org.codeartisans.java.sos.messagebus.Veto Maven / Gradle / Ivy
/*
* Copyright (c) 2009, Paul Merlin. 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.codeartisans.java.sos.messagebus;
/**
* @author Paul Merlin
*/
public interface Veto
{
/**
* Determine whether a Message should be vetoed or published.
*
* All MessageBus implementations call this method before Message delivery. If any of the Veto
* return true, then none of the Subscribers for that MessageType are called.
*
* @param Subscriber mark type, for type safety
* @param message Message
* @return True if the Message has to be vetoed, false otherwise.
*/
boolean veto( Message message );
}