2 * Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.sal.binding.api;
10 import java.util.concurrent.ExecutorService;
11 import java.util.concurrent.Executors;
13 import org.osgi.framework.BundleActivator;
14 import org.osgi.framework.BundleContext;
15 import org.osgi.framework.ServiceReference;
16 import org.osgi.util.tracker.ServiceTracker;
17 import org.osgi.util.tracker.ServiceTrackerCustomizer;
19 public abstract class AbstractBrokerAwareActivator implements BundleActivator {
21 private static final ExecutorService mdActivationPool = Executors.newCachedThreadPool();
22 private BundleContext context;
23 private ServiceTracker<BindingAwareBroker, BindingAwareBroker> tracker;
24 private BindingAwareBroker broker;
25 private ServiceTrackerCustomizer<BindingAwareBroker, BindingAwareBroker> customizer = new ServiceTrackerCustomizer<BindingAwareBroker, BindingAwareBroker>() {
28 public BindingAwareBroker addingService(ServiceReference<BindingAwareBroker> reference) {
29 broker = context.getService(reference);
30 mdActivationPool.execute(() -> onBrokerAvailable(broker, context));
35 public void modifiedService(ServiceReference<BindingAwareBroker> reference, BindingAwareBroker service) {
36 removedService(reference, service);
37 addingService(reference);
41 public void removedService(ServiceReference<BindingAwareBroker> reference, BindingAwareBroker service) {
42 broker = context.getService(reference);
43 mdActivationPool.execute(() -> onBrokerRemoved(broker, context));
50 public final void start(BundleContext context) throws Exception {
51 this.context = context;
53 tracker = new ServiceTracker<>(context, BindingAwareBroker.class, customizer);
61 public final void stop(BundleContext context) throws Exception {
68 * Called when this bundle is started (before
69 * {@link BindingAwareProvider#onSessionInitiated(ProviderContext)} so the Framework can perform
70 * the bundle-specific activities necessary to start this bundle. This
71 * method can be used to register services or to allocate any resources that
75 * This method must complete and return to its caller in a timely manner.
78 * The execution context of the bundle being started.
79 * @throws RuntimeException
80 * If this method throws an exception, this bundle is marked as
81 * stopped and the Framework will remove this bundle's
82 * listeners, unregister all services registered by this bundle,
83 * and release all services used by this bundle.
85 protected void startImpl(BundleContext context) {
90 * Called when this bundle is stopped so the Framework can perform the
91 * bundle-specific activities necessary to stop the bundle. In general, this
92 * method should undo the work that the {@code BundleActivator.start} method
93 * started. There should be no active threads that were started by this
94 * bundle when this bundle returns. A stopped bundle must not call any
98 * This method must complete and return to its caller in a timely manner.
100 * @param context The execution context of the bundle being stopped.
101 * @throws RuntimeException If this method throws an exception, the bundle is still
102 * marked as stopped, and the Framework will remove the bundle's
103 * listeners, unregister all services registered by the bundle, and
104 * release all services used by the bundle.
106 protected void stopImpl(BundleContext context) {
111 protected abstract void onBrokerAvailable(BindingAwareBroker broker, BundleContext context);
113 protected void onBrokerRemoved(BindingAwareBroker broker, BundleContext context) {