public class JrubyAccumulatorEvalFunc extends AccumulatorEvalFunc<Object>
EvalFunc.SchemaTypelog, pigLogger, reporter, returnType| Constructor and Description |
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JrubyAccumulatorEvalFunc(String path,
String methodName)
This constructor is used by JrubyScriptEngine to register a Ruby class as an Accumulator.
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| Modifier and Type | Method and Description |
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void |
accumulate(Tuple b)
This uses the "exec" method required of AccumulatorPigUdf Ruby classes.
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void |
cleanup()
Called after getValue() to prepare processing for next key.
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Object |
getValue()
This method calls "get" on the AccumulatorPigUdf Ruby class that was specified.
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Schema |
outputSchema(Schema input)
This provides the Schema of the output, and leverages the get_output_schema function on the class object
that is defined on the ruby side.
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execallowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warnpublic void accumulate(Tuple b) throws IOException
accumulate in interface Accumulator<Object>accumulate in class AccumulatorEvalFunc<Object>b - A tuple containing a single field, which is a bag. The bag will contain the set
of tuples being passed to the UDF in this iteration.IOExceptionpublic void cleanup()
Accumulatorcleanup in interface Accumulator<Object>cleanup in class AccumulatorEvalFunc<Object>public Object getValue()
getValue in interface Accumulator<Object>getValue in class AccumulatorEvalFunc<Object>public Schema outputSchema(Schema input)
outputSchema in class EvalFunc<Object>input - Schema of the inputCopyright © 2007-2017 The Apache Software Foundation