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) 2011
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.sample.osgi.rs;
040
041import javax.annotation.Resource;
042import javax.ws.rs.GET;
043import javax.ws.rs.Path;
044
045import org.dcm4che3.net.DeviceService;
046import org.dcm4che3.sample.osgi.device.EchoDeviceService;
047import org.osgi.framework.Bundle;
048import org.osgi.framework.BundleContext;
049import org.osgi.framework.BundleException;
050import org.osgi.framework.BundleReference;
051import org.osgi.framework.ServiceReference;
052import org.slf4j.Logger;
053import org.slf4j.LoggerFactory;
054
055/**
056 * RESTful Service implementing a Dicom device.
057 * 
058 * @author Umberto Cappellini <umberto.cappellini@agfa.com>
059 * 
060 */
061@Path("")
062public class EchoDeviceServiceRS {
063
064    private static final Logger LOG = LoggerFactory.getLogger(DeviceService.class);
065        
066    @Resource
067    private BundleContext context;
068
069    @GET
070    @Path("running")
071    public String isRunning() {
072        return String.valueOf(service().isRunning());
073    }
074
075    @GET
076    @Path("start")
077    public void start() throws Exception {
078        service().start();
079    }
080
081    @GET
082    @Path("stop")
083    public void stop() {
084        service().stop();
085    }
086
087    @GET
088    @Path("reload")
089    public void reload() throws Exception {
090        service().reload();
091    }
092
093    private EchoDeviceService service() {
094        return lookup(EchoDeviceService.class);
095    }
096
097    private <T> T lookup(Class<T> clazz) {
098        if (context == null) {
099            LOG.warn("BundleContext not injected");
100            context = getBundleContextFromClass(clazz);
101        }
102        ServiceReference<T> sref = context.getServiceReference(clazz);
103        return context.getService(sref);
104    }
105
106    private <T> BundleContext getBundleContextFromClass(Class<T> clazz) {
107        BundleReference bref = (BundleReference) clazz.getClassLoader();
108        Bundle bundle = bref.getBundle();
109        if (bundle.getState() != Bundle.ACTIVE) {
110            try {
111                bundle.start();
112            } catch (BundleException ex) 
113            {
114                LOG.error("Cannot start bundle", ex);
115            }
116        }
117        return bundle.getBundleContext();
118    }
119
120}