org.apache.mina.core.service.IoHandler Maven / Gradle / Ivy
/**
* Copyright 2007-2015, Kaazing Corporation. 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.apache.mina.core.service;
import java.io.IOException;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;
/**
* Handles all I/O events fired by MINA.
*
* @author Apache MINA Project
*
* @see IoHandlerAdapter
*/
public interface IoHandler {
/**
* Invoked from an I/O processor thread when a new connection has been created.
* Because this method is supposed to be called from the same thread that
* handles I/O of multiple sessions, please implement this method to perform
* tasks that consumes minimal amount of time such as socket parameter
* and user-defined session attribute initialization.
*/
void sessionCreated(IoSession session) throws Exception;
/**
* Invoked when a connection has been opened. This method is invoked after
* {@link #sessionCreated(IoSession)}. The biggest difference from
* {@link #sessionCreated(IoSession)} is that it's invoked from other thread
* than an I/O processor thread once thread model is configured properly.
*/
void sessionOpened(IoSession session) throws Exception;
/**
* Invoked when a connection is closed.
*/
void sessionClosed(IoSession session) throws Exception;
/**
* Invoked with the related {@link IdleStatus} when a connection becomes idle.
* This method is not invoked if the transport type is UDP; it's a known bug,
* and will be fixed in 2.0.
*/
void sessionIdle(IoSession session, IdleStatus status) throws Exception;
/**
* Invoked when any exception is thrown by user {@link IoHandler}
* implementation or by MINA. If cause
is an instance of
* {@link IOException}, MINA will close the connection automatically.
*/
void exceptionCaught(IoSession session, Throwable cause) throws Exception;
/**
* Invoked when a message is received.
*/
void messageReceived(IoSession session, Object message) throws Exception;
/**
* Invoked when a message written by {@link IoSession#write(Object)} is
* sent out.
*/
void messageSent(IoSession session, Object message) throws Exception;
}