Source Code Cross Referenced for SingleSessionIoHandler.java in  » Net » mina-2.0.0-M1 » org » apache » mina » handler » multiton » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » mina 2.0.0 M1 » org.apache.mina.handler.multiton 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


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.mina.handler.multiton;
021:
022:        import java.io.IOException;
023:
024:        import org.apache.mina.common.IdleStatus;
025:        import org.apache.mina.common.IoHandler;
026:        import org.apache.mina.common.IoSession;
027:
028:        /**
029:         * A session handler without an {@link IoSession} parameter for simplicity.
030:         * <p>
031:         * A {@link SingleSessionIoHandler} is similar to an {@link IoHandler} with
032:         * the notable difference that a {@link SingleSessionIoHandler} is used only
033:         * by one session at a time. Thus, there is no {@link IoSession} parameter in
034:         * the methods of this interface.
035:         * </p>
036:         * <p>
037:         * Because events are passed to the session in order, it is possible to store
038:         * conversational state as instance variables in this object.
039:         * </p>
040:         *
041:         * @author The Apache MINA Project (dev@mina.apache.org)
042:         * @version $Rev: 576217 $, $Date: 2007-09-16 17:55:27 -0600 (Sun, 16 Sep 2007) $
043:         */
044:        public interface SingleSessionIoHandler {
045:
046:            /**
047:             * Invoked when the session is created. Initialize default socket parameters
048:             * and user-defined attributes here.
049:             *
050:             * @throws Exception
051:             * @see IoHandler#sessionCreated(IoSession)
052:             */
053:            void sessionCreated() throws Exception;
054:
055:            /**
056:             * Invoked when the connection is opened. This method is not invoked if the
057:             * transport type is UDP.
058:             *
059:             * @see IoHandler#sessionOpened(IoSession)
060:             */
061:            void sessionOpened() throws Exception;
062:
063:            /**
064:             * Invoked when the connection is closed. This method is not invoked if the
065:             * transport type is UDP.
066:             *
067:             * @see IoHandler#sessionClosed(IoSession)
068:             */
069:            void sessionClosed() throws Exception;
070:
071:            /**
072:             * Invoked when the connection is idle. Refer to {@link IdleStatus}. This
073:             * method is not invoked if the transport type is UDP.
074:             *
075:             * @param status the type of idleness
076:             * @see IoHandler#sessionIdle(IoSession, IdleStatus)
077:             */
078:            void sessionIdle(IdleStatus status) throws Exception;
079:
080:            /**
081:             * Invoked when any exception is thrown by user {@link IoHandler}
082:             * implementation or by MINA. If <code>cause</code> is instanceof
083:             * {@link IOException}, MINA will close the connection automatically.
084:             *
085:             * @param cause the caught exception
086:             * @see IoHandler#exceptionCaught(IoSession, Throwable)
087:             */
088:            void exceptionCaught(Throwable cause) throws Exception;
089:
090:            /**
091:             * Invoked when protocol message is received. Implement your protocol flow
092:             * here.
093:             *
094:             * @param message the received message
095:             * @see IoHandler#messageReceived(IoSession, Object)
096:             */
097:            void messageReceived(Object message) throws Exception;
098:
099:            /**
100:             * Invoked when protocol message that user requested by
101:             * {@link IoSession#write(Object)} is sent out actually.
102:             *
103:             * @param message the sent message
104:             * @see IoHandler#messageSent(IoSession, Object)
105:             */
106:            void messageSent(Object message) throws Exception;
107:
108:        }
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