001/* 002 * Copyright 2002-2015 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.web.context.request; 018 019import java.io.Serializable; 020 021import javax.servlet.http.HttpSessionBindingEvent; 022import javax.servlet.http.HttpSessionBindingListener; 023 024/** 025 * Adapter that implements the Servlet HttpSessionBindingListener interface, 026 * wrapping a session destruction callback. 027 * 028 * @author Juergen Hoeller 029 * @since 3.0 030 * @see RequestAttributes#registerDestructionCallback 031 * @see ServletRequestAttributes#registerSessionDestructionCallback 032 */ 033@SuppressWarnings("serial") 034public class DestructionCallbackBindingListener implements HttpSessionBindingListener, Serializable { 035 036 private final Runnable destructionCallback; 037 038 039 /** 040 * Create a new DestructionCallbackBindingListener for the given callback. 041 * @param destructionCallback the Runnable to execute when this listener 042 * object gets unbound from the session 043 */ 044 public DestructionCallbackBindingListener(Runnable destructionCallback) { 045 this.destructionCallback = destructionCallback; 046 } 047 048 049 @Override 050 public void valueBound(HttpSessionBindingEvent event) { 051 } 052 053 @Override 054 public void valueUnbound(HttpSessionBindingEvent event) { 055 this.destructionCallback.run(); 056 } 057 058}