org.springframework.transaction.interceptor

Class TransactionProxyFactoryBean

java.lang.Object

org.springframework.aop.framework.ProxyConfig

org.springframework.aop.framework.AbstractSingletonProxyFactoryBean

org.springframework.transaction.interceptor.TransactionProxyFactoryBean

All Implemented Interfaces:

Serializable, Aware, BeanClassLoaderAware, BeanFactoryAware, FactoryBean<Object>, InitializingBean

public class TransactionProxyFactoryBean
extends AbstractSingletonProxyFactoryBean
implements BeanFactoryAware

Proxy factory bean for simplified declarative transaction handling. This is a convenient alternative to a standard AOP ProxyFactoryBean with a separate TransactionInterceptor definition.

HISTORICAL NOTE: This class was originally designed to cover the typical case of declarative transaction demarcation: namely, wrapping a singleton target object with a transactional proxy, proxying all the interfaces that the target implements. However, in Spring versions 2.0 and beyond, the functionality provided here is superseded by the more convenient tx: XML namespace. See the declarative transaction management section of the Spring reference documentation to understand the modern options for managing transactions in Spring applications. For these reasons, users should favor of the tx: XML namespace as well as the @Transactional and @EnableTransactionManagement annotations.

There are three main properties that need to be specified:

• "transactionManager": the PlatformTransactionManager implementation to use (for example, a JtaTransactionManager instance)
• "target": the target object that a transactional proxy should be created for
• "transactionAttributes": the transaction attributes (for example, propagation behavior and "readOnly" flag) per target method name (or method name pattern)

If the "transactionManager" property is not set explicitly and this FactoryBean is running in a ListableBeanFactory, a single matching bean of type PlatformTransactionManager will be fetched from the BeanFactory.

In contrast to TransactionInterceptor, the transaction attributes are specified as properties, with method names as keys and transaction attribute descriptors as values. Method names are always applied to the target class.

Internally, a TransactionInterceptor instance is used, but the user of this class does not have to care. Optionally, a method pointcut can be specified to cause conditional invocation of the underlying TransactionInterceptor.

The "preInterceptors" and "postInterceptors" properties can be set to add additional interceptors to the mix, like PerformanceMonitorInterceptor.

HINT: This class is often used with parent / child bean definitions. Typically, you will define the transaction manager and default transaction attributes (for method name patterns) in an abstract parent bean definition, deriving concrete child bean definitions for specific target objects. This reduces the per-bean definition effort to a minimum.

 <bean id="baseTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"
     abstract="true">
   <property name="transactionManager" ref="transactionManager"/>
   <property name="transactionAttributes">
     <props>
       <prop key="insert*">PROPAGATION_REQUIRED</prop>
       <prop key="update*">PROPAGATION_REQUIRED</prop>
       <prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
     </props>
   </property>
 </bean>

 <bean id="myProxy" parent="baseTransactionProxy">
   <property name="target" ref="myTarget"/>
 </bean>

 <bean id="yourProxy" parent="baseTransactionProxy">
   <property name="target" ref="yourTarget"/>
 </bean>

Since:

21.08.2003

Author:

Juergen Hoeller, Dmitriy Kopylenko, Rod Johnson, Chris Beams

See Also:

setTransactionManager(org.springframework.transaction.PlatformTransactionManager), AbstractSingletonProxyFactoryBean.setTarget(java.lang.Object), setTransactionAttributes(java.util.Properties), TransactionInterceptor, ProxyFactoryBean, Serialized Form

Constructor Summary

Constructors

Constructor and Description
TransactionProxyFactoryBean()

Method Summary

Modifier and Type	Method and Description
protected Object	createMainInterceptor() Creates an advisor for this FactoryBean's TransactionInterceptor.
protected void	postProcessProxyFactory(ProxyFactory proxyFactory) As of 4.2, this method adds TransactionalProxy to the set of proxy interfaces in order to avoid re-processing of transaction metadata.
void	setBeanFactory(BeanFactory beanFactory) This callback is optional: If running in a BeanFactory and no transaction manager has been set explicitly, a single matching bean of type PlatformTransactionManager will be fetched from the BeanFactory.
void	setPointcut(Pointcut pointcut) Set a pointcut, i.e a bean that can cause conditional invocation of the TransactionInterceptor depending on method and attributes passed.
void	setTransactionAttributes(Properties transactionAttributes) Set properties with method names as keys and transaction attribute descriptors (parsed via TransactionAttributeEditor) as values: e.g.
void	setTransactionAttributeSource(TransactionAttributeSource transactionAttributeSource) Set the transaction attribute source which is used to find transaction attributes.
void	setTransactionManager(PlatformTransactionManager transactionManager) Set the default transaction manager.

Methods inherited from class org.springframework.aop.framework.AbstractSingletonProxyFactoryBean

afterPropertiesSet, createTargetSource, getObject, getObjectType, isSingleton, setAdvisorAdapterRegistry, setBeanClassLoader, setPostInterceptors, setPreInterceptors, setProxyClassLoader, setProxyInterfaces, setTarget

Methods inherited from class org.springframework.aop.framework.ProxyConfig

copyFrom, isExposeProxy, isFrozen, isOpaque, isOptimize, isProxyTargetClass, setExposeProxy, setFrozen, setOpaque, setOptimize, setProxyTargetClass, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TransactionProxyFactoryBean

public TransactionProxyFactoryBean()

Method Detail

setTransactionManager

public void setTransactionManager(PlatformTransactionManager transactionManager)

Set the default transaction manager. This will perform actual transaction management: This class is just a way of invoking it.

See Also:

TransactionAspectSupport.setTransactionManager(org.springframework.transaction.PlatformTransactionManager)

setTransactionAttributes

public void setTransactionAttributes(Properties transactionAttributes)

Set properties with method names as keys and transaction attribute descriptors (parsed via TransactionAttributeEditor) as values: e.g. key = "myMethod", value = "PROPAGATION_REQUIRED,readOnly".

Note: Method names are always applied to the target class, no matter if defined in an interface or the class itself.

Internally, a NameMatchTransactionAttributeSource will be created from the given properties.

See Also:

setTransactionAttributeSource(org.springframework.transaction.interceptor.TransactionAttributeSource), TransactionAspectSupport.setTransactionAttributes(java.util.Properties), TransactionAttributeEditor, NameMatchTransactionAttributeSource

setTransactionAttributeSource

public void setTransactionAttributeSource(TransactionAttributeSource transactionAttributeSource)

Set the transaction attribute source which is used to find transaction attributes. If specifying a String property value, a PropertyEditor will create a MethodMapTransactionAttributeSource from the value.

See Also:

setTransactionAttributes(java.util.Properties), TransactionAspectSupport.setTransactionAttributeSource(org.springframework.transaction.interceptor.TransactionAttributeSource), TransactionAttributeSourceEditor, MethodMapTransactionAttributeSource, NameMatchTransactionAttributeSource, AnnotationTransactionAttributeSource

setPointcut

public void setPointcut(Pointcut pointcut)

Set a pointcut, i.e a bean that can cause conditional invocation of the TransactionInterceptor depending on method and attributes passed. Note: Additional interceptors are always invoked.

See Also:

AbstractSingletonProxyFactoryBean.setPreInterceptors(java.lang.Object[]), AbstractSingletonProxyFactoryBean.setPostInterceptors(java.lang.Object[])

setBeanFactory

public void setBeanFactory(BeanFactory beanFactory)

This callback is optional: If running in a BeanFactory and no transaction manager has been set explicitly, a single matching bean of type PlatformTransactionManager will be fetched from the BeanFactory.

Specified by:

setBeanFactory in interface BeanFactoryAware

Parameters:

beanFactory - owning BeanFactory (never null). The bean can immediately call methods on the factory.

See Also:

BeanFactory.getBean(Class), PlatformTransactionManager

createMainInterceptor

protected Object createMainInterceptor()

Creates an advisor for this FactoryBean's TransactionInterceptor.

Specified by:

createMainInterceptor in class AbstractSingletonProxyFactoryBean

postProcessProxyFactory

protected void postProcessProxyFactory(ProxyFactory proxyFactory)

As of 4.2, this method adds TransactionalProxy to the set of proxy interfaces in order to avoid re-processing of transaction metadata.

Overrides:

postProcessProxyFactory in class AbstractSingletonProxyFactoryBean

Parameters:

proxyFactory - the AOP ProxyFactory about to be used