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From: Harsh J <harsh@cloudera.com>
Date: Sat, 3 Aug 2013 17:50:11 +0530
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 <CAOcnVr1c_zNt+B8aA6-NwRsO+sE==dBnWHEbWa-=9qz2rxhzAA@mail.gmail.com>
Subject: Re: load properties from property file into Configuration object
To: "<user@hadoop.apache.org>" <user@hadoop.apache.org>
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This is a bit unnecessary to manually do. If you use the Tool
framework, then you can pass -Dkey=val props directly into a config
object at runtime. See
http://hadoop.apache.org/docs/stable/api/org/apache/hadoop/util/Tool.html
and http://hadoop.apache.org/docs/stable/api/org/apache/hadoop/util/GenericOptionsParser.html

On Sat, Aug 3, 2013 at 5:30 PM, Juan Pino <juancitomiguelito@gmail.com> wrote:
> Hi,
>
> I am trying to simplify code that loads properties from a property file into
> a Configuration object:
>
> Short excerpt of the code:
>
> String configFile = args[0];
> Properties p = new Properties();
> p.load(new FileInputStream(configFile));
> Configuration conf = getConf();
> for (String prop: p.stringPropertyNames()) {
>   conf.set(prop, p.getProperty(prop));
> }
>
> The context is that my program can be run with an optional argument which is
> a config file as "hadoop jar MYJAR MYCLASS -D property1=PROPERTY1 -D
> property2=PROPERTY2 [MYCONFIGFILE]"
> The format of MYCONFIGFILE is
> "property3=PROPERTY3<NEWLINE>property4=PROPERTY4 etc."
>
> Looking at the Configuration api, I didn't see any method that directly
> loads properties from a property file.
> Looking at the Configuration code, Configuration looks like a wrapper around
> Properties, so I thought there was a similar method to Properties.load or a
> method that sets several properties at the same time.
> Is there a way to do this ?
>
> Thanks very much,
>
> Juan
>
> --
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-- 
Harsh J