Bug #3147

Get rid of Swing componets in Ecogrid data access classes

Added by Jing Tao over 14 years ago. Updated over 14 years ago.

data access
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Here is an email from Matt:


I noticed you're having difficulty with calling the ecogrid data access classes from within JUnit tests. This illustrates an
underlying problem in the implementation -- that it depends on GUI classes -- that would also surface when running kepler in headless
mode on the command line or behind a web interface. Rather than calling JOptionPane directly, you should probably be callinga
mediator class like ptolemy.util.MessageHandler that can be configured to do different things depending on whether it has a GUI
available or just stdout available. This design follows the basic Mediator pattern and would help in improving the overall design. I
think anytime you are instantiating Swing components in an actor we are possibly limiting the execution environment of the actor.

Can you factor out these alerts so that the use the mediator pattern?



#1 Updated by Christopher Brooks over 14 years ago

Actually, calling MessageHandler can result in problems, especially anything
that requires an answer, such as yesNoQuestion() and yesNoCancelQuestion().

It is usually better to throw an exception for problems than to ask the
user if they want to proceed, or to properly set the default behaviour

One use of yesNoQuestion() that seems to come up fairly often is whether a
file should be overwritten. I've found the best thing is to have a parameter
"overwriteFiles" which defaults to true. Otherwise, the user is bombarded
with dialogs.

#2 Updated by ben leinfelder over 14 years ago

I believe this is fixed. There was spot in the EML actor that was using Swing directly, but I replaced that with MessageHandler. Jing did this with some other classes, too.

#3 Updated by Jing Tao over 14 years ago

As ben said, this bug was fixed.

#4 Updated by Redmine Admin over 9 years ago

Original Bugzilla ID was 3147

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