water.rapids.ast.prims.mungers

Class AstRankWithinGroupBy.SortnGrouby

java.lang.Object

jsr166y.ForkJoinTask<java.lang.Void>

jsr166y.CountedCompleter

water.H2O.H2OCountedCompleter<T>

water.DTask<T>

water.MRTask<AstRankWithinGroupBy.SortnGrouby>

water.rapids.ast.prims.mungers.AstRankWithinGroupBy.SortnGrouby

All Implemented Interfaces:

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

Enclosing class:

AstRankWithinGroupBy

public class AstRankWithinGroupBy.SortnGrouby
extends MRTask<AstRankWithinGroupBy.SortnGrouby>

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

Method Summary

Modifier and Type	Method and Description
void	copyGroupInfo(AstRankWithinGroupBy.GInfoPC[] currentChunk, AstRankWithinGroupBy.GInfoPC[] otherChunk)
void	map(Chunk[] chunks) I will first go from row 0 towards end of chunk to collect info on first group of the chunk.
void	postGlobal()
void	reduce(AstRankWithinGroupBy.SortnGrouby git) Override to combine results from 'mrt' into 'this' MRTask.

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, setupLocal, 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

Method Detail

map

public void map(Chunk[] chunks)

I will first go from row 0 towards end of chunk to collect info on first group of the chunk. Next, I will go from bottom of chunk towards 0 to collect info on last group of the chunk. It is possible that this chunk may contain only one chunk. That is okay. In this case, chunkFirstG and chunkLastG will contain the same information.

Overrides:

map in class MRTask<AstRankWithinGroupBy.SortnGrouby>

reduce

public void reduce(AstRankWithinGroupBy.SortnGrouby git)

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<AstRankWithinGroupBy.SortnGrouby>

copyGroupInfo

public void copyGroupInfo(AstRankWithinGroupBy.GInfoPC[] currentChunk,
                          AstRankWithinGroupBy.GInfoPC[] otherChunk)

postGlobal

public void postGlobal()

Overrides:

postGlobal in class MRTask<AstRankWithinGroupBy.SortnGrouby>