Package mondrian.rolap

Class BatchLoader

java.lang.Object

mondrian.rolap.BatchLoader

class BatchLoader
extends Object

Context for processing a request to the cache manager for segments matching a collection of cell requests. All methods except the constructor are executed by the cache manager's dedicated thread.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	BatchLoader.Batch
(package private) static class	BatchLoader.CompositeBatch	Set of Batches which can grouped together.
static class	BatchLoader.LoadBatchCommand	Command that loads the segments required for a collection of cell requests.
(package private) static class	BatchLoader.LoadBatchResponse	Request sent from cache manager to a worker to load segments into the cache, create segments by rolling up, and to wait for segments being loaded via SQL.
static class	BatchLoader.RollupInfo

Constructor Summary

Constructors

Constructor	Description
BatchLoader(Locus locus, SegmentCacheManager cacheMgr, Dialect dialect, RolapCube cube)

Method Summary

Modifier and Type	Method	Description
(package private) static void	addToCompositeBatch(Map<AggregationKey,BatchLoader.CompositeBatch> batchGroups, BatchLoader.Batch detailedBatch, BatchLoader.Batch summaryBatch)
(package private) static List<BatchLoader.CompositeBatch>	groupBatches(List<BatchLoader.Batch> batchList)
(package private) BatchLoader.LoadBatchResponse	load(List<CellRequest> cellRequests)	Determines which segments need to be loaded from external cache, created using roll up, or created using SQL to satisfy a given list of cell requests.
(package private) boolean	shouldUseGroupingFunction()

Methods inherited from class java.lang.Object

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

Constructor Detail

BatchLoader

public BatchLoader(Locus locus,
                   SegmentCacheManager cacheMgr,
                   Dialect dialect,
                   RolapCube cube)

Method Detail

shouldUseGroupingFunction

final boolean shouldUseGroupingFunction()

load

BatchLoader.LoadBatchResponse load(List<CellRequest> cellRequests)

Determines which segments need to be loaded from external cache, created using roll up, or created using SQL to satisfy a given list of cell requests.

Returns:

List of segment futures. Each segment future may or may not be already present (it depends on the current location of the segment body). Each future will return a not-null segment (or throw).

groupBatches

static List<BatchLoader.CompositeBatch> groupBatches(List<BatchLoader.Batch> batchList)

addToCompositeBatch

static void addToCompositeBatch(Map<AggregationKey,BatchLoader.CompositeBatch> batchGroups,
                                BatchLoader.Batch detailedBatch,
                                BatchLoader.Batch summaryBatch)