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/*******************************************************************************
* Copyright (c) 2009 Markus Alexander Kuppe.
* 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:
* Markus Alexander Kuppe (ecf-dev_eclipse.org <at> lemmster <dot> de) - initial API and implementation
******************************************************************************/
package org.eclipse.ecf.provider.dnssd;
import java.util.Dictionary;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import org.eclipse.ecf.core.ContainerConnectException;
import org.eclipse.ecf.core.IContainer;
import org.eclipse.ecf.discovery.IDiscoveryAdvertiser;
import org.eclipse.ecf.discovery.IDiscoveryLocator;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.framework.ServiceFactory;
import org.osgi.framework.ServiceReference;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.cm.ConfigurationException;
import org.osgi.service.cm.ManagedServiceFactory;
public class Activator implements BundleActivator {
public static final String PLUGIN_ID = "org.eclipse.ecf.provider.dnssd"; //$NON-NLS-1$
public static final String DISCOVERY_CONTAINER_NAME_VALUE = "ecf.discovery.dnssd"; //$NON-NLS-1$
public static final String LOCATOR = ".locator"; //$NON-NLS-1$
public static final String ADVERTISER = ".advertiser"; //$NON-NLS-1$
private static final String DISCOVERY_CONTAINER_NAME_KEY = "org.eclipse.ecf.discovery.containerName"; //$NON-NLS-1$
private final Map serviceRegistrations = new HashMap();
private volatile BundleContext context;
/*
* (non-Javadoc)
* @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
*/
public void start(BundleContext context) throws Exception {
this.context = context;
// register a managed factory for the locator service
final Properties locCmProps = new Properties();
locCmProps.put(Constants.SERVICE_PID, DISCOVERY_CONTAINER_NAME_VALUE + LOCATOR);
context.registerService(ManagedServiceFactory.class.getName(), new DnsSdManagedServiceFactory(DnsSdDiscoveryLocator.class), locCmProps);
// register the locator service
final Properties locProps = new Properties();
locProps.put(DISCOVERY_CONTAINER_NAME_KEY, DISCOVERY_CONTAINER_NAME_VALUE + LOCATOR);
locProps.put(Constants.SERVICE_RANKING, new Integer(750));
serviceRegistrations.put(null, context.registerService(IDiscoveryLocator.class.getName(), new DnsSdServiceFactory(DnsSdDiscoveryLocator.class), locProps));
// register a managed factory for the advertiser service
final Properties advCmProps = new Properties();
advCmProps.put(Constants.SERVICE_PID, DISCOVERY_CONTAINER_NAME_VALUE + ADVERTISER);
context.registerService(ManagedServiceFactory.class.getName(), new DnsSdManagedServiceFactory(DnsSdDiscoveryAdvertiser.class), advCmProps);
// register the advertiser service
final Properties advProps = new Properties();
advProps.put(DISCOVERY_CONTAINER_NAME_KEY, DISCOVERY_CONTAINER_NAME_VALUE + ADVERTISER);
advProps.put(Constants.SERVICE_RANKING, new Integer(750));
serviceRegistrations.put(null, context.registerService(IDiscoveryAdvertiser.class.getName(), new DnsSdServiceFactory(DnsSdDiscoveryAdvertiser.class), advProps));
}
/*
* (non-Javadoc)
* @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
*/
public void stop(BundleContext context) throws Exception {
if (serviceRegistrations != null) {
for (final Iterator itr = serviceRegistrations.values().iterator(); itr.hasNext();) {
final ServiceRegistration serviceRegistration = (ServiceRegistration) itr.next();
disposeServiceRegistration(serviceRegistration);
}
}
this.context = null;
}
/**
* @param serviceRegistration disconnects the underlying IContainer and unregisters the service
*/
private void disposeServiceRegistration(ServiceRegistration serviceRegistration) {
final ServiceReference reference = serviceRegistration.getReference();
final IContainer aContainer = (DnsSdDiscoveryContainerAdapter) context.getService(reference);
serviceRegistration.unregister();
final IContainer container = (IContainer) aContainer.getAdapter(IContainer.class);
container.dispose();
container.disconnect();
}
/**
* A ManagedServiceFactory capable to handle DnsSdDiscoveryContainerAdapters
*/
private class DnsSdManagedServiceFactory implements ManagedServiceFactory {
private final Class containerClass;
public DnsSdManagedServiceFactory(Class aContainerClass) {
containerClass = aContainerClass;
}
/* (non-Javadoc)
* @see org.osgi.service.cm.ManagedServiceFactory#getName()
*/
public String getName() {
return this.getClass().getName();
}
/* (non-Javadoc)
* @see org.osgi.service.cm.ManagedServiceFactory#updated(java.lang.String, java.util.Dictionary)
*/
public void updated(String pid, Dictionary properties)
throws ConfigurationException {
if(properties != null) {
DnsSdDiscoveryContainerAdapter adapter = null;
DnsSdServiceTypeID targetID = null;
try {
// get existing or create new discoverycontainer
final ServiceRegistration serviceRegistration = (ServiceRegistration) serviceRegistrations.get(pid);
if(serviceRegistration != null) {
adapter = (DnsSdDiscoveryContainerAdapter) context.getService(serviceRegistration.getReference());
targetID = (DnsSdServiceTypeID) adapter.getConnectedID();
} else {
adapter = (DnsSdDiscoveryContainerAdapter) containerClass.newInstance();
targetID = new DnsSdServiceTypeID();
}
// apply configuration
final String[] searchPaths = (String[]) properties.get(IDnsSdDiscoveryConstants.CA_SEARCH_PATH);
if(searchPaths != null) {
targetID.setSearchPath(searchPaths);
}
final String resolver = (String) properties.get(IDnsSdDiscoveryConstants.CA_RESOLVER);
if(resolver != null) {
adapter.setResolver(resolver);
}
final String tsigKey = (String) properties.get(IDnsSdDiscoveryConstants.CA_TSIG_KEY);
if(tsigKey != null) {
final String tsigKeyName = (String) properties.get(IDnsSdDiscoveryConstants.CA_TSIG_KEY_NAME);
adapter.setTsigKey(tsigKeyName, tsigKey);
}
// finally connect container and keep ser reg for later updates/deletes
if(serviceRegistration == null) {
final Properties props = new Properties();
props.put(Constants.SERVICE_PID, pid);
adapter.connect(targetID, null);
serviceRegistrations.put(pid, context.registerService(IDiscoveryLocator.class.getName(), adapter, props));
}
} catch (ContainerConnectException e) {
throw new ConfigurationException("IDnsSdDiscoveryConstants properties", e.getLocalizedMessage(), e); //$NON-NLS-1$
} catch (ClassCastException cce) {
throw new ConfigurationException("IDnsSdDiscoveryConstants properties", cce.getLocalizedMessage(), cce); //$NON-NLS-1$
} catch (InstantiationException e) {
// may never happen
throw new ConfigurationException("InstantiationException", e.getLocalizedMessage(), e); //$NON-NLS-1$
} catch (IllegalAccessException e) {
// may never happen
throw new ConfigurationException("IllegalAccessException", e.getLocalizedMessage(), e); //$NON-NLS-1$
}
}
}
/* (non-Javadoc)
* @see org.osgi.service.cm.ManagedServiceFactory#deleted(java.lang.String)
*/
public void deleted(String pid) {
final ServiceRegistration serviceRegistration = (ServiceRegistration) serviceRegistrations.get(pid);
disposeServiceRegistration(serviceRegistration);
}
}
/**
* A ServiceFactory capable to handle DnsSdDiscoveryContainerAdapters
*/
public class DnsSdServiceFactory implements ServiceFactory {
private volatile DnsSdDiscoveryContainerAdapter container;
private final Class containerClass;
public DnsSdServiceFactory(Class aDiscoveryContainerClass) {
containerClass = aDiscoveryContainerClass;
}
/* (non-Javadoc)
* @see org.osgi.framework.ServiceFactory#getService(org.osgi.framework.Bundle, org.osgi.framework.ServiceRegistration)
*/
public Object getService(Bundle bundle, ServiceRegistration registration) {
if (container == null) {
try {
container = (DnsSdDiscoveryContainerAdapter) containerClass.newInstance();
container.connect(null, null);
} catch (final ContainerConnectException e) {
// may never happen
e.printStackTrace();
container = null;
} catch (InstantiationException e) {
// may never happen
e.printStackTrace();
container = null;
} catch (IllegalAccessException e) {
// may never happen
e.printStackTrace();
container = null;
}
}
return container;
}
/* (non-Javadoc)
* @see org.osgi.framework.ServiceFactory#ungetService(org.osgi.framework.Bundle, org.osgi.framework.ServiceRegistration, java.lang.Object)
*/
public void ungetService(Bundle bundle,
ServiceRegistration registration, Object service) {
// nop
}
}
}
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