# org.hibernate.search.backend.spi

## Interfaces

- Backend
- BackendQueueProcessor
- BackendQueueProcessor.Transactional
- BatchBackend
- DeletionQuery
- OperationDispatcher
- Worker

## Classes

- DeleteByQueryLuceneWork
- DeleteByQueryWork
- LuceneIndexingParameters
- LuceneIndexingParameters.ParameterSet
- SingularTermDeletionQuery
- Work

## Enums

- SingularTermDeletionQuery.Type
- WorkType