PartitionTracker (Flink : 2.0-preview1 API)

All Known Subinterfaces:

JobMasterPartitionTracker, TaskExecutorPartitionTracker

All Known Implementing Classes:

AbstractPartitionTracker, JobMasterPartitionTrackerImpl, TaskExecutorPartitionTrackerImpl
```
public interface PartitionTracker<K,M>
```
Utility for tracking partitions.
This interface deliberately does not have a method to start tracking partitions, so that implementation are flexible in their definitions for this method (otherwise one would end up with multiple methods, with one part likely being unused).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`isPartitionTracked(ResultPartitionID resultPartitionID)`	Returns whether the given partition is being tracked.
`boolean`	`isTrackingPartitionsFor(K key)`	Returns whether any partition is being tracked for the given key.
`Collection<PartitionTrackerEntry<K,M>>`	`stopTrackingPartitions(Collection<ResultPartitionID> resultPartitionIds)`	Stops the tracking of the given partitions.
`Collection<PartitionTrackerEntry<K,M>>`	`stopTrackingPartitionsFor(K key)`	Stops the tracking of all partitions for the given key.

- Method Detail
  - stopTrackingPartitionsFor
```
Collection<PartitionTrackerEntry<K,M>> stopTrackingPartitionsFor(K key)
```
    Stops the tracking of all partitions for the given key.
  - stopTrackingPartitions
```
Collection<PartitionTrackerEntry<K,M>> stopTrackingPartitions(Collection<ResultPartitionID> resultPartitionIds)
```
    Stops the tracking of the given partitions.
  - isTrackingPartitionsFor
```
boolean isTrackingPartitionsFor(K key)
```
    Returns whether any partition is being tracked for the given key.
  - isPartitionTracked
```
boolean isPartitionTracked(ResultPartitionID resultPartitionID)
```
    Returns whether the given partition is being tracked.