PlatformBalancingSingleClosureTask (Ignite 2.17.0)

java.lang.Object
- org.apache.ignite.internal.processors.platform.compute.PlatformAbstractTask
- - org.apache.ignite.internal.processors.platform.compute.PlatformBalancingSingleClosureTask

All Implemented Interfaces:

Serializable, ComputeTask<Object,Void>
```
@ComputeTaskNoResultCache
public class PlatformBalancingSingleClosureTask
extends PlatformAbstractTask
```
Interop single-closure task with node balancing.

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 Description

PlatformBalancingSingleClosureTask(PlatformContext ctx, long taskPtr)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`job(PlatformJob job)`
`@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
  - PlatformBalancingSingleClosureTask
```
public PlatformBalancingSingleClosureTask(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.
  - job
```
public void job(PlatformJob job)
```
    Parameters:
    
    job - Job.