Netty 100万级高并发服务器配置

package com.test.server;
import static org.jboss.netty.channel.Channels.pipeline;
import java.net.InetSocketAddress;
import java.util.concurrent.Executors;
import org.jboss.netty.bootstrap.ServerBootstrap;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ChannelPipelineFactory;
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
import org.jboss.netty.handler.codec.http.HttpChunkAggregator;
import org.jboss.netty.handler.codec.http.HttpRequestDecoder;
import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
import org.jboss.netty.handler.stream.ChunkedWriteHandler;
public class HttpChunkedServer {
private final int port;
public HttpChunkedServer(intport) {
this.port = port;
}
public void run() {
// Configure the server.
ServerBootstrap bootstrap = new ServerBootstrap(
new NioServerSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool()));
// Set up the event pipeline factory.
bootstrap.setPipelineFactory(newChannelPipelineFactory() {
public ChannelPipeline getPipeline ()throws Exception {
ChannelPipeline pipeline = pipeline();
pipeline.addLast("decoder", new HttpRequestDecoder());
pipeline.addLast("aggregator", new HttpChunkAggregator(65536));
pipeline.addLast("encoder", new HttpResponseEncoder());
pipeline.addLast("chunkedWriter", new ChunkedWriteHandler());
pipeline.addLast("handler", new HttpChunkedServerHandler());
return pipeline;
}
});
bootstrap.setOption("child.reuseAddress", true);
bootstrap.setOption("child.tcpNoDelay", true);
bootstrap.setOption("child.keepAlive", true);
// Bind and start to accept incoming connections.
bootstrap.bind(newInetSocketAddress(port));
}
public static void main(String[] args) {
int port;
if (args.length > 0) {
port = Integer.parseInt(args[0]);
} else {
port = 8080;
}
System.out.format("server start with port %d ", port);
new HttpChunkedServer(port).run();
}
}

package com.test.server;
import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE;
import static org.jboss.netty.handler.codec.http.HttpMethod.GET;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.METHOD_NOT_ALLOWED;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.OK;
import static org.jboss.netty.handler.codec.http.HttpVersion.HTTP_1_1;
import java.util.concurrent.atomic.AtomicInteger;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFutureListener;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ChannelStateEvent;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
import org.jboss.netty.handler.codec.frame.TooLongFrameException;
import org.jboss.netty.handler.codec.http.DefaultHttpChunk;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpChunk;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.util.CharsetUtil;
public class HttpChunkedServerHandlerextends SimpleChannelUpstreamHandler {
private static final AtomicInteger count = new AtomicInteger(0);
private void increment() {
System.out.format("online user %d", count.incrementAndGet());
}
private void decrement() {
if (count.get() <= 0) {
System.out.format("~online user %d", 0);
} else {
System.out.format("~online user %d", count.decrementAndGet());
}
}
@Override
public void messageReceived(ChannelHandlerContextctx, MessageEvent e)
throws Exception {
HttpRequest request = (HttpRequest) e.getMessage();
if (request.getMethod() != GET) {
sendError(ctx, METHOD_NOT_ALLOWED);
return;
}
sendPrepare(ctx);
increment();
}
@Override
public void channelDisconnected(ChannelHandlerContextctx,
ChannelStateEvent e) throws Exception {
decrement();
super.channelDisconnected(ctx, e);
}
@Override
public void exceptionCaught(ChannelHandlerContextctx, ExceptionEvent e)
throws Exception {
Throwable cause = e.getCause();
if (cause instanceof TooLongFrameException) {
sendError(ctx, BAD_REQUEST);
return;
}
}
private static void sendError(ChannelHandlerContext ctx,
HttpResponseStatus status) {
HttpResponse response = new DefaultHttpResponse(HTTP_1_1, status);
response.setHeader(CONTENT_TYPE, "text/plain; charset=UTF-8");
response.setContent(ChannelBuffers.copiedBuffer(
"Failure:" + status.toString() + "", CharsetUtil.UTF_8));
// Close the connection as soon as the error message is sent.
ctx.getChannel().write(response)
.addListener(ChannelFutureListener.CLOSE);
}
private void sendPrepare(ChannelHandlerContextctx) {
HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
response.setChunked(true);
response.setHeader(HttpHeaders.Names.CONTENT_TYPE,
"text/html; charset=UTF-8");
response.addHeader(HttpHeaders.Names.CONNECTION,
HttpHeaders.Values.KEEP_ALIVE);
response.setHeader(HttpHeaders.Names.TRANSFER_ENCODING,
HttpHeaders.Values.CHUNKED);
Channel chan = ctx.getChannel();
chan.write(response);
// 缓冲必须凑够256字节，浏览器端才能够正常接收 ...
StringBuilder builder = new StringBuilder();
builder.append("");
int leftChars = 256 - builder.length();
for (int i = 0; i < leftChars; i++) {
builder.append("");
}
writeStringChunk(chan, builder.toString());
}
private void writeStringChunk(Channelchannel, String data) {
ChannelBuffer chunkContent = ChannelBuffers.dynamicBuffer(channel
.getConfig().getBufferFactory());
chunkContent.writeBytes(data.getBytes());
HttpChunk chunk = new DefaultHttpChunk(chunkContent);
channel.write(chunk);
}
}

set CLASSPATH=.
nohup java -server -Xmx6G -Xms6G -Xmn600M -XX:PermSize=50M -XX:MaxPermSize=50M -Xss256K -XX:+DisableExplicitGC -XX:SurvivorRatio=1 -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:CMSFullGCsBeforeCompaction=0 -XX:+CMSClassUnloadingEnabled -XX:LargePageSizeInBytes=128M -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=80 -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+PrintClassHistogram -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC -Xloggc:gc.log -Djava.ext.dirs=lib com.test.server.HttpChunkedServer 8000>server.out 2>&1 &