org.springframework.jca.support

Class LocalConnectionFactoryBean

java.lang.Object

org.springframework.jca.support.LocalConnectionFactoryBean

All Implemented Interfaces:

FactoryBean<Object>, InitializingBean

public class LocalConnectionFactoryBean
extends Object
implements FactoryBean<Object>, InitializingBean

FactoryBean that creates a local JCA connection factory in "non-managed" mode (as defined by the Java Connector Architecture specification). This is a direct alternative to a JndiObjectFactoryBean definition that obtains a connection factory handle from a J2EE server's naming environment.

The type of the connection factory is dependent on the actual connector: the connector can either expose its native API (such as a JDBC DataSource or a JMS ConnectionFactory) or follow the standard Common Client Interface (CCI), as defined by the JCA spec. The exposed interface in the CCI case is ConnectionFactory.

In order to use this FactoryBean, you must specify the connector's "managedConnectionFactory" (usually configured as separate JavaBean), which will be used to create the actual connection factory reference as exposed to the application. Optionally, you can also specify a "connectionManager", in order to use a custom ConnectionManager instead of the connector's default.

NOTE: In non-managed mode, a connector is not deployed on an application server, or more specificially not interacting with an application server. Consequently, it cannot use a J2EE server's system contracts: connection management, transaction management, and security management. A custom ConnectionManager implementation has to be used for applying those services in conjunction with a standalone transaction coordinator etc.

The connector will use a local ConnectionManager (included in the connector) by default, which cannot participate in global transactions due to the lack of XA enlistment. You need to specify an XA-capable ConnectionManager in order to make the connector interact with an XA transaction coordinator. Alternatively, simply use the native local transaction facilities of the exposed API (e.g. CCI local transactions), or use a corresponding implementation of Spring's PlatformTransactionManager SPI (e.g. CciLocalTransactionManager) to drive local transactions.

Since:

1.2

Author:

Juergen Hoeller

See Also:

setManagedConnectionFactory(javax.resource.spi.ManagedConnectionFactory), setConnectionManager(javax.resource.spi.ConnectionManager), ConnectionFactory, Connection.getLocalTransaction(), CciLocalTransactionManager

Constructor Summary

Constructors

Constructor and Description
LocalConnectionFactoryBean()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet() Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.
Object	getObject() Return an instance (possibly shared or independent) of the object managed by this factory.
Class<?>	getObjectType() Return the type of object that this FactoryBean creates, or null if not known in advance.
boolean	isSingleton() Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?
void	setConnectionManager(ConnectionManager connectionManager) Set the JCA ConnectionManager that should be used to create the desired connection factory.
void	setManagedConnectionFactory(ManagedConnectionFactory managedConnectionFactory) Set the JCA ManagerConnectionFactory that should be used to create the desired connection factory.

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalConnectionFactoryBean

public LocalConnectionFactoryBean()

Method Detail

setManagedConnectionFactory

public void setManagedConnectionFactory(ManagedConnectionFactory managedConnectionFactory)

Set the JCA ManagerConnectionFactory that should be used to create the desired connection factory.

The ManagerConnectionFactory will usually be set up as separate bean (potentially as inner bean), populated with JavaBean properties: a ManagerConnectionFactory is encouraged to follow the JavaBean pattern by the JCA specification, analogous to a JDBC DataSource and a JDO PersistenceManagerFactory.

Note that the ManagerConnectionFactory implementation might expect a reference to its JCA 1.5 ResourceAdapter, expressed through the ResourceAdapterAssociation interface. Simply inject the corresponding ResourceAdapter instance into its "resourceAdapter" bean property in this case, before passing the ManagerConnectionFactory into this LocalConnectionFactoryBean.

See Also:

ManagedConnectionFactory.createConnectionFactory()

setConnectionManager

public void setConnectionManager(ConnectionManager connectionManager)

Set the JCA ConnectionManager that should be used to create the desired connection factory.

A ConnectionManager implementation for local usage is often included with a JCA connector. Such an included ConnectionManager might be set as default, with no need to explicitly specify one.

See Also:

ManagedConnectionFactory.createConnectionFactory(javax.resource.spi.ConnectionManager)

afterPropertiesSet

public void afterPropertiesSet()
                        throws ResourceException

Description copied from interface: InitializingBean

Invoked by the containing BeanFactory after it has set all bean properties and satisfied BeanFactoryAware, ApplicationContextAware etc.

This method allows the bean instance to perform validation of its overall configuration and final initialization when all bean properties have been set.

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

ResourceException

getObject

public Object getObject()

Description copied from interface: FactoryBean

Return an instance (possibly shared or independent) of the object managed by this factory.

As with a BeanFactory, this allows support for both the Singleton and Prototype design pattern.

If this FactoryBean is not fully initialized yet at the time of the call (for example because it is involved in a circular reference), throw a corresponding FactoryBeanNotInitializedException.

As of Spring 2.0, FactoryBeans are allowed to return null objects. The factory will consider this as normal value to be used; it will not throw a FactoryBeanNotInitializedException in this case anymore. FactoryBean implementations are encouraged to throw FactoryBeanNotInitializedException themselves now, as appropriate.

Specified by:

getObject in interface FactoryBean<Object>

Returns:

an instance of the bean (can be null)

See Also:

FactoryBeanNotInitializedException

getObjectType

public Class<?> getObjectType()

Description copied from interface: FactoryBean

Return the type of object that this FactoryBean creates, or null if not known in advance.

This allows one to check for specific types of beans without instantiating objects, for example on autowiring.

In the case of implementations that are creating a singleton object, this method should try to avoid singleton creation as far as possible; it should rather estimate the type in advance. For prototypes, returning a meaningful type here is advisable too.

This method can be called before this FactoryBean has been fully initialized. It must not rely on state created during initialization; of course, it can still use such state if available.

NOTE: Autowiring will simply ignore FactoryBeans that return null here. Therefore it is highly recommended to implement this method properly, using the current state of the FactoryBean.

Specified by:

getObjectType in interface FactoryBean<Object>

Returns:

the type of object that this FactoryBean creates, or null if not known at the time of the call

See Also:

ListableBeanFactory.getBeansOfType(java.lang.Class<T>)

isSingleton

public boolean isSingleton()

Description copied from interface: FactoryBean

Is the object managed by this factory a singleton? That is, will FactoryBean.getObject() always return the same object (a reference that can be cached)?

NOTE: If a FactoryBean indicates to hold a singleton object, the object returned from getObject() might get cached by the owning BeanFactory. Hence, do not return true unless the FactoryBean always exposes the same reference.

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory; usually, it has to be defined as singleton there.

NOTE: This method returning false does not necessarily indicate that returned objects are independent instances. An implementation of the extended SmartFactoryBean interface may explicitly indicate independent instances through its SmartFactoryBean.isPrototype() method. Plain FactoryBean implementations which do not implement this extended interface are simply assumed to always return independent instances if the isSingleton() implementation returns false.

Specified by:

isSingleton in interface FactoryBean<Object>

Returns:

whether the exposed object is a singleton

See Also:

FactoryBean.getObject(), SmartFactoryBean.isPrototype()