| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.apache.sling.mom; |
| |
| import org.osgi.annotation.versioning.ProviderType; |
| |
| import java.util.Map; |
| |
| /** |
| * |
| * To implement a topic subscriber implement this interface, register it as an OSGi service and the TopicManager |
| * which will implement a OSGi Whiteboard pattern will register it based on the values in the OSGi property "topics". |
| * The component may optionally implement MessageFilter if it wants to separate filtering messages sooner. |
| */ |
| @ProviderType |
| public interface Subscriber { |
| |
| /** |
| * This is a String[] OSGi property containing the topic names this subscriber should subscribe to. |
| */ |
| String TOPIC_NAMES_PROP = "topics"; |
| |
| /** |
| * Will be called with each message matching the filters the TopicListener is registered with. |
| * |
| * @param topic |
| * @param message |
| */ |
| void onMessage(Types.TopicName topic, Map<String, Object> message); |
| |
| |
| } |