| this.interval = interval; |
| this.intervalCheck = new IntervalCheck(); |
| this.intervalCheck.setInterval(interval); |
| this.currBucketTime = getCurrBucketTime(); |
| |
| this.bucketNum = windowSecond / interval; |
| this.windowSecond = (bucketNum) * interval; |
| |
| this.buckets = new TreeMap<Integer, V>(); |
| |
| this.updater = updater; |
| this.merger = merger; |
| |
| this.defaultValue = defaultValue; |
| |
| } |
| |
| @Override |
| public void update(Number obj) { |
| // TODO Auto-generated method stub |
| |
| if (intervalCheck.check()) { |
| rolling(); |
| } |
| synchronized (this) { |
| unflushed = updater.update(obj, unflushed); |
| |
| } |
| |
| } |
| |
| /** |
| * In order to improve performance Flush one batch to rollingWindow |
| * |
| */ |
| public void updateBatch(V batch) { |
| |
| if (intervalCheck.check()) { |
| rolling(); |
| } |
| synchronized (this) { |
| unflushed = updater.updateBatch(batch, unflushed); |
| } |
| |
| } |
| |
| @Override |
| public V getSnapshot() { |
| // TODO Auto-generated method stub |
| if (intervalCheck.check()) { |
| rolling(); |
| } |
| |
| cleanExpiredBuckets(); |
| // @@@ Testing |
| // LOG.info("Raw Data:" + buckets + ",unflushed:" + unflushed); |
| |
| Collection<V> values = buckets.values(); |
| |
| V ret = merger.merge(values, unflushed, this); |
| if (ret == null) { |
| |
| // @@@ testing |
| // LOG.warn("!!!!Exist null data !!!!!"); |
| return defaultValue; |
| } |
| return ret; |
| } |
| |
| /* |
| * Move the "current bucket time" index and clean the expired buckets |
| */ |
| protected void rolling() { |
| synchronized (this) { |
| if (unflushed != null) { |
| buckets.put(currBucketTime, unflushed); |
| unflushed = null; |
| } |
| |
| currBucketTime = getCurrBucketTime(); |
| |
| return; |
| } |
| } |
| |
| protected void cleanExpiredBuckets() { |
| int nowSec = TimeUtils.current_time_secs(); |
| int startRemove = nowSec - (interval - 1) - windowSecond; |
| |
| List<Integer> removeList = new ArrayList<Integer>(); |
| |
| for (Integer keyTime : buckets.keySet()) { |
| if (keyTime < startRemove) { |
| removeList.add(keyTime); |
| } else if (keyTime >= startRemove) { |
| break; |
| } |
| } |
| |
| for (Integer removeKey : removeList) { |
| buckets.remove(removeKey); |
| // @@@ Testing |
| // LOG.info("Remove key:" + removeKey + ", diff:" + (nowSec - removeKey)); |
| |
| } |
| |
| if (buckets.isEmpty() == false) { |
| Integer first = buckets.firstKey(); |
| startTime = first.longValue() * 1000; |
| } |
| } |
| |
| public int getWindowSecond() { |
| return windowSecond; |
| } |
| |
| public long getStartTime() { |
| return startTime; |
| } |
| |
| public int getInterval() { |
| return interval; |
| } |
| |
| public Integer getBucketNum() { |
| return bucketNum; |
| } |
| |
| public V getDefaultValue() { |
| return defaultValue; |
| } |
| |
| private Integer getCurrBucketTime() { |
| return (TimeUtils.current_time_secs() / interval) * interval; |
| } |
| } |