|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object datafu.hourglass.mapreduce.ObjectProcessor datafu.hourglass.mapreduce.ObjectReducer datafu.hourglass.mapreduce.CollapsingReducer
public class CollapsingReducer
The reducer used by AbstractPartitionCollapsingIncrementalJob
and its derived classes.
An implementation of Accumulator
is used to perform aggregation and produce the
output value.
Field Summary | |
---|---|
protected long |
_beginTime
|
protected long |
_endTime
|
Constructor Summary | |
---|---|
CollapsingReducer()
|
Method Summary | |
---|---|
Accumulator<org.apache.avro.generic.GenericRecord,org.apache.avro.generic.GenericRecord> |
getNewAccumulator()
|
Accumulator<org.apache.avro.generic.GenericRecord,org.apache.avro.generic.GenericRecord> |
getOldAccumulator()
|
boolean |
getReuseOutput()
Gets whether previous output is being reused. |
void |
reduce(java.lang.Object keyObj,
java.lang.Iterable<java.lang.Object> values,
org.apache.hadoop.mapreduce.ReduceContext<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object> context)
|
void |
setAccumulator(Accumulator<org.apache.avro.generic.GenericRecord,org.apache.avro.generic.GenericRecord> acc)
|
void |
setOldRecordMerger(Merger<org.apache.avro.generic.GenericRecord> merger)
|
void |
setOutputDateRange(DateRange dateRange)
Sets the date range for the output. |
void |
setRecordMerger(Merger<org.apache.avro.generic.GenericRecord> merger)
|
void |
setReuseOutput(boolean reuseOutput)
Sets whether previous output is being reused. |
void |
setSchemas(PartitionCollapsingSchemas schemas)
Sets the Avro schemas. |
Methods inherited from class datafu.hourglass.mapreduce.ObjectProcessor |
---|
close, getContext, setContext |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
---|
protected long _beginTime
protected long _endTime
Constructor Detail |
---|
public CollapsingReducer()
Method Detail |
---|
public void reduce(java.lang.Object keyObj, java.lang.Iterable<java.lang.Object> values, org.apache.hadoop.mapreduce.ReduceContext<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object> context) throws java.io.IOException, java.lang.InterruptedException
reduce
in class ObjectReducer
java.io.IOException
java.lang.InterruptedException
public void setSchemas(PartitionCollapsingSchemas schemas)
schemas
- public boolean getReuseOutput()
public void setReuseOutput(boolean reuseOutput)
reuseOutput
- true if previous output is reusedpublic void setAccumulator(Accumulator<org.apache.avro.generic.GenericRecord,org.apache.avro.generic.GenericRecord> acc)
public Accumulator<org.apache.avro.generic.GenericRecord,org.apache.avro.generic.GenericRecord> getNewAccumulator()
public Accumulator<org.apache.avro.generic.GenericRecord,org.apache.avro.generic.GenericRecord> getOldAccumulator()
public void setRecordMerger(Merger<org.apache.avro.generic.GenericRecord> merger)
public void setOldRecordMerger(Merger<org.apache.avro.generic.GenericRecord> merger)
public void setOutputDateRange(DateRange dateRange)
DateRangeConfigurable
setOutputDateRange
in interface DateRangeConfigurable
dateRange
- output date range
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |