datafu.hourglass.mapreduce
Class DelegatingReducer
java.lang.Object
org.apache.hadoop.mapreduce.Reducer<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
datafu.hourglass.mapreduce.DelegatingReducer
public class DelegatingReducer
- extends org.apache.hadoop.mapreduce.Reducer<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
A Hadoop reducer which delegates to an implementation read from the distributed cache.
- Author:
- "Matthew Hayes"
Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer |
org.apache.hadoop.mapreduce.Reducer.Context |
Method Summary |
protected void |
cleanup(org.apache.hadoop.mapreduce.Reducer.Context context)
|
protected void |
reduce(java.lang.Object key,
java.lang.Iterable<java.lang.Object> values,
org.apache.hadoop.mapreduce.Reducer.Context context)
|
protected void |
setup(org.apache.hadoop.mapreduce.Reducer.Context context)
|
Methods inherited from class org.apache.hadoop.mapreduce.Reducer |
run |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
DelegatingReducer
public DelegatingReducer()
setup
protected void setup(org.apache.hadoop.mapreduce.Reducer.Context context)
throws java.io.IOException,
java.lang.InterruptedException
- Overrides:
setup
in class org.apache.hadoop.mapreduce.Reducer<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
- Throws:
java.io.IOException
java.lang.InterruptedException
reduce
protected void reduce(java.lang.Object key,
java.lang.Iterable<java.lang.Object> values,
org.apache.hadoop.mapreduce.Reducer.Context context)
throws java.io.IOException,
java.lang.InterruptedException
- Overrides:
reduce
in class org.apache.hadoop.mapreduce.Reducer<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
- Throws:
java.io.IOException
java.lang.InterruptedException
cleanup
protected void cleanup(org.apache.hadoop.mapreduce.Reducer.Context context)
throws java.io.IOException,
java.lang.InterruptedException
- Overrides:
cleanup
in class org.apache.hadoop.mapreduce.Reducer<java.lang.Object,java.lang.Object,java.lang.Object,java.lang.Object>
- Throws:
java.io.IOException
java.lang.InterruptedException
Matthew Hayes