CheckpointCommittableManager (Flink : Runtime 2.0-preview1 API)

Type Parameters:

CommT - type of the committable
```
@Internal
public interface CheckpointCommittableManager<CommT>
```
A CheckpointCommittableManager collects committables for one checkpoint across potentially multiple upstream subtasks.
While it collects committables from multiple upstream subtasks, it belongs to exactly one committer subtask.
Each upstream subtask of this particular checkpoint is represented by a SubtaskCommittableManager.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Collection<CommittableWithLineage<CommT>>`	`commit(org.apache.flink.api.connector.sink2.Committer<CommT> committer)`	Commits all due committables if all respective committables of the specific subtask and checkpoint have been received.
`long`	`getCheckpointId()`	Returns the checkpoint id in which the committables were created.
`int`	`getNumberOfSubtasks()`	Returns the number of upstream subtasks belonging to the checkpoint.
`CommittableSummary<CommT>`	`getSummary(int emittingSubtaskId, int emittingNumberOfSubtasks)`	Returns a summary of the current commit progress for the emitting subtask identified by the parameters.

- Method Detail
  - getCheckpointId
```
long getCheckpointId()
```
    Returns the checkpoint id in which the committables were created.
    
    Returns:
    
    checkpoint id
  - getNumberOfSubtasks
```
int getNumberOfSubtasks()
```
    Returns the number of upstream subtasks belonging to the checkpoint.
  - getSummary
```
CommittableSummary<CommT> getSummary(int emittingSubtaskId,
                                     int emittingNumberOfSubtasks)
```
    Returns a summary of the current commit progress for the emitting subtask identified by the parameters.
  - commit
```
Collection<CommittableWithLineage<CommT>> commit(org.apache.flink.api.connector.sink2.Committer<CommT> committer)
                                          throws IOException,
                                                 InterruptedException
```
    Commits all due committables if all respective committables of the specific subtask and checkpoint have been received.
    
    Parameters:
    
    committer - used to commit to the external system
    
    Returns:
    
    successfully committed committables with meta information
    
    Throws:
    
    IOException
    
    InterruptedException