| /* |
| * $Header: /cvshome/build/org.osgi.framework/src/org/osgi/framework/ServiceListener.java,v 1.15 2007/02/20 00:16:30 hargrave Exp $ |
| * |
| * Copyright (c) OSGi Alliance (2000, 2007). 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</code> listener. <code>ServiceListener</code> is a |
| * listener interface that may be implemented by a bundle developer. When a |
| * <code>ServiceEvent</code> is fired, it is synchronously delivered to a |
| * <code>ServiceListener</code>. The Framework may deliver |
| * <code>ServiceEvent</code> objects to a <code>ServiceListener</code> out |
| * of order and may concurrently call and/or reenter a |
| * <code>ServiceListener</code>. |
| * |
| * <p> |
| * A <code>ServiceListener</code> object is registered with the Framework |
| * using the <code>BundleContext.addServiceListener</code> method. |
| * <code>ServiceListener</code> objects are called with a |
| * <code>ServiceEvent</code> object when a service is registered, modified, or |
| * is in the process of unregistering. |
| * |
| * <p> |
| * <code>ServiceEvent</code> object delivery to <code>ServiceListener</code> |
| * 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</code> objects are only delivered to |
| * the listener if the bundle which defines the listener object's class has the |
| * appropriate <code>ServicePermission</code> to get the service using at |
| * least one of the named classes under which the service was registered. |
| * |
| * <p> |
| * <code>ServiceEvent</code> object delivery to <code>ServiceListener</code> |
| * objects is further filtered according to package sources as defined in |
| * {@link ServiceReference#isAssignableTo(Bundle, String)}. |
| * |
| * @see ServiceEvent |
| * @see ServicePermission |
| * @ThreadSafe |
| * @version $Revision: 1.15 $ |
| */ |
| |
| public interface ServiceListener extends EventListener { |
| /** |
| * Receives notification that a service has had a lifecycle change. |
| * |
| * @param event The <code>ServiceEvent</code> object. |
| */ |
| public void serviceChanged(ServiceEvent event); |
| } |