org.osgi/src/main/java/org/osgi/framework/AllServiceListener.java

/*
 * $Header: /cvshome/build/org.osgi.framework/src/org/osgi/framework/AllServiceListener.java,v 1.8 2006/03/14 01:21:02 hargrave Exp $
 * 
 * Copyright (c) OSGi Alliance (2005). 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;

/**
 * A <code>ServiceEvent</code> listener.
 * 
 * <p>
 * <code>AllServiceListener</code> is a listener interface that may be
 * implemented by a bundle developer.
 * <p>
 * An <code>AllServiceListener</code> object is registered with the Framework
 * using the <code>BundleContext.addServiceListener</code> method.
 * <code>AllServiceListener</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>AllServiceListener</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 the service was
 * registered under.
 * 
 * <p>
 * Unlike normal <code>ServiceListener</code> objects,
 * <code>AllServiceListener</code> objects receive all ServiceEvent objects
 * regardless of the whether the package source of the listening bundle is equal
 * to the package source of the bundle that registered the service. This means
 * that the listener may not be able to cast the service object to any of its
 * corresponding service interfaces if the service object is retrieved.
 * 
 * @version $Revision: 1.8 $
 * @see ServiceEvent
 * @see ServicePermission
 * @since 1.3
 */

public interface AllServiceListener extends ServiceListener {
	// This is a marker interface
}