org.apache.ignite.internal.processors.cache.persistence.metastorage.pendingtask

Interface DurableBackgroundTask

All Superinterfaces:

Serializable

public interface DurableBackgroundTask
extends Serializable

Durable task that should be used to do long operations (e.g. index deletion) in background for cases when node with persistence can fail before operation is completed. After start, node reads it's pending background tasks from metastorage and completes them.

Method Summary

Modifier and Type	Method and Description
void	complete() Method that marks task as complete.
void	execute(GridKernalContext ctx) Method that executes the task.
boolean	isCompleted() Method that return completion flag.
void	onCancel() Callback for task cancellation.
String	shortName() Short unique name of the task is used to build metastorage key for saving this task and for logging.

Method Detail

shortName

String shortName()

Short unique name of the task is used to build metastorage key for saving this task and for logging.

Returns:

Short name of this task.

execute

void execute(GridKernalContext ctx)

Method that executes the task. It is called after node start.

Parameters:

ctx - Grid kernal context.

complete

void complete()

Method that marks task as complete.

isCompleted

boolean isCompleted()

Method that return completion flag.

Returns:

flag that task completed.

onCancel

void onCancel()

Callback for task cancellation.