001package org.apache.turbine.modules; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import org.apache.turbine.Turbine; 023import org.apache.turbine.pipeline.PipelineData; 024 025/** 026 * The purpose of this class is to allow one to load and execute Page 027 * modules. 028 * 029 * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a> 030 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> 031 * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a> 032 * @version $Id$ 033 */ 034public class PageLoader 035 extends GenericLoader<Page> 036{ 037 /** The single instance of this class. */ 038 private static PageLoader instance = new PageLoader(); 039 040 /** 041 * These ctor's are private to force clients to use getInstance() 042 * to access this class. 043 */ 044 private PageLoader() 045 { 046 super(Page.class, 047 () -> Turbine.getConfiguration().getInt(Page.CACHE_SIZE_KEY, 048 Page.CACHE_SIZE_DEFAULT)); 049 } 050 051 /** 052 * Attempts to load and execute the external page. 053 * 054 * @param pipelineData Turbine information. 055 * @param name Name of object that will execute the page. 056 * @throws Exception a generic exception. 057 */ 058 @Override 059 public void exec(PipelineData pipelineData, String name) 060 throws Exception 061 { 062 // Execute page 063 getAssembler(name).build(pipelineData); 064 } 065 066 /** 067 * The method through which this class is accessed. 068 * 069 * @return The single instance of this class. 070 */ 071 public static PageLoader getInstance() 072 { 073 return instance; 074 } 075}