org.apache.ignite.internal.processors.platform.compute

Class PlatformFullTask

java.lang.Object

org.apache.ignite.internal.processors.platform.compute.PlatformAbstractTask

org.apache.ignite.internal.processors.platform.compute.PlatformFullTask

All Implemented Interfaces:

Serializable, ComputeTask<Object,Void>

@ComputeTaskNoResultCache
public final class PlatformFullTask
extends PlatformAbstractTask

Interop task which requires full execution cycle.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.ignite.internal.processors.platform.compute.PlatformAbstractTask

ctx, done, lock, taskPtr

Constructor Summary

Constructors

Constructor and Description
PlatformFullTask(PlatformContext ctx, ClusterGroup grp, long taskPtr, long topVer, String taskName) Constructor.

Method Summary

Modifier and Type	Method and Description
@NotNull Map<? extends ComputeJob,ClusterNode>	map(List<ClusterNode> subgrid, @Nullable Object arg) This method is called to map or split grid task into multiple grid jobs.

Methods inherited from class org.apache.ignite.internal.processors.platform.compute.PlatformAbstractTask

onDone, reduce, result

Methods inherited from class java.lang.Object

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

Constructor Detail

PlatformFullTask

public PlatformFullTask(PlatformContext ctx,
                        ClusterGroup grp,
                        long taskPtr,
                        long topVer,
                        String taskName)

Constructor.

Parameters:

ctx - Platform context.

grp - Cluster group.

taskPtr - Pointer to the task in the native platform.

topVer - Initial topology version.

taskName - Task name.

Method Detail

map

@NotNull
public @NotNull Map<? extends ComputeJob,ClusterNode> map(List<ClusterNode> subgrid,
                                                                   @Nullable
                                                                   @Nullable Object arg)

This method is called to map or split grid task into multiple grid jobs. This is the first method that gets called when task execution starts.

Parameters:

subgrid - Nodes available for this task execution. Note that order of nodes is guaranteed to be randomized by container. This ensures that every time you simply iterate through grid nodes, the order of nodes will be random which over time should result into all nodes being used equally.

arg - Task execution argument. Can be null. This is the same argument as the one passed into Grid#execute(...) methods.

Returns:

Map of grid jobs assigned to subgrid node. Unless ComputeTaskContinuousMapper is injected into task, if null or empty map is returned, exception will be thrown.