001// Copyright 2008-2013 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
015package org.apache.tapestry5;
016
017/**
018 * Constants for persistent field strategies.
019 * 
020 * @see org.apache.tapestry5.annotations.Persist#value()
021 */
022public class PersistenceConstants
023{
024    /**
025     * The field's value is stored in the {@link org.apache.tapestry5.http.services.Session}.
026     */
027    public static final String SESSION = "session";
028
029    /**
030     * The field's value is stored on the client, as a query parameter or hidden form field.
031     */
032    public static final String CLIENT = "client";
033
034    /**
035     * The field's value is stored in the session, but only until the next request. This is often
036     * used for confirmation messages presented to the user.
037     */
038    public static final String FLASH = "flash";
039}