| /* |
| * Copyright (c) OSGi Alliance (2000, 2010). All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.osgi.framework; |
| |
| import java.util.EventListener; |
| |
| /** |
| * A {@code ServiceEvent} listener. {@code ServiceListener} is a |
| * listener interface that may be implemented by a bundle developer. When a |
| * {@code ServiceEvent} is fired, it is synchronously delivered to a |
| * {@code ServiceListener}. The Framework may deliver |
| * {@code ServiceEvent} objects to a {@code ServiceListener} out |
| * of order and may concurrently call and/or reenter a |
| * {@code ServiceListener}. |
| * |
| * <p> |
| * A {@code ServiceListener} object is registered with the Framework |
| * using the {@code BundleContext.addServiceListener} method. |
| * {@code ServiceListener} objects are called with a |
| * {@code ServiceEvent} object when a service is registered, modified, or |
| * is in the process of unregistering. |
| * |
| * <p> |
| * {@code ServiceEvent} object delivery to {@code ServiceListener} |
| * objects is filtered by the filter specified when the listener was registered. |
| * If the Java Runtime Environment supports permissions, then additional |
| * filtering is done. {@code ServiceEvent} objects are only delivered to |
| * the listener if the bundle which defines the listener object's class has the |
| * appropriate {@code ServicePermission} to get the service using at |
| * least one of the named classes under which the service was registered. |
| * |
| * <p> |
| * {@code ServiceEvent} object delivery to {@code ServiceListener} |
| * objects is further filtered according to package sources as defined in |
| * {@link ServiceReference#isAssignableTo(Bundle, String)}. |
| * |
| * @see ServiceEvent |
| * @see ServicePermission |
| * @ThreadSafe |
| * @version $Id: d73f8e9b4babc8b53b5d1cbe7b17b732f54bb2a3 $ |
| */ |
| |
| public interface ServiceListener extends EventListener { |
| /** |
| * Receives notification that a service has had a lifecycle change. |
| * |
| * @param event The {@code ServiceEvent} object. |
| */ |
| public void serviceChanged(ServiceEvent event); |
| } |