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Subject: RE: Stdout of Java.execute() without going through a file?
Date: Sun, 15 Aug 2004 16:17:01 -0500
Message-ID: 
 <A672996F85AA7240A9DD2A455BD0D4283AB439@HOUEXCH902.landmark.lgc.com>
Thread-Topic: Stdout of Java.execute() without going through a file?
Thread-Index: AcSCSOi78TB01TD3TlGz7xLjlFT7fwAwyeuw
From: "Dominique Devienne" <DDevienne@lgc.com>
To: "Ant Developers List" <dev@ant.apache.org>

> From: Vincent Massol [mailto:vmassol@pivolis.com]
>=20
> I'm using the Ant Java task to start J2EE containers. However, in
order to
> know if they are started I'd like to read the stdout produced by these
> containers. Now there are 2 solutions I know of:
>=20
> - using java.setOutputProperty(). The problem is that the property is
only
> set when the execute() command returns which doesn't work for several
> containers that do not return (Orion for example).
>=20
> - using java.setOutput(File). However this goes to a file and I'd
rather
> not
> use it for 2 reasons: I'd rather not have to output to a file as I may
not
> always have a handy location for that file (I'd rather not use tmp dir
> either) + I'd like to make the file output optional, decided by the
user.
>=20
> My question: Is there a way I can use to monitor the stdout content
> resulting from the execution of execute() without going through a
file?

Seems like you are doing this in code, rather than in XML, but in either
case there is a third solution that uses <record> or its underlying
mechanism, BuildListerners. With <record>, you'd be forced to go thru a
file still, but by implementing your own listener like Record does, and
installing it prior to Java.execute(), you can monitor the messages and
do what you asked about it would seem. You can then uninstall the
listener when you've detected the message you expected, or after
Java.execute complete (or throws) in case the startup of the J2EE server
failed.

Not sure if this applies to what you had in mind without more details,
but hopefully that helps. A+, --DD

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