@InterfaceAudience.LimitedPrivate(value="MapReduce") @InterfaceStability.Unstable public abstract static class Task.CombinerRunner<K,V> extends 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 IOException, InterruptedException, ClassNotFoundException
iterator
- the key/value pairs to use as inputcollector
- the output collectorIOException
InterruptedException
ClassNotFoundException
public static <K,V> Task.CombinerRunner<K,V> create(JobConf job, TaskAttemptID taskId, Counters.Counter inputCounter, Task.TaskReporter reporter, OutputCommitter committer) throws ClassNotFoundException
ClassNotFoundException
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