org.springframework.jndi
Class JndiObjectFactoryBean

java.lang.Object
  org.springframework.jndi.AbstractJndiLocator
      org.springframework.jndi.JndiObjectFactoryBean

All Implemented Interfaces:

FactoryBean, InitializingBean

public class JndiObjectFactoryBean

extends AbstractJndiLocator

implements FactoryBean

FactoryBean that looks up a JNDI object. Behaves like the object when used as bean reference, e.g. for JdbcTemplate's dataSource property.

The typical usage will be to register this as singleton factory (e.g. for a certain JNDI DataSource) in an application context, and give bean references to application services that need it.

Of course, service implementations can lookup e.g. a DataSource from JNDI themselves, but this class enables central configuration of the JNDI name, and easy switching to non-JNDI replacements. The latter can be used for test setups, standalone clients, etc.

Note that switching to e.g. DriverManagerDataSource is just a matter of configuration: replace the definition of this FactoryBean with a DriverManagerDataSource definition!

Since:

22.05.2003

Author:

Juergen Hoeller

See Also:

JdbcAccessor.setDataSource(javax.sql.DataSource)

Field Summary

Fields inherited from class org.springframework.jndi.AbstractJndiLocator

CONTAINER_PREFIX, logger

Constructor Summary

JndiObjectFactoryBean()

Method Summary

java.lang.Object	getObject() Return the singleton JNDI object.
java.lang.Class	getObjectType() Return the type of object that this FactoryBean creates, or null if not known in advance.
boolean	isSingleton() Is the bean managed by this factory a singleton or a prototype? That is, will getObject() always return the same object?
protected void	located(java.lang.Object jndiObject) Subclasses must implement this to cache the object this class has obtained from JNDI.

Methods inherited from class org.springframework.jndi.AbstractJndiLocator

afterPropertiesSet, getJndiEnvironment, getJndiName, getJndiTemplate, isResourceRef, setJndiEnvironment, setJndiName, setJndiTemplate, setResourceRef

Methods inherited from class java.lang.Object

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

Constructor Detail

JndiObjectFactoryBean

public JndiObjectFactoryBean()

Method Detail

located

protected void located(java.lang.Object jndiObject)

Description copied from class: AbstractJndiLocator

Subclasses must implement this to cache the object this class has obtained from JNDI.

Specified by:

located in class AbstractJndiLocator

Parameters:

jndiObject - object successfully retrieved from JNDI

getObject

public java.lang.Object getObject()

Return the singleton JNDI object.

Specified by:

getObject in interface FactoryBean

Returns:

an instance of the bean (should never be null)

getObjectType

public java.lang.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 to check for specific types of beans without instantiating objects, e.g. on autowiring.

For a singleton, this can simply return getObject().getClass(), or even null, as autowiring will always check the actual objects for singletons. For prototypes, returning a meaningful type here is highly advisable, as autowiring will simply ignore them else.

Specified by:

getObjectType in interface FactoryBean

Returns:

the type of object that this FactoryBean creates, or null

See Also:

ListableBeanFactory.getBeansOfType(java.lang.Class, boolean, boolean)

isSingleton

public boolean isSingleton()

Description copied from interface: FactoryBean

Is the bean managed by this factory a singleton or a prototype? That is, will getObject() always return the same object?

The singleton status of the FactoryBean itself will generally be provided by the owning BeanFactory.

Specified by:

isSingleton in interface FactoryBean

Returns:

if this bean is a singleton