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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/util/MessageTracker.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 * <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.zookeeper.server.util; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.zookeeper.server.quorum.Leader; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This class provides a way of buffering sentBuffer and receivedBuffer messages in order. * It uses EvictingQueue of size BUFFERED_MESSAGE_SIZE to store the messages. * When the queue is full it overrides the oldest in a circular manner. * This class does doe not provide thread safety. */ public class MessageTracker { private static final Logger LOG = LoggerFactory.getLogger(MessageTracker.class); private final CircularBuffer<BufferedMessage> sentBuffer; private final CircularBuffer<BufferedMessage> receivedBuffer; public static final String MESSAGE_TRACKER_BUFFER_SIZE = "zookeeper.messageTracker.BufferSize"; public static final String MESSAGE_TRACKER_ENABLED = "zookeeper.messageTracker.Enabled"; public static final int BUFFERED_MESSAGE_SIZE; private static final boolean enabled; static { BUFFERED_MESSAGE_SIZE = Integer.getInteger(MESSAGE_TRACKER_BUFFER_SIZE, 10); enabled = Boolean.getBoolean(MESSAGE_TRACKER_ENABLED); } public MessageTracker(int buffer_size) { this.sentBuffer = new CircularBuffer<>(BufferedMessage.class, buffer_size); this.receivedBuffer = new CircularBuffer<>(BufferedMessage.class, buffer_size); } public void trackSent(long timestamp) { if (enabled) { sentBuffer.write(new BufferedMessage(timestamp)); } } public void trackSent(int packetType) { if (enabled) { sentBuffer.write(new BufferedMessage(packetType)); } } public void trackReceived(long timestamp) { if (enabled) { receivedBuffer.write(new BufferedMessage(timestamp)); } } public void trackReceived(int packetType) { if (enabled) { receivedBuffer.write(new BufferedMessage(packetType)); } } public final BufferedMessage peekSent() { return sentBuffer.peek(); } public final BufferedMessage peekReceived() { return receivedBuffer.peek(); } public final long peekSentTimestamp() { return enabled ? sentBuffer.peek().getTimestamp() : 0; } public final long peekReceivedTimestamp() { return enabled ? receivedBuffer.peek().getTimestamp() : 0; } public void dumpToLog(String serverAddress) { if (!enabled) { return; } logMessages(serverAddress, receivedBuffer, Direction.RECEIVED); logMessages(serverAddress, sentBuffer, Direction.SENT); } private static void logMessages( String serverAddr, CircularBuffer<BufferedMessage> messages, Direction direction) { String sentOrReceivedText = direction == Direction.SENT ? "sentBuffer to" : "receivedBuffer from"; if (messages.isEmpty()) { LOG.info("No buffered timestamps for messages {} {}", sentOrReceivedText, serverAddr); } else { LOG.warn("Last {} timestamps for messages {} {}:", messages.size(), sentOrReceivedText, serverAddr); while (!messages.isEmpty()) { LOG.warn("{} {} {}", sentOrReceivedText, serverAddr, messages.take().toString()); } } } /** * Direction for message track. */ private enum Direction { SENT, RECEIVED } private static class BufferedMessage { private long timestamp; private int messageType; private long getTimestamp() { return timestamp; } BufferedMessage(int messageType) { this.messageType = messageType; this.timestamp = System.currentTimeMillis(); } BufferedMessage(long timestamp) { this.messageType = -1; this.timestamp = timestamp; } @Override /** * ToString examples are as follows: * TimeStamp: 2016-06-06 11:07:58,594 Type: PROPOSAL * TimeStamp: 2016-06-06 11:07:58,187 */ public String toString() { if (messageType == -1) { return "TimeStamp: " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS") .format(new Date(timestamp)); } else { return "TimeStamp: " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS") .format(new Date(timestamp)) + " Type: " + Leader.getPacketType(messageType); } } } }
⏎ org/apache/zookeeper/server/util/MessageTracker.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, 13679👍, 0💬
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