| package org.apache.archiva.event; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.Set; |
| |
| /** |
| * Allows implementer to emit to, subscribe and unsubscribe EventObservers |
| */ |
| public interface EventBus |
| { |
| /** |
| * Emit a event |
| * @param emitter |
| * @param message |
| */ |
| void emit(EventEmitter emitter, EventMessage message); |
| |
| /** |
| * Allows the subscriber to receive messages from this event bus |
| * @param observer |
| */ |
| void subscribe(EventObserver observer); |
| |
| /** |
| * Stops the observer from receiving any messages |
| * @param observer |
| */ |
| void unsubscribe(EventObserver observer); |
| |
| /** |
| * Get the set of registered EventObservers |
| * @return |
| */ |
| Set<EventObserver> getObservers(); |
| } |