uk.co.gidley.jmxmonitor.RegistryManager.java Source code

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Here is the source code for uk.co.gidley.jmxmonitor.RegistryManager.java

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/*
 * Copyright 2009 Ben Gidley
 *
 *    Licensed 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 uk.co.gidley.jmxmonitor;

import org.apache.commons.configuration.CompositeConfiguration;
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.tapestry5.ioc.IOCUtilities;
import org.apache.tapestry5.ioc.Registry;
import org.apache.tapestry5.ioc.RegistryBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import uk.co.gidley.jmxmonitor.services.InitialisationException;
import uk.co.gidley.jmxmonitor.services.JmxMonitorModule;
import uk.co.gidley.jmxmonitor.services.MainConfiguration;
import uk.co.gidley.jmxmonitor.services.ThreadManager;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * Start the registry and pass control to the manager service.
 * <p/>
 * This is seperate from the command line version to facilitate testing
 */
public class RegistryManager {
    private static final Logger logger = LoggerFactory.getLogger(RegistryManager.class);

    private String configurationFile;

    public boolean isReadyToRun() {
        return readyToRun;
    }

    private boolean readyToRun = false;

    public Registry getRegistry() {
        return registry;
    }

    private Registry registry;

    public RegistryManager(String configurationFile) {
        this.configurationFile = configurationFile;
    }

    public void start() throws InitialisationException {
        RegistryBuilder registryBuilder = new RegistryBuilder();
        IOCUtilities.addDefaultModules(registryBuilder);
        registryBuilder.add(JmxMonitorModule.class);
        registry = registryBuilder.build();
        parseMainConfiguration(configurationFile, registry);
        registry.performRegistryStartup();
        ThreadManager threadManager = registry.getService(ThreadManager.class);
        try {
            readyToRun = true;
            threadManager.initialise();
        } finally {
            registry.shutdown();
        }
    }

    public void stop() throws InitialisationException, IOException {
        Configuration config = readConfiguration(configurationFile);
        String stopKey = config.getString(ThreadManager.JMXMONITOR_STOPKEY);
        int stopPort = config.getInt(ThreadManager.JMXMONITOR_STOPPORT);

        Socket socket = new Socket("localhost", stopPort);
        PrintWriter printWriter = new PrintWriter(socket.getOutputStream(), true);
        printWriter.write(stopKey);
        printWriter.flush();

    }

    private static void parseMainConfiguration(String configurationFile, Registry registry)
            throws InitialisationException {
        MainConfiguration mainConfiguration = registry.getService(MainConfiguration.class);
        CompositeConfiguration config = readConfiguration(configurationFile);
        mainConfiguration.setConfiguration(config);
    }

    private static CompositeConfiguration readConfiguration(String configurationFile)
            throws InitialisationException {
        // Read configuration file
        CompositeConfiguration config = new CompositeConfiguration();
        config.setThrowExceptionOnMissing(true);
        try {
            config.addConfiguration(new PropertiesConfiguration(configurationFile));
        } catch (ConfigurationException e) {
            logger.error("{}", e);
            throw new InitialisationException(e);
        }
        return config;
    }
}