io.ray.streaming.state

Interface StateStoreManager

All Known Implementing Classes:

AbstractKeyStateBackend, AbstractStateStoreManager, DualStateStoreManager, KeyStateBackend, ListStateStoreManagerProxy, MapStateStoreManagerProxy, MVStateStoreManager, OperatorStateBackend, StateStoreManagerProxy, ValueStateStoreManagerProxy

public interface StateStoreManager

TransactionState interface.

Streaming State should implement transaction in case of failure, which in our case is four default method, finish, commit, ackCommit, rollback.

Method Summary

Modifier and Type	Method and Description
void	ackCommit(long checkpointId, long timeStamp) The ackCommit method is used for cleaning the last checkpoint, and must be called after commit in the same thread.
void	commit(long checkpointId) The commit method is used for persistent, and can be used in another thread to reach async state commit.
void	finish(long checkpointId) The finish method is used when the batched data is all saved in state.
void	rollBack(long checkpointId) The rollback method is used for recovering the checkpoint.

Method Detail

finish

void finish(long checkpointId)

The finish method is used when the batched data is all saved in state. Normally, serialization job is done here.

commit

void commit(long checkpointId)

The commit method is used for persistent, and can be used in another thread to reach async state commit. Normally, data persistent is done here.

ackCommit

void ackCommit(long checkpointId,
               long timeStamp)

The ackCommit method is used for cleaning the last checkpoint, and must be called after commit in the same thread.

rollBack

void rollBack(long checkpointId)

The rollback method is used for recovering the checkpoint.