craigmcc 02/03/20 17:42:42
Modified: src/share/org/apache/struts/actions LocalStrings.properties
Added: src/share/org/apache/struts/actions SwitchAction.java
Log:
Add a standard action that makes it easy to switch between sub-applications
(surprisingly hard to do with, because the selected ApplicationConfig and
MessageResources are normally based solely on the original request URI). Now,
assuming you have mapped this to path "/switch", you can set up a hyperlink
that goes to the "/menu.do" action of the sub-application at prefix "/bar":
<html:link page="/switch.do?prefix=/bar&page=/menu.do">...</html:link>
Revision Changes Path
1.3 +2 -1
jakarta-struts/src/share/org/apache/struts/actions/LocalStrings.properties
Index: LocalStrings.properties
===================================================================
RCS file:
/home/cvs/jakarta-struts/src/share/org/apache/struts/actions/LocalStrings.properties,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- LocalStrings.properties 10 May 2001 03:13:33 -0000 1.2
+++ LocalStrings.properties 21 Mar 2002 01:42:42 -0000 1.3
@@ -8,4 +8,5 @@
forward.rd=Cannot create request dispatcher for path {0}
include.path=No context-relative URI specified via the 'parameter' attribute
include.rd=Cannot create request dispatcher for path {0}
-
+switch.prefix=Invalid sub-application prefix {0} was specified
+switch.required=Switch requires both 'prefix' and 'path' request parameters
1.1
jakarta-struts/src/share/org/apache/struts/actions/SwitchAction.java
Index: SwitchAction.java
===================================================================
/*
* $Header:
/home/cvs/jakarta-struts/src/share/org/apache/struts/actions/SwitchAction.java,v 1.1
2002/03/21 01:42:42 craigmcc Exp $
* $Revision: 1.1 $
* $Date: 2002/03/21 01:42:42 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Struts", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [EMAIL PROTECTED]
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.struts.actions;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.config.ApplicationConfig;
import org.apache.struts.util.MessageResources;
/**
* <p>A standard <strong>Action</strong> that switches to a new sub-application
* and then forards control to a URI (specified in a number of possible ways)
* within the new sub-application.</p>
*
* <p>Valid request parameters for this Action are:</p>
* <ul>
* <li><strong>page</strong> - Application-relative URI (beginning with "/")
* to which control should be forwarded after switching.</li>
* <li><strong>prefix</strong> - The application prefix (beginning with "/")
* of the sub-application to which control should be switched. Use a
* zero-length string for the default sub-application. The
* appropriate <code>ApplicationConfig</code> object will be stored as a
* request attribute, so any subsequent logic will assume the new
* sub-application.</li>
* </ul>
*
* @author Craig R. McClanahan
* @version $Revision: 1.1 $ $Date: 2002/03/21 01:42:42 $
* @since 1.1
*/
public class SwitchAction extends Action {
// ----------------------------------------------------- Instance Variables
/**
* Commons Logging instance.
*/
protected Log log = LogFactory.getLog(this.getClass());
/**
* The message resources for this package.
*/
protected static MessageResources messages =
MessageResources.getMessageResources
("org.apache.struts.actions.LocalStrings");
// --------------------------------------------------------- Public Methods
/**
* Process the specified HTTP request, and create the corresponding HTTP
* response (or forward to another web component that will create it),
* with provision for handling exceptions thrown by the business logic.
*
* @param mapping The ActionMapping used to select this instance
* @param form The optional ActionForm bean for this request (if any)
* @param request The HTTP request we are processing
* @param response The HTTP response we are creating
*
* @exception Exception if the application business logic throws
* an exception
*/
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
// Identify the request parameters controlling our actions
String page = request.getParameter("page");
String prefix = request.getParameter("prefix");
if ((page == null) || (prefix == null)) {
String message = messages.getMessage("switch.required");
log.error(message);
response.sendError(HttpServletResponse.SC_BAD_REQUEST,
message);
return (null);
}
// Switch to the requested sub-application
ApplicationConfig config = (ApplicationConfig)
getServlet().getServletContext().getAttribute
(Action.APPLICATION_KEY + prefix);
if (config == null) {
String message = messages.getMessage("switch.prefix", prefix);
log.error(message);
response.sendError(HttpServletResponse.SC_BAD_REQUEST,
message);
return (null);
}
request.setAttribute(Action.APPLICATION_KEY + prefix, config);
MessageResources resources = (MessageResources)
getServlet().getServletContext().getAttribute
(Action.MESSAGES_KEY + prefix);
if (resources != null) {
request.setAttribute(Action.MESSAGES_KEY + prefix, resources);
} else {
request.removeAttribute(Action.MESSAGES_KEY + prefix);
}
// Forward control to the specified application-relative URI
return (new ActionForward(page));
}
}
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