[mod_python] Problem in executing java program using mod_python.

On 16/08/2005, at 8:23 PM, Manjeet Chaudhary wrote:
>                command = "export  
> CLASSPATH=/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/lucene 
> -1.4.3.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/PDFBox 
> -0.6.7a.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/log4j 
> -1.2.8.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/tm-extractors 
> -0.4.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/ArabicAnalyzer 
> -1.0b.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/commons- 
> collections-3.1.jar"
>                import os
>                os.system(command)
>                command = "java -classpath  
> $CLASSPATH:/home/ajinkyan/cgi-bin/infoviewer SearchFiles"
>                check=os.system(command)

That will not work.

The shell invoked by each call of os.system() is independent. Exporting
environment variables in one os.system() call does not make them
visible in a subsequence os.system() call.

Try the following instead:

                command =  
"CLASSPATH=/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/lucene 
-1.4.3.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/PDFBox 
-0.6.7a.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/log4j 
-1.2.8.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/tm-extractors 
-0.4.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/ArabicAnalyzer 
-1.0b.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/commons- 
collections-3.1.jar java -classpath  
$CLASSPATH:/home/ajinkyan/cgi-bin/infoviewer SearchFiles"
                check=os.system(command)

Or better still:

                 
os.putenv("CLASSPATH","/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/ 
lucene-1.4.3.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/PDFBox 
-0.6.7a.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/log4j 
-1.2.8.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/tm-extractors 
-0.4.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/ArabicAnalyzer 
-1.0b.jar:/home/ajinkyan/cgi-bin/infoviewer/Jar_Files/commons- 
collections-3.1.jar")
                command = "java -classpath  
$CLASSPATH:/home/ajinkyan/cgi-bin/infoviewer SearchFiles"
                check=os.system(command)

Note that the current working directory of the process when os.system()  
is
run is probably "/" and the PATH will not necessarily be useful. You may
therefore have to give the explicit path to the "java" program.

Graham