com.notifier.desktop.service.impl.ServiceClientImpl.java Source code

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Here is the source code for com.notifier.desktop.service.impl.ServiceClientImpl.java

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/*
 * Android Notifier Desktop is a multiplatform remote notification client for Android devices.
 *
 * Copyright (C) 2010  Leandro Aparecido
 *
 * This program 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 version 3 of the License.
 *
 * 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.notifier.desktop.service.impl;

import java.io.*;
import java.net.*;

import org.slf4j.*;

import com.google.common.io.*;
import com.notifier.desktop.service.*;

public class ServiceClientImpl implements ServiceClient {

    private static final int SOCKET_TIMEOUT = 3 * 1000;

    private static final Logger logger = LoggerFactory.getLogger(ServiceClientImpl.class);

    @Override
    public boolean isRunning() {
        return sendCommand(ServiceServer.Command.PING);
    }

    @Override
    public boolean stop() {
        return sendCommand(ServiceServer.Command.STOP);
    }

    protected boolean sendCommand(ServiceServer.Command command) {
        Socket socket = null;
        try {
            socket = getSocket();
            final Socket socketToUse = socket;
            CharStreams.write(command.name(), new OutputSupplier<BufferedWriter>() {
                @Override
                public BufferedWriter getOutput() throws IOException {
                    return new BufferedWriter(
                            new OutputStreamWriter(socketToUse.getOutputStream(), ServiceServerImpl.CHARSET));
                }
            });
            return true;
        } catch (ConnectException e) {
            return false;
        } catch (IOException e) {
            logger.warn("Error sending command to service server", e);
            return false;
        } finally {
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    logger.warn("Error closing socket to service server", e);
                }
            }
        }
    }

    protected Socket getSocket() throws IOException {
        Socket socket = new Socket(InetAddress.getByName(null), ServiceServerImpl.PORT);
        socket.setSoTimeout(SOCKET_TIMEOUT);
        return socket;
    }
}