| AW: pingURL: A better way to start and stop application servers? | AW: pingURL: A better way to start and stop application servers? 2003-02-12 - By Jan.Materne@(protected)
ASAIK there are plans (ideas? wishes?) on the Dev-List for realizing
a async-option (or task) for <java>, <exec> and <apply>.
But I?m not sure - especially when it will be done.
Jan Mat?rne
-----Urspr?ngliche Nachricht-----
Von: Philip Aston [mailto:paston@(protected)]
Gesendet am: Dienstag, 11. Februar 2003 15:48
An: Ant Users List
Betreff: Re: pingURL: A better way to start and stop application
servers?
Philip Aston writes last April:
> [old thread, I've been busy]
Positively historic now.
> Steve Loughran writes:
> > You can use <waitfor> to probe a url with controlled sleep time
> > and timeout interval, sets a property on success, etc.
> >
> > All pingurl does is add a container wrapper, but it only allows
> > url 2XX conditions to be evaluated (presumably); <waitfor> can
> > probe any port for being openable, plus all the other conditions
> > that are possible
>
> Yep, waitfor is more generic and wins. Roll on 1.5 :-)
I _finally_ got around to trying this. I used something like:
<target name="start-server">
<parallel>
<sequential>
<java><!-- start server --></java>
</sequential>
<waitfor><http url="http://localhost:7001/"/></waitfor>
</parallel>
</target>
However, this doesn't do the same as:
<target name="start-server">
<pingURL testURL="http://localhost:7001/" waitUntil="alive">
<java><!-- start server --></java>
</pingURL>
</target>
The difference between the two is that the <parallel> construct does
not exit until the server exits, whereas pingURL launches the "start
server" work in its own thread. With pingURL I can have my unit test
targets depend on start-server. AFAICS, I can't achieve the same with
standard ANT tasks.
As a random suggestion, perhaps there could be a "asynchronous" option
for <java> so you could do:
<java asynchronous="true"><!-- start server --></java>
<waitfor><http url="http://localhost:7001/"/></waitfor>
Any comments?
- Phil
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