com.alibaba.rocketmq.shade.io.netty.channel.ChannelOutboundHandler Maven / Gradle / Ivy
/*
* Copyright 2012 The Netty Project
*
* The Netty Project licenses this file to you 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 io.netty.channel;
import java.net.SocketAddress;
/**
* {@link ChannelHandler} which will get notified for IO-outbound-operations.
*/
public interface ChannelOutboundHandler extends ChannelHandler {
/**
* Called once a bind operation is made.
*
* @param ctx the {@link ChannelHandlerContext} for which the bind operation is made
* @param localAddress the {@link SocketAddress} to which it should bound
* @param promise the {@link ChannelPromise} to notify once the operation completes
* @throws Exception thrown if an error accour
*/
void bind(ChannelHandlerContext ctx, SocketAddress localAddress, ChannelPromise promise) throws Exception;
/**
* Called once a connect operation is made.
*
* @param ctx the {@link ChannelHandlerContext} for which the connect operation is made
* @param remoteAddress the {@link SocketAddress} to which it should connect
* @param localAddress the {@link SocketAddress} which is used as source on connect
* @param promise the {@link ChannelPromise} to notify once the operation completes
* @throws Exception thrown if an error accour
*/
void connect(
ChannelHandlerContext ctx, SocketAddress remoteAddress,
SocketAddress localAddress, ChannelPromise promise) throws Exception;
/**
* Called once a disconnect operation is made.
*
* @param ctx the {@link ChannelHandlerContext} for which the disconnect operation is made
* @param promise the {@link ChannelPromise} to notify once the operation completes
* @throws Exception thrown if an error accour
*/
void disconnect(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception;
/**
* Called once a close operation is made.
*
* @param ctx the {@link ChannelHandlerContext} for which the close operation is made
* @param promise the {@link ChannelPromise} to notify once the operation completes
* @throws Exception thrown if an error accour
*/
void close(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception;
/**
* Called once a deregister operation is made from the current registered {@link EventLoop}.
*
* @param ctx the {@link ChannelHandlerContext} for which the close operation is made
* @param promise the {@link ChannelPromise} to notify once the operation completes
* @throws Exception thrown if an error accour
*/
void deregister(ChannelHandlerContext ctx, ChannelPromise promise) throws Exception;
/**
* Intercepts {@link ChannelHandlerContext#read()}.
*/
void read(ChannelHandlerContext ctx) throws Exception;
/**
* Called once a write operation is made. The write operation will write the messages through the
* {@link ChannelPipeline}. Those are then ready to be flushed to the actual {@link Channel} once
* {@link Channel#flush()} is called
*
* @param ctx the {@link ChannelHandlerContext} for which the write operation is made
* @param msg the message to write
* @param promise the {@link ChannelPromise} to notify once the operation completes
* @throws Exception thrown if an error accour
*/
void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception;
/**
* Called once a flush operation is made. The flush operation will try to flush out all previous written messages
* that are pending.
*
* @param ctx the {@link ChannelHandlerContext} for which the flush operation is made
* @throws Exception thrown if an error accour
*/
void flush(ChannelHandlerContext ctx) throws Exception;
}