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java.lang.Objectorg.apache.hadoop.mapred.lib.aggregate.ValueAggregatorJobBase<K1,V1>
public abstract class ValueAggregatorJobBase<K1 extends WritableComparable,V1 extends Writable>
This abstract class implements some common functionalities of the the generic mapper, reducer and combiner classes of Aggregate.
Field Summary | |
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protected java.util.ArrayList<ValueAggregatorDescriptor> |
aggregatorDescriptorList
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Constructor Summary | |
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ValueAggregatorJobBase()
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Method Summary | |
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void |
close()
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void |
configure(JobConf job)
Initializes a new instance from a JobConf . |
protected void |
logSpec()
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Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.hadoop.mapred.Mapper |
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map |
Methods inherited from interface org.apache.hadoop.mapred.Reducer |
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reduce |
Field Detail |
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protected java.util.ArrayList<ValueAggregatorDescriptor> aggregatorDescriptorList
Constructor Detail |
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public ValueAggregatorJobBase()
Method Detail |
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public void configure(JobConf job)
JobConfigurable
JobConf
.
configure
in interface JobConfigurable
job
- the configurationprotected void logSpec()
public void close() throws java.io.IOException
close
in interface java.io.Closeable
java.io.IOException
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