3

I want a String in Java code whose value is set in a python script. Can I set it as a System Property from the script in order to use it with System.getProperty() method. Is there some way to achieve this or using some other approach?

Ayush Jindal
  • 83
  • 1
  • 2
  • 5
  • You may use Jython ans reverse the problem – Aubin Nov 10 '12 at 12:40
  • Depending on the concrete task of the java application it may also be more appropriate to pass the value as a simple command line argument. – raymi Nov 10 '12 at 12:56

3 Answers3

4

If you are using pyspark you can use the setSystemProperty() method of the SparkContext, e.g. 

import pyspark
sc=pyspark.SparkContext()
sc.setSystemProperty("com.amazonaws.services.s3.enableV4", "true")
asmaier
  • 11,132
  • 11
  • 76
  • 103
2

You can set a Java property on the command line like this:

java -D<propertyName1>=<propertyVal1> -D<propertyName2>=<propertyVal2> ...

The System.getProperty("propertyName1") will return "propertyVal1".

Example:

java -Dfile.encoding=utf-8 -jar MyJar.jar

This will work in a bash script. I've never tried it from Python, but i guess this answer might help you achieve that.

Community
  • 1
  • 1
Filip
  • 1,451
  • 1
  • 11
  • 19
0

If you are using Jython, you can import java.lang.System class and call the System.setProperty() method to set whatever system properties you want to set:

Code snippets:

from java.lang import System
System.setProperty('app.env', 'DEV')

from yourpackage import YourMainClass
args = ['Your','Args']
YourMainClass.main(args)
Fengzmg
  • 710
  • 8
  • 9