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From Gunnar Hillert <gun...@hillert.com>
Subject RE: [S2] ActionMessages and redirects
Date Tue, 05 Jun 2007 11:06:27 GMT

Hi,

Thanks for your response. Yes, I think the interceptor will do. However, it
just feels a bit clumsy to write 6 lines of XML in order to get
functionality that Struts 1 provided in one. It may be a great solution for
cases where your action messages have to survive multiple redirects but in
99.99% of my cases it is just one...and I am using quite a few of those in
my apps. Thus, I miss the Struts 1 solution :-)

Regards,

Gunnar



Al Sutton-3 wrote:
> 
> Hi Gunnar,
> 
> I've been through the same thing, so I can help you out :).
> 
> If your actions extend com.opensymphony.xwork2.ActionSupport you can then
> call the method;
> 
> addActionMessage("string")
> 
> Or
> 
> addActionError("string");
> 
> Please note, "string" is the literal message, not a key into a properties
> file.
> 
> If you want to use a properties file for multi-language systems you need
> to
> do the following;
> 
> addActionMessage(getText("key"))
> 
> Or
> 
> addActionError(getText("key"))
> 
> And create a file called package.properties in your action package (or at
> some point above in the package hierarchy) which has the translations.
> 
> You will need to use the message store interceptor where you are using a
> redirect (i.e. you will need it in the redirect to the get), you should
> note
> though, at the moment there appears to be a bug in that if you use
> addActionError, the message store interceptor, and you have the validation
> interceptor enabled you will get redirected to the input result of the
> action after the redirect :(.
> 
> Hope this helps,
> 
> Al.
> 
> -----Original Message-----
> From: Gunnar Hillert [mailto:gunnar@hillert.com] 
> Sent: 04 June 2007 05:52
> To: user@struts.apache.org
> Subject: [S2] ActionMessages and redirects
> 
> 
> Hi,
> 
> Still learning but I am really going to like Struts 2. An area where I
> find
> it a bit lacking though (Compared to Struts 1) is the support for action
> messages to survive redirects. 
> 
> I really like to follow the 'Post/Redirect/Get pattern' for most of my
> actions. 
> (See also
> http://www.theserverside.com/patterns/thread.tss?thread_id=20936)
> 
> Therefore in most of my actions I have the requirement that my success
> messages survive the next redirect.
> 
> In Struts 1 I can do:
> 
> messages.add(ActionMessages.GLOBAL_MESSAGE, 
>                        new ActionMessage("user.added"));
> saveMessages(request.getSession(), messages);
> 
> But there is nothing like this in Struts 2.
> 
> I did not find too much information about this requirement in Struts 2. 
> There are 2 open issues in Jira that touch the issue:
> 
> https://issues.apache.org/struts/browse/WW-1623
> https://issues.apache.org/struts/browse/WW-1572
> 
> On of the issues mentions the MessageStore interceptor but that looks a
> bit
> like overkill to me. (See also
> http://cwiki.apache.org/WW/message-store-interceptor.html)
> 
> Thus, for right now I am using Appfuse's solution of using a custom
> filter. 
> (See
> https://appfuse-light.dev.java.net/source/browse/appfuse-light/trunk/src/mai
> n/java/org/appfuse/web/MessageFilter.java)
> 
> This works great but somehow feels like a 'hack' (Had to do the same for
> my
> Spring MVC projects.)
> 
> * * *
> 
> In a perfect world I would like to see a feature similar to Ruby on Rails'
> Flash which allows you to not only store messages but any object in a
> Flash,
> and hence those objects survive the next redirect.
> 
> See also http://api.rubyonrails.com/classes/ActionController/Flash.html
> 
> But for the time being I would be already quite happy if there was a
> simple
> and standardized way to have my actionMessages survive redirects.
> 
> What is the status on that? Is this something that will be added to one of
> the next Struts 2 releases?
> 
> Thanks a lot! 
> 
> Regards,
> 
> Gunnar Hillert 
> 
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> 
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> 

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