001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel;
018
019/**
020 * {@link org.apache.camel.Endpoint} can optionally implement this interface to
021 * indicate whether or not it supports multiple consumers.
022 * <p/>
023 * By default endpoints are assumed <b>not</b> to support multiple consumers.
024 * <p/>
025 * A rare few endpoints do in fact support multiple consumers and thus the purpose of this interface.
026 * For example JMS endpoints which have topics that can be consumed by multiple consumers.
027 * <p/>
028 * The purpose of this is to check on startup that we do not have multiple consumers
029 * for the <b>same</b> endpoints. This prevents starting up with copy/paste mistakes in the Camel routes.
030 *
031 * @version 
032 */
033public interface MultipleConsumersSupport {
034
035    /**
036     * Are multiple consumers supported?
037     *
038     * @return <tt>true</tt> if multiple consumers are supported
039     */
040    boolean isMultipleConsumersSupported();
041}