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    • io.netty.example.discard.DiscardClientHandler Maven / Gradle / Ivy

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    This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

    There is a newer version: 35.0.0.Beta1
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    /*
 * 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.example.discard;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

/**
 * Handles a client-side channel.
 */
public class DiscardClientHandler extends SimpleChannelInboundHandler {

    private ByteBuf content;
    private ChannelHandlerContext ctx;

    @Override
    public void channelActive(ChannelHandlerContext ctx) {
        this.ctx = ctx;

        // Initialize the message.
        content = ctx.alloc().directBuffer(DiscardClient.SIZE).writeZero(DiscardClient.SIZE);

        // Send the initial messages.
        generateTraffic();
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) {
        content.release();
    }

    @Override
    public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
        // Server is supposed to send nothing, but if it sends something, discard it.
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        cause.printStackTrace();
        ctx.close();
    }

    long counter;

    private void generateTraffic() {
        // Flush the outbound buffer to the socket.
        // Once flushed, generate the same amount of traffic again.
        ctx.writeAndFlush(content.retainedDuplicate()).addListener(trafficGenerator);
    }

    private final ChannelFutureListener trafficGenerator = new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture future) {
            if (future.isSuccess()) {
                generateTraffic();
            } else {
                future.cause().printStackTrace();
                future.channel().close();
            }
        }
    };
}
    
    
    
    

    




    
    
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