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

Class PlatformBroadcastingMultiClosureTask

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, ComputeTask<Object,Void>

@ComputeTaskNoResultCache
public class PlatformBroadcastingMultiClosureTask
extends PlatformAbstractTask

Interop multi-closure task with broadcast semantics.

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
PlatformBroadcastingMultiClosureTask(PlatformContext ctx, long taskPtr) Constructor.

Method Summary

Modifier and Type	Method and Description
void	jobs(Collection<PlatformJob> jobs)
@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

PlatformBroadcastingMultiClosureTask

public PlatformBroadcastingMultiClosureTask(PlatformContext ctx,
                                            long taskPtr)

Constructor.

Parameters:

ctx - Platform context.

taskPtr - Task pointer.

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.

jobs

public void jobs(Collection<PlatformJob> jobs)

Parameters:

jobs - Jobs.