apache spark - Calling pipe() from a PairRDD and passing a Java Object to it -


i have pairrdd javapairrdd<string, graph> graph java object created using

pairfunction<row, string, graph> pairfunction = new pairfunction<row, string, graph>() {         private static final long serialversionuid = 1l;          public tuple2<string, graph> call(row row) throws exception {                 integer parameter = row.getas("foo");                 string otherparameter = row.getas("bar");                 graph graph = new graph( parameter, otherparameter );                  string key = somekeygenerator();                 return new tuple2<string, graph>( key, graph );         }  };

now need run external program using mypairrdd.pipe('external.sh') think spark pass graph object external.sh via stdin.

i need access graph.parameter , graph.otherparameter inside external.sh.

how manage situation?

found !!

just need override tostring() method of pojo (graph) expose desirable attributes !!!

in case:

@override public string tostring() {     return this.parameter + "," + this.otherparameter; }

now output is:

(62,foo,bar)


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