Package io.trino.execution.scheduler

Class MultiSourcePartitionedScheduler

java.lang.Object

io.trino.execution.scheduler.MultiSourcePartitionedScheduler

All Implemented Interfaces:

StageScheduler, Closeable, AutoCloseable

@NotThreadSafe
public class MultiSourcePartitionedScheduler
extends Object
implements StageScheduler

Constructor Summary

Constructors

Constructor	Description
MultiSourcePartitionedScheduler(StageExecution stageExecution, Map<PlanNodeId,SplitSource> splitSources, SplitPlacementPolicy splitPlacementPolicy, int splitBatchSize, DynamicFilterService dynamicFilterService, TableExecuteContextManager tableExecuteContextManager, BooleanSupplier anySourceTaskBlocked)

Method Summary

Modifier and Type	Method	Description
void	close()
ScheduleResult	schedule()	Schedules as much work as possible without blocking.
void	start()	Called by the query scheduler when the scheduling process begins.

Methods inherited from class java.lang.Object

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

Constructor Details

MultiSourcePartitionedScheduler

public MultiSourcePartitionedScheduler(StageExecution stageExecution,
 Map<PlanNodeId,SplitSource> splitSources,
 SplitPlacementPolicy splitPlacementPolicy,
 int splitBatchSize,
 DynamicFilterService dynamicFilterService,
 TableExecuteContextManager tableExecuteContextManager,
 BooleanSupplier anySourceTaskBlocked)

Method Details

start

public void start()

Description copied from interface: StageScheduler

Called by the query scheduler when the scheduling process begins. This method is called before the ExecutionSchedule takes a decision to schedule a stage but after the query scheduling has been fully initialized. Within this method the scheduler may decide to schedule tasks that are necessary for query execution to make progress. For example the scheduler may decide to schedule a task without assigning any splits to unblock dynamic filter collection.

Specified by:

start in interface StageScheduler

schedule

public ScheduleResult schedule()

Description copied from interface: StageScheduler

Schedules as much work as possible without blocking. The schedule results is a hint to the query scheduler if and when the stage scheduler should be invoked again. It is important to note that this is only a hint and the query scheduler may call the schedule method at any time.

Specified by:

schedule in interface StageScheduler

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface StageScheduler