Mercurial > hg > release > thermostat-0.9
view agent/cli/src/main/java/com/redhat/thermostat/agent/cli/impl/AgentApplication.java @ 1101:97e66ed2e4ae
Add localize() variant and remove cause-only CommandException constructor
reviewed-by: omajid
review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-May/006596.html
author | Jon VanAlten <jon.vanalten@redhat.com> |
---|---|
date | Mon, 13 May 2013 16:26:16 -0600 |
parents | 8b19c4771db1 |
children |
line wrap: on
line source
/* * 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.Map; 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 org.osgi.util.tracker.ServiceTracker; 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.ExitStatus; import com.redhat.thermostat.common.LaunchException; import com.redhat.thermostat.common.MultipleServiceTracker; import com.redhat.thermostat.common.MultipleServiceTracker.Action; import com.redhat.thermostat.common.cli.AbstractStateNotifyingCommand; 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.utils.LoggingUtils; import com.redhat.thermostat.storage.core.Connection.ConnectionListener; import com.redhat.thermostat.storage.core.Connection.ConnectionStatus; import com.redhat.thermostat.storage.core.ConnectionException; import com.redhat.thermostat.storage.core.DbService; import com.redhat.thermostat.storage.core.DbServiceFactory; import com.redhat.thermostat.storage.core.Storage; import com.redhat.thermostat.storage.dao.AgentInfoDAO; import com.redhat.thermostat.storage.dao.BackendInfoDAO; @SuppressWarnings("restriction") public final class AgentApplication extends AbstractStateNotifyingCommand { private static final Logger logger = LoggingUtils.getLogger(AgentApplication.class); private final BundleContext bundleContext; private final ConfigurationCreator configurationCreator; private AgentStartupConfiguration configuration; private AgentOptionParser parser; private DbServiceFactory dbServiceFactory; @SuppressWarnings("rawtypes") private ServiceTracker configServerTracker; private MultipleServiceTracker daoTracker; private final ExitStatus exitStatus; private CountDownLatch shutdownLatch; public AgentApplication(BundleContext bundleContext, ExitStatus exitStatus) { this(bundleContext, exitStatus, new ConfigurationCreator(), new DbServiceFactory()); } AgentApplication(BundleContext bundleContext, ExitStatus exitStatus, ConfigurationCreator configurationCreator, DbServiceFactory dbServiceFactory) { this.bundleContext = bundleContext; this.configurationCreator = configurationCreator; this.dbServiceFactory = dbServiceFactory; this.exitStatus = exitStatus; } private void parseArguments(Arguments args) throws InvalidConfigurationException { parser = new AgentOptionParser(configuration, args); parser.parse(); } @SuppressWarnings({ "rawtypes", "unchecked" }) private void runAgent(CommandContext ctx) { long startTime = System.currentTimeMillis(); configuration.setStartTime(startTime); final DbService dbService = dbServiceFactory.createDbService( configuration.getUsername(), configuration.getPassword(), configuration.getDBConnectionString()); shutdownLatch = new CountDownLatch(1); configServerTracker = new ServiceTracker(bundleContext, ConfigurationServer.class.getName(), null) { @Override public Object addingService(ServiceReference reference) { final ConfigurationServer configServer = (ConfigurationServer) super.addingService(reference); String [] host = configuration.getConfigListenAddress().split(":"); configServer.startListening(host[0], Integer.valueOf(host[1])); 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"); handleConnected(configServer); break; case FAILED_TO_CONNECT: // ConnectionException will be thrown break; default: logger.warning("Unfamiliar ConnectionStatus value: " + newStatus.toString()); } } }; dbService.addConnectionListener(connectionListener); logger.fine("Connecting to storage..."); try { dbService.connect(); } catch (ConnectionException e) { logger.log(Level.SEVERE, "Could not connect to storage.", e); shutdown(); } return configServer; } @Override public void removedService(ServiceReference reference, Object service) { if (shutdownLatch.getCount() > 0) { // Lost config server while still running logger.warning("ConfigurationServer unexpectedly became unavailable"); } super.removedService(reference, service); } }; configServerTracker.open(); 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 { configuration = configurationCreator.create(); parseArguments(ctx.getArguments()); if (!parser.isHelp()) { runAgent(ctx); } } public void shutdown() { // Exit application if (shutdownLatch != null) { shutdownLatch.countDown(); } if (daoTracker != null) { daoTracker.close(); } if (configServerTracker != null) { configServerTracker.close(); } } private class CustomSignalHandler implements SignalHandler { private Agent agent; private ConfigurationServer configServer; public CustomSignalHandler(Agent agent, ConfigurationServer configServer) { this.agent = agent; this.configServer = configServer; } @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."); shutdown(); } } Agent startAgent(final Storage storage, AgentInfoDAO agentInfoDAO, BackendInfoDAO backendInfoDAO) { BackendRegistry backendRegistry = null; try { backendRegistry = new BackendRegistry(bundleContext); } catch (Exception e) { logger.log(Level.SEVERE, "Could not get BackendRegistry instance.", e); exitStatus.setExitStatus(ExitStatus.EXIT_ERROR); shutdown(); // Since this would throw NPE's down the line if we continue in this // method, let's fail right and early :) throw new RuntimeException(e); } final Agent agent = new Agent(backendRegistry, configuration, storage, agentInfoDAO, backendInfoDAO); 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); exitStatus.setExitStatus(ExitStatus.EXIT_ERROR); shutdown(); } logger.fine("Agent started."); logger.info("Agent id: " + agent.getId()); logger.info("agent started."); return agent; } private void handleConnected(final ConfigurationServer configServer) { Class<?>[] deps = new Class<?>[] { Storage.class, AgentInfoDAO.class, BackendInfoDAO.class }; daoTracker = new MultipleServiceTracker(bundleContext, deps, new Action() { @Override public void dependenciesAvailable(Map<String, Object> services) { Storage storage = (Storage) services.get(Storage.class.getName()); AgentInfoDAO agentInfoDAO = (AgentInfoDAO) services .get(AgentInfoDAO.class.getName()); BackendInfoDAO backendInfoDAO = (BackendInfoDAO) services .get(BackendInfoDAO.class.getName()); Agent agent = startAgent(storage, agentInfoDAO, backendInfoDAO); SignalHandler handler = new CustomSignalHandler(agent, configServer); Signal.handle(new Signal("INT"), handler); Signal.handle(new Signal("TERM"), handler); } @Override public void dependenciesUnavailable() { if (shutdownLatch.getCount() > 0) { // In the rare case we lose one of our deps, gracefully shutdown logger.severe("Storage unexpectedly became unavailable"); shutdown(); } } }); daoTracker.open(); } static class ConfigurationCreator { public AgentStartupConfiguration create() throws InvalidConfigurationException { return AgentConfigsUtils.createAgentConfigs(); } } @Override public boolean isAvailableInShell() { return false; } @Override public boolean isStorageRequired() { return false; } }