Package io.trino.execution.executor.scheduler

Class SchedulerContext

java.lang.Object

io.trino.execution.executor.scheduler.SchedulerContext

@NotThreadSafe
public final class SchedulerContext
extends Object

Constructor Summary

Constructors

Constructor	Description
SchedulerContext(FairScheduler scheduler, io.trino.execution.executor.scheduler.TaskControl handle)

Method Summary

Modifier and Type	Method	Description
boolean	block(com.google.common.util.concurrent.ListenableFuture<?> future)	Indicate that the current task is blocked.
long	getBlockedNanos()
long	getScheduledNanos()
long	getStartNanos()
long	getWaitNanos()
boolean	maybeYield()	Attempt to relinquish control to let other tasks run.

Methods inherited from class java.lang.Object

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

Constructor Details

SchedulerContext

public SchedulerContext(FairScheduler scheduler,
 io.trino.execution.executor.scheduler.TaskControl handle)

Method Details

maybeYield

public boolean maybeYield()

Attempt to relinquish control to let other tasks run.

Returns:

false if the task was interrupted or cancelled while yielding, for example if the Java thread was interrupted, the scheduler was shutdown, or the scheduling group was removed. The caller is expected to clean up and finish.

block

public boolean block(com.google.common.util.concurrent.ListenableFuture<?> future)

Indicate that the current task is blocked. The method returns when the future completes of it the task is interrupted.

Returns:

false if the task was interrupted or cancelled while blocked, for example if the Java thread was interrupted, the scheduler was shutdown, or the scheduling group was removed. The caller is expected to clean up and finish.

getStartNanos

public long getStartNanos()

getWaitNanos

public long getWaitNanos()

getScheduledNanos

public long getScheduledNanos()

getBlockedNanos

public long getBlockedNanos()