+/*
+ * Copyright (c) 2013 Cisco Systems, 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
+ */
package org.opendaylight.controller.sal.core.api;
import java.util.Collection;
import java.util.Collections;
-import org.opendaylight.controller.sal.core.api.Broker.ProviderSession;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;
+import org.osgi.util.tracker.ServiceTracker;
+import org.osgi.util.tracker.ServiceTrackerCustomizer;
-public abstract class AbstractProvider implements BundleActivator, Provider {
+public abstract class AbstractProvider implements BundleActivator, Provider,ServiceTrackerCustomizer<Broker, Broker> {
- private ServiceReference<Broker> brokerRef;
private Broker broker;
-
+ private BundleContext context;
+ private ServiceTracker<Broker, Broker> tracker;
@Override
public Collection<ProviderFunctionality> getProviderFunctionality() {
return Collections.emptySet();
@Override
public final void start(BundleContext context) throws Exception {
- brokerRef = context.getServiceReference(Broker.class);
- broker = context.getService(brokerRef);
-
+ this.context = context;
this.startImpl(context);
-
- broker.registerProvider(this,context);
+ tracker = new ServiceTracker<>(context, Broker.class, this);
+ tracker.open();
}
- public abstract void startImpl(BundleContext context);
+ protected void startImpl(BundleContext context) {
+ // NOOP
+ }
+ protected void stopImpl(BundleContext context) {
+ // NOOP
+ }
@Override
public final void stop(BundleContext context) throws Exception {
- // TODO Auto-generated method stub
+ broker = null;
+ tracker.close();
+ tracker = null;
+ stopImpl(context);
+ }
+
+ @Override
+ public Broker addingService(ServiceReference<Broker> reference) {
+ if(broker == null) {
+ broker = context.getService(reference);
+ broker.registerProvider(this, context);
+ return broker;
+ }
+
+ return null;
+ }
+ @Override
+ public void modifiedService(ServiceReference<Broker> reference, Broker service) {
+ // NOOP
+ }
+
+ @Override
+ public void removedService(ServiceReference<Broker> reference, Broker service) {
+ stopImpl(context);
}
}