-Re: Passing command line arguments
praveenesh kumar 2013-12-06, 16:55
On Fri, Dec 6, 2013 at 4:36 PM, Serega Sheypak <[EMAIL PROTECTED]>wrote:
> Mapred. Child.Java.opts
> 06.12.2013 20:32 пользователь "praveenesh kumar" <[EMAIL PROTECTED]>
> > Hi all,
> > I am using my custom build class and my UDF is acting as wrapper.
> > I need to pass the command line argument to my UDF, which can be passed
> > down to the actual class that needs it.
> > One way would be to use the standard command line passing method and pass
> > the parameter via constructors down to the class which needs it. But that
> > doesn't seems to be the right way to me as it requires too much of code
> > changes, I want to keep my UDF as a separate entity.
> > Other way (which I am using) is defining the external parameter as system
> > variable and calling System.getenv( ), get that parameter, which is also
> > not that ideal as it requires hard-coding the variable on all hadoop
> > What I am trying to look, something which I can pass via something like
> > -D<my parameter=value> and use System.getProperty( ) method to get that
> > parameter.
> > But I am not able to find the property. I was wondering is there a way I
> > can use some other method or alternative to pass the command line
> > using Pig -D method or how pig UDFs are called behind the scenes so that
> > can think of some other alternative.
> > Regards
> > Praveenesh