001 // Copyright 2004, 2005 The Apache Software Foundation 002 // 003 // Licensed under the Apache License, Version 2.0 (the "License"); 004 // you may not use this file except in compliance with the License. 005 // You may obtain a copy of the License at 006 // 007 // http://www.apache.org/licenses/LICENSE-2.0 008 // 009 // Unless required by applicable law or agreed to in writing, software 010 // distributed under the License is distributed on an "AS IS" BASIS, 011 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 // See the License for the specific language governing permissions and 013 // limitations under the License. 014 015 package org.apache.tapestry.services; 016 017 /** 018 * Used by other services to obtain cookie values for the current request. 019 * 020 * @author Howard Lewis Ship 021 * @since 4.0 022 */ 023 public interface CookieSource 024 { 025 /** 026 * Returns the value of the first cookie whose name matches. Returns null if no such cookie 027 * exists. 028 */ 029 public String readCookieValue(String name); 030 031 /** 032 * Creates or updates a cookie value. The value is stored permanently (no timeout, not session 033 * based). TODO: add suport for timeouts and session cookies. 034 */ 035 036 public void writeCookieValue(String name, String value); 037 038 /** 039 * Removes a previously written cookie, by writing a new cookie with a maxAge of 0. 040 */ 041 042 public void removeCookieValue(String name); 043 }