java.lang.Object
- org.springframework.transaction.support.AbstractPlatformTransactionManager
- - org.springframework.orm.jpa.JpaTransactionManager

所有已实现的接口:
Serializable, Aware, BeanFactoryAware, InitializingBean, PlatformTransactionManager, ResourceTransactionManager, TransactionManager
```
public class JpaTransactionManager
extends AbstractPlatformTransactionManager
implements ResourceTransactionManager, BeanFactoryAware, InitializingBean
```
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 @PersistenceContext 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 the connection factory of the EntityManagerFactory, so you usually don't need to explicitly specify the "dataSource" property.
This transaction manager supports nested transactions via JDBC 3.0 Savepoints. The "nestedTransactionAllowed" flag defaults to false though, since nested transactions will just apply to the JDBC Connection, not to the JPA EntityManager and its cached entity objects and related context. 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.
从以下版本开始:
2.0
作者:
Juergen Hoeller
另请参阅:
setEntityManagerFactory(javax.persistence.EntityManagerFactory), setDataSource(javax.sql.DataSource), LocalEntityManagerFactoryBean, SharedEntityManagerBean, DataSourceUtils.getConnection(javax.sql.DataSource), DataSourceUtils.releaseConnection(java.sql.Connection, javax.sql.DataSource), JdbcTemplate, DataSourceTransactionManager, JtaTransactionManager, 序列化表格

字段概要
- 从类继承的字段 org.springframework.transaction.support.AbstractPlatformTransactionManager
  logger, SYNCHRONIZATION_ALWAYS, SYNCHRONIZATION_NEVER, SYNCHRONIZATION_ON_ACTUAL_TRANSACTION

构造器概要
构造器
构造器说明
JpaTransactionManager()
Create a new JpaTransactionManager instance.
JpaTransactionManager(EntityManagerFactory emf)
Create a new JpaTransactionManager instance.

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`void`	`afterPropertiesSet()`	Eagerly initialize the JPA dialect, creating a default one for the specified EntityManagerFactory if none set.
`protected void`	`closeEntityManagerAfterFailedBegin(org.springframework.orm.jpa.JpaTransactionManager.JpaTransactionObject txObject)`	Close the current transaction's EntityManager.
`protected 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.
`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<String,Object>`	`getJpaPropertyMap()`	Allow Map access to the JPA properties to be passed to the persistence provider, with the option to add or override specific entries.
`String`	`getPersistenceUnitName()`	Return the name of the persistence unit to manage transactions for, if any.
`Object`	`getResourceFactory()`	Return the resource factory that this transaction manager operates on, e.g. a JDBC DataSource or a JMS ConnectionFactory.
`protected boolean`	`isExistingTransaction(Object transaction)`	Check if the given transaction object indicates an existing transaction (that is, a transaction which has already started).
`protected EntityManagerFactory`	`obtainEntityManagerFactory()`	Obtain the EntityManagerFactory for actual use.
`void`	`setBeanFactory(BeanFactory beanFactory)`	Retrieves an EntityManagerFactory by persistence unit name, if none set explicitly.
`void`	`setDataSource(DataSource dataSource)`	Set the JDBC DataSource that this instance should manage transactions for.
`void`	`setEntityManagerFactory(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<String,?> jpaProperties)`	Specify JPA properties as a Map, to be passed into `EntityManagerFactory.createEntityManager(Map)` (if any).
`void`	`setPersistenceUnitName(String persistenceUnitName)`	Set the name of the persistence unit to manage transactions for.
`protected boolean`	`shouldCommitOnGlobalRollbackOnly()`	This implementation returns "true": a JPA commit will properly handle transactions that have been marked rollback-only at a global level.

从类继承的方法 org.springframework.transaction.support.AbstractPlatformTransactionManager
commit, determineTimeout, getDefaultTimeout, getTransaction, getTransactionSynchronization, invokeAfterCompletion, isFailEarlyOnGlobalRollbackOnly, isGlobalRollbackOnParticipationFailure, isNestedTransactionAllowed, isRollbackOnCommitFailure, isValidateExistingTransaction, newTransactionStatus, prepareForCommit, prepareSynchronization, prepareTransactionStatus, registerAfterCompletionWithExistingTransaction, resume, rollback, setDefaultTimeout, setFailEarlyOnGlobalRollbackOnly, setGlobalRollbackOnParticipationFailure, setNestedTransactionAllowed, setRollbackOnCommitFailure, setTransactionSynchronization, setTransactionSynchronizationName, setValidateExistingTransaction, suspend, triggerBeforeCommit, triggerBeforeCompletion, useSavepointForNestedTransaction

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.springframework.transaction.PlatformTransactionManager
commit, getTransaction, rollback

- 构造器详细资料
  - JpaTransactionManager
```
public JpaTransactionManager()
```
    Create a new JpaTransactionManager instance.
    An EntityManagerFactory has to be set to be able to use it.
    另请参阅:
    setEntityManagerFactory(javax.persistence.EntityManagerFactory)
  - JpaTransactionManager
```
public JpaTransactionManager(EntityManagerFactory emf)
```
    Create a new JpaTransactionManager instance.
    参数:
    emf - the EntityManagerFactory to manage transactions for
- 方法详细资料
  - setEntityManagerFactory
```
public void setEntityManagerFactory(@Nullable
                                    EntityManagerFactory emf)
```
    Set the EntityManagerFactory that this instance should manage transactions for.
    Alternatively, specify the persistence unit name of the target EntityManagerFactory. By default, a default EntityManagerFactory will be retrieved by finding a single unique bean of type EntityManagerFactory in the containing BeanFactory.
    另请参阅:
    setPersistenceUnitName(java.lang.String)
  - getEntityManagerFactory
```
@Nullable
public EntityManagerFactory getEntityManagerFactory()
```
    Return the EntityManagerFactory that this instance should manage transactions for.
  - obtainEntityManagerFactory
```
protected final EntityManagerFactory obtainEntityManagerFactory()
```
    Obtain the EntityManagerFactory for actual use.
    返回:
    the EntityManagerFactory (never null)
    抛出:
    IllegalStateException - in case of no EntityManagerFactory set
    从以下版本开始:
    5.0
  - setPersistenceUnitName
```
public void setPersistenceUnitName(@Nullable
                                   String persistenceUnitName)
```
    Set the name of the persistence unit to manage transactions for.
    This is an alternative to specifying the EntityManagerFactory by direct reference, resolving it by its persistence unit name instead. If no EntityManagerFactory and no persistence unit name have been specified, a default EntityManagerFactory will be retrieved by finding a single unique bean of type EntityManagerFactory.
    另请参阅:
    setEntityManagerFactory(javax.persistence.EntityManagerFactory)
  - getPersistenceUnitName
```
@Nullable
public String getPersistenceUnitName()
```
    Return the name of the persistence unit to manage transactions for, if any.
  - setJpaProperties
```
public void setJpaProperties(@Nullable
                             Properties jpaProperties)
```
    Specify JPA properties, to be passed into EntityManagerFactory.createEntityManager(Map) (if any).
    Can be populated with a String "value" (parsed via PropertiesEditor) or a "props" element in XML bean definitions.
    另请参阅:
    EntityManagerFactory.createEntityManager(java.util.Map)
  - setJpaPropertyMap
```
public void setJpaPropertyMap(@Nullable
                              Map<String,?> jpaProperties)
```
    Specify JPA properties as a Map, to be passed into EntityManagerFactory.createEntityManager(Map) (if any).
    Can be populated with a "map" or "props" element in XML bean definitions.
    另请参阅:
    EntityManagerFactory.createEntityManager(java.util.Map)
  - getJpaPropertyMap
```
public Map<String,Object> getJpaPropertyMap()
```
    Allow Map access to the JPA properties to be passed to the persistence provider, with the option to add or override specific entries.
    Useful for specifying entries directly, for example via "jpaPropertyMap[myKey]".
  - setDataSource
```
public void setDataSource(@Nullable
                          DataSource dataSource)
```
    Set the JDBC DataSource that this instance should manage transactions for. The DataSource should match the one used by the JPA EntityManagerFactory: for example, you could specify the same JNDI DataSource for both.
    If the EntityManagerFactory uses a known DataSource as its connection factory, the DataSource will be autodetected: You can still explicitly 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.
    另请参阅:
    EntityManagerFactoryInfo.getDataSource(), setJpaDialect(org.springframework.orm.jpa.JpaDialect), TransactionAwareDataSourceProxy, DataSourceUtils, JdbcTemplate
  - getDataSource
```
@Nullable
public DataSource getDataSource()
```
    Return the JDBC DataSource that this instance manages transactions for.
  - setJpaDialect
```
public void setJpaDialect(@Nullable
                          JpaDialect jpaDialect)
```
    Set the JPA dialect to use for this transaction manager. Used for vendor-specific transaction management and JDBC connection exposure.
    If the EntityManagerFactory uses a known JpaDialect, it will be autodetected: You can still explicitly 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.
    另请参阅:
    EntityManagerFactoryInfo.getJpaDialect(), JpaDialect.beginTransaction(javax.persistence.EntityManager, org.springframework.transaction.TransactionDefinition), JpaDialect.getJdbcConnection(javax.persistence.EntityManager, boolean)
  - getJpaDialect
```
public JpaDialect getJpaDialect()
```
    Return the JPA dialect to use for this transaction manager.
  - setBeanFactory
```
public void setBeanFactory(BeanFactory beanFactory)
                    throws BeansException
```
    Retrieves an EntityManagerFactory by persistence unit name, if none set explicitly. Falls back to a default EntityManagerFactory bean if no persistence unit specified.
    指定者:
    setBeanFactory 在接口中 BeanFactoryAware
    参数:
    beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.
    抛出:
    BeansException - in case of initialization errors
    另请参阅:
    setPersistenceUnitName(java.lang.String)
  - afterPropertiesSet
```
public void afterPropertiesSet()
```
    Eagerly initialize the JPA dialect, creating a default one for the specified EntityManagerFactory if none set. Auto-detect the EntityManagerFactory's DataSource, if any.
    指定者:
    afterPropertiesSet 在接口中 InitializingBean
  - getResourceFactory
```
public Object getResourceFactory()
```
    从接口复制的说明: ResourceTransactionManager
    Return the resource factory that this transaction manager operates on, e.g. a JDBC DataSource or a JMS ConnectionFactory.
    This target resource factory is usually used as resource key for TransactionSynchronizationManager's resource bindings per thread.
    指定者:
    getResourceFactory 在接口中 ResourceTransactionManager
    返回:
    the target resource factory (never null)
    另请参阅:
    TransactionSynchronizationManager.bindResource(java.lang.Object, java.lang.Object), TransactionSynchronizationManager.getResource(java.lang.Object)
  - doGetTransaction
```
protected Object doGetTransaction()
```
    从类复制的说明: AbstractPlatformTransactionManager
    Return a transaction object for the current transaction state.
    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.
    指定者:
    doGetTransaction 在类中 AbstractPlatformTransactionManager
    返回:
    the current transaction object
    另请参阅:
    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()
  - isExistingTransaction
```
protected boolean isExistingTransaction(Object transaction)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Check if the given transaction object indicates an existing transaction (that is, a transaction which has already started).
    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.
    覆盖:
    isExistingTransaction 在类中 AbstractPlatformTransactionManager
    参数:
    transaction - the transaction object returned by doGetTransaction
    返回:
    if there is an existing transaction
    另请参阅:
    AbstractPlatformTransactionManager.doGetTransaction()
  - doBegin
```
protected void doBegin(Object transaction,
                       TransactionDefinition definition)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Begin a new transaction with semantics according to the given transaction definition. Does not have to care about applying the propagation behavior, as this has already been handled by this abstract manager.
    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.
    指定者:
    doBegin 在类中 AbstractPlatformTransactionManager
    参数:
    transaction - the transaction object returned by doGetTransaction
    definition - a TransactionDefinition instance, describing propagation behavior, isolation level, read-only flag, timeout, and transaction name
  - createEntityManagerForTransaction
```
protected EntityManager createEntityManagerForTransaction()
```
    Create a JPA EntityManager to be used for a transaction.
    The default implementation checks whether the EntityManagerFactory is a Spring proxy and unwraps it first.
    另请参阅:
    EntityManagerFactory.createEntityManager(), EntityManagerFactoryInfo.getNativeEntityManagerFactory()
  - closeEntityManagerAfterFailedBegin
```
protected void closeEntityManagerAfterFailedBegin(org.springframework.orm.jpa.JpaTransactionManager.JpaTransactionObject txObject)
```
    Close the current transaction's EntityManager. Called after a transaction begin attempt failed.
    参数:
    txObject - the current transaction
  - doSuspend
```
protected Object doSuspend(Object transaction)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Suspend the resources of the current transaction. Transaction synchronization will already have been suspended.
    The default implementation throws a TransactionSuspensionNotSupportedException, assuming that transaction suspension is generally not supported.
    覆盖:
    doSuspend 在类中 AbstractPlatformTransactionManager
    参数:
    transaction - the transaction object returned by doGetTransaction
    返回:
    an object that holds suspended resources (will be kept unexamined for passing it into doResume)
    另请参阅:
    AbstractPlatformTransactionManager.doResume(java.lang.Object, java.lang.Object)
  - doResume
```
protected void doResume(@Nullable
                        Object transaction,
                        Object suspendedResources)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Resume the resources of the current transaction. Transaction synchronization will be resumed afterwards.
    The default implementation throws a TransactionSuspensionNotSupportedException, assuming that transaction suspension is generally not supported.
    覆盖:
    doResume 在类中 AbstractPlatformTransactionManager
    参数:
    transaction - the transaction object returned by doGetTransaction
    suspendedResources - the object that holds suspended resources, as returned by doSuspend
    另请参阅:
    AbstractPlatformTransactionManager.doSuspend(java.lang.Object)
  - shouldCommitOnGlobalRollbackOnly
```
protected boolean shouldCommitOnGlobalRollbackOnly()
```
    This implementation returns "true": a JPA commit will properly handle transactions that have been marked rollback-only at a global level.
    覆盖:
    shouldCommitOnGlobalRollbackOnly 在类中 AbstractPlatformTransactionManager
    另请参阅:
    AbstractPlatformTransactionManager.doCommit(org.springframework.transaction.support.DefaultTransactionStatus), DefaultTransactionStatus.isGlobalRollbackOnly(), AbstractTransactionStatus.isLocalRollbackOnly(), TransactionExecution.setRollbackOnly(), UnexpectedRollbackException, UserTransaction.commit(), RollbackException
  - doCommit
```
protected void doCommit(DefaultTransactionStatus status)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Perform an actual commit of the given transaction.
    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.
    指定者:
    doCommit 在类中 AbstractPlatformTransactionManager
    参数:
    status - the status representation of the transaction
    另请参阅:
    DefaultTransactionStatus.getTransaction()
  - doRollback
```
protected void doRollback(DefaultTransactionStatus status)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Perform an actual rollback of the given transaction.
    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.
    指定者:
    doRollback 在类中 AbstractPlatformTransactionManager
    参数:
    status - the status representation of the transaction
    另请参阅:
    DefaultTransactionStatus.getTransaction()
  - doSetRollbackOnly
```
protected void doSetRollbackOnly(DefaultTransactionStatus status)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Set the given transaction rollback-only. Only called on rollback if the current transaction participates in an existing one.
    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.
    覆盖:
    doSetRollbackOnly 在类中 AbstractPlatformTransactionManager
    参数:
    status - the status representation of the transaction
  - doCleanupAfterCompletion
```
protected void doCleanupAfterCompletion(Object transaction)
```
    从类复制的说明: AbstractPlatformTransactionManager
    Cleanup resources after transaction completion.
    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.
    覆盖:
    doCleanupAfterCompletion 在类中 AbstractPlatformTransactionManager
    参数:
    transaction - the transaction object returned by doGetTransaction

构造器	说明
`JpaTransactionManager()`	Create a new JpaTransactionManager instance.
`JpaTransactionManager(EntityManagerFactory emf)`	Create a new JpaTransactionManager instance.

类 JpaTransactionManager

字段概要

从类继承的字段 org.springframework.transaction.support.AbstractPlatformTransactionManager

构造器概要

方法概要

从类继承的方法 org.springframework.transaction.support.AbstractPlatformTransactionManager

从类继承的方法 java.lang.Object

从接口继承的方法 org.springframework.transaction.PlatformTransactionManager

构造器详细资料

JpaTransactionManager

JpaTransactionManager

方法详细资料

setEntityManagerFactory

getEntityManagerFactory

obtainEntityManagerFactory

setPersistenceUnitName

getPersistenceUnitName

setJpaProperties

setJpaPropertyMap

getJpaPropertyMap

setDataSource

getDataSource

setJpaDialect

getJpaDialect

setBeanFactory

afterPropertiesSet

getResourceFactory

doGetTransaction

isExistingTransaction

doBegin

createEntityManagerForTransaction

closeEntityManagerAfterFailedBegin

doSuspend

doResume

shouldCommitOnGlobalRollbackOnly

doCommit

doRollback

doSetRollbackOnly

doCleanupAfterCompletion