@Override
public void receive(Duct previous, final Grouping<TupleEntry, TupleEntryIterator> grouping) {
try {
// we want to null out any 'values' before and after the iterator begins/ends
// this allows buffers to emit tuples before next() and when hasNext() return false;
final TupleEntry tupleEntry = grouping.joinIterator.getTupleEntry();
incomingEntry = tupleEntry;
// if Fields.NONE are declared on the CoGroup, we don't provide arguments, only the
// joinerClosure
if (!tupleEntry.getFields().isNone()) {
final Tuple valueNulledTuple = Tuples.setOnEmpty(tupleEntry, grouping.key);
tupleEntry.setTuple(valueNulledTuple);
operationCall.setArgumentsIterator(
createArgumentsIterator(grouping, tupleEntry, valueNulledTuple));
}
operationCall.setOutputCollector(outputCollector);
operationCall.setJoinerClosure(grouping.joinerClosure);
operationCall.setGroup(grouping.key);
buffer.operate(flowProcess, operationCall);
} catch (CascadingException exception) {
handleException(exception, argumentsEntry);
} catch (Throwable throwable) {
handleException(
new OperatorException(
every,
"operator Every failed executing operation: " + every.getOperation(),
throwable),
argumentsEntry);
}
}
public void setTuple(Tuple tuple) {
if (getFields().size() != tuple.size()) {
throw new IllegalArgumentException("Size of tuple doesn't match current fields");
}
_tupleEntry.setTuple(tuple);
reset();
}