/*
* 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 $Revision: 1.3 $ $Date: 2004/04/29 03:08:44 $
*/
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);
}