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From Robert Koberg <>
Subject Re: howto trigger an Ant build within java
Date Thu, 29 Jan 2004 16:04:38 GMT
[moving to dev list]

Jim Fuller wrote:

>>From: Robert Koberg [] 
>>Sent: 29 January 2004 02:49
>>Subject: howto trigger an Ant build within java
>>I am looking into using Ant (v1.6.0) more in my webapp so I can offer 
>>offline publishing equivalents. I am transforming some config 
>>XML into a 
>>build file. I then want to load that build file into a new 
>> The build.xml gets produce properly (it 
>>runs successfully from the command line).
> So the transformation of config file is happening in your app which
> ultimately generates a build file, which in turn you would like to
> simply run ant on ?

The configs are held in memory(jdom) and eventually I would like to use 
/something/ like a chained transformation to go from the configs to an 
ant build in memory and run the build on a user chosen target.  I would 
use the build file to present a 'nav' tree similar to what eclipse does. 
The user clicks on a target to do things like generate a 
site/folder/page or promote to a vhost stage (local or remote) based on 
their config.

>>How do I load the build file and create an ant project, then 
>>trigger a 
>>particular target to execute? The build file uses only Core 
>>Tasks (and 
>>an xmlcatalog). Is there a simple example somewhere? I have tried 
> Hello Rob,
> If you are physically generating the build file then just use the
> launcher in the
> package. Though perhaps you want more
> control 

yes, more control

> Which is where I can highly recc the use of jelly

I will look into this.

> I have found that there are some 'gotchas' with such dynamic
> instantiation and running of a build direct from ant api, though this
> could be down to my own limited knowledge.

Yes, I have seen some warnings on this. I was hoping there would be a 
way to do this with ant and still be safe. I will move this to the dev 
list and see if someone there can help.


> Cheers, Jim Fuller
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