Mercurial > hg > release > thermostat-0.4
view agent/cli/src/main/java/com/redhat/thermostat/agent/cli/AgentApplication.java @ 650:486a299ab905
Move command descriptions to properties file
Reviewed-by: sgehwolf
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2012-September/003394.html
author | Jon VanAlten <vanaltj@gmail.com> |
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date | Tue, 02 Oct 2012 17:43:37 -0400 |
parents | 73c182a706fc |
children | 205565370bab |
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/* * Copyright 2012 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.agent.cli; import java.util.concurrent.CountDownLatch; import java.util.logging.Level; import java.util.logging.Logger; import org.apache.commons.cli.Options; import com.redhat.thermostat.agent.Agent; import com.redhat.thermostat.agent.command.ConfigurationServer; import com.redhat.thermostat.agent.config.AgentConfigsUtils; import com.redhat.thermostat.agent.config.AgentOptionParser; import com.redhat.thermostat.agent.config.AgentStartupConfiguration; import com.redhat.thermostat.backend.BackendLoadException; import com.redhat.thermostat.backend.BackendRegistry; import com.redhat.thermostat.common.Constants; import com.redhat.thermostat.common.LaunchException; import com.redhat.thermostat.common.ThreadPoolTimerFactory; import com.redhat.thermostat.common.TimerFactory; import com.redhat.thermostat.common.appctx.ApplicationContext; import com.redhat.thermostat.common.cli.Arguments; import com.redhat.thermostat.common.cli.CommandContext; import com.redhat.thermostat.common.cli.CommandException; import com.redhat.thermostat.common.config.InvalidConfigurationException; import com.redhat.thermostat.common.dao.AgentInfoDAO; import com.redhat.thermostat.common.dao.BackendInfoDAO; import com.redhat.thermostat.common.dao.DAOFactory; import com.redhat.thermostat.common.dao.HostInfoDAO; import com.redhat.thermostat.common.dao.MongoDAOFactory; import com.redhat.thermostat.common.dao.NetworkInterfaceInfoDAO; import com.redhat.thermostat.common.dao.VmInfoDAO; import com.redhat.thermostat.common.storage.Connection; import com.redhat.thermostat.common.storage.Connection.ConnectionListener; import com.redhat.thermostat.common.storage.Connection.ConnectionStatus; import com.redhat.thermostat.common.storage.MongoStorageProvider; import com.redhat.thermostat.common.storage.Storage; import com.redhat.thermostat.common.storage.StorageProvider; import com.redhat.thermostat.common.tools.BasicCommand; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.common.utils.OSGIUtils; import sun.misc.Signal; import sun.misc.SignalHandler; @SuppressWarnings("restriction") public final class AgentApplication extends BasicCommand { private static final String NAME = "agent"; // TODO: Use LocaleResources for i18n-ized strings. private static final String USAGE = "thermostat agent -d <url> [-u <user> -p <password>] [-s] [--debug]"; private AgentStartupConfiguration configuration; private AgentOptionParser parser; private void parseArguments(Arguments args) throws InvalidConfigurationException { configuration = AgentConfigsUtils.createAgentConfigs(); parser = new AgentOptionParser(configuration, args); parser.parse(); } @Override public AgentStartupConfiguration getConfiguration() { return configuration; } private void runAgent(CommandContext ctx) { long startTime = System.currentTimeMillis(); configuration.setStartTime(startTime); if (configuration.isDebugConsole()) { LoggingUtils.useDevelConsole(); } final Logger logger = LoggingUtils.getLogger(AgentApplication.class); StorageProvider connProv = new MongoStorageProvider(configuration); final DAOFactory daoFactory = new MongoDAOFactory(connProv); ApplicationContext.getInstance().setDAOFactory(daoFactory); TimerFactory timerFactory = new ThreadPoolTimerFactory(1); ApplicationContext.getInstance().setTimerFactory(timerFactory); Connection connection = daoFactory.getConnection(); ConnectionListener connectionListener = new ConnectionListener() { @Override public void changed(ConnectionStatus newStatus) { switch (newStatus) { case DISCONNECTED: logger.warning("Unexpected disconnect event."); break; case CONNECTING: logger.fine("Connecting to storage."); break; case CONNECTED: logger.fine("Connected to storage, registering storage as service"); registerDAOsAndStorageAsOSGiServices(daoFactory); break; case FAILED_TO_CONNECT: logger.warning("Could not connect to storage."); System.exit(Constants.EXIT_UNABLE_TO_CONNECT_TO_DATABASE); default: logger.warning("Unfamiliar ConnectionStatus value"); } } }; connection.addListener(connectionListener); connection.connect(); logger.fine("Connecting to storage..."); final ConfigurationServer configServer = OSGIUtils.getInstance().getService(ConfigurationServer.class); configServer.startListening(configuration.getConfigListenAddress()); BackendRegistry backendRegistry = null; try { backendRegistry = new BackendRegistry(configuration); } catch (BackendLoadException ble) { logger.log(Level.SEVERE, "Could not get BackendRegistry instance.", ble); System.exit(Constants.EXIT_BACKEND_LOAD_ERROR); } final Agent agent = new Agent(backendRegistry, configuration, daoFactory); try { logger.fine("Starting agent."); agent.start(); } catch (LaunchException le) { logger.log(Level.SEVERE, "Agent could not start, probably because a configured backend could not be activated.", le); System.exit(Constants.EXIT_BACKEND_START_ERROR); } logger.fine("Agent started."); ctx.getConsole().getOutput().println("Agent id: " + agent.getId()); ctx.getConsole().getOutput().println("agent started."); logger.fine("Agent id: " + agent.getId()); final CountDownLatch shutdownLatch = new CountDownLatch(1); SignalHandler handler = new CustomSignalHandler(agent, configServer, logger, shutdownLatch); Signal.handle(new Signal("INT"), handler); Signal.handle(new Signal("TERM"), handler); try { // Wait for either SIGINT or SIGTERM shutdownLatch.await(); logger.fine("terminating agent cmd"); } catch (InterruptedException e) { return; } } private void registerDAOsAndStorageAsOSGiServices(DAOFactory daoFactory) { OSGIUtils registerer = OSGIUtils.getInstance(); registerer.registerService(Storage.class, daoFactory.getStorage()); /* * only register DAOs that don't maintain state; * the dao instances will be shared across multiple unrelated classes * and any state maintained will quickly lead to bugs */ registerer.registerService(AgentInfoDAO.class, daoFactory.getAgentInfoDAO()); registerer.registerService(BackendInfoDAO.class, daoFactory.getBackendInfoDAO()); registerer.registerService(HostInfoDAO.class, daoFactory.getHostInfoDAO()); registerer.registerService(NetworkInterfaceInfoDAO.class, daoFactory.getNetworkInterfaceInfoDAO()); registerer.registerService(VmInfoDAO.class, daoFactory.getVmInfoDAO()); } @Override public void run(CommandContext ctx) throws CommandException { try { parseArguments(ctx.getArguments()); if (!parser.isHelp()) { runAgent(ctx); } } catch (InvalidConfigurationException ex) { throw new CommandException(ex); } } @Override public String getName() { return NAME; } @Override public String getUsage() { return USAGE; } @Override public Options getOptions() { return AgentOptionParser.getOptions(); } // Does not need a reference of the enclosing type so lets declare this class static private static class CustomSignalHandler implements SignalHandler { private Agent agent; private ConfigurationServer configServer; private Logger logger; private CountDownLatch shutdownLatch; CustomSignalHandler(Agent agent, ConfigurationServer configServer, Logger logger, CountDownLatch latch) { this.agent = agent; this.configServer = configServer; this.logger = logger; this.shutdownLatch = latch; } @Override public void handle(Signal arg0) { configServer.stopListening(); agent.stop(); logger.fine("Agent stopped."); shutdownLatch.countDown(); } } }