CheckpointIDCounter (Flink : Runtime 2.1.1 API)

All Known Implementing Classes:

DeactivatedCheckpointIDCounter, StandaloneCheckpointIDCounter, ZooKeeperCheckpointIDCounter
```
public interface CheckpointIDCounter
```
A checkpoint ID counter.

Field Summary

Fields
Modifier and Type Field Description

static int INITIAL_CHECKPOINT_ID

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`long`	`get()`	Atomically gets the current checkpoint ID.
`long`	`getAndIncrement()`	Atomically increments the current checkpoint ID.
`void`	`setCount(long newId)`	Sets the current checkpoint ID.
`CompletableFuture<Void>`	`shutdown(org.apache.flink.api.common.JobStatus jobStatus)`	Shuts the `CheckpointIDCounter` service.
`void`	`start()`	Starts the `CheckpointIDCounter` service down.

- Field Detail
  - INITIAL_CHECKPOINT_ID
```
static final int INITIAL_CHECKPOINT_ID
```
    See Also:
    
    Constant Field Values
- Method Detail
  - start
```
void start()
    throws Exception
```
    Starts the CheckpointIDCounter service down.
    
    Throws:
    
    Exception
  - shutdown
```
CompletableFuture<Void> shutdown(org.apache.flink.api.common.JobStatus jobStatus)
```
    Shuts the CheckpointIDCounter service.
    The job status is forwarded and used to decide whether state should actually be discarded or kept.
    
    Parameters:
    
    jobStatus - Job state on shut down
    
    Returns:
    
    The CompletableFuture holding the result of the shutdown operation.
  - getAndIncrement
```
long getAndIncrement()
              throws Exception
```
    Atomically increments the current checkpoint ID.
    
    Returns:
    
    The previous checkpoint ID
    
    Throws:
    
    Exception
  - get
```
long get()
```
    Atomically gets the current checkpoint ID.
    
    Returns:
    
    The current checkpoint ID
  - setCount
```
void setCount(long newId)
       throws Exception
```
    Sets the current checkpoint ID.
    
    Parameters:
    
    newId - The new ID
    
    Throws:
    
    Exception