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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/admin/JettyAdminServer.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.admin; import java.io.IOException; import java.security.GeneralSecurityException; import java.security.KeyStore; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.stream.Collectors; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.zookeeper.common.QuorumX509Util; import org.apache.zookeeper.common.SecretUtils; import org.apache.zookeeper.common.X509Util; import org.apache.zookeeper.server.ZooKeeperServer; import org.eclipse.jetty.http.HttpVersion; import org.eclipse.jetty.security.ConstraintMapping; import org.eclipse.jetty.security.ConstraintSecurityHandler; import org.eclipse.jetty.server.HttpConfiguration; import org.eclipse.jetty.server.HttpConnectionFactory; import org.eclipse.jetty.server.SecureRequestCustomizer; import org.eclipse.jetty.server.Server; import org.eclipse.jetty.server.ServerConnector; import org.eclipse.jetty.server.SslConnectionFactory; import org.eclipse.jetty.servlet.ServletContextHandler; import org.eclipse.jetty.servlet.ServletHolder; import org.eclipse.jetty.util.security.Constraint; import org.eclipse.jetty.util.ssl.SslContextFactory; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * This class encapsulates a Jetty server for running Commands. * * Given the default settings, start a ZooKeeper server and visit * http://hostname:8080/commands for links to all registered commands. Visiting * http://hostname:8080/commands/commandname will execute the associated * Command and return the result in the body of the response. Any keyword * arguments to the command are specified with URL parameters (e.g., * http://localhost:8080/commands/set_trace_mask?traceMask=306). * * @see Commands * @see CommandOutputter */ public class JettyAdminServer implements AdminServer { static final Logger LOG = LoggerFactory.getLogger(JettyAdminServer.class); public static final int DEFAULT_PORT = 8080; public static final int DEFAULT_IDLE_TIMEOUT = 30000; public static final String DEFAULT_COMMAND_URL = "/commands"; private static final String DEFAULT_ADDRESS = "0.0.0.0"; public static final int DEFAULT_STS_MAX_AGE = 1 * 24 * 60 * 60; // seconds in a day public static final int DEFAULT_HTTP_VERSION = 11; // based on HttpVersion.java in jetty private final Server server; private final String address; private final int port; private final int idleTimeout; private final String commandUrl; private ZooKeeperServer zkServer; public JettyAdminServer() throws AdminServerException, IOException, GeneralSecurityException { this( System.getProperty("zookeeper.admin.serverAddress", DEFAULT_ADDRESS), Integer.getInteger("zookeeper.admin.serverPort", DEFAULT_PORT), Integer.getInteger("zookeeper.admin.idleTimeout", DEFAULT_IDLE_TIMEOUT), System.getProperty("zookeeper.admin.commandURL", DEFAULT_COMMAND_URL), Integer.getInteger("zookeeper.admin.httpVersion", DEFAULT_HTTP_VERSION), Boolean.getBoolean("zookeeper.admin.portUnification"), Boolean.getBoolean("zookeeper.admin.forceHttps")); } public JettyAdminServer( String address, int port, int timeout, String commandUrl, int httpVersion, boolean portUnification, boolean forceHttps) throws IOException, GeneralSecurityException { this.port = port; this.idleTimeout = timeout; this.commandUrl = commandUrl; this.address = address; server = new Server(); ServerConnector connector = null; if (!portUnification && !forceHttps) { connector = new ServerConnector(server); } else { SecureRequestCustomizer customizer = new SecureRequestCustomizer(); customizer.setStsMaxAge(DEFAULT_STS_MAX_AGE); customizer.setStsIncludeSubDomains(true); HttpConfiguration config = new HttpConfiguration(); config.setSecureScheme("https"); config.addCustomizer(customizer); try (QuorumX509Util x509Util = new QuorumX509Util()) { String privateKeyType = System.getProperty(x509Util.getSslKeystoreTypeProperty(), ""); String privateKeyPath = System.getProperty(x509Util.getSslKeystoreLocationProperty(), ""); String privateKeyPassword = getPasswordFromSystemPropertyOrFile( x509Util.getSslKeystorePasswdProperty(), x509Util.getSslKeystorePasswdPathProperty()); String certAuthType = System.getProperty(x509Util.getSslTruststoreTypeProperty(), ""); String certAuthPath = System.getProperty(x509Util.getSslTruststoreLocationProperty(), ""); String certAuthPassword = getPasswordFromSystemPropertyOrFile( x509Util.getSslTruststorePasswdProperty(), x509Util.getSslTruststorePasswdPathProperty()); KeyStore keyStore = null, trustStore = null; try { keyStore = X509Util.loadKeyStore(privateKeyPath, privateKeyPassword, privateKeyType); trustStore = X509Util.loadTrustStore(certAuthPath, certAuthPassword, certAuthType); LOG.info("Successfully loaded private key from {}", privateKeyPath); LOG.info("Successfully loaded certificate authority from {}", certAuthPath); } catch (Exception e) { LOG.error("Failed to load authentication certificates for admin server.", e); throw e; } SslContextFactory sslContextFactory = new SslContextFactory.Server(); sslContextFactory.setKeyStore(keyStore); sslContextFactory.setKeyStorePassword(privateKeyPassword); sslContextFactory.setTrustStore(trustStore); sslContextFactory.setTrustStorePassword(certAuthPassword); if (forceHttps) { connector = new ServerConnector(server, new SslConnectionFactory(sslContextFactory, HttpVersion.fromVersion(httpVersion).asString()), new HttpConnectionFactory(config)); } else { connector = new ServerConnector( server, new UnifiedConnectionFactory(sslContextFactory, HttpVersion.fromVersion(httpVersion).asString()), new HttpConnectionFactory(config)); } } } connector.setHost(address); connector.setPort(port); connector.setIdleTimeout(idleTimeout); server.addConnector(connector); ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS); context.setContextPath("/*"); constrainTraceMethod(context); server.setHandler(context); context.addServlet(new ServletHolder(new CommandServlet()), commandUrl + "/*"); } /** * Start the embedded Jetty server. */ @Override public void start() throws AdminServerException { try { server.start(); } catch (Exception e) { // Server.start() only throws Exception, so let's at least wrap it // in an identifiable subclass String message = String.format( "Problem starting AdminServer on address %s, port %d and command URL %s", address, port, commandUrl); throw new AdminServerException(message, e); } LOG.info("Started AdminServer on address {}, port {} and command URL {}", address, port, commandUrl); } /** * Stop the embedded Jetty server. * * This is not very important except for tests where multiple * JettyAdminServers are started and may try to bind to the same ports if * previous servers aren't shut down. */ @Override public void shutdown() throws AdminServerException { try { server.stop(); } catch (Exception e) { String message = String.format( "Problem stopping AdminServer on address %s, port %d and command URL %s", address, port, commandUrl); throw new AdminServerException(message, e); } } /** * Set the ZooKeeperServer that will be used to run Commands. * * It is not necessary to set the ZK server before calling * AdminServer.start(), and the ZK server can be set to null when, e.g., * that server is being shut down. If the ZK server is not set or set to * null, the AdminServer will still be able to issue Commands, but they will * return an error until a ZK server is set. */ @Override public void setZooKeeperServer(ZooKeeperServer zkServer) { this.zkServer = zkServer; } private class CommandServlet extends HttpServlet { private static final long serialVersionUID = 1L; protected void doGet( HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // Capture the command name from the URL String cmd = request.getPathInfo(); if (cmd == null || cmd.equals("/")) { // No command specified, print links to all commands instead for (String link : commandLinks()) { response.getWriter().println(link); response.getWriter().println("<br/>"); } return; } // Strip leading "/" cmd = cmd.substring(1); // Extract keyword arguments to command from request parameters @SuppressWarnings("unchecked") Map<String, String[]> parameterMap = request.getParameterMap(); Map<String, String> kwargs = new HashMap<String, String>(); for (Map.Entry<String, String[]> entry : parameterMap.entrySet()) { kwargs.put(entry.getKey(), entry.getValue()[0]); } // Run the command CommandResponse cmdResponse = Commands.runCommand(cmd, zkServer, kwargs); // Format and print the output of the command CommandOutputter outputter = new JsonOutputter(); response.setStatus(HttpServletResponse.SC_OK); response.setContentType(outputter.getContentType()); outputter.output(cmdResponse, response.getWriter()); } } /** * Returns a list of URLs to each registered Command. */ private List<String> commandLinks() { return Commands.getPrimaryNames().stream().sorted().map(command -> String.format("<a href=\"%s\">%s</a>", commandUrl + "/" + command , command)).collect(Collectors.toList()); } /** * Add constraint to a given context to disallow TRACE method * @param ctxHandler the context to modify */ private void constrainTraceMethod(ServletContextHandler ctxHandler) { Constraint c = new Constraint(); c.setAuthenticate(true); ConstraintMapping cmt = new ConstraintMapping(); cmt.setConstraint(c); cmt.setMethod("TRACE"); cmt.setPathSpec("/*"); ConstraintSecurityHandler securityHandler = new ConstraintSecurityHandler(); securityHandler.setConstraintMappings(new ConstraintMapping[] {cmt}); ctxHandler.setSecurityHandler(securityHandler); } /** * Returns the password specified by the given property or stored in the file specified by the * given path property. If both are specified, the password stored in the file will be returned. * @param propertyName the name of the property * @param pathPropertyName the name of the path property * @return password value */ private String getPasswordFromSystemPropertyOrFile(final String propertyName, final String pathPropertyName) { String value = System.getProperty(propertyName, ""); final String pathValue = System.getProperty(pathPropertyName, ""); if (!pathValue.isEmpty()) { value = String.valueOf(SecretUtils.readSecret(pathValue)); } return value; } }
⏎ org/apache/zookeeper/server/admin/JettyAdminServer.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, 13093👍, 0💬
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