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/** Factored out the list of jvm-options from at least two other interfaces that have them: java-config and profiler.
* Similar to {@link PropertyBag}
*/
/** It's observed that many a time we need the value of max heap size. This is useful when deciding if a
* user is misconfiguring the JVM by specifying -Xmx that is smaller than -Xms. Sun's JVM for example,
* bails out with <code> Incompatible minimum and maximum heap sizes specified</code> when that happens.
* It's generally better to do some basic validations in those cases and that's when this method may be useful.
* @return an integer specifying the actual max heap memory (-Xmx) configured. If it's specified as -Xmx2g, then 2*1024
* i.e. 2048 is returned. Returns -1 if no -Xmx is specified.
*/
int getXmxMegs();
/** see #getXmxMegs
* @return integer specifying -Xms in megabytes, or -1*/
int getXmsMegs();
class Duck {
/* Note: It does not take defaults into account. Also,
* I have tested that server does not start with a heap that is less than 1m, so I think I don't have to worry about
* -Xmx that is specified to be less than 1 MB. Again, there is lots and lots of platform dependent code here,
* so this check should be minimal. Again, I am doing this kind of check here because while testing, I was
* able to get into a situation where -Xmx is configured smaller than -Xms and the server won't start. The user
* then must edit the domain.xml by hand!
*/
}
}
}
}
return -1;
}
return -1;
try {
return Integer.parseInt(second.substring(0, second.length()-1)) * 1024; //I don't think we'll have an overflow
else
return Integer.parseInt(second) / (1024*1024); //bytes, this is a rare case, hopefully -- who does -Xmx1073741824 to specify a meg?
} catch(NumberFormatException e) {
//squelch all exceptions
return -1;
} catch(RuntimeException e) {
//squelch all exceptions
return -1;
}
}
}
return opt;
}
return null;
}
}
}