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java.lang.Objectorg.springframework.transaction.support.AbstractPlatformTransactionManager
org.springframework.orm.jpa.JpaTransactionManager
public class JpaTransactionManager
PlatformTransactionManager
implementation
for a single JPA EntityManagerFactory
. Binds a JPA
EntityManager from the specified factory to the thread, potentially allowing for
one thread-bound EntityManager per factory. SharedEntityManagerCreator
and JpaTemplate
are aware of thread-bound entity managers and participate
in such transactions automatically. Using either is required for JPA access code
supporting this transaction management mechanism.
This transaction manager is appropriate for applications that use a single
JPA EntityManagerFactory for transactional data access. JTA (usually through
JtaTransactionManager
) is necessary
for accessing multiple transactional resources within the same transaction.
Note that you need to configure your JPA provider accordingly in order to make
it participate in JTA transactions.
This transaction manager also supports direct DataSource access within a
transaction (i.e. plain JDBC code working with the same DataSource).
This allows for mixing services which access JPA and services which use plain
JDBC (without being aware of JPA)! Application code needs to stick to the
same simple Connection lookup pattern as with
DataSourceTransactionManager
(i.e. DataSourceUtils.getConnection(javax.sql.DataSource)
or going through a
TransactionAwareDataSourceProxy
).
Note that this requires a vendor-specific JpaDialect
to be configured.
Note: To be able to register a DataSource's Connection for plain JDBC code,
this instance needs to be aware of the DataSource (setDataSource(javax.sql.DataSource)
).
The given DataSource should obviously match the one used by the given
EntityManagerFactory. This transaction manager will autodetect the DataSource
used as known connection factory of the EntityManagerFactory, so you usually
don't need to explicitly specify the "dataSource" property.
On JDBC 3.0, this transaction manager supports nested transactions via JDBC 3.0
Savepoints. The AbstractPlatformTransactionManager.setNestedTransactionAllowed(boolean)
"nestedTransactionAllowed"}
flag defaults to "false", though, as nested transactions will just apply to the
JDBC Connection, not to the JPA EntityManager and its cached objects.
You can manually set the flag to "true" if you want to use nested transactions
for JDBC access code which participates in JPA transactions (provided that your
JDBC driver supports Savepoints). Note that JPA itself does not support
nested transactions! Hence, do not expect JPA access code to semantically
participate in a nested transaction.
setEntityManagerFactory(javax.persistence.EntityManagerFactory)
,
setDataSource(javax.sql.DataSource)
,
LocalEntityManagerFactoryBean
,
JpaTemplate.execute(org.springframework.orm.jpa.JpaCallback)
,
SharedEntityManagerBean
,
DataSourceUtils.getConnection(javax.sql.DataSource)
,
DataSourceUtils.releaseConnection(java.sql.Connection, javax.sql.DataSource)
,
JdbcTemplate
,
DataSourceTransactionManager
,
JtaTransactionManager
,
Serialized FormField Summary |
---|
Fields inherited from class org.springframework.transaction.support.AbstractPlatformTransactionManager |
---|
logger, SYNCHRONIZATION_ALWAYS, SYNCHRONIZATION_NEVER, SYNCHRONIZATION_ON_ACTUAL_TRANSACTION |
Constructor Summary | |
---|---|
JpaTransactionManager()
Create a new JpaTransactionManager instance. |
|
JpaTransactionManager(javax.persistence.EntityManagerFactory emf)
Create a new JpaTransactionManager instance. |
Method Summary | |
---|---|
void |
afterPropertiesSet()
Eagerly initialize the JPA dialect, creating a default one for the specified EntityManagerFactory if none set. |
protected javax.persistence.EntityManager |
createEntityManagerForTransaction()
Create a JPA EntityManager to be used for a transaction. |
protected void |
doBegin(Object transaction,
TransactionDefinition definition)
Begin a new transaction with semantics according to the given transaction definition. |
protected void |
doCleanupAfterCompletion(Object transaction)
Cleanup resources after transaction completion. |
protected void |
doCommit(DefaultTransactionStatus status)
Perform an actual commit of the given transaction. |
protected Object |
doGetTransaction()
Return a transaction object for the current transaction state. |
protected void |
doResume(Object transaction,
Object suspendedResources)
Resume the resources of the current transaction. |
protected void |
doRollback(DefaultTransactionStatus status)
Perform an actual rollback of the given transaction. |
protected void |
doSetRollbackOnly(DefaultTransactionStatus status)
Set the given transaction rollback-only. |
protected Object |
doSuspend(Object transaction)
Suspend the resources of the current transaction. |
DataSource |
getDataSource()
Return the JDBC DataSource that this instance manages transactions for. |
javax.persistence.EntityManagerFactory |
getEntityManagerFactory()
Return the EntityManagerFactory that this instance should manage transactions for. |
JpaDialect |
getJpaDialect()
Return the JPA dialect to use for this transaction manager. |
Map |
getJpaPropertyMap()
Allow Map access to the JPA properties to be passed to the persistence provider, with the option to add or override specific entries. |
protected boolean |
isExistingTransaction(Object transaction)
Check if the given transaction object indicates an existing transaction (that is, a transaction which has already started). |
void |
setDataSource(DataSource dataSource)
Set the JDBC DataSource that this instance should manage transactions for. |
void |
setEntityManagerFactory(javax.persistence.EntityManagerFactory emf)
Set the EntityManagerFactory that this instance should manage transactions for. |
void |
setJpaDialect(JpaDialect jpaDialect)
Set the JPA dialect to use for this transaction manager. |
void |
setJpaProperties(Properties jpaProperties)
Specify JPA properties, to be passed into EntityManagerFactory.createEntityManager(Map) (if any). |
void |
setJpaPropertyMap(Map jpaProperties)
Specify JPA properties as a Map, to be passed into EntityManagerFactory.createEntityManager(Map) (if any). |
protected boolean |
shouldCommitOnGlobalRollbackOnly()
This implementation returns "true": a JPA commit will properly handle transactions that have been marked rollback-only at a global level. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public JpaTransactionManager()
setEntityManagerFactory(javax.persistence.EntityManagerFactory)
public JpaTransactionManager(javax.persistence.EntityManagerFactory emf)
emf
- EntityManagerFactory to manage transactions forMethod Detail |
---|
public void setEntityManagerFactory(javax.persistence.EntityManagerFactory emf)
public javax.persistence.EntityManagerFactory getEntityManagerFactory()
public void setJpaProperties(Properties jpaProperties)
EntityManagerFactory.createEntityManager(Map)
(if any).
Can be populated with a String "value" (parsed via PropertiesEditor) or a "props" element in XML bean definitions.
EntityManagerFactory.createEntityManager(java.util.Map)
public void setJpaPropertyMap(Map jpaProperties)
EntityManagerFactory.createEntityManager(Map)
(if any).
Can be populated with a "map" or "props" element in XML bean definitions.
EntityManagerFactory.createEntityManager(java.util.Map)
public Map getJpaPropertyMap()
Useful for specifying entries directly, for example via "jpaPropertyMap[myKey]".
public void setDataSource(DataSource dataSource)
If the EntityManagerFactory uses a known DataSource as connection factory, the DataSource will be autodetected: You can still explictly specify the DataSource, but you don't need to in this case.
A transactional JDBC Connection for this DataSource will be provided to application code accessing this DataSource directly via DataSourceUtils or JdbcTemplate. The Connection will be taken from the JPA EntityManager.
Note that you need to use a JPA dialect for a specific JPA implementation to allow for exposing JPA transactions as JDBC transactions.
The DataSource specified here should be the target DataSource to manage transactions for, not a TransactionAwareDataSourceProxy. Only data access code may work with TransactionAwareDataSourceProxy, while the transaction manager needs to work on the underlying target DataSource. If there's nevertheless a TransactionAwareDataSourceProxy passed in, it will be unwrapped to extract its target DataSource.
EntityManagerFactoryInfo.getDataSource()
,
setJpaDialect(org.springframework.orm.jpa.JpaDialect)
,
TransactionAwareDataSourceProxy
,
DataSourceUtils
,
JdbcTemplate
public DataSource getDataSource()
public void setJpaDialect(JpaDialect jpaDialect)
If the EntityManagerFactory uses a known JpaDialect, it will be autodetected: You can still explictly specify the DataSource, but you don't need to in this case.
The dialect object can be used to retrieve the underlying JDBC connection and thus allows for exposing JPA transactions as JDBC transactions.
EntityManagerFactoryInfo.getJpaDialect()
,
JpaDialect.beginTransaction(javax.persistence.EntityManager, org.springframework.transaction.TransactionDefinition)
,
JpaDialect.getJdbcConnection(javax.persistence.EntityManager, boolean)
public JpaDialect getJpaDialect()
public void afterPropertiesSet()
afterPropertiesSet
in interface InitializingBean
protected Object doGetTransaction()
AbstractPlatformTransactionManager
The returned object will usually be specific to the concrete transaction manager implementation, carrying corresponding transaction state in a modifiable fashion. This object will be passed into the other template methods (e.g. doBegin and doCommit), either directly or as part of a DefaultTransactionStatus instance.
The returned object should contain information about any existing
transaction, that is, a transaction that has already started before the
current getTransaction
call on the transaction manager.
Consequently, a doGetTransaction
implementation will usually
look for an existing transaction and store corresponding state in the
returned transaction object.
doGetTransaction
in class AbstractPlatformTransactionManager
AbstractPlatformTransactionManager.doBegin(java.lang.Object, org.springframework.transaction.TransactionDefinition)
,
AbstractPlatformTransactionManager.doCommit(org.springframework.transaction.support.DefaultTransactionStatus)
,
AbstractPlatformTransactionManager.doRollback(org.springframework.transaction.support.DefaultTransactionStatus)
,
DefaultTransactionStatus.getTransaction()
protected boolean isExistingTransaction(Object transaction)
AbstractPlatformTransactionManager
The result will be evaluated according to the specified propagation behavior for the new transaction. An existing transaction might get suspended (in case of PROPAGATION_REQUIRES_NEW), or the new transaction might participate in the existing one (in case of PROPAGATION_REQUIRED).
The default implementation returns false
, assuming that
participating in existing transactions is generally not supported.
Subclasses are of course encouraged to provide such support.
isExistingTransaction
in class AbstractPlatformTransactionManager
transaction
- transaction object returned by doGetTransaction
AbstractPlatformTransactionManager.doGetTransaction()
protected void doBegin(Object transaction, TransactionDefinition definition)
AbstractPlatformTransactionManager
This method gets called when the transaction manager has decided to actually start a new transaction. Either there wasn't any transaction before, or the previous transaction has been suspended.
A special scenario is a nested transaction without savepoint: If
useSavepointForNestedTransaction()
returns "false", this method
will be called to start a nested transaction when necessary. In such a context,
there will be an active transaction: The implementation of this method has
to detect this and start an appropriate nested transaction.
doBegin
in class AbstractPlatformTransactionManager
transaction
- transaction object returned by doGetTransaction
definition
- TransactionDefinition instance, describing propagation
behavior, isolation level, read-only flag, timeout, and transaction nameprotected javax.persistence.EntityManager createEntityManagerForTransaction()
The default implementation checks whether the EntityManagerFactory is a Spring proxy and unwraps it first.
EntityManagerFactory.createEntityManager()
,
EntityManagerFactoryInfo.getNativeEntityManagerFactory()
protected Object doSuspend(Object transaction)
AbstractPlatformTransactionManager
The default implementation throws a TransactionSuspensionNotSupportedException, assuming that transaction suspension is generally not supported.
doSuspend
in class AbstractPlatformTransactionManager
transaction
- transaction object returned by doGetTransaction
AbstractPlatformTransactionManager.doResume(java.lang.Object, java.lang.Object)
protected void doResume(Object transaction, Object suspendedResources)
AbstractPlatformTransactionManager
The default implementation throws a TransactionSuspensionNotSupportedException, assuming that transaction suspension is generally not supported.
doResume
in class AbstractPlatformTransactionManager
transaction
- transaction object returned by doGetTransaction
suspendedResources
- the object that holds suspended resources,
as returned by doSuspendAbstractPlatformTransactionManager.doSuspend(java.lang.Object)
protected boolean shouldCommitOnGlobalRollbackOnly()
shouldCommitOnGlobalRollbackOnly
in class AbstractPlatformTransactionManager
AbstractPlatformTransactionManager.doCommit(org.springframework.transaction.support.DefaultTransactionStatus)
,
DefaultTransactionStatus.isGlobalRollbackOnly()
,
AbstractTransactionStatus.isLocalRollbackOnly()
,
TransactionStatus.setRollbackOnly()
,
UnexpectedRollbackException
,
UserTransaction.commit()
,
RollbackException
protected void doCommit(DefaultTransactionStatus status)
AbstractPlatformTransactionManager
An implementation does not need to check the "new transaction" flag or the rollback-only flag; this will already have been handled before. Usually, a straight commit will be performed on the transaction object contained in the passed-in status.
doCommit
in class AbstractPlatformTransactionManager
status
- the status representation of the transactionDefaultTransactionStatus.getTransaction()
protected void doRollback(DefaultTransactionStatus status)
AbstractPlatformTransactionManager
An implementation does not need to check the "new transaction" flag; this will already have been handled before. Usually, a straight rollback will be performed on the transaction object contained in the passed-in status.
doRollback
in class AbstractPlatformTransactionManager
status
- the status representation of the transactionDefaultTransactionStatus.getTransaction()
protected void doSetRollbackOnly(DefaultTransactionStatus status)
AbstractPlatformTransactionManager
The default implementation throws an IllegalTransactionStateException, assuming that participating in existing transactions is generally not supported. Subclasses are of course encouraged to provide such support.
doSetRollbackOnly
in class AbstractPlatformTransactionManager
status
- the status representation of the transactionprotected void doCleanupAfterCompletion(Object transaction)
AbstractPlatformTransactionManager
Called after doCommit
and doRollback
execution,
on any outcome. The default implementation does nothing.
Should not throw any exceptions but just issue warnings on errors.
doCleanupAfterCompletion
in class AbstractPlatformTransactionManager
transaction
- transaction object returned by doGetTransaction
|
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