Is there any good way to display success message.

[daigo]

I'm searching class that is similar to struts' ActionMessage. I can display error message easily because of Errors interface. But I can't do same way about success message(s).

Should I have to set success message hand by hand?

[gmatthews]

I think this is actually a (very rare) short coming in Spring.

I think Errors should have been called Messages and provided some sort of parameterised message level, e.g. Error, Warning, Info, similar to logging.

We've done just that, and pass a Messages interface into the service layer from our controllers, and let the service + business layers populate Messages with message keys + message levels.

These are then published into Errors or our own session based object for publishing in JSP pages. We use a session since messages then survive redirects. The JSP panel responsible for displaying any info messages then clears the session based message store.

There's probably a better way but this seems to work ok for us.

[daigo]

Thank you for replying. Your Messages interface way is exactly what I need.
And I completely agree with your opinion about shortcoming in Spring. Is it already posted in jira?

By the way, how about tag library about Messages? Do you create it your self?

[gmatthews]

Its nothing very complicated, and no its not in Jira.


public interface Messages {

void addMessage(String key, MessageLevel level);

void addMessage(String key, Object[] params, MessageLevel level);

Iterator<Message> getErrors();

boolean isEmpty();

boolean isErrors();

Iterator<Message> getInfoAndWarnings();
}

[daigo]

I posted jira. http://opensource.atlassian.com/projects/spring/browse/SPR-2657

I'm using spring web flow with jsp, so I have to create some message interface helper method to action that extends FormAction and tag libraries.