001    /****************************************************************
002     * Licensed to the Apache Software Foundation (ASF) under one   *
003     * or more contributor license agreements.  See the NOTICE file *
004     * distributed with this work for additional information        *
005     * regarding copyright ownership.  The ASF licenses this file   *
006     * to you under the Apache License, Version 2.0 (the            *
007     * "License"); you may not use this file except in compliance   *
008     * with the License.  You may obtain a copy of the License at   *
009     *                                                              *
010     *   http://www.apache.org/licenses/LICENSE-2.0                 *
011     *                                                              *
012     * Unless required by applicable law or agreed to in writing,   *
013     * software distributed under the License is distributed on an  *
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015     * KIND, either express or implied.  See the License for the    *
016     * specific language governing permissions and limitations      *
017     * under the License.                                           *
018     ****************************************************************/
019    
020    package org.apache.james.jspf.executor;
021    
022    import java.util.List;
023    
024    
025    /**
026     * Queue implementation which is used to manage IResponse
027     *
028     */
029    public interface IResponseQueue extends List<IResponse> {
030        
031        /**
032         * Return the last IResponse in the queue. If the queue is empty it will
033         * wait until a IResponse was added
034         * 
035         * @return response
036         */
037        public IResponse removeResponse();
038        
039        /**
040         *  Add the given Response to the end of the queue. 
041         *  
042         * @param r
043         */
044        public void insertResponse(IResponse r);
045    
046    }