Servlet ServletContextAttributeListener Arayüzü

Giriş

Şu satırı dahil ederiz

import javax.servlet.ServletContextAttributeListener;

Açıklaması şöyle

The ServletContextAttributeListener interface is for receiving notification events about ServletContext attribute changes. The order in which its implementations are invoked is unspecified.

Örnek

Şöyle yaparız

import javax.servlet.ServletContextAttributeEvent;
import javax.servlet.ServletContextAttributeListener;
import javax.servlet.annotation.WebListener;

@WebListener
public class MyServletContextAttributeListener implements ServletContextAttributeListener {

  public void attributeAdded(ServletContextAttributeEvent event) {
    System.out.println("context attr " + event.getName() + " added with value " +
      event.getValue());
  }

  public void attributeRemoved(ServletContextAttributeEvent event) {
    System.out.println("context attr " + event.getName() + " removed with value " +
      event.getValue());
  }

  public void attributeReplaced(ServletContextAttributeEvent event) {
    System.out.println("context attr " + event.getName() + " replaced with value " +
      event.getValue());
  }
}