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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/client/FourLetterWordMain.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.client; import static java.nio.charset.StandardCharsets.UTF_8; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.Socket; import java.net.SocketTimeoutException; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import javax.net.ssl.SSLSocketFactory; import org.apache.yetus.audience.InterfaceAudience; import org.apache.zookeeper.common.ClientX509Util; import org.apache.zookeeper.common.X509Exception.SSLContextException; import org.apache.zookeeper.common.X509Util; import org.slf4j.Logger; import org.slf4j.LoggerFactory; @InterfaceAudience.Public public class FourLetterWordMain { //in milliseconds, socket should connect/read within this period otherwise SocketTimeoutException private static final int DEFAULT_SOCKET_TIMEOUT = 5000; protected static final Logger LOG = LoggerFactory.getLogger(FourLetterWordMain.class); /** * Send the 4letterword * @param host the destination host * @param port the destination port * @param cmd the 4letterword * @return server response * @throws java.io.IOException * @throws SSLContextException */ public static String send4LetterWord(String host, int port, String cmd) throws IOException, SSLContextException { return send4LetterWord(host, port, cmd, false, DEFAULT_SOCKET_TIMEOUT); } /** * Send the 4letterword * @param host the destination host * @param port the destination port * @param cmd the 4letterword * @param secure whether to use SSL * @return server response * @throws java.io.IOException * @throws SSLContextException */ public static String send4LetterWord( String host, int port, String cmd, boolean secure) throws IOException, SSLContextException { return send4LetterWord(host, port, cmd, secure, DEFAULT_SOCKET_TIMEOUT); } /** * Send the 4letterword * @param host the destination host * @param port the destination port * @param cmd the 4letterword * @param secure whether to use SSL * @param timeout in milliseconds, maximum time to wait while connecting/reading data * @return server response * @throws java.io.IOException * @throws SSLContextException */ public static String send4LetterWord( String host, int port, String cmd, boolean secure, int timeout) throws IOException, SSLContextException { LOG.info("connecting to {} {}", host, port); Socket sock; InetSocketAddress hostaddress = host != null ? new InetSocketAddress(host, port) : new InetSocketAddress(InetAddress.getByName(null), port); if (secure) { LOG.info("using secure socket"); try (X509Util x509Util = new ClientX509Util()) { SSLContext sslContext = x509Util.getDefaultSSLContext(); SSLSocketFactory socketFactory = sslContext.getSocketFactory(); SSLSocket sslSock = (SSLSocket) socketFactory.createSocket(); sslSock.connect(hostaddress, timeout); sslSock.startHandshake(); sock = sslSock; } } else { sock = new Socket(); sock.connect(hostaddress, timeout); } sock.setSoTimeout(timeout); BufferedReader reader = null; try { OutputStream outstream = sock.getOutputStream(); outstream.write(cmd.getBytes(UTF_8)); outstream.flush(); // this replicates NC - close the output stream before reading if (!secure) { // SSL prohibits unilateral half-close sock.shutdownOutput(); } reader = new BufferedReader(new InputStreamReader(sock.getInputStream())); StringBuilder sb = new StringBuilder(); String line; while ((line = reader.readLine()) != null) { sb.append(line).append("\n"); } return sb.toString(); } catch (SocketTimeoutException e) { throw new IOException("Exception while executing four letter word: " + cmd, e); } finally { sock.close(); if (reader != null) { reader.close(); } } } public static void main(String[] args) throws IOException, SSLContextException { if (args.length == 3) { System.out.println(send4LetterWord(args[0], Integer.parseInt(args[1]), args[2])); } else if (args.length == 4) { System.out.println(send4LetterWord(args[0], Integer.parseInt(args[1]), args[2], Boolean.parseBoolean(args[3]))); } else { System.out.println("Usage: FourLetterWordMain <host> <port> <cmd> <secure(optional)>"); } } }
⏎ org/apache/zookeeper/client/FourLetterWordMain.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, 13137👍, 0💬
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