Chain of Responsibility - 처리자 연결하기

When Using It

다수의 처리자들을 연결하고 싶을때

Class Diagram

Sample Code



public abstract class Handler {

private Handler nextHandler;

public abstract boolean handleRequest();

public final void setNext(Handler handler) {

this.nextHandler = handler;

}

public final void process() {

if (handleRequest() == false) {

if ( nextHandler != null) {

nextHandler.handleRequest();

}

}

}

}

public class ConcreteHandler extends Handler {

@Override

public boolean handleRequest() {

return false;

}

}

public class ConcreteHandler2 extends Handler {

@Override

public boolean handleRequest() {

return true;

}

}

public class Client {

public void process() {

Handler handler1 = new ConcreteHandler();

Handler handler2 = new ConcreteHandler2();

handler1.setNext(handler2);

handler1.process();

}

}

Caution

특별한 주의사항은 없다.