Mercurial > hg > release > thermostat-0.5
view agent/cli/src/main/java/com/redhat/thermostat/agent/cli/impl/AgentApplication.java @ 929:ccac9bcabaa0
Update copyright year of source code
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/005295.html
reviewed-by: vanaltj
author | Mario Torre <neugens.limasoftware@gmail.com> |
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date | Wed, 23 Jan 2013 16:49:27 +0100 |
parents | 40be72a1345c |
children | 186115da601f |
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/* * Copyright 2012, 2013 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.impl; import java.util.concurrent.CountDownLatch; import java.util.logging.Level; import java.util.logging.Logger; import org.osgi.framework.BundleContext; import org.osgi.framework.ServiceReference; import sun.misc.Signal; import sun.misc.SignalHandler; 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.BackendRegistry; import com.redhat.thermostat.backend.BackendService; import com.redhat.thermostat.common.Constants; import com.redhat.thermostat.common.LaunchException; 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.DAOFactory; import com.redhat.thermostat.common.dao.DAOFactoryImpl; import com.redhat.thermostat.common.tools.BasicCommand; import com.redhat.thermostat.common.utils.LoggingUtils; import com.redhat.thermostat.storage.core.Connection; import com.redhat.thermostat.storage.core.StorageProvider; import com.redhat.thermostat.storage.core.StorageProviderUtil; import com.redhat.thermostat.storage.core.Connection.ConnectionListener; import com.redhat.thermostat.storage.core.Connection.ConnectionStatus; @SuppressWarnings("restriction") public final class AgentApplication extends BasicCommand { private static final String NAME = "agent"; private final BundleContext bundleContext; private final ConfigurationCreator configurationCreator; private final DAOFactoryCreator daoFactoryCreator; private AgentStartupConfiguration configuration; private AgentOptionParser parser; public AgentApplication(BundleContext bundleContext) { this(bundleContext, new ConfigurationCreator(), new DAOFactoryCreator()); } AgentApplication(BundleContext bundleContext, ConfigurationCreator configurationCreator, DAOFactoryCreator daoFactoryCreator) { this.bundleContext = bundleContext; this.configurationCreator = configurationCreator; this.daoFactoryCreator = daoFactoryCreator; } private void parseArguments(Arguments args) throws InvalidConfigurationException { 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); final DAOFactory daoFactory = daoFactoryCreator.create(configuration); 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"); daoFactory.registerDAOsAndStorageAsOSGiServices(); 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..."); @SuppressWarnings("rawtypes") ServiceReference configServiceRef = bundleContext.getServiceReference(ConfigurationServer.class.getName()); @SuppressWarnings("unchecked") final ConfigurationServer configServer = (ConfigurationServer) bundleContext.getService(configServiceRef); configServer.startListening(configuration.getConfigListenAddress()); BackendRegistry backendRegistry = null; try { backendRegistry = new BackendRegistry(bundleContext); } catch (Exception e) { logger.log(Level.SEVERE, "Could not get BackendRegistry instance.", e); System.exit(Constants.EXIT_BACKEND_LOAD_ERROR); } final Agent agent = new Agent(backendRegistry, configuration, daoFactory); try { logger.fine("Starting agent."); agent.start(); bundleContext.registerService(BackendService.class, new BackendService(), null); } 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; } } @Override public void run(CommandContext ctx) throws CommandException { try { configuration = configurationCreator.create(); parseArguments(ctx.getArguments()); if (!parser.isHelp()) { runAgent(ctx); } } catch (InvalidConfigurationException ex) { throw new CommandException(ex); } } @Override public String getName() { return NAME; } // 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(); try { agent.stop(); } catch (Exception ex) { // We don't want any exception to hold back the signal handler, otherwise // there will be no way to actually stop Thermostat. ex.printStackTrace(); } logger.fine("Agent stopped."); shutdownLatch.countDown(); } } static class ConfigurationCreator { public AgentStartupConfiguration create() throws InvalidConfigurationException { return AgentConfigsUtils.createAgentConfigs(); } } static class DAOFactoryCreator { public DAOFactory create(AgentStartupConfiguration config) { StorageProvider connProv = StorageProviderUtil.getStorageProvider(config); final DAOFactory daoFactory = new DAOFactoryImpl(connProv); return daoFactory; } } }