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Subject: can I subclass Condition to create my own conditions for "waitfor"
 task?
Date: Fri, 19 Sep 2003 15:06:54 -0700
Message-ID: <1E0EF0D249F6504FAB1B26EA699E3C1D1CA4E3@mail.kaptechwest.com>
Thread-Topic: can I subclass Condition to create my own conditions for
 "waitfor" task?
thread-index: AcN++lWfb67T4TjuQ5CcEhtVu5Bd1w==
From: "Alan Bram" <ABram@kaptechwest.com>
To: <user@ant.apache.org>

Hello,

I've written an Ant task that I will use in running unit tests (under =
CruiseControl).  The task waits for my JBoss server to complete its =
start-up process.  It works via access to the JBoss JMX MBean for the =
Main Deployer, so that I know it's really ready before I start my tests.

I've patterned my code after the Ant "waitfor" task, in terms of =
allowing the user to specify frequency and time limit, both value and =
units independently, because I think that's pretty cool.  (I hate having =
to guess whether a time was specified in milliseconds, or seconds, or =
whatever.)

However, I suddenly realized that instead of making my code *like* Ant's =
"waitfor" task, it would be really cool if I could actually re-use it.  =
It seemed like I almost could, if only I could make up my own Condition =
(i.e., org.apache.tools.ant.taskdefs.condition.Condition).  The =
ConditionBase class (which is the base class of WaitFor) knows about =
only a fixed set of types of Condition's.  It seemed like I could almost =
add my own if I subclassed WaitFor, by adding my own addMyCondition() =
method.  But it looks like that won't quite work, because ConditionBase =
keeps its "conditions" field private.

Does anyone see a good way to make this work?

I suppose maybe I could just override the getConditions() method to =
ignore all other Condition's and just return my Condition.  But that =
seems a bit ugly?

I thank you in advance for any thoughts on this matter.

Sincerely,
 - Alan Bram

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