| /* |
| * Copyright (c) OSGi Alliance (2000, 2015). 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; |
| import org.osgi.annotation.versioning.ConsumerType; |
| |
| /** |
| * 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 |
| * @author $Id: e061a4c69c017c04dafe285926424bd1a2132b51 $ |
| */ |
| @ConsumerType |
| @FunctionalInterface |
| 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); |
| } |