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- 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();
- }
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