ai.grakn.engine.loader

Class LoaderTask

java.lang.Object

ai.grakn.engine.loader.LoaderTask

All Implemented Interfaces:

BackgroundTask

public class LoaderTask
extends Object
implements BackgroundTask

Task that will load data into the graph

Constructor Summary

Constructors

Constructor and Description
LoaderTask()

Method Summary

Modifier and Type	Method and Description
void	pause() Called to suspend the execution of a currently running task.
void	resume(java.util.function.Consumer<String> saveCheckpoint, String lastCheckpoint) This method may be called when resuming from a paused state or recovering from a crash or failure of any kind.
void	start(java.util.function.Consumer<String> saveCheckpoint, org.json.JSONObject configuration) Called to start execution of the task, may be called on a newly scheduled or previously stopped task.
void	stop() Called to stop execution of the task, may be called on a running or paused task.

Methods inherited from class java.lang.Object

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

Constructor Detail

LoaderTask

public LoaderTask()

Method Detail

start

public void start(java.util.function.Consumer<String> saveCheckpoint,
                  org.json.JSONObject configuration)

Description copied from interface: BackgroundTask

Called to start execution of the task, may be called on a newly scheduled or previously stopped task.

Specified by:

start in interface BackgroundTask

Parameters:

saveCheckpoint - Consumer which can be called at any time to save a state checkpoint that would allow the task to resume from this point should it crash.

stop

public void stop()

Description copied from interface: BackgroundTask

Called to stop execution of the task, may be called on a running or paused task. Task should stop gracefully. TODO: Should we allow start() to be called after stop()?

Specified by:

stop in interface BackgroundTask

pause

public void pause()

Description copied from interface: BackgroundTask

Called to suspend the execution of a currently running task. The object may be destroyed after this call. TODO: stop running

Specified by:

pause in interface BackgroundTask

resume

public void resume(java.util.function.Consumer<String> saveCheckpoint,
                   String lastCheckpoint)

Description copied from interface: BackgroundTask

This method may be called when resuming from a paused state or recovering from a crash or failure of any kind.

Specified by:

resume in interface BackgroundTask

Parameters:

saveCheckpoint - Consumer which can be called at any time to save a state checkpoint that would allow the task to resume from this point should it crash.

lastCheckpoint - The last checkpoint as sent to saveCheckpoint.