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From Sebastian Kunert <skuner...@gmail.com>
Subject Re: ConstantFields in Java API
Date Wed, 25 Jun 2014 18:18:41 GMT
Hi,

@Fabian: Are you sure that is the case? I don't think that the annotations
are set correctly automatically at the moment. There is a pullrequest open,
but it was not yet merged.

Your UDF looks like field 1 of the first tuple input is also constant:
 @ConstantFieldsFirst("1->1;2 -> 2")
 @ConstantFieldsSecond("0 -> 0")

Regards,

Sebastian


2014-06-25 20:09 GMT+02:00 Fabian Hueske <fhueske@apache.org>:

> Hi Janani,
>
> You can also use the projection join as:
>
>
> ds1.join(ds2).where(0).equalTo(0).projectFirst(0).projectSecond(1,2).types(Long.class,
> Long.class, Long.class)
>
> That should also automatically set the correct annotations.
>
> Best, Fabian
> On Jun 25, 2014 7:41 PM, "Janani Chakkaradhari" <janani.cse05@gmail.com>
> wrote:
>
> > Hi,
> >
> > Can someone check the following UDF for constantFileds setup?
> >
> > In simple, I wanted to do :
> > First Input of Join :    Tuple3<Long, FMCounter, Double> first,
> > Second Input of Join: Tuple2<Long, Long> second
> > Output:                     Tuple3<second.f0, first.f1, first.f1>
> >
> >
> > UDF:
> >     @ConstantFieldsFirst("2 -> 2")
> >     @ConstantFieldsSecond("0 -> 0")
> >     public static final class SendingMessageToNeighbors
> >         extends
> >         JoinFunction<Tuple3<Long, FMCounter, Double>,
> >         Tuple2<Long, Long>, Tuple3<Long, FMCounter, Double>> {
> >
> >         @Override
> >         public Tuple3<Long, FMCounter, Double> join(
> >             Tuple3<Long, FMCounter, Double> vertex_workset,
> >             Tuple2<Long, Long> neighbors) throws Exception {
> >             return new Tuple3<Long,
> >                     FMCounter,
> > Double>(neighbors.f0,vertex_workset.f1,vertex_workset.f2);
> >         }
> >
> >     }
> >
> > Here, I only mapped for two fields (0 and 2) in output tuple. Is it fine?
> >
> > Regards,
> > Janani
> >
>

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