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Apache ZooKeeper Server Source Code
Apache ZooKeeper is an open-source server which enables highly reliable distributed coordination.
Apache ZooKeeper Server Source Code files are provided in the source package file, apache-zookeeper-3.8.0.tar.gz.
You can download apache-zookeeper-3.8.0.tar.gz as described in the previous tutorial and go to the "zookeeper-server" sub-folder to view Apache ZooKeeper Server Source Code files.
You can also browse Apache ZooKeeper Server Source Code below:
✍: FYIcenter.com
⏎ org/apache/zookeeper/server/metric/AvgMinMaxCounter.java
/* * 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 org.apache.zookeeper.server.metric; import java.math.BigDecimal; import java.math.RoundingMode; import java.util.LinkedHashMap; import java.util.Map; import java.util.concurrent.atomic.AtomicLong; import org.apache.zookeeper.metrics.Summary; /** * Generic long counter that keep track of min/max/avg. The counter is * thread-safe */ public class AvgMinMaxCounter extends Metric implements Summary { private final String name; private final AtomicLong total = new AtomicLong(); private final AtomicLong min = new AtomicLong(Long.MAX_VALUE); private final AtomicLong max = new AtomicLong(Long.MIN_VALUE); private final AtomicLong count = new AtomicLong(); public AvgMinMaxCounter(String name) { this.name = name; } public void addDataPoint(long value) { total.addAndGet(value); count.incrementAndGet(); setMin(value); setMax(value); } private void setMax(long value) { long current; while (value > (current = max.get()) && !max.compareAndSet(current, value)) { // no op } } private void setMin(long value) { long current; while (value < (current = min.get()) && !min.compareAndSet(current, value)) { // no op } } public double getAvg() { // There is possible race-condition but we don't need the stats to be // extremely accurate. long currentCount = count.get(); long currentTotal = total.get(); if (currentCount > 0) { double avgLatency = currentTotal / (double) currentCount; BigDecimal bg = new BigDecimal(avgLatency); return bg.setScale(4, RoundingMode.HALF_UP).doubleValue(); } return 0; } public long getCount() { return count.get(); } public long getMax() { long current = max.get(); return (current == Long.MIN_VALUE) ? 0 : current; } public long getMin() { long current = min.get(); return (current == Long.MAX_VALUE) ? 0 : current; } public long getTotal() { return total.get(); } public void resetMax() { max.set(getMin()); } public void reset() { count.set(0); total.set(0); min.set(Long.MAX_VALUE); max.set(Long.MIN_VALUE); } public void add(long value) { addDataPoint(value); } public Map<String, Object> values() { Map<String, Object> m = new LinkedHashMap<String, Object>(); m.put("avg_" + name, this.getAvg()); m.put("min_" + name, this.getMin()); m.put("max_" + name, this.getMax()); m.put("cnt_" + name, this.getCount()); m.put("sum_" + name, this.getTotal()); return m; } }
⏎ org/apache/zookeeper/server/metric/AvgMinMaxCounter.java
Or download all of them as a single archive file:
File name: zookeeper-server-3.8.0-fyi.zip File size: 885581 bytes Release date: 2022-02-25 Download
⇒ Apache ZooKeeper Jute Source Code
⇐ Download and Install Apache ZooKeeper Source Package
2022-11-16, 13661👍, 0💬
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