setMapOutputKeyClass() and setMapOutputValueClass() are standard Map/Reduce functionality. If the Mapper you use/have created has different output types than its input types then you need to set these on your Jobs Configuration object. Same applies should your Reducer have different output types than its input types.
The filter configuration is also set on the Job Configuration e.g. job.getConfiguration().set(RdfMapReduceConstants.FILTER_SUBJECT_URIS, "http://example.org/instance,http://example.org/anotherInstance";); The documentation has been updated to show examples of this Rob On 17/02/2015 09:18, "Carmen Manzulli" <[email protected]> wrote: >Hi, >i have a question about jena elephas and in particular about how to >execute >TripleFilterBySubjectUriMapper.class; for now I've created a project with >jena elephas dependencies and i'm implementing the main class with all >configuration options; my doubts are about MapOutputkeyclass and >MapOutputValue class and also how to set >rdf.mapreduce.filter.subject.uris. is this last one a command >parameter?if >yes, i should write a command like: > >bin/hadoop jar <path to my jar>file.jar mypackage --output <path output> >--input-type triples <path input> rdf.mapreduce.filter.subject.uris uri1 >uri2 ...etc > >is it right? > >thanks in advance, >Carmen
