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SessionFactoryUtils (Spring Framework API 2.0) - Spring Framework 2.0.5 API 文档英文版

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org.springframework.orm.hibernate3
Class SessionFactoryUtils

java.lang.Object
  org.springframework.orm.hibernate3.SessionFactoryUtils

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public abstract class SessionFactoryUtils
extends Object

Helper class featuring methods for Hibernate Session handling, allowing for reuse of Hibernate Session instances within transactions. Also provides support for exception translation.

Supports synchronization with both Spring-managed JTA transactions (see JtaTransactionManager) and non-Spring JTA transactions (i.e. plain JTA or EJB CMT), transparently providing transaction-scoped Hibernate Sessions. Note that for non-Spring JTA transactions, a JTA TransactionManagerLookup has to be specified in the Hibernate configuration.

Used internally by HibernateTemplate, HibernateInterceptor and HibernateTransactionManager. Can also be used directly in application code.

Since:

1.2

Author:

Juergen Hoeller

See Also:

getSession(org.hibernate.SessionFactory, boolean), releaseSession(org.hibernate.Session, org.hibernate.SessionFactory), HibernateTransactionManager, JtaTransactionManager, TransactionSynchronizationManager

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Field Summary
static int	SESSION_SYNCHRONIZATION_ORDER           Order value for TransactionSynchronization objects that clean up Hibernate Sessions.

 

Constructor Summary
SessionFactoryUtils()

 

Method Summary
static void	applyTransactionTimeout(Criteria criteria, SessionFactory sessionFactory)           Apply the current transaction timeout, if any, to the given Hibernate Criteria object.
static void	applyTransactionTimeout(Query query, SessionFactory sessionFactory)           Apply the current transaction timeout, if any, to the given Hibernate Query object.
static void	closeSession(Session session)           Perform actual closing of the Hibernate Session, catching and logging any cleanup exceptions thrown.
static DataAccessException	convertHibernateAccessException(HibernateException ex)           Convert the given HibernateException to an appropriate exception from the org.springframework.dao hierarchy.
static Session	doGetSession(SessionFactory sessionFactory, boolean allowCreate)           Get a Hibernate Session for the given SessionFactory.
static DataSource	getDataSource(SessionFactory sessionFactory)           Determine the DataSource of the given SessionFactory.
static TransactionManager	getJtaTransactionManager(SessionFactory sessionFactory, Session session)           Try to retrieve the JTA TransactionManager from the given SessionFactory and/or Session.
static Session	getNewSession(SessionFactory sessionFactory)           Get a new Hibernate Session from the given SessionFactory.
static Session	getNewSession(SessionFactory sessionFactory, Interceptor entityInterceptor)           Get a new Hibernate Session from the given SessionFactory.
static Session	getSession(SessionFactory sessionFactory, boolean allowCreate)           Get a Hibernate Session for the given SessionFactory.
static Session	getSession(SessionFactory sessionFactory, Interceptor entityInterceptor, SQLExceptionTranslator jdbcExceptionTranslator)           Get a Hibernate Session for the given SessionFactory.
static void	initDeferredClose(SessionFactory sessionFactory)           Initialize deferred close for the current thread and the given SessionFactory.
static boolean	isDeferredCloseActive(SessionFactory sessionFactory)           Determine whether deferred close is active for the current thread and the given SessionFactory.
static boolean	isSessionTransactional(Session session, SessionFactory sessionFactory)           Return whether the given Hibernate Session is transactional, that is, bound to the current thread by Spring's transaction facilities.
static SQLExceptionTranslator	newJdbcExceptionTranslator(SessionFactory sessionFactory)           Create an appropriate SQLExceptionTranslator for the given SessionFactory.
static void	processDeferredClose(SessionFactory sessionFactory)           Process all Hibernate Sessions that have been registered for deferred close for the given SessionFactory.
static void	releaseSession(Session session, SessionFactory sessionFactory)           Close the given Session, created via the given factory, if it is not managed externally (i.e. not bound to the thread).
static String	toString(Session session)           Stringify the given Session for debug logging.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

SESSION_SYNCHRONIZATION_ORDER

public static final int SESSION_SYNCHRONIZATION_ORDER

Order value for TransactionSynchronization objects that clean up Hibernate Sessions. Returns DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER - 100 to execute Session cleanup before JDBC Connection cleanup, if any.

See Also:

DataSourceUtils.CONNECTION_SYNCHRONIZATION_ORDER, Constant Field Values

Constructor Detail

SessionFactoryUtils

public SessionFactoryUtils()

Method Detail

getDataSource

public static DataSource getDataSource(SessionFactory sessionFactory)

Determine the DataSource of the given SessionFactory.

Parameters:

sessionFactory - the SessionFactory to check

Returns:

the DataSource, or null if none found

See Also:

SessionFactoryImplementor.getConnectionProvider(), LocalDataSourceConnectionProvider

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newJdbcExceptionTranslator

public static SQLExceptionTranslator newJdbcExceptionTranslator(SessionFactory sessionFactory)

Create an appropriate SQLExceptionTranslator for the given SessionFactory. If a DataSource is found, a SQLErrorCodeSQLExceptionTranslator for the DataSource is created; else, a SQLStateSQLExceptionTranslator as fallback.

Parameters:

sessionFactory - the SessionFactory to create the translator for

Returns:

the SQLExceptionTranslator

See Also:

getDataSource(org.hibernate.SessionFactory), SQLErrorCodeSQLExceptionTranslator, SQLStateSQLExceptionTranslator

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getJtaTransactionManager

public static TransactionManager getJtaTransactionManager(SessionFactory sessionFactory,
                                                          Session session)

Try to retrieve the JTA TransactionManager from the given SessionFactory and/or Session. Check the passed-in SessionFactory for implementing SessionFactoryImplementor (the usual case), falling back to the SessionFactory reference that the Session itself carries.

Parameters:

sessionFactory - Hibernate SessionFactory

session - Hibernate Session (can also be null)

Returns:

the JTA TransactionManager, if any

See Also:

TransactionManager, SessionFactoryImplementor.getTransactionManager(), Session.getSessionFactory(), SessionFactoryImpl

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getSession

public static Session getSession(SessionFactory sessionFactory,
                                 boolean allowCreate)
                          throws DataAccessResourceFailureException,
                                 IllegalStateException

Get a Hibernate Session for the given SessionFactory. Is aware of and will return any existing corresponding Session bound to the current thread, for example when using HibernateTransactionManager. Will create a new Session otherwise, if "allowCreate" is true.

This is the getSession method used by typical data access code, in combination with releaseSession called when done with the Session. Note that HibernateTemplate allows to write data access code without caring about such resource handling.

Parameters:

sessionFactory - Hibernate SessionFactory to create the session with

allowCreate - whether a non-transactional Session should be created when no transactional Session can be found for the current thread

Returns:

the Hibernate Session

Throws:

DataAccessResourceFailureException - if the Session couldn't be created

IllegalStateException - if no thread-bound Session found and "allowCreate" is false

See Also:

getSession(SessionFactory, Interceptor, SQLExceptionTranslator), releaseSession(org.hibernate.Session, org.hibernate.SessionFactory), HibernateTemplate

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getSession

public static Session getSession(SessionFactory sessionFactory,
                                 Interceptor entityInterceptor,
                                 SQLExceptionTranslator jdbcExceptionTranslator)
                          throws DataAccessResourceFailureException

Get a Hibernate Session for the given SessionFactory. Is aware of and will return any existing corresponding Session bound to the current thread, for example when using HibernateTransactionManager. Will always create a new Session otherwise.

Supports setting a Session-level Hibernate entity interceptor that allows to inspect and change property values before writing to and reading from the database. Such an interceptor can also be set at the SessionFactory level (i.e. on LocalSessionFactoryBean), on HibernateTransactionManager, or on HibernateInterceptor/HibernateTemplate.

Parameters:

sessionFactory - Hibernate SessionFactory to create the session with

entityInterceptor - Hibernate entity interceptor, or null if none

jdbcExceptionTranslator - SQLExcepionTranslator to use for flushing the Session on transaction synchronization (may be null; only used when actually registering a transaction synchronization)

Returns:

the Hibernate Session

Throws:

DataAccessResourceFailureException - if the Session couldn't be created

See Also:

LocalSessionFactoryBean.setEntityInterceptor(org.hibernate.Interceptor), HibernateAccessor.setEntityInterceptor(org.hibernate.Interceptor), HibernateAccessor.setEntityInterceptor(org.hibernate.Interceptor)

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doGetSession

public static Session doGetSession(SessionFactory sessionFactory,
                                   boolean allowCreate)
                            throws HibernateException,
                                   IllegalStateException

Get a Hibernate Session for the given SessionFactory. Is aware of and will return any existing corresponding Session bound to the current thread, for example when using HibernateTransactionManager. Will create a new Session otherwise, if "allowCreate" is true.

Throws the original HibernateException, in contrast to getSession(org.hibernate.SessionFactory, boolean).

Parameters:

sessionFactory - Hibernate SessionFactory to create the session with

allowCreate - whether a non-transactional Session should be created when no transactional Session can be found for the current thread

Returns:

the Hibernate Session

Throws:

HibernateException - if the Session couldn't be created

IllegalStateException - if no thread-bound Session found and allowCreate false

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getNewSession

public static Session getNewSession(SessionFactory sessionFactory)

Get a new Hibernate Session from the given SessionFactory. Will return a new Session even if there already is a pre-bound Session for the given SessionFactory.

Within a transaction, this method will create a new Session that shares the transaction's JDBC Connection. More specifically, it will use the same JDBC Connection as the pre-bound Hibernate Session.

Parameters:

sessionFactory - Hibernate SessionFactory to create the session with

Returns:

the new Session

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getNewSession

public static Session getNewSession(SessionFactory sessionFactory,
                                    Interceptor entityInterceptor)

Get a new Hibernate Session from the given SessionFactory. Will return a new Session even if there already is a pre-bound Session for the given SessionFactory.

Within a transaction, this method will create a new Session that shares the transaction's JDBC Connection. More specifically, it will use the same JDBC Connection as the pre-bound Hibernate Session.

Parameters:

sessionFactory - Hibernate SessionFactory to create the session with

entityInterceptor - Hibernate entity interceptor, or null if none

Returns:

the new Session

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toString

public static String toString(Session session)

Stringify the given Session for debug logging. Returns output equivalent to Object.toString(): the fully qualified class name + "@" + the identity hash code.

The only reason why this is necessary is because Hibernate3's Session.toString() implementation is broken (and won't be fixed): it logs the toString representation of all persistent objects in the Session, which might lead to ConcurrentModificationExceptions if the persistent objects in turn refer to the Session (for example, for lazy loading).

Parameters:

session - the Hibernate Session to stringify

Returns:

the String representation of the given Session

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isSessionTransactional

public static boolean isSessionTransactional(Session session,
                                             SessionFactory sessionFactory)

Return whether the given Hibernate Session is transactional, that is, bound to the current thread by Spring's transaction facilities.

Parameters:

session - the Hibernate Session to check

sessionFactory - Hibernate SessionFactory that the Session was created with (may be null)

Returns:

whether the Session is transactional

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applyTransactionTimeout

public static void applyTransactionTimeout(Query query,
                                           SessionFactory sessionFactory)

Apply the current transaction timeout, if any, to the given Hibernate Query object.

Parameters:

query - the Hibernate Query object

sessionFactory - Hibernate SessionFactory that the Query was created for (may be null)

See Also:

Query.setTimeout(int)

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applyTransactionTimeout

public static void applyTransactionTimeout(Criteria criteria,
                                           SessionFactory sessionFactory)

Apply the current transaction timeout, if any, to the given Hibernate Criteria object.

Parameters:

criteria - the Hibernate Criteria object

sessionFactory - Hibernate SessionFactory that the Criteria was created for

See Also:

Criteria.setTimeout(int)

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convertHibernateAccessException

public static DataAccessException convertHibernateAccessException(HibernateException ex)

Convert the given HibernateException to an appropriate exception from the org.springframework.dao hierarchy.

Parameters:

ex - HibernateException that occured

Returns:

the corresponding DataAccessException instance

See Also:

HibernateAccessor.convertHibernateAccessException(org.hibernate.HibernateException), HibernateTransactionManager.convertHibernateAccessException(org.hibernate.HibernateException)

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isDeferredCloseActive

public static boolean isDeferredCloseActive(SessionFactory sessionFactory)

Determine whether deferred close is active for the current thread and the given SessionFactory.

Parameters:

sessionFactory - the Hibernate SessionFactory to check

Returns:

whether deferred close is active

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initDeferredClose

public static void initDeferredClose(SessionFactory sessionFactory)

Initialize deferred close for the current thread and the given SessionFactory. Sessions will not be actually closed on close calls then, but rather at a processDeferredClose(org.hibernate.SessionFactory) call at a finishing point (like request completion).

Used by OpenSessionInViewFilter and OpenSessionInViewInterceptor when not configured for a single session.

Parameters:

sessionFactory - the Hibernate SessionFactory to initialize deferred close for

See Also:

processDeferredClose(org.hibernate.SessionFactory), releaseSession(org.hibernate.Session, org.hibernate.SessionFactory), OpenSessionInViewFilter.setSingleSession(boolean), OpenSessionInViewInterceptor.setSingleSession(boolean)

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processDeferredClose

public static void processDeferredClose(SessionFactory sessionFactory)

Process all Hibernate Sessions that have been registered for deferred close for the given SessionFactory.

Parameters:

sessionFactory - the Hibernate SessionFactory to process deferred close for

See Also:

initDeferredClose(org.hibernate.SessionFactory), releaseSession(org.hibernate.Session, org.hibernate.SessionFactory)

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releaseSession

public static void releaseSession(Session session,
                                  SessionFactory sessionFactory)

Close the given Session, created via the given factory, if it is not managed externally (i.e. not bound to the thread).

Parameters:

session - the Hibernate Session to close (may be null)

sessionFactory - Hibernate SessionFactory that the Session was created with (may be null)

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closeSession

public static void closeSession(Session session)

Perform actual closing of the Hibernate Session, catching and logging any cleanup exceptions thrown.

Parameters:

session - the Hibernate Session to close (may be null)

See Also:

Session.close()

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