Java 在Netty 4中向上游迁移_Java_Netty

Java 在Netty 4中向上游迁移

java netty

Java 在Netty 4中向上游迁移,java,netty,Java,Netty,我正在从netty 3迁移到netty 4。我有一个管道处理程序，它充当一个典型的过滤器，在途中拦截/处理不符合要求的消息，并将符合要求的消息推到上游基于文档（），我希望使用ctx.fireInboundBufferUpdated（）代替ctx.sendUpStream（）来中继入站。但是，我发现这不起作用，但是ChannelHandlerUtil.addTonBuundBuffer（）起作用。我希望得到以下方面的指导：我对当前文档断言ctx.sendUpstream->ctx.firein

我正在从netty 3迁移到netty 4。我有一个管道处理程序，它充当一个典型的过滤器，在途中拦截/处理不符合要求的消息，并将符合要求的消息推到上游

基于文档（），我希望使用

ctx.fireInboundBufferUpdated（）

代替

ctx.sendUpStream（）

来中继入站。但是，我发现这不起作用，但是

ChannelHandlerUtil.addTonBuundBuffer（）

起作用。我希望得到以下方面的指导：

我对当前文档断言

ctx.sendUpstream->ctx.fireinboundBufferUpdate

和

在这种情况下，如果与我下面所做的不同，那么最佳实践是什么

守则：

//The pipeline

public class ServerInitializer extends ChannelInitializer<SocketChannel> {

 @Override
 public void initChannel(SocketChannel ch) throws Exception {
     ChannelPipeline p = ch.pipeline();
     p.addLast("decoder", new HttpRequestDecoder());
     p.addLast("encoder", new HttpResponseEncoder());
     p.addLast("inbound", InboundHttpRequestFilter.INSTANCE);
     p.addLast("handler", handlerClass.newInstance());

 }
}

//The filter
public class InboundHttpRequestFilter extends
        ChannelInboundMessageHandlerAdapter<Object> {

    @Override
    public void messageReceived(ChannelHandlerContext ctx, Object msg)
            throws Exception {
        ... discard/handle as necessary …;
        //ctx.fireInboundBufferUpdated(); - doesn't propagate upstream
        ChannelHandlerUtil.addToNextInboundBuffer(ctx, msg); // sends upstream
    }
}

//管道
公共类ServerInitializer扩展了ChannelInitializer{
@凌驾
public void initChannel（SocketChannel ch）引发异常{
ChannelPipeline p=通道管道（）；
p、 addLast（“解码器”，新的HttpRequestDecoder（））；
p、 addLast（“编码器”，新的HttpResponseEncoder（））；
p、 addLast（“入站”，InboundHttpRequestFilter.INSTANCE）；
p、 addLast（“handler”，handlerClass.newInstance（））；
}
}
//过滤器
公共类InboundHttpRequestFilter扩展
ChannelInboundMessageHandlerAdapter{
@凌驾
接收到公共无效消息（ChannelHandlerContext ctx，对象消息）
抛出异常{
…必要时丢弃/处理…；
//ctx.fireInboundBufferUpdated（）；-不向上游传播
ChannelHandlerUtil.AddTonBuffer（ctx，msg）；//向上游发送
}
}

试试这个：

ctx.nextInboundMessageBuffer().add(msg)

Javadoc：

Interface ChannelHandlerContext
MessageBuf<Object>  nextInboundMessageBuffer()
    Return the MessageBuf of the next ChannelInboundMessageHandler in the pipeline.

接口ChannelHandlerContext
MessageBuf nextInboundMessageBuffer（）
返回管道中下一个ChannelInboundMessageHandler的MessageBuf。

Netty 4多处理器示例：

MultiHandlerServer.java

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.nio.charset.Charset;

public class MultiHandlerServer {
    private static final Logger logger = LoggerFactory.getLogger(MultiHandlerServer.class);

    final int port;

    public MultiHandlerServer(final int port) {
        this.port = port;
    }

    public void run() throws InterruptedException {
        final NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        final NioEventLoopGroup workerGroup = new NioEventLoopGroup();
        try {

            final ServerBootstrap serverBootstrap = new ServerBootstrap()
                    .group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(
                                    new LineBasedFrameDecoder(8192),
                                    new StringDecoder(Charset.forName("UTF-8")),
                                    new MultiHandler01(), new MultiHandler02());
                        }
                    });

            final ChannelFuture future = serverBootstrap.bind(port).sync();
            future.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        final MultiHandlerServer client = new MultiHandlerServer(8080);
        client.run();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler01 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler01.class);

    MultiHandler01() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler01 receive message: %s", msg));
        ctx.nextInboundMessageBuffer().add(msg);
        ctx.fireInboundBufferUpdated();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler02 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler02.class);

    MultiHandler02() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler02 receive message: %s", msg));
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

导入io.netty.bootstrap.ServerBootstrap；
导入io.netty.channel.ChannelFuture；
导入io.netty.channel.ChannelInitializer；
导入io.netty.channel.nio.NioEventLoopGroup；
导入io.netty.channel.socket.SocketChannel；
导入io.netty.channel.socket.nio.NioServerSocketChannel；
导入io.netty.handler.codec.LineBasedFrameDecoder；
导入io.netty.handler.codec.string.StringDecoder；
导入org.slf4j.Logger；
导入org.slf4j.LoggerFactory；
导入java.nio.charset.charset；
公共类多处理器服务器{
私有静态最终记录器Logger=LoggerFactory.getLogger（MultiHandlerServer.class）；
最终国际端口；
公共多处理器服务器（最终int端口）{
this.port=端口；
}
public void run（）引发InterruptedException{
final NioEventLoopGroup bossGroup=新的NioEventLoopGroup（）；
final NioEventLoopGroup workerGroup=新的NioEventLoopGroup（）；
试一试{
final ServerBootstrap ServerBootstrap=newserverbootstrap（）
.group（bossGroup、workerGroup）
.channel（NioServerSocketChannel.class）
.childHandler（新的通道初始值设定项（）{
@凌驾
受保护的void initChannel（SocketChannel ch）引发异常{
ch.pipeline（）.addLast(
新的LineBasedFrameDecoder（8192），
新的字符串解码器（字符集forName（“UTF-8”），
新的MultiHandler01（），新的MultiHandler02（））；
}
});
final ChannelFuture=serverBootstrap.bind（port.sync（）；
future.channel（）.closeFuture（）.sync（）；
}最后{
bossGroup.shutdownGracefully（）；
workerGroup.shutdownGracefully（）；
}
}
公共静态void main（字符串[]args）引发InterruptedException{
最终MultiHandlerServer客户端=新的MultiHandlerServer（8080）；
client.run（）；
}
}

MultiHandler01.java

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.nio.charset.Charset;

public class MultiHandlerServer {
    private static final Logger logger = LoggerFactory.getLogger(MultiHandlerServer.class);

    final int port;

    public MultiHandlerServer(final int port) {
        this.port = port;
    }

    public void run() throws InterruptedException {
        final NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        final NioEventLoopGroup workerGroup = new NioEventLoopGroup();
        try {

            final ServerBootstrap serverBootstrap = new ServerBootstrap()
                    .group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(
                                    new LineBasedFrameDecoder(8192),
                                    new StringDecoder(Charset.forName("UTF-8")),
                                    new MultiHandler01(), new MultiHandler02());
                        }
                    });

            final ChannelFuture future = serverBootstrap.bind(port).sync();
            future.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        final MultiHandlerServer client = new MultiHandlerServer(8080);
        client.run();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler01 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler01.class);

    MultiHandler01() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler01 receive message: %s", msg));
        ctx.nextInboundMessageBuffer().add(msg);
        ctx.fireInboundBufferUpdated();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler02 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler02.class);

    MultiHandler02() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler02 receive message: %s", msg));
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

导入io.netty.channel.ChannelHandlerContext；
导入io.netty.channel.ChannelInboundMessageHandlerAdapter；
导入org.slf4j.Logger；
导入org.slf4j.LoggerFactory；
/**
*/
类MultiHandler01扩展ChannelInboundMessageHandlerAdapter{
私有记录器Logger=LoggerFactory.getLogger（MultiHandler01.class）；
MultiHandler01（）{
}
@凌驾
public void messageReceived（ChannelHandlerContext ctx，String msg）引发异常{
logger.info（String.format（“Handler01接收消息：%s”，msg））；
ctx.nextInboundMessageBuffer（）.add（msg）；
ctx.fireInboundBufferUpdated（）；
}
@凌驾
public void exceptionCaught（ChannelHandlerContext ctx，可丢弃原因）引发异常{
logger.error（“捕获的异常：%s”，ctx.channel（）.remoteAddress（），原因）；
ctx.close（）；
}
}

MultiHandler02.java

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.nio.charset.Charset;

public class MultiHandlerServer {
    private static final Logger logger = LoggerFactory.getLogger(MultiHandlerServer.class);

    final int port;

    public MultiHandlerServer(final int port) {
        this.port = port;
    }

    public void run() throws InterruptedException {
        final NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        final NioEventLoopGroup workerGroup = new NioEventLoopGroup();
        try {

            final ServerBootstrap serverBootstrap = new ServerBootstrap()
                    .group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(
                                    new LineBasedFrameDecoder(8192),
                                    new StringDecoder(Charset.forName("UTF-8")),
                                    new MultiHandler01(), new MultiHandler02());
                        }
                    });

            final ChannelFuture future = serverBootstrap.bind(port).sync();
            future.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        final MultiHandlerServer client = new MultiHandlerServer(8080);
        client.run();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler01 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler01.class);

    MultiHandler01() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler01 receive message: %s", msg));
        ctx.nextInboundMessageBuffer().add(msg);
        ctx.fireInboundBufferUpdated();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler02 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler02.class);

    MultiHandler02() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler02 receive message: %s", msg));
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

导入io.netty.channel.ChannelHandlerContext；
导入io.netty.channel.ChannelInboundMessageHandlerAdapter；
导入org.slf4j.Logger；
导入org.slf4j.LoggerFactory；
/**
*/
类MultiHandler02扩展ChannelInboundMessageHandlerAdapter{
私有记录器Logger=LoggerFactory.getLogger（MultiHandler02.class）；
MultiHandler02（）{
}
@凌驾
public void messageReceived（ChannelHandlerContext ctx，String msg）引发异常{
logger.info（String.format（“Handler02接收消息：%s”，msg））；
}
@凌驾
public void exceptionCaught（ChannelHandlerContext ctx，可丢弃原因）引发异常{
logger.error（“捕获的异常：%s”，ctx.channel（）.remoteAddress（），原因）；
ctx.close（）；
}
}

试试这个：

ctx.nextInboundMessageBuffer().add(msg)

Javadoc：

Interface ChannelHandlerContext
MessageBuf<Object>  nextInboundMessageBuffer()
    Return the MessageBuf of the next ChannelInboundMessageHandler in the pipeline.

接口ChannelHandlerContext
MessageBuf nextInboundMessageBuffer（）
返回管道中下一个ChannelInboundMessageHandler的MessageBuf。

Netty 4多处理器示例：

MultiHandlerServer.java

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.nio.charset.Charset;

public class MultiHandlerServer {
    private static final Logger logger = LoggerFactory.getLogger(MultiHandlerServer.class);

    final int port;

    public MultiHandlerServer(final int port) {
        this.port = port;
    }

    public void run() throws InterruptedException {
        final NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        final NioEventLoopGroup workerGroup = new NioEventLoopGroup();
        try {

            final ServerBootstrap serverBootstrap = new ServerBootstrap()
                    .group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(
                                    new LineBasedFrameDecoder(8192),
                                    new StringDecoder(Charset.forName("UTF-8")),
                                    new MultiHandler01(), new MultiHandler02());
                        }
                    });

            final ChannelFuture future = serverBootstrap.bind(port).sync();
            future.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) throws InterruptedException {
        final MultiHandlerServer client = new MultiHandlerServer(8080);
        client.run();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler01 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler01.class);

    MultiHandler01() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler01 receive message: %s", msg));
        ctx.nextInboundMessageBuffer().add(msg);
        ctx.fireInboundBufferUpdated();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundMessageHandlerAdapter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 */
class MultiHandler02 extends ChannelInboundMessageHandlerAdapter<String> {
    private Logger logger = LoggerFactory.getLogger(MultiHandler02.class);

    MultiHandler02() {
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
        logger.info(String.format("Handler02 receive message: %s", msg));
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        logger.error("Exception caught: %s", ctx.channel().remoteAddress(), cause);
        ctx.close();
    }
}

impo