AsynchronousServerSocketChannel

AsynchronousServerSocketChannel

AsynchronousServerSocketChannel allows you to build asynchronous network servers that can handle many concurrent connections with very few threads.

How it Works

The accept() method returns immediately, and a completion handler is called when a new connection is established. This pattern is ideal for high-performance server-side applications.

Java Example

import java.net.InetSocketAddress;
import java.nio.channels.*;

public class AsyncServerExample {
    public static void main(String[] args) throws Exception {
        AsynchronousServerSocketChannel server = AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(8080));
        System.out.println("Server listening on 8080...");
        // server.accept(null, new CompletionHandler<AsynchronousSocketChannel, Object>() { ... });
    }
}

Output

Server listening on 8080...

Key Points

• Non-blocking server socket
• Uses CompletionHandler for connections
• Highly scalable
• Reduces thread overhead