Package org.hibernate

Interface StatelessSession

All Superinterfaces:

AutoCloseable, Closeable, QueryProducer, Serializable, SharedSessionContract

All Known Implementing Classes:

StatelessSessionImpl

public interface StatelessSession
extends SharedSessionContract

A command-oriented API often used for performing bulk operations against the database. A stateless session has no persistence context, and always works directly with detached entity instances. When a method of this interface is called, any necessary interaction with the database happens immediately and synchronously.

Viewed in opposition to Session, the StatelessSession is a whole competing programming model, one preferred by some developers for its simplicity and somewhat lower level of abstraction. But the two kinds of session are not enemies, and may comfortably coexist in a single program.

A stateless session comes some with designed-in limitations:

• it does not have a first-level cache,
• nor interact with any second-level cache,
• nor does it implement transactional write-behind or automatic dirty checking, and
• nor do operations cascade to associated instances.

Furthermore:

• collections are completely ignored by a stateless session, and
• operations performed via a stateless session bypass Hibernate's event model, lifecycle callbacks, and interceptors.

Stateless sessions are vulnerable to data aliasing effects, due to the lack of a first-level cache.

On the other hand, for certain kinds of transactions, a stateless session may perform slightly faster than a stateful session.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the stateless session and release the JDBC connection.
void	delete(Object entity)	Delete a row.
void	delete(String entityName, Object entity)	Delete a row.
void	fetch(Object association)	Fetch an association that's configured for lazy loading.
<T> T	get(EntityGraph<T> graph, GraphSemantic graphSemantic, Object id)	Retrieve a row, fetching associations specified by the given EntityGraph.
<T> T	get(EntityGraph<T> graph, GraphSemantic graphSemantic, Object id, LockMode lockMode)	Retrieve a row, fetching associations specified by the given EntityGraph, and obtaining the specified lock mode.
<T> T	get(Class<T> entityClass, Object id)	Retrieve a row.
<T> T	get(Class<T> entityClass, Object id, LockMode lockMode)	Retrieve a row, obtaining the specified lock mode.
Object	get(String entityName, Object id)	Retrieve a row.
Object	get(String entityName, Object id, LockMode lockMode)	Retrieve a row, obtaining the specified lock mode.
Object	insert(Object entity)	Insert a row.
Object	insert(String entityName, Object entity)	Insert a row.
void	refresh(Object entity)	Refresh the entity instance state from the database.
void	refresh(Object entity, LockMode lockMode)	Refresh the entity instance state from the database.
void	refresh(String entityName, Object entity)	Refresh the entity instance state from the database.
void	refresh(String entityName, Object entity, LockMode lockMode)	Refresh the entity instance state from the database.
void	update(Object entity)	Update a row.
void	update(String entityName, Object entity)	Update a row.
void	upsert(Object entity)	Use a SQL merge into statement to perform an upsert.
void	upsert(String entityName, Object entity)	Use a SQL merge into statement to perform an upsert.

Methods inherited from interface org.hibernate.query.QueryProducer

createMutationQuery, createMutationQuery, createMutationQuery, createMutationQuery, createNamedMutationQuery, createNamedQuery, createNamedQuery, createNamedSelectionQuery, createNamedSelectionQuery, createNativeMutationQuery, createNativeQuery, createNativeQuery, createNativeQuery, createNativeQuery, createNativeQuery, createQuery, createQuery, createQuery, createQuery, createQuery, createSelectionQuery, createSelectionQuery, createSelectionQuery, getNamedNativeQuery, getNamedNativeQuery, getNamedQuery

Methods inherited from interface org.hibernate.SharedSessionContract

beginTransaction, createEntityGraph, createEntityGraph, createEntityGraph, createNamedStoredProcedureQuery, createStoredProcedureCall, createStoredProcedureCall, createStoredProcedureCall, createStoredProcedureQuery, createStoredProcedureQuery, createStoredProcedureQuery, doReturningWork, doWork, getCriteriaBuilder, getEntityGraph, getEntityGraphs, getFactory, getJdbcBatchSize, getNamedProcedureCall, getTenantIdentifier, getTenantIdentifierValue, getTransaction, isConnected, isJoinedToTransaction, isOpen, joinTransaction, setJdbcBatchSize

Method Detail

close

void close()

Close the stateless session and release the JDBC connection.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in interface SharedSessionContract

insert

Object insert(Object entity)

Insert a row.

Parameters:

entity - a new transient instance

Returns:

The identifier of the inserted entity

insert

Object insert(String entityName,
              Object entity)

Insert a row.

Parameters:

entityName - The entityName for the entity to be inserted

entity - a new transient instance

Returns:

the identifier of the instance

update

void update(Object entity)

Update a row.

Parameters:

entity - a detached entity instance

update

void update(String entityName,
            Object entity)

Update a row.

Parameters:

entityName - The entityName for the entity to be updated

entity - a detached entity instance

delete

void delete(Object entity)

Delete a row.

Parameters:

entity - a detached entity instance

delete

void delete(String entityName,
            Object entity)

Delete a row.

Parameters:

entityName - The entityName for the entity to be deleted

entity - a detached entity instance

upsert

@Incubating
void upsert(Object entity)

Use a SQL merge into statement to perform an upsert.

Parameters:

entity - a detached entity instance

Throws:

TransientObjectException - is the entity is transient

Since:

6.3

upsert

@Incubating
void upsert(String entityName,
            Object entity)

Use a SQL merge into statement to perform an upsert.

Parameters:

entityName - The entityName for the entity to be merged

entity - a detached entity instance

Throws:

TransientObjectException - is the entity is transient

Since:

6.3

get

Object get(String entityName,
           Object id)

Retrieve a row.

Parameters:

entityName - The name of the entity to retrieve

id - The id of the entity to retrieve

Returns:

a detached entity instance

get

<T> T get(Class<T> entityClass,
          Object id)

Retrieve a row.

Parameters:

entityClass - The class of the entity to retrieve

id - The id of the entity to retrieve

Returns:

a detached entity instance

get

Object get(String entityName,
           Object id,
           LockMode lockMode)

Retrieve a row, obtaining the specified lock mode.

Parameters:

entityName - The name of the entity to retrieve

id - The id of the entity to retrieve

lockMode - The lock mode to apply to the entity

Returns:

a detached entity instance

get

<T> T get(Class<T> entityClass,
          Object id,
          LockMode lockMode)

Retrieve a row, obtaining the specified lock mode.

Parameters:

entityClass - The class of the entity to retrieve

id - The id of the entity to retrieve

lockMode - The lock mode to apply to the entity

Returns:

a detached entity instance

get

<T> T get(EntityGraph<T> graph,
          GraphSemantic graphSemantic,
          Object id)

Retrieve a row, fetching associations specified by the given EntityGraph.

Parameters:

graph - The EntityGraph

graphSemantic - a GraphSemantic specifying how the graph should be interpreted

id - The id of the entity to retrieve

Returns:

a detached entity instance

Since:

6.3

get

<T> T get(EntityGraph<T> graph,
          GraphSemantic graphSemantic,
          Object id,
          LockMode lockMode)

Retrieve a row, fetching associations specified by the given EntityGraph, and obtaining the specified lock mode.

Parameters:

graph - The EntityGraph

graphSemantic - a GraphSemantic specifying how the graph should be interpreted

id - The id of the entity to retrieve

lockMode - The lock mode to apply to the entity

Returns:

a detached entity instance

Since:

6.3

refresh

void refresh(Object entity)

Refresh the entity instance state from the database.

Parameters:

entity - The entity to be refreshed.

refresh

void refresh(String entityName,
             Object entity)

Refresh the entity instance state from the database.

Parameters:

entityName - The entityName for the entity to be refreshed.

entity - The entity to be refreshed.

refresh

void refresh(Object entity,
             LockMode lockMode)

Refresh the entity instance state from the database.

Parameters:

entity - The entity to be refreshed.

lockMode - The LockMode to be applied.

refresh

void refresh(String entityName,
             Object entity,
             LockMode lockMode)

Refresh the entity instance state from the database.

Parameters:

entityName - The entityName for the entity to be refreshed.

entity - The entity to be refreshed.

lockMode - The LockMode to be applied.

fetch

void fetch(Object association)

Fetch an association that's configured for lazy loading.

Warning: this operation in a stateless session is quite sensitive to data aliasing effects and should be used with great care.

Parameters:

association - a lazy-loaded association

Since:

6.0

See Also:

Hibernate.initialize(Object)