Java tutorial
/* * * * RHQ Management Platform * * Copyright (C) 2005-2013 Red Hat, Inc. * * All rights reserved. * * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License, version 2, as * * published by the Free Software Foundation, and/or the GNU Lesser * * General Public License, version 2.1, also as published by the Free * * Software Foundation. * * * * This program is distributed in the hope that it will be useful, * * but WITHOUT ANY WARRANTY; without even the implied warranty of * * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * * GNU General Public License and the GNU Lesser General Public License * * for more details. * * * * You should have received a copy of the GNU General Public License * * and the GNU Lesser General Public License along with this program; * * if not, write to the Free Software Foundation, Inc., * * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ package org.rhq.server.control.command; import java.io.File; import java.util.HashMap; import java.util.Map; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.Options; import org.rhq.server.control.ControlCommand; import org.rhq.server.control.RHQControl; import org.rhq.server.control.RHQControlException; import org.rhq.server.control.util.ExecutorAssist; /** * @author John Sanda */ public class Start extends ControlCommand { private Options options; public Start() { options = new Options().addOption(null, STORAGE_OPTION, false, "Start RHQ storage node") .addOption(null, SERVER_OPTION, false, "Start RHQ server") .addOption(null, AGENT_OPTION, false, "Start RHQ agent"); } @Override public String getName() { return "start"; } @Override public String getDescription() { return "Starts RHQ services."; } @Override public Options getOptions() { return options; } @Override protected String getReadmeFilename() { return "START_README.txt"; } @Override protected int exec(CommandLine commandLine) { int rValue = RHQControl.EXIT_CODE_OK; try { // if no options specified, then start whatever is installed if (commandLine.getOptions().length == 0) { boolean storageInstalled = isStorageInstalled(); boolean serverInstalled = isServerInstalled(); boolean agentInstalled = isAgentInstalled(); if (!(storageInstalled || serverInstalled || agentInstalled)) { log.warn("Nothing to start. No RHQ services are installed."); rValue = RHQControl.EXIT_CODE_NOT_INSTALLED; } else { if (storageInstalled) { rValue = Math.max(rValue, startStorage()); } if (serverInstalled) { rValue = Math.max(rValue, startRHQServer()); } if (agentInstalled) { rValue = Math.max(rValue, startAgent()); } } } else { if (commandLine.hasOption(STORAGE_OPTION)) { if (isStorageInstalled()) { rValue = Math.max(rValue, startStorage()); } else { log.warn("It appears that the storage node is not installed. The --" + STORAGE_OPTION + " option will be ignored."); rValue = RHQControl.EXIT_CODE_NOT_INSTALLED; } } if (commandLine.hasOption(SERVER_OPTION)) { if (isServerInstalled()) { rValue = Math.max(rValue, startRHQServer()); } else { log.warn("It appears that the server is not installed. The --" + SERVER_OPTION + " option will be ignored."); rValue = RHQControl.EXIT_CODE_NOT_INSTALLED; } } if (commandLine.hasOption(AGENT_OPTION)) { if (isAgentInstalled()) { rValue = Math.max(rValue, startAgent()); } else { log.warn("It appears that the agent is not installed. The --" + AGENT_OPTION + " option will be ignored."); rValue = RHQControl.EXIT_CODE_NOT_INSTALLED; } } } } catch (Exception e) { throw new RHQControlException("Failed to start services", e); } return rValue; } private int startStorage() throws Exception { log.debug("Starting RHQ storage node"); org.apache.commons.exec.CommandLine commandLine; int rValue; // Cassandra looks for JAVA_HOME or then defaults to PATH. We want it to use the Java // defined for RHQ, so make sure JAVA_HOME is set, and set to the RHQ Java for the executor // environment. String javaExeFilePath = System.getProperty("rhq.java-exe-file-path"); String javaHome = javaExeFilePath.replace('\\', '/').replace("/bin/java", ""); Map<String, String> env = new HashMap<String, String>(System.getenv()); env.put("JAVA_HOME", javaHome); if (isWindows()) { // Force CASSANDRA_HOME to prevent starting wrong instance of Cassandra (BZ 1069855) env.put("CASSANDRA_HOME", getStorageBasedir().getAbsolutePath()); commandLine = getCommandLine("rhq-storage", "start"); rValue = ExecutorAssist.execute(getBinDir(), commandLine, env); if (rValue != RHQControl.EXIT_CODE_OK) { log.debug("Failed to start storage service, return value" + rValue); } } else { File storageBinDir = new File(getStorageBasedir(), "bin"); File pidFile = getStoragePidFile(); // For now we are duplicating logic in the status command. This code will be // replaced when we implement a rhq-storage.sh script. if (isStorageRunning()) { String pid = getStoragePid(); System.out.println("RHQ storage node (pid " + pid + ") is running"); rValue = RHQControl.EXIT_CODE_OK; } else { // Force CASSANDRA_INCLUDE to prevent starting wrong instance of Cassandra (BZ 1069855) env.put("CASSANDRA_INCLUDE", storageBinDir + File.separator + "cassandra.in.sh"); commandLine = getCommandLine(false, "cassandra", "-p", pidFile.getAbsolutePath()); rValue = ExecutorAssist.execute(storageBinDir, commandLine, env); } } return rValue; } private int startRHQServer() throws Exception { log.debug("Starting RHQ server"); validateServerPropertiesFile(); org.apache.commons.exec.CommandLine commandLine = getCommandLine("rhq-server", "start"); int rValue; if (isWindows()) { try { rValue = ExecutorAssist.execute(getBinDir(), commandLine); } catch (Exception e) { // Ignore, service may not exist or be running, , script returns 1 log.debug("Failed to start server service", e); rValue = RHQControl.EXIT_CODE_OPERATION_FAILED; } } else { rValue = ExecutorAssist.execute(getBinDir(), commandLine); } return rValue; } private int startAgent() throws Exception { log.debug("Starting RHQ agent"); File agentBinDir = new File(getAgentBasedir(), "bin"); org.apache.commons.exec.CommandLine commandLine = getCommandLine("rhq-agent-wrapper", "start"); int rValue; if (isWindows()) { try { rValue = ExecutorAssist.execute(agentBinDir, commandLine); } catch (Exception e) { // Ignore, service may not exist or be running, , script returns 1 log.debug("Failed to start agent service", e); rValue = RHQControl.EXIT_CODE_OPERATION_FAILED; } } else { rValue = ExecutorAssist.execute(agentBinDir, commandLine); } return rValue; } }