在Netty中,可以通过以下方式来设置最大连接数:
ServerBootstrap serverBootstrap = new ServerBootstrap();
serverBootstrap.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.option(ChannelOption.SO_BACKLOG, 100) // 设置最大连接数为100
.childHandler(new MyChannelInitializer());
public class MyChannelInitializer extends ChannelInitializer<SocketChannel> {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast(new ConnectionCountHandler()); // 添加连接数监听处理器
pipeline.addLast(new MyHandler1());
pipeline.addLast(new MyHandler2());
}
}
public class ConnectionCountHandler extends ChannelInboundHandlerAdapter {
private static AtomicInteger connectionCount = new AtomicInteger();
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
int currentCount = connectionCount.incrementAndGet();
if (currentCount > 100) {
ctx.channel().close(); // 关闭连接
}
super.channelActive(ctx);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
connectionCount.decrementAndGet();
super.channelInactive(ctx);
}
}
通过上述方式,可以设置最大连接数并监听连接数,并在达到最大连接数时关闭新的连接。