001// Copyright 2010 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 017import org.apache.tapestry5.internal.structure.PageResetListener; 018import org.apache.tapestry5.runtime.PageLifecycleListener; 019import org.apache.tapestry5.services.ComponentEventLinkEncoder; 020 021/** 022 * Constants needed by end-user classes. 023 * 024 * @since 5.2.0 025 */ 026public class TapestryConstants 027{ 028 029 /** 030 * The extension used for Tapestry component template files, <em>T</em>apestry <em>M</em>arkup <em>L</em>anguage. 031 * Template files are well-formed XML files. 032 */ 033 public static final String TEMPLATE_EXTENSION = "tml"; 034 035 /** 036 * Name of query parameter that is placed on "loopback" links (page render links for the same 037 * page). This mostly includes the redirects sent after a component event request. Page render 038 * requests 039 * that do <em>not</em> have the LOOPBACK query parameter will trigger a {@linkplain PageResetListener reset 040 * notification} after the initialization event; the 041 * LOOPBACK 042 * prevents this reset notification. 043 * 044 * @since 5.2.0 045 * @see ComponentEventLinkEncoder#createPageRenderLink(org.apache.tapestry5.services.PageRenderRequestParameters) 046 * @see ComponentEventLinkEncoder#decodePageRenderRequest(org.apache.tapestry5.services.Request) 047 * @see PageResetListener 048 */ 049 public static final String PAGE_LOOPBACK_PARAMETER_NAME = "t:lb"; 050 051}