Package org.apache.druid.query

Class FluentQueryRunner<T>

java.lang.Object

org.apache.druid.query.FluentQueryRunner<T>

All Implemented Interfaces:

QueryRunner<T>

public class FluentQueryRunner<T>
extends Object
implements QueryRunner<T>

Constructor Summary

Constructors

Constructor	Description
FluentQueryRunner(QueryRunner<T> runner, QueryToolChest<T,Query<T>> toolChest)

Method Summary

Modifier and Type	Method	Description
FluentQueryRunner<T>	applyPostMergeDecoration()
FluentQueryRunner<T>	applyPreMergeDecoration()
static <K,J extends Query<K>> FluentQueryRunner<K>	create(QueryRunner<K> runner, QueryToolChest<K,J> toolchest)
FluentQueryRunner<T>	emitCPUTimeMetric(ServiceEmitter emitter)
FluentQueryRunner<T>	emitCPUTimeMetric(ServiceEmitter emitter, AtomicLong accumulator)
FluentQueryRunner<T>	from(QueryRunner<T> runner)
FluentQueryRunner<T>	map(Function<QueryRunner<T>,QueryRunner<T>> mapFn)
FluentQueryRunner<T>	mergeResults()
FluentQueryRunner<T>	postProcess(PostProcessingOperator<T> postProcessing)
Sequence<T>	run(QueryPlus<T> queryPlus, ResponseContext responseContext)	Runs the given query and returns results in a time-ordered sequence.
QueryRunner<T>	setToString(String toStringValue)	Sets the toString of the QueryRunner.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.query.QueryRunner

run

Constructor Detail

FluentQueryRunner

public FluentQueryRunner(QueryRunner<T> runner,
                         QueryToolChest<T,Query<T>> toolChest)

Method Detail

create

public static <K,J extends Query<K>> FluentQueryRunner<K> create(QueryRunner<K> runner,
                                                                       QueryToolChest<K,J> toolchest)

run

public Sequence<T> run(QueryPlus<T> queryPlus,
                       ResponseContext responseContext)

Description copied from interface: QueryRunner

Runs the given query and returns results in a time-ordered sequence.

Specified by:

run in interface QueryRunner<T>

from

public FluentQueryRunner<T> from(QueryRunner<T> runner)

applyPostMergeDecoration

public FluentQueryRunner<T> applyPostMergeDecoration()

applyPreMergeDecoration

public FluentQueryRunner<T> applyPreMergeDecoration()

emitCPUTimeMetric

public FluentQueryRunner<T> emitCPUTimeMetric(ServiceEmitter emitter)

emitCPUTimeMetric

public FluentQueryRunner<T> emitCPUTimeMetric(ServiceEmitter emitter,
                                              AtomicLong accumulator)

postProcess

public FluentQueryRunner<T> postProcess(PostProcessingOperator<T> postProcessing)

mergeResults

public FluentQueryRunner<T> mergeResults()

map

public FluentQueryRunner<T> map(Function<QueryRunner<T>,QueryRunner<T>> mapFn)

setToString

public QueryRunner<T> setToString(String toStringValue)

Sets the toString of the QueryRunner. This is used because QueryRunner objects are often used as parameters for tests and the toString() value of the QueryRunners are used for the name of the test. This method doesn't return a FluentQueryRunner because it breaks the fluency.

Parameters:

toStringValue - the value that the resulting QueryRunner should return from its toString method.

Returns:

a QueryRunner that will return toStringValue from its toString method