org.apache.ignite.internal.management.wal

Class WalTask

java.lang.Object

org.apache.ignite.internal.visor.VisorMultiNodeTask<WalDeleteCommandArg,WalTaskResult,Collection<String>>

org.apache.ignite.internal.management.wal.WalTask

All Implemented Interfaces:

Serializable, ComputeTask<VisorTaskArgument<WalDeleteCommandArg>,WalTaskResult>

@GridInternal
public class WalTask
extends VisorMultiNodeTask<WalDeleteCommandArg,WalTaskResult,Collection<String>>

Performs WAL cleanup clusterwide.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.ignite.internal.visor.VisorMultiNodeTask

debug, ignite, start, taskArg

Constructor Summary

Constructors

Constructor and Description
WalTask()

Method Summary

Modifier and Type	Method and Description
protected org.apache.ignite.internal.management.wal.WalTask.WalJob	job(WalDeleteCommandArg arg)
protected Collection<UUID>	jobNodes(VisorTaskArgument<WalDeleteCommandArg> arg)
protected @Nullable WalTaskResult	reduce0(List<ComputeJobResult> results) Actual reduce logic.

Methods inherited from class org.apache.ignite.internal.visor.VisorMultiNodeTask

map, map0, reduce, result

Methods inherited from class java.lang.Object

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

Constructor Detail

WalTask

public WalTask()

Method Detail

job

protected org.apache.ignite.internal.management.wal.WalTask.WalJob job(WalDeleteCommandArg arg)

Specified by:

job in class VisorMultiNodeTask<WalDeleteCommandArg,WalTaskResult,Collection<String>>

Parameters:

arg - Task arg.

Returns:

New job.

jobNodes

protected Collection<UUID> jobNodes(VisorTaskArgument<WalDeleteCommandArg> arg)

Overrides:

jobNodes in class VisorMultiNodeTask<WalDeleteCommandArg,WalTaskResult,Collection<String>>

Returns:

Collection of nodes IDs where jobs should be mapped.

reduce0

@Nullable
protected @Nullable WalTaskResult reduce0(List<ComputeJobResult> results)
                                             throws IgniteException

Actual reduce logic.

Specified by:

reduce0 in class VisorMultiNodeTask<WalDeleteCommandArg,WalTaskResult,Collection<String>>

Parameters:

results - Job results.

Returns:

Task result.

Throws:

IgniteException - If reduction or results caused an error.