water.util

Class VecUtils.CollectDomainFast

java.lang.Object

jsr166y.ForkJoinTask<java.lang.Void>

jsr166y.CountedCompleter

water.H2O.H2OCountedCompleter<T>

water.DTask<T>

water.MRTask<VecUtils.CollectDomainFast>

water.util.VecUtils.CollectDomainFast

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.concurrent.Future<java.lang.Void>, ForkJoinPool.ManagedBlocker, Freezable<VecUtils.CollectDomainFast>

Enclosing class:

VecUtils

public static class VecUtils.CollectDomainFast
extends MRTask<VecUtils.CollectDomainFast>

(Optimized for positive ints) Collect numeric domain of given Vec A map-reduce task to collect up the unique values of an integer Vec and returned as the domain for the Vec.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class water.MRTask

MRTask.PostMapAction<T extends MRTask.PostMapAction<T>>

Nested classes/interfaces inherited from class water.DTask

DTask.DKeyTask<T extends DTask.DKeyTask,V extends Keyed>, DTask.RemoveCall

Field Summary

Fields inherited from class water.MRTask

_appendables, _fr, _fs, _hi, _keys, _left, _lo, _nhi, _nleft, _nlo, _nrite, _rite, _run_local, _topLocal

Fields inherited from class water.DTask

_ex

Constructor Summary

Constructors

Constructor and Description
CollectDomainFast(int s)

Method Summary

Modifier and Type	Method and Description
long[]	domain() Returns exact numeric domain of given Vec computed by this task.
void	map(Chunk ys) Override with your map implementation.
protected void	postGlobal()
void	reduce(VecUtils.CollectDomainFast mrt) Override to combine results from 'mrt' into 'this' MRTask.
protected void	setupLocal() Override to do any remote initialization on the 1st remote instance of this object, for initializing node-local shared data structures.

Methods inherited from class water.MRTask

appendables, asyncExecOnAllNodes, block, closeLocal, compute2, dfork, dfork, dfork, dfork, dfork, dinvoke, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAll, doAllNodes, getResult, getResult, isReleasable, map, map, map, map, map, map, map, map, map, map, map, modifiesVolatileVecs, onCompletion, onExceptionalCompletion, outputFrame, outputFrame, outputFrame, profile, profString, self, withPostMapAction

Methods inherited from class water.DTask

copyOver, getDException, hasException, logVerbose, onAck, onAckAck, setException

Methods inherited from class water.H2O.H2OCountedCompleter

asBytes, clone, compute, compute1, currThrPriority, frozenType, icer, priority, read, readJSON, reloadFromBytes, write, writeJSON

Methods inherited from class jsr166y.CountedCompleter

__tryComplete, 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, 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

Constructor Detail

CollectDomainFast

public CollectDomainFast(int s)

Method Detail

setupLocal

protected void setupLocal()

Description copied from class: MRTask

Override to do any remote initialization on the 1st remote instance of this object, for initializing node-local shared data structures.

Overrides:

setupLocal in class MRTask<VecUtils.CollectDomainFast>

map

public void map(Chunk ys)

Description copied from class: MRTask

Override with your map implementation. This overload is given a single local input Chunk. It is meant for map/reduce jobs that use a single column in a input Frame. All map variants are called, but only one is expected to be overridden.

Overrides:

map in class MRTask<VecUtils.CollectDomainFast>

reduce

public void reduce(VecUtils.CollectDomainFast mrt)

Description copied from class: MRTask

Override to combine results from 'mrt' into 'this' MRTask. Both 'this' and 'mrt' are guaranteed to either have map() run on them, or be the results of a prior reduce(). Reduce is optional if, e.g., the result is some output vector.

Overrides:

reduce in class MRTask<VecUtils.CollectDomainFast>

postGlobal

protected void postGlobal()

Overrides:

postGlobal in class MRTask<VecUtils.CollectDomainFast>

domain

public long[] domain()

Returns exact numeric domain of given Vec computed by this task. The domain is always sorted. Hence: domain()[0] - minimal domain value domain()[domain().length-1] - maximal domain value