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From "Geir Magnusson Jr." <g...@pobox.com>
Subject Re: [classlib][launcher]shall we handle the parameter -version and -showversion in launcher or vm?
Date Thu, 12 Oct 2006 18:19:50 GMT


Tim Ellison wrote:
> Leo Li wrote:
>> Due to current VMI, we have to first create a java VM through 
>> JNI_CreateJavaVM, then we can get property from functions defined by 
>> VMI. It is possible not to change current vmi design and support java
>> -version, but
>> we have to create and then "kill" a new java vm. So I think it quite 
>> wastes. I suggest the vmi.dll export another funciton to give out
>> some "static" property of the java vm implementation that is no
>> relevent to a live vm.
> 
> What are you concerned about wasting?  It will take longer for sure, but
>  'java -version' doesn't need to be super fast (it prints to the console
> and quits).  In addition, we should consider gathering version
> information from the class library code too, i.e. to show each module
> version.  I don't think it warrants extending the VMI.

Yes - as Tim noted, we probably don't care if typing "java -version" is 
slow (unless some bonehead puts that into a SPEC benchmark...) because 
the user isn't trying to accomplish anything useful.

geir

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