ai.grakn.engine.tasks.manager

Class StandaloneTaskManager

java.lang.Object

ai.grakn.engine.tasks.manager.StandaloneTaskManager

All Implemented Interfaces:

TaskManager, AutoCloseable

public class StandaloneTaskManager
extends Object
implements TaskManager

In-memory task manager to schedule and execute tasks. By default this task manager uses an in-memory state storage.

If engine fails while using this task manager, there will be no possibility for task recovery.

Author:

Denis Lobanov, alexandraorth

Constructor Summary

Constructors

Constructor and Description
StandaloneTaskManager(EngineID engineId)

Method Summary

Modifier and Type	Method and Description
void	addTask(TaskState taskState) Schedule a single shot/one off BackgroundTask to run after a @delay in milliseconds.
void	close()
TaskManager	open()
void	stopTask(TaskId id) Stop a Scheduled, Paused or Running task.
TaskStateStorage	storage() Return the StateStorage instance that is used by this class.

Methods inherited from class java.lang.Object

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

Methods inherited from interface ai.grakn.engine.tasks.TaskManager

chooseStorage

Constructor Detail

StandaloneTaskManager

public StandaloneTaskManager(EngineID engineId)

Method Detail

open

public TaskManager open()

close

public void close()

Specified by:

close in interface AutoCloseable

addTask

public void addTask(TaskState taskState)

Description copied from interface: TaskManager

Schedule a single shot/one off BackgroundTask to run after a @delay in milliseconds.

Specified by:

addTask in interface TaskManager

Parameters:

taskState - Task to execute

stopTask

public void stopTask(TaskId id)

Description copied from interface: TaskManager

Stop a Scheduled, Paused or Running task. Task's .stop() method will be called to perform any cleanup and the task is killed afterwards.

Specified by:

stopTask in interface TaskManager

Parameters:

id - ID of task to stop.

storage

public TaskStateStorage storage()

Description copied from interface: TaskManager

Return the StateStorage instance that is used by this class.

Specified by:

storage in interface TaskManager

Returns:

A StateStorage instance.