001/* ***** BEGIN LICENSE BLOCK *****
002 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
003 *
004 * The contents of this file are subject to the Mozilla Public License Version
005 * 1.1 (the "License"); you may not use this file except in compliance with
006 * the License. You may obtain a copy of the License at
007 * http://www.mozilla.org/MPL/
008 *
009 * Software distributed under the License is distributed on an "AS IS" basis,
010 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
011 * for the specific language governing rights and limitations under the
012 * License.
013 *
014 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
015 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
016 *
017 * The Initial Developer of the Original Code is
018 * Agfa Healthcare.
019 * Portions created by the Initial Developer are Copyright (C) 2012
020 * the Initial Developer. All Rights Reserved.
021 *
022 * Contributor(s):
023 * See @authors listed below
024 *
025 * Alternatively, the contents of this file may be used under the terms of
026 * either the GNU General Public License Version 2 or later (the "GPL"), or
027 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
028 * in which case the provisions of the GPL or the LGPL are applicable instead
029 * of those above. If you wish to allow use of your version of this file only
030 * under the terms of either the GPL or the LGPL, and not to allow others to
031 * use your version of this file under the terms of the MPL, indicate your
032 * decision by deleting the provisions above and replace them with the notice
033 * and other provisions required by the GPL or the LGPL. If you do not delete
034 * the provisions above, a recipient may use your version of this file under
035 * the terms of any one of the MPL, the GPL or the LGPL.
036 *
037 * ***** END LICENSE BLOCK ***** */
038
039package org.dcm4che3.net;
040
041import java.util.concurrent.ExecutorService;
042import java.util.concurrent.Executors;
043import java.util.concurrent.ScheduledExecutorService;
044
045/**
046 * @author Gunter Zeilinger <gunterze@gmail.com>
047 *
048 */
049public class DeviceService implements DeviceServiceInterface
050{
051
052    protected Device device;
053    protected ExecutorService executor;
054    protected ScheduledExecutorService scheduledExecutor;
055
056    protected void init(Device device) {
057        setDevice(device);
058    }
059
060    public void setDevice(Device device) {
061        this.device = device;
062    }
063
064    public Device getDevice() {
065        return device;
066    }
067
068    public boolean isRunning() {
069        return executor != null;
070    }
071
072    public void start() throws Exception {
073        if (device == null)
074            throw new IllegalStateException("Not initialized");
075        if (executor != null)
076            throw new IllegalStateException("Already started");
077        executor = executerService();
078        scheduledExecutor = scheduledExecuterService();
079        try {
080            device.setExecutor(executor);
081            device.setScheduledExecutor(scheduledExecutor);
082            device.bindConnections();
083        } catch (Exception e) {
084            stop();
085            throw e;
086        }
087    }
088
089    public void stop() {
090        if (device != null)
091            device.unbindConnections();
092        if (scheduledExecutor != null)
093            scheduledExecutor.shutdown();
094        if (executor != null)
095            executor.shutdown();
096        executor = null;
097        scheduledExecutor = null;
098    }
099
100    protected ExecutorService executerService() {
101        return Executors.newCachedThreadPool();
102    }
103
104    protected ScheduledExecutorService scheduledExecuterService() {
105        return Executors.newSingleThreadScheduledExecutor();
106    }
107
108}