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From "Craig Minton" <>
Subject Re: Capturing the ant output when starting ant from inside a servlet
Date Thu, 21 Mar 2002 16:03:04 GMT
I found the answer to my problem, so I thought I'd share it to help others
who may run across it.  My error was assuming that the output  you see from
Ant coming from System.err and System.out and that just redirecting that
would allow me to capture all the output.  To have all of the ant output go
to the same place, however,  you have to create a BuildLogger and add it to
the BuildListeners for your project.  If you do not do this, but only
redirect the System.err and System.out, you will only your the output your
own classes.  The best way to do this is the look at the source code to and follow what is done in there.  Pay
special attention to the createLogger() method and use the
addBuildListener() method in the Project class.  I hope this explanation
makes sense and that others may benefit from it.


----- Original Message -----
From: "Craig Minton" <>
To: <>
Sent: Wednesday, March 20, 2002 2:55 PM
Subject: Capturing the ant output when starting ant from inside a servlet

I have created a servlet that will kick off Ant and record all of the output
to log file. I also have created my own task that will pull my source files
from PVCS Dimensions. This runs perfectly when calling Ant from a command
line. For calling it from a servlet, I have essentially used the same code
that was inside to reroute System.out and System.err to a logfile,
create a project, and then execute the target. When I do this, however, the
ONLY output I get in the log file is the output for the task that pulls the
code from Dimensions. All other output seems to disappear, including the
target lines, such as init:, dist:, etc. The Ant script continues to run
correctly, I just do not receive any output. Again, I am calling the main
build.xml file which calls the task that pulls the code from Dimensions. I
am not calling that task directly. So I am very confused as to why I would
only be logging the output that my home-grown task creates.

Thanks to the archive of this user-list, I have been able to solve all of my
other problems, but this one has me stumped. Any advice would be greatly
appreciated and I will gladly answer questions if I have not provided enough
information here.

On a side note, I have to agree with others that parts of Ant are not
documented well, or at all. Case in point, the Project class. I was able to
find the information on how to use it on this mailing list archive, but it
would be very nice if that was included in the documentation and the methods
were documented.


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