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/* * Copyright 2003,2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.struts.chain; import org.apache.commons.chain.Command; import org.apache.commons.chain.Context; import org.apache.commons.chain.web.WebContext; import org.apache.struts.config.ModuleConfig; /** * <p>Check to see if the controller is configured to prevent caching, * and if so, request no cache flags to be set.</p> * * @author Don Brown * @version $Rev: 54933 $ $Date: 2004-10-16 18:04:52 +0100 (Sat, 16 Oct 2004) $ */ public abstract class AbstractRequestNoCache implements Command { // ------------------------------------------------------ Instance Variables private String moduleConfigKey = Constants.MODULE_CONFIG_KEY; // -------------------------------------------------------------- Properties /** * <p>Return the context attribute key under which the * <code>ModuleConfig</code> for the currently selected application * module is stored.</p> */ public String getModuleConfigKey() { return (this.moduleConfigKey); } /** * <p>Set the context attribute key under which the * <code>ModuleConfig</code> for the currently selected application * module is stored.</p> * * @param moduleConfigKey The new context attribute key */ public void setModuleConfigKey(String moduleConfigKey) { this.moduleConfigKey = moduleConfigKey; } // ---------------------------------------------------------- Public Methods /** * <p>Check to see if the controller is configured to prevent caching, * and if so, request no cache flags to be set.</p> * * @param context The <code>Context</code> for the current request * * @return <code>false</code> so that processing continues */ public boolean execute(Context context) throws Exception { // Retrieve the ModuleConfig instance WebContext wcontext = (WebContext) context; ModuleConfig moduleConfig = (ModuleConfig) wcontext.get(getModuleConfigKey()); // If the module is configured for no caching, request no caching if (moduleConfig.getControllerConfig().getNocache()) { requestNoCache(context); } return (false); } // ------------------------------------------------------- Protected Methods /** * <p>Request no cache flags are set.</p> * * @param context The <code>Context</code> for this request */ protected abstract void requestNoCache(Context context); }