| /**************************************************************************** |
| * Copyright (c) 2004 Composent, Inc. and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Composent, Inc. - initial API and implementation |
| *****************************************************************************/ |
| package org.eclipse.ecf.internal.provider.jmdns; |
| |
| import java.util.Dictionary; |
| import java.util.Properties; |
| import org.eclipse.core.runtime.IAdapterManager; |
| import org.eclipse.ecf.core.ContainerConnectException; |
| import org.eclipse.ecf.core.IContainer; |
| import org.eclipse.ecf.core.identity.IDCreateException; |
| import org.eclipse.ecf.core.util.*; |
| import org.eclipse.ecf.discovery.IDiscoveryAdvertiser; |
| import org.eclipse.ecf.discovery.IDiscoveryLocator; |
| import org.eclipse.ecf.discovery.service.IDiscoveryService; |
| import org.eclipse.ecf.provider.jmdns.container.JMDNSDiscoveryContainer; |
| import org.osgi.framework.*; |
| import org.osgi.service.log.LogService; |
| import org.osgi.util.tracker.ServiceTracker; |
| |
| /** |
| * The main plugin class to be used in the desktop. |
| */ |
| @SuppressWarnings("unchecked") |
| public class JMDNSPlugin implements BundleActivator { |
| public static final String NAME = "ecf.discovery.jmdns"; //$NON-NLS-1$ |
| |
| // The shared instance. |
| private static JMDNSPlugin plugin; |
| |
| private BundleContext context = null; |
| |
| public static final String PLUGIN_ID = "org.eclipse.ecf.provider.jmdns"; //$NON-NLS-1$ |
| |
| /** |
| * The constructor. |
| */ |
| public JMDNSPlugin() { |
| super(); |
| plugin = this; |
| } |
| |
| private ServiceTracker adapterManagerTracker = null; |
| |
| private ServiceRegistration serviceRegistration; |
| |
| private ServiceTracker logServiceTracker = null; |
| |
| private LogService logService = null; |
| |
| public IAdapterManager getAdapterManager() { |
| // First, try to get the adapter manager via |
| if (adapterManagerTracker == null) { |
| adapterManagerTracker = new ServiceTracker(this.context, IAdapterManager.class.getName(), null); |
| adapterManagerTracker.open(); |
| } |
| IAdapterManager adapterManager = (IAdapterManager) adapterManagerTracker.getService(); |
| // Then, if the service isn't there, try to get from Platform class via |
| // PlatformHelper class |
| if (adapterManager == null) |
| adapterManager = PlatformHelper.getPlatformAdapterManager(); |
| return adapterManager; |
| } |
| |
| /** |
| * This method is called upon plug-in activation |
| */ |
| public void start(final BundleContext ctxt) throws Exception { |
| this.context = ctxt; |
| |
| final Properties props = new Properties(); |
| props.put(IDiscoveryService.CONTAINER_NAME, NAME); |
| props.put(Constants.SERVICE_RANKING, new Integer(750)); |
| String[] clazzes = new String[] {IDiscoveryService.class.getName(), IDiscoveryLocator.class.getName(), IDiscoveryAdvertiser.class.getName()}; |
| serviceRegistration = context.registerService(clazzes, serviceFactory, (Dictionary) props); |
| } |
| |
| private final DiscoveryServiceFactory serviceFactory = new DiscoveryServiceFactory(); |
| |
| class DiscoveryServiceFactory implements ServiceFactory { |
| private volatile JMDNSDiscoveryContainer jdc; |
| |
| /* (non-Javadoc) |
| * @see org.osgi.framework.ServiceFactory#getService(org.osgi.framework.Bundle, org.osgi.framework.ServiceRegistration) |
| */ |
| public Object getService(final Bundle bundle, final ServiceRegistration registration) { |
| if (jdc == null) { |
| try { |
| jdc = new JMDNSDiscoveryContainer(); |
| jdc.connect(null, null); |
| } catch (final IDCreateException e) { |
| Trace.catching(JMDNSPlugin.PLUGIN_ID, JMDNSDebugOptions.EXCEPTIONS_CATCHING, this.getClass(), "getService(Bundle, ServiceRegistration)", e); //$NON-NLS-1$ //$NON-NLS-2$ |
| } catch (final ContainerConnectException e) { |
| Trace.catching(JMDNSPlugin.PLUGIN_ID, JMDNSDebugOptions.EXCEPTIONS_CATCHING, this.getClass(), "getService(Bundle, ServiceRegistration)", e); //$NON-NLS-1$ //$NON-NLS-2$ |
| jdc = null; |
| } |
| } |
| return jdc; |
| } |
| |
| /** |
| * @return false if this factory has never created a service instance, true otherwise |
| */ |
| public boolean isActive() { |
| return jdc != null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.osgi.framework.ServiceFactory#ungetService(org.osgi.framework.Bundle, org.osgi.framework.ServiceRegistration, java.lang.Object) |
| */ |
| public void ungetService(final Bundle bundle, final ServiceRegistration registration, final Object service) { |
| //TODO-mkuppe we later might want to dispose jmDNS when the last!!! consumer ungets the service |
| //Though don't forget about the (ECF) Container which might still be in use |
| } |
| } |
| |
| protected Bundle getBundle() { |
| if (context == null) { |
| return null; |
| } |
| return context.getBundle(); |
| } |
| |
| /** |
| * This method is called when the plug-in is stopped |
| */ |
| public void stop(final BundleContext ctxt) throws Exception { |
| if (serviceRegistration != null && serviceFactory.isActive()) { |
| ServiceReference reference = serviceRegistration.getReference(); |
| IDiscoveryLocator aLocator = (IDiscoveryLocator) ctxt.getService(reference); |
| |
| serviceRegistration.unregister(); |
| |
| IContainer container = (IContainer) aLocator.getAdapter(IContainer.class); |
| container.disconnect(); |
| container.dispose(); |
| |
| serviceRegistration = null; |
| } |
| if (adapterManagerTracker != null) { |
| adapterManagerTracker.close(); |
| adapterManagerTracker = null; |
| } |
| if (logServiceTracker != null) { |
| logServiceTracker.close(); |
| logServiceTracker = null; |
| logService = null; |
| } |
| this.context = ctxt; |
| plugin = null; |
| } |
| |
| /** |
| * Returns the shared instance. |
| */ |
| public synchronized static JMDNSPlugin getDefault() { |
| return plugin; |
| } |
| |
| /** |
| * @param string |
| * @param t |
| */ |
| public void logException(final String string, final Throwable t) { |
| getLogService(); |
| if (logService != null) { |
| logService.log(LogService.LOG_ERROR, string, t); |
| } |
| } |
| |
| /** |
| * @param string |
| * @param t |
| */ |
| public void logInfo(final String string, final Throwable t) { |
| getLogService(); |
| if (logService != null) { |
| logService.log(LogService.LOG_INFO, string, t); |
| } |
| } |
| |
| protected LogService getLogService() { |
| if (logServiceTracker == null) { |
| logServiceTracker = new ServiceTracker(this.context, LogService.class.getName(), null); |
| logServiceTracker.open(); |
| } |
| logService = (LogService) logServiceTracker.getService(); |
| if (logService == null) { |
| logService = new SystemLogService(PLUGIN_ID); |
| } |
| return logService; |
| } |
| |
| /** |
| * @param errorString |
| */ |
| public void logError(final String errorString) { |
| getLogService(); |
| if (logService != null) { |
| logService.log(LogService.LOG_ERROR, errorString); |
| } |
| } |
| |
| } |