Package org.apache.flink.runtime.checkpoint

Interface CheckpointIDCounter

All Known Implementing Classes:

DeactivatedCheckpointIDCounter, StandaloneCheckpointIDCounter, ZooKeeperCheckpointIDCounter

public interface CheckpointIDCounter

A checkpoint ID counter.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	INITIAL_CHECKPOINT_ID

Method Summary

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 Details

INITIAL_CHECKPOINT_ID

static final int INITIAL_CHECKPOINT_ID

See Also:

• Constant Field Values

Method Details

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