LocalChangelogRegistry (Flink : Runtime 2.0.0 API)

All Superinterfaces:

AutoCloseable, Closeable

All Known Implementing Classes:

LocalChangelogRegistryImpl
```
@Internal
public interface LocalChangelogRegistry
extends Closeable
```
This registry is responsible for deleting changlog's local handles which are not in use.

Field Summary

Fields
Modifier and Type Field Description

static LocalChangelogRegistry NO_OP

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`discardUpToCheckpoint(long upTo)`	Called upon ChangelogKeyedStateBackend#notifyCheckpointComplete and ChangelogKeyedStateBackend#notifyCheckpointSubsumed.
`void`	`register(StreamStateHandle handle, long checkpointID)`	Called upon ChangelogKeyedStateBackend#notifyCheckpointComplete.

Methods inherited from interface java.io.Closeable
close

- Field Detail
  - NO_OP
```
static final LocalChangelogRegistry NO_OP
```
- Method Detail
  - register
```
void register(StreamStateHandle handle,
              long checkpointID)
```
    Called upon ChangelogKeyedStateBackend#notifyCheckpointComplete.
    
    Parameters:
    
    handle - handle to register.
    
    checkpointID - latest used checkpointID.
  - discardUpToCheckpoint
```
void discardUpToCheckpoint(long upTo)
```
    Called upon ChangelogKeyedStateBackend#notifyCheckpointComplete and ChangelogKeyedStateBackend#notifyCheckpointSubsumed. Remote dstl handles are unregistered when CompletedCheckpointStore.addCheckpointAndSubsumeOldestOne(org.apache.flink.runtime.checkpoint.CompletedCheckpoint, org.apache.flink.runtime.checkpoint.CheckpointsCleaner, java.lang.Runnable), local dtsl handles are unregistered when the checkpoint completes, because only one checkpoint is kept for local recovery.
    
    Parameters:
    
    upTo - lowest CheckpointID which is still valid.