cascading.flow.hadoop.stream
Class HadoopGroupGate
java.lang.Object
cascading.flow.stream.Duct<Incoming,Outgoing>
cascading.flow.stream.Gate<TupleEntry,Grouping<TupleEntry,TupleEntryIterator>>
cascading.flow.stream.SpliceGate
cascading.flow.hadoop.stream.HadoopGroupGate
- All Implemented Interfaces:
- Collapsing, ElementDuct
- Direct Known Subclasses:
- HadoopCoGroupGate, HadoopGroupByGate
public abstract class HadoopGroupGate
- extends SpliceGate
Fields inherited from class cascading.flow.stream.SpliceGate |
flowProcess, grouping, incomingScopes, keyBuilder, keyEntry, keyFields, orderedPrevious, outgoingScopes, role, sortBuilder, sortFields, splice, tupleEntryIterator, valuesBuilder, valuesFields |
Fields inherited from class cascading.flow.stream.Duct |
next |
Methods inherited from class cascading.flow.stream.SpliceGate |
addIncomingScope, addOutgoingScope, cleanup, createDefaultNarrowBuilder, createNarrowBuilder, createNulledBuilder, equals, getBranchNames, getFlowElement, getIncomingScopes, getOutgoingScopes, handleException, handleReThrowableException, hashCode, hasTrapHandler, initialize, makePosMap, orderDucts, setBranchNames, setTrapHandler, toString |
closure
protected HadoopGroupByClosure closure
collector
protected OutputCollector collector
HadoopGroupGate
public HadoopGroupGate(FlowProcess flowProcess,
Splice splice,
SpliceGate.Role role)
bind
public void bind(StreamGraph streamGraph)
- Overrides:
bind
in class Gate<TupleEntry,Grouping<TupleEntry,TupleEntryIterator>>
prepare
public void prepare()
- Overrides:
prepare
in class Duct<TupleEntry,Grouping<TupleEntry,TupleEntryIterator>>
start
public void start(Duct previous)
- Overrides:
start
in class Duct<TupleEntry,Grouping<TupleEntry,TupleEntryIterator>>
complete
public void complete(Duct previous)
- Overrides:
complete
in class Duct<TupleEntry,Grouping<TupleEntry,TupleEntryIterator>>
run
public void run(Tuple key,
Iterator values)
unwrapGrouping
protected abstract Tuple unwrapGrouping(Tuple key)
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