Messages in session scope / flash scope

[Michael Jouravlev <jm...@gmail.com>]

Struts automatically removes messages from session scope after they
were shown. This is good, but what if I have store messages under a
key different from Globals.MESSAGE_KEY and Globals.ERROR_KEY? (I want
to use different keys because I have different sections on a page, or
for Ajax regions, so I need to separate error messages for each
section).

The easiest solution would be to define a static non-final ArrayList
or just an array right in the Globals class like this:

String[] FLASH_MSGS = new String[] {Globals.MESSAGE_KEY, Globals.ERROR_KEY};

Then users would be able customize this array in their applications,
adding more keys they use. Then processCachedMessages() would simply
iterate over array and remove messages.

Creating a whole new FlashScope object would be more complex, but
would allow to not define flash IDs beforehand.

By the way, processCachedMessages() is marked as "@since Struts 1.2".
Wow, I thought that this feature appeared in 1.2.6.

If there is interest for this, I can open a Bugzilla ticket and
prepare a patch. Which solution is better? Maybe someone wants to
suggest a different one.

Michael.

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