org.apache.s4.core.ft
Interfaces 
CheckpointingFramework
StateStorage
StorageCallback
StorageCallbackFactory
Classes 
CheckpointId
CheckpointingConfig
CheckpointingConfig.Builder
CheckpointingTask
DefaultFileSystemStateStorage
FetchTask
FileSystemBackendCheckpointingModule
LoggingStorageCallbackFactory
NoOpCheckpointingFramework
SafeKeeper
SaveStateTask
SerializeTask
Enums 
CheckpointingConfig.CheckpointingMode
CheckpointingFramework.StorageResultCode