| /* |
| * Copyright (c) OSGi Alliance (2011, 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 org.osgi.annotation.versioning.ConsumerType; |
| import org.osgi.framework.hooks.service.ListenerHook; |
| |
| /** |
| * A {@code ServiceEvent} listener that does <i>not</i> filter based upon any |
| * filter string specified to |
| * {@link BundleContext#addServiceListener(ServiceListener, String)}. Using an |
| * {@code UnfilteredServiceListener} and specifying a filter string to |
| * {@link BundleContext#addServiceListener(ServiceListener, String)} allows the |
| * listener to receive all {@code ServiceEvent} objects while still advising |
| * {@link ListenerHook} implementation of the service interests in the filter |
| * string. |
| * |
| * For example, an implementation of Declarative Services would add an |
| * {@code UnfilteredServiceListener} with a filter string listing all the |
| * services referenced by all the service components. The Declarative Services |
| * implementation would receive all {@code ServiceEvent} objects for internal |
| * processing and a Remote Services discovery service implementation can observe |
| * the service interests of the service components using a {@link ListenerHook}. |
| * When the set of service components being processed changes, the Declarative |
| * Services implementation would re-add the {@code UnfilteredServiceListener} |
| * with an updated filter string. |
| * |
| * <p> |
| * When a {@code ServiceEvent} is fired, it is synchronously delivered to an |
| * {@code UnfilteredServiceListener}. The Framework may deliver |
| * {@code ServiceEvent} objects to an {@code UnfilteredServiceListener} out of |
| * order and may concurrently call and/or reenter an |
| * {@code UnfilteredServiceListener}. |
| * |
| * <p> |
| * An {@code UnfilteredServiceListener} object is registered with the Framework |
| * using the {@code BundleContext.addServiceListener} method. |
| * {@code UnfilteredServiceListener} 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 UnfilteredServiceListener} |
| * objects are <i>not</i> filtered by the filter specified when the listener was |
| * registered. If the Java Runtime Environment supports permissions, then some |
| * 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. |
| * |
| * @see ServiceEvent |
| * @see ServicePermission |
| * @ThreadSafe |
| * @since 1.7 |
| * @author $Id: ed5080773ff2a67f5f2ebf98628b7f14be115f73 $ |
| */ |
| @ConsumerType |
| @FunctionalInterface |
| public interface UnfilteredServiceListener extends ServiceListener { |
| // This is a marker interface |
| } |