water.exec
Class Helpers.ScallarCollector

java.lang.Object
  jsr166y.ForkJoinTask<java.lang.Void>
      jsr166y.CountedCompleter
          water.H2O.H2OCountedCompleter
              water.DTask<T>
                  water.DRemoteTask<T>
                      water.MRTask
                          water.exec.Helpers.ScallarCollector

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.concurrent.Future<java.lang.Void>, Freezable

Enclosing class:

Helpers

public abstract static class Helpers.ScallarCollector
extends MRTask

See Also:

Serialized Form

Field Summary

int	_col
Key	_key
protected double	_result

Fields inherited from class water.MRTask

_hi, _lo

Fields inherited from class water.DRemoteTask

_fs, _is_local, _keys

Fields inherited from class water.DTask

_cls, _eFromNode, _exception, _fname, _lineNum, _msg, _mth

Constructor Summary

Helpers.ScallarCollector(Key key, int col, double initVal)

Method Summary

protected abstract void	collect(double x)
void	map(Key key) Run some useful function over this local key, and record the results in the this MRTask.
protected abstract void	reduce(double x)
void	reduce(DRemoteTask drt)
double	result()

Methods inherited from class water.MRTask

hi, init, lcompute, lo, lonCompletion, memOverheadPerChunk, onExceptionalCompletion

Methods inherited from class water.DRemoteTask

alsoBlockFor, alsoBlockFor, clone, compute2, dfork, getFutures, invoke, invokeOnAllNodes, keys, merge, merge, merge, onCompletion, reduceAlsoBlock

Methods inherited from class water.DTask

copyOver, dinvoke, frozenType, getDException, hasException, logVerbose, newInstance, onAck, onAckAck, read, setException, toDocField, write, writeJSONFields

Methods inherited from class water.H2O.H2OCountedCompleter

compute, priority

Methods inherited from class jsr166y.CountedCompleter

addToPendingCount, compareAndSetPendingCount, complete, exec, getCompleter, getPendingCount, getRawResult, setCompleter, setPendingCount, setRawResult, tryComplete

Methods inherited from class jsr166y.ForkJoinTask

adapt, adapt, adapt, cancel, compareAndSetForkJoinTaskTag, completeExceptionally, fork, get, get, getException, getForkJoinTaskTag, getPool, getQueuedTaskCount, getSurplusQueuedTaskCount, helpQuiesce, inForkJoinPool, invoke, invokeAll, invokeAll, invokeAll, isCancelled, isCompletedAbnormally, isCompletedNormally, isDone, join, peekNextLocalTask, pollNextLocalTask, pollTask, quietlyComplete, quietlyInvoke, quietlyJoin, reinitialize, setForkJoinTaskTag, tryUnfork

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

_key

public final Key _key

_col

public int _col

_result

protected double _result

Constructor Detail

Helpers.ScallarCollector

public Helpers.ScallarCollector(Key key,
                                int col,
                                double initVal)

Method Detail

collect

protected abstract void collect(double x)

reduce

protected abstract void reduce(double x)

result

public double result()

map

public void map(Key key)

Description copied from class: MRTask

Run some useful function over this local key, and record the results in the this MRTask.

Specified by:

map in class MRTask

reduce

public void reduce(DRemoteTask drt)

Specified by:

reduce in class DRemoteTask