accessing VM command line from code

[angelochen960]

Hi,

Is there a way to access VM command line parameters from a java code,
particularly a servlet ? Thanks

A.c

 

[Giovanni Azua]

Hi there,

Is there a way to access VM command line parameters from a java code,
particularly a servlet ? Thanks

You can use Runtime.exec:
http://java.sun.com/javase/6/docs/api/java/lang/Runtime.html

and execute the command "$JAVA_HOME/bin/jps -v"

then you have to:

1) Find the appropriate Servlet process e.g. the String contains tomcat
1) parse the output for all command line parameters ...

HTH,
regards,
Giovanni

 

[Giovanni Azua]

if you know the process id beforehand and assuming Unix environment then you
only need to execute:

"$JAVA_HOME/bin/jps -v | grep <pid>"

jps also works remotely so you can specify the remote host to connect to.

HTH,
regards,
Giovanni

 

[Arne Vajhøj]

Is there a way to access VM command line parameters from a java code,
particularly a servlet ? Thanks

The best I can find is:

RuntimeMXBean rtmb = ManagementFactory.getRuntimeMXBean();
for(String s : rtmb.getInputArguments()) {
System.out.println(s);
}

Arne