org.apache.ignite.internal.processors.query.stat

Class IgniteStatisticsHelper

java.lang.Object

org.apache.ignite.internal.processors.query.stat.IgniteStatisticsHelper

public class IgniteStatisticsHelper
extends Object

Utility methods to statistics messages generation.

Constructor Summary

Constructors

Constructor and Description
IgniteStatisticsHelper(UUID locNodeId, SchemaManager schemaMgr, Function<Class<?>,IgniteLogger> logSupplier) Constructor.

Method Summary

Modifier and Type	Method and Description
static ObjectStatisticsImpl	aggregateLocalStatistics(GridH2Table tbl, StatisticsObjectConfiguration cfg, Collection<? extends ObjectStatisticsImpl> stats, IgniteLogger log) Aggregate partition level statistics to local level one or local statistics to global one.
ObjectStatisticsImpl	aggregateLocalStatistics(StatisticsObjectConfiguration cfg, Collection<? extends ObjectStatisticsImpl> stats) Aggregate specified partition level statistics to local level statistics.
static StatisticsObjectConfiguration[]	buildDefaultConfigurations(StatisticsTarget... targets) Build object configurations array with all default parameters from specified targets.
static long	calculateRowCount(StatisticsObjectConfiguration cfg, long actualRowCount) Calculate effective row count.
static org.gridgain.internal.h2.table.Column[]	filterColumns(org.gridgain.internal.h2.table.Column[] cols, @Nullable Collection<String> colNames) Filter columns by specified names.

Methods inherited from class java.lang.Object

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

Constructor Detail

IgniteStatisticsHelper

public IgniteStatisticsHelper(UUID locNodeId,
                              SchemaManager schemaMgr,
                              Function<Class<?>,IgniteLogger> logSupplier)

Constructor.

Parameters:

locNodeId - Local node id.

schemaMgr - Schema manager.

logSupplier - Ignite logger supplier to get logger from.

Method Detail

aggregateLocalStatistics

public ObjectStatisticsImpl aggregateLocalStatistics(StatisticsObjectConfiguration cfg,
                                                     Collection<? extends ObjectStatisticsImpl> stats)

Aggregate specified partition level statistics to local level statistics.

Parameters:

cfg - Statistics object configuration.

stats - Collection of all local partition level or local level statistics by specified key to aggregate.

Returns:

Local level aggregated statistics.

aggregateLocalStatistics

public static ObjectStatisticsImpl aggregateLocalStatistics(GridH2Table tbl,
                                                            StatisticsObjectConfiguration cfg,
                                                            Collection<? extends ObjectStatisticsImpl> stats,
                                                            IgniteLogger log)

Aggregate partition level statistics to local level one or local statistics to global one.

Parameters:

tbl - Table to aggregate statistics by.

cfg - Statistics object configuration.

stats - Collection of partition level or local level statistics to aggregate.

log - Logger.

Returns:

Local level statistics.

calculateRowCount

public static long calculateRowCount(StatisticsObjectConfiguration cfg,
                                     long actualRowCount)

Calculate effective row count. If there are some overrides in statistics configuration - maximum value will be choosen. If not - will return actualRowCount.

Parameters:

cfg - Statistics configuration to dig overrides row count from.

actualRowCount - Actual row count.

Returns:

Effective row count.

buildDefaultConfigurations

public static StatisticsObjectConfiguration[] buildDefaultConfigurations(StatisticsTarget... targets)

Build object configurations array with all default parameters from specified targets.

Parameters:

targets - Targets to build configurations from.

Returns:

StatisticsObjectConfiguration array.

filterColumns

public static org.gridgain.internal.h2.table.Column[] filterColumns(org.gridgain.internal.h2.table.Column[] cols,
                                                                    @Nullable
                                                                    @Nullable Collection<String> colNames)

Filter columns by specified names.

Parameters:

cols - Columns to filter.

colNames - Column names.

Returns:

Column with specified names.