Eri*_*rik 6 java sql multithreading nio
我正在尝试计算我必须构建的服务器上的负载.
我需要创建一个服务器,在SQL数据库中注册了一百万用户.在一周内,每个用户将大约连接3-4次.每次用户启动并下载1-30 MB数据时,可能需要1-2分钟.
上传完成后,将在几分钟内删除.(在计算中更新文本删除错误)
我知道如何制作和查询SQL数据库,但在这种情况下要考虑什么?
我正在使用 Netty 来实现类似的场景。它只是在工作!
这是使用 netty 的起点:
public class TCPListener {
private static ServerBootstrap bootstrap;
public static void run(){
bootstrap = new ServerBootstrap(
new NioServerSocketChannelFactory(
Executors.newCachedThreadPool(),
Executors.newCachedThreadPool()));
bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
public ChannelPipeline getPipeline() throws Exception {
TCPListnerHandler handler = new MyHandler();
ChannelPipeline pipeline = Channels.pipeline();
pipeline.addLast("handler", handler);
return pipeline;
}
});
bootstrap.bind(new InetSocketAddress(9999)); //port number is 9999
}
public static void main(String[] args) throws Exception {
run();
}
}
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和 MyHandler 类:
public class MyHandler extends SimpleChannelUpstreamHandler {
@Override
public void messageReceived(
ChannelHandlerContext ctx, MessageEvent e) {
try {
String remoteAddress = e.getRemoteAddress().toString();
ChannelBuffer buffer= (ChannelBuffer) e.getMessage();
//Now the buffer contains byte stream from client.
} catch (UnsupportedEncodingException ex) {
ex.printStackTrace();
}
byte[] output; //suppose output is a filled byte array
ChannelBuffer writebuffer = ChannelBuffers.buffer(output.length);
for (int i = 0; i < output.length; i++) {
writebuffer.writeByte(output[i]);
}
e.getChannel().write(writebuffer);
}
@Override
public void exceptionCaught(
ChannelHandlerContext ctx, ExceptionEvent e) {
// Close the connection when an exception is raised.
e.getChannel().close();
}
}
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