Java - Event-driven vs Multithread 에 관련하여

while ( true ) {
  final Socket sock = acceptConnection();
  Thread t = new Thread() {
    public void run() {
      HttpRequest req = parseRequest(sock);
      HttpResponse resp = createResponse(req);
      sendResponse(sock, resp);
      sock.close();
    }
  };
  t.start();
}

public interface ParseDone {
  public void run(HttpRequest req);
}
void parseRequest(Socket sock, ParseDone done) { ... }
void sendResponse(Socket sock, HttpResponse resp, Runable done) { ... }
 
 
while ( true ) {
  final socket sock = acceptConnection();
  ParseDone parseDone = new ParseDone() {
    public void run(HeepRequest req) {
      HttpResponse resp = createResponse(req);
      Runnable sendResponseDone = new Runnable() {
        public void run() { sock.close(); }
      };
      sendResponse(sock, resp, sendResponseDone);
    }
  };
  parseRequest(sock, parseDone);
}

<span>자료 출처 - <a href="http://www.bamboo-dht.org/async-tutorial/async-tutorial.pdf" rel="nofollow">http://www.bamboo-dht.org/async-tutorial/async-tutorial.pdf</a></span>
 
public interface ParseDone {
  public void run(HttpRequest req);
}
void parseRequest(Socket sock, ParseDone done) { ... }
void sendResponse(Socket sock, HttpResponse resp, Runable done) { ... }
 
The idea is that parseRequest will now return immediately after being called, and sometime later,
when the request has actually been read off the network and parsed, the run function of the ParseDone
object passed into parseRequest will be called. Likewise, sendResponse will also return immediately,
and the run function of the Runnable object passed into sendResponse will be called later, once
the response has been sent.
Ignore for a moment how these new versions of parseRequest and sendResponse are implemented,
and consider only how we might use them. For example, we could rewrite the web server’s main
loop like this:
 
while ( true ) {
  final socket sock = acceptConnection();
  ParseDone parseDone = new ParseDone() {
    public void run(HeepRequest req) {
      HttpResponse resp = createResponse(req);
      Runnable sendResponseDone = new Runnable() {
        public void run() { sock.close(); }
      };
      sendResponse(sock, resp, sendResponseDone);
    }
  };
  parseRequest(sock, parseDone);
}