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From "Eli Reisman (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-253) Create printf/pretty-printer style output format
Date Sat, 14 Jul 2012 23:24:35 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414540#comment-13414540
] 

Eli Reisman commented on GIRAPH-253:
------------------------------------

What about a PrintfOutputFormat which is specified at the command line like all the others,
using the -of switch, and expecting to pick up a -D option from the command line whenever
it is used that could be specified in GiraphJob with the other Configuration constants? then
you could do

bin/giraph ... -Dgiraph.printf="my vertex id is %ID and value is %VALUE" ... -of PrintfOutputFormat
...

this way if you get lazy and forget to remove the -D from your command line (or want to go
from testing output to real output and back and forth between runs quickly) the -D part only
gets picked up in the application if you specified -of as PrintfOutputFormat otherwise is
ignored harmlessly.

                
> Create printf/pretty-printer style output format
> ------------------------------------------------
>
>                 Key: GIRAPH-253
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-253
>             Project: Giraph
>          Issue Type: Bug
>            Reporter: Jakob Homan
>
> It would be nice to have an outputformat where the user could specify (from the command-line
in bin/giraph) the output of each vertex.  Something like:
> {noformat}--pretty-print="Hello, my name is %id and my value is %value. I have %edges.count
edges"{noformat}
> This would result in text files, each line of which would correspond to a vertex.
> This would make it very easy for people to spit out different output formats without
having to actually write any code...
> Bonus points: only print the line if some predicate holds true --pretty-print-if="edges.count>10"

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