io.druid.query.groupby.strategy

Class GroupByStrategyV2

java.lang.Object

io.druid.query.groupby.strategy.GroupByStrategyV2

All Implemented Interfaces:

GroupByStrategy

public class GroupByStrategyV2
extends Object
implements GroupByStrategy

Field Summary

Fields

Modifier and Type	Field and Description
static String	CTX_KEY_FUDGE_TIMESTAMP

Constructor Summary

Constructors

Constructor and Description
GroupByStrategyV2(DruidProcessingConfig processingConfig, com.google.common.base.Supplier<GroupByQueryConfig> configSupplier, StupidPool<ByteBuffer> bufferPool, BlockingPool<ByteBuffer> mergeBufferPool, com.fasterxml.jackson.databind.ObjectMapper spillMapper, QueryWatcher queryWatcher)

Method Summary

Modifier and Type	Method and Description
static org.joda.time.DateTime	getUniversalTimestamp(GroupByQuery query) If "query" has a single universal timestamp, return it.
com.metamx.common.guava.Sequence<io.druid.data.input.Row>	mergeResults(QueryRunner<io.druid.data.input.Row> baseRunner, GroupByQuery query, Map<String,Object> responseContext)
QueryRunner<io.druid.data.input.Row>	mergeRunners(com.google.common.util.concurrent.ListeningExecutorService exec, Iterable<QueryRunner<io.druid.data.input.Row>> queryRunners)
com.metamx.common.guava.Sequence<io.druid.data.input.Row>	process(GroupByQuery query, StorageAdapter storageAdapter)
com.metamx.common.guava.Sequence<io.druid.data.input.Row>	processSubqueryResult(GroupByQuery subquery, GroupByQuery query, com.metamx.common.guava.Sequence<io.druid.data.input.Row> subqueryResult)

Methods inherited from class java.lang.Object

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

Field Detail

CTX_KEY_FUDGE_TIMESTAMP

public static final String CTX_KEY_FUDGE_TIMESTAMP

See Also:

Constant Field Values

Constructor Detail

GroupByStrategyV2

@Inject
public GroupByStrategyV2(DruidProcessingConfig processingConfig,
                                 com.google.common.base.Supplier<GroupByQueryConfig> configSupplier,
                                 StupidPool<ByteBuffer> bufferPool,
                                 BlockingPool<ByteBuffer> mergeBufferPool,
                                 com.fasterxml.jackson.databind.ObjectMapper spillMapper,
                                 QueryWatcher queryWatcher)

Method Detail

getUniversalTimestamp

public static org.joda.time.DateTime getUniversalTimestamp(GroupByQuery query)

If "query" has a single universal timestamp, return it. Otherwise return null. This is useful for keeping timestamps in sync across partial queries that may have different intervals.

Parameters:

query - the query

Returns:

universal timestamp, or null

mergeResults

public com.metamx.common.guava.Sequence<io.druid.data.input.Row> mergeResults(QueryRunner<io.druid.data.input.Row> baseRunner,
                                                                              GroupByQuery query,
                                                                              Map<String,Object> responseContext)

Specified by:

mergeResults in interface GroupByStrategy

processSubqueryResult

public com.metamx.common.guava.Sequence<io.druid.data.input.Row> processSubqueryResult(GroupByQuery subquery,
                                                                                       GroupByQuery query,
                                                                                       com.metamx.common.guava.Sequence<io.druid.data.input.Row> subqueryResult)

Specified by:

processSubqueryResult in interface GroupByStrategy

mergeRunners

public QueryRunner<io.druid.data.input.Row> mergeRunners(com.google.common.util.concurrent.ListeningExecutorService exec,
                                                         Iterable<QueryRunner<io.druid.data.input.Row>> queryRunners)

Specified by:

mergeRunners in interface GroupByStrategy

process

public com.metamx.common.guava.Sequence<io.druid.data.input.Row> process(GroupByQuery query,
                                                                         StorageAdapter storageAdapter)

Specified by:

process in interface GroupByStrategy