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; 020import javax.servlet.http.HttpSessionBindingEvent; 021import javax.servlet.http.HttpSessionBindingListener; 022 023/** 024 * Adapter that implements the Servlet HttpSessionBindingListener interface, 025 * wrapping a session destruction callback. 026 * 027 * @author Juergen Hoeller 028 * @since 3.0 029 * @see RequestAttributes#registerDestructionCallback 030 * @see ServletRequestAttributes#registerSessionDestructionCallback 031 */ 032@SuppressWarnings("serial") 033public class DestructionCallbackBindingListener implements HttpSessionBindingListener, Serializable { 034 035 private final Runnable destructionCallback; 036 037 038 /** 039 * Create a new DestructionCallbackBindingListener for the given callback. 040 * @param destructionCallback the Runnable to execute when this listener 041 * object gets unbound from the session 042 */ 043 public DestructionCallbackBindingListener(Runnable destructionCallback) { 044 this.destructionCallback = destructionCallback; 045 } 046 047 048 @Override 049 public void valueBound(HttpSessionBindingEvent event) { 050 } 051 052 @Override 053 public void valueUnbound(HttpSessionBindingEvent event) { 054 this.destructionCallback.run(); 055 } 056 057}