ai.grakn.engine.tasks.manager

Class StandaloneTaskManager

java.lang.Object

ai.grakn.engine.tasks.manager.StandaloneTaskManager

All Implemented Interfaces:

TaskManager, TaskSubmitter, Closeable, 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, GraknEngineConfig config, RedisCountStorage redis, EngineGraknGraphFactory factory, LockProvider lockProvider, com.codahale.metrics.MetricRegistry metricRegistry)

Method Summary

Modifier and Type	Method and Description
void	addTask(TaskState taskState, TaskConfiguration configuration) Schedule a BackgroundTask for execution.
void	close()
CompletableFuture<Void>	start() Make sure the manager is initialized and starts processing tasks
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

Constructor Detail

StandaloneTaskManager

public StandaloneTaskManager(EngineID engineId,
                             GraknEngineConfig config,
                             RedisCountStorage redis,
                             EngineGraknGraphFactory factory,
                             LockProvider lockProvider,
                             com.codahale.metrics.MetricRegistry metricRegistry)

Method Detail

close

public void close()

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

addTask

public void addTask(TaskState taskState,
                    TaskConfiguration configuration)

Description copied from interface: TaskSubmitter

Schedule a BackgroundTask for execution.

Specified by:

addTask in interface TaskSubmitter

Parameters:

taskState - Task to execute

start

public CompletableFuture<Void> start()

Description copied from interface: TaskManager

Make sure the manager is initialized and starts processing tasks

Specified by:

start in interface TaskManager

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.