001    /**
002     * Copyright (C) 2012 FuseSource, Inc.
003     * http://fusesource.com
004     *
005     * Licensed under the Apache License, Version 2.0 (the "License");
006     * you may not use this file except in compliance with the License.
007     * 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     */
017    
018    package org.fusesource.hawtdispatch.transport;
019    
020    import java.io.IOException;
021    
022    
023    /**
024     * An asynchronous listener of commands
025     *
026     */
027    public interface TransportListener {
028        
029        /**
030         * called to process a command
031         * @param command
032         */
033        void onTransportCommand(Object command);
034    
035        /**
036         * transport can now accept more commands for transmission. 
037         */
038        void onRefill();
039    
040        /**
041         * An unrecoverable exception has occured on the transport
042         * @param error
043         */
044        void onTransportFailure(IOException error);
045        
046        /**
047         * The transport has been connected.
048         */
049        public void onTransportConnected();
050    
051        /**
052         * The transport has been disconnected.
053         */
054        public void onTransportDisconnected();
055    
056    }