@InterfaceAudience.LimitedPrivate(value="MapReduce")
@InterfaceStability.Unstable
public abstract static class Task.CombinerRunner<K,V>
extends java.lang.Object
Modifier and Type | Field and Description |
---|---|
protected Counters.Counter |
inputCounter |
protected JobConf |
job |
protected Task.TaskReporter |
reporter |
Modifier and Type | Method and Description |
---|---|
abstract void |
combine(RawKeyValueIterator iterator,
OutputCollector<K,V> collector)
Run the combiner over a set of inputs.
|
static <K,V> Task.CombinerRunner<K,V> |
create(JobConf job,
TaskAttemptID taskId,
Counters.Counter inputCounter,
Task.TaskReporter reporter,
OutputCommitter committer) |
protected final Counters.Counter inputCounter
protected final JobConf job
protected final Task.TaskReporter reporter
public abstract void combine(RawKeyValueIterator iterator, OutputCollector<K,V> collector) throws java.io.IOException, java.lang.InterruptedException, java.lang.ClassNotFoundException
iterator
- the key/value pairs to use as inputcollector
- the output collectorjava.io.IOException
java.lang.InterruptedException
java.lang.ClassNotFoundException
public static <K,V> Task.CombinerRunner<K,V> create(JobConf job, TaskAttemptID taskId, Counters.Counter inputCounter, Task.TaskReporter reporter, OutputCommitter committer) throws java.lang.ClassNotFoundException
java.lang.ClassNotFoundException
Copyright © 2009 The Apache Software Foundation