org.springframework.jndi

Class JndiObjectFactoryBean

java.lang.Object

org.springframework.jndi.JndiAccessor

org.springframework.jndi.JndiLocatorSupport

org.springframework.jndi.JndiObjectLocator

org.springframework.jndi.JndiObjectFactoryBean

All Implemented Interfaces:

org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanClassLoaderAware, org.springframework.beans.factory.FactoryBean<Object>, org.springframework.beans.factory.InitializingBean

public class JndiObjectFactoryBean
extends JndiObjectLocator
implements org.springframework.beans.factory.FactoryBean<Object>, org.springframework.beans.factory.BeanClassLoaderAware

FactoryBean that looks up a JNDI object. Exposes the object found in JNDI for bean references, e.g. for data access object's "dataSource" property in case of a DataSource.

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

The default behavior is to look up the JNDI object on startup and cache it. This can be customized through the "lookupOnStartup" and "cache" properties, using a JndiObjectTargetSource underneath. Note that you need to specify a "proxyInterface" in such a scenario, since the actual JNDI object type is not known in advance.

Of course, bean classes in a Spring environment may lookup e.g. a DataSource from JNDI themselves. This class simply enables central configuration of the JNDI name, and easy switching to non-JNDI alternatives. The latter is particularly convenient for test setups, reuse in standalone clients, etc.

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

Since:

22.05.2003

Author:

Juergen Hoeller

See Also:

setProxyInterface(java.lang.Class), setLookupOnStartup(boolean), setCache(boolean), JndiObjectTargetSource

Field Summary

Fields inherited from class org.springframework.jndi.JndiLocatorSupport

CONTAINER_PREFIX

Fields inherited from class org.springframework.jndi.JndiAccessor

logger

Constructor Summary

Constructors

Constructor and Description
JndiObjectFactoryBean()

Method Summary

Methods

Modifier and Type	Method and Description
void	afterPropertiesSet() Look up the JNDI object and store it.
protected Class	createCompositeInterface(Class[] interfaces) Create a composite interface Class for the given interfaces, implementing the given interfaces in one single Class.
Object	getObject() Return the singleton JNDI object.
Class<?>	getObjectType()
boolean	isSingleton()
protected Object	lookupWithFallback() Lookup variant that that returns the specified "defaultObject" (if any) in case of lookup failure.
void	setBeanClassLoader(ClassLoader classLoader)
void	setCache(boolean cache) Set whether to cache the JNDI object once it has been located.
void	setDefaultObject(Object defaultObject) Specify a default object to fall back to if the JNDI lookup fails.
void	setExposeAccessContext(boolean exposeAccessContext) Set whether to expose the JNDI environment context for all access to the target object, i.e.
void	setLookupOnStartup(boolean lookupOnStartup) Set whether to look up the JNDI object on startup.
void	setProxyInterface(Class proxyInterface) Specify the proxy interface to use for the JNDI object.
void	setProxyInterfaces(Class[] proxyInterfaces) Specify multiple proxy interfaces to use for the JNDI object.

Methods inherited from class org.springframework.jndi.JndiObjectLocator

getExpectedType, getJndiName, lookup, setExpectedType, setJndiName

Methods inherited from class org.springframework.jndi.JndiLocatorSupport

convertJndiName, isResourceRef, lookup, lookup, setResourceRef

Methods inherited from class org.springframework.jndi.JndiAccessor

getJndiEnvironment, getJndiTemplate, setJndiEnvironment, setJndiTemplate

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

setProxyInterface

public void setProxyInterface(Class proxyInterface)

Specify the proxy interface to use for the JNDI object.

Typically used in conjunction with "lookupOnStartup"=false and/or "cache"=false. Needs to be specified because the actual JNDI object type is not known in advance in case of a lazy lookup.

See Also:

setProxyInterfaces(java.lang.Class[]), setLookupOnStartup(boolean), setCache(boolean)

setProxyInterfaces

public void setProxyInterfaces(Class[] proxyInterfaces)

Specify multiple proxy interfaces to use for the JNDI object.

Typically used in conjunction with "lookupOnStartup"=false and/or "cache"=false. Note that proxy interfaces will be autodetected from a specified "expectedType", if necessary.

See Also:

JndiObjectLocator.setExpectedType(java.lang.Class<?>), setLookupOnStartup(boolean), setCache(boolean)

setLookupOnStartup

public void setLookupOnStartup(boolean lookupOnStartup)

Set whether to look up the JNDI object on startup. Default is "true".

Can be turned off to allow for late availability of the JNDI object. In this case, the JNDI object will be fetched on first access.

For a lazy lookup, a proxy interface needs to be specified.

See Also:

setProxyInterface(java.lang.Class), setCache(boolean)

setCache

public void setCache(boolean cache)

Set whether to cache the JNDI object once it has been located. Default is "true".

Can be turned off to allow for hot redeployment of JNDI objects. In this case, the JNDI object will be fetched for each invocation.

For hot redeployment, a proxy interface needs to be specified.

See Also:

setProxyInterface(java.lang.Class), setLookupOnStartup(boolean)

setExposeAccessContext

public void setExposeAccessContext(boolean exposeAccessContext)

Set whether to expose the JNDI environment context for all access to the target object, i.e. for all method invocations on the exposed object reference.

Default is "false", i.e. to only expose the JNDI context for object lookup. Switch this flag to "true" in order to expose the JNDI environment (including the authorization context) for each method invocation, as needed by WebLogic for JNDI-obtained factories (e.g. JDBC DataSource, JMS ConnectionFactory) with authorization requirements.

setDefaultObject

public void setDefaultObject(Object defaultObject)

Specify a default object to fall back to if the JNDI lookup fails. Default is none.

This can be an arbitrary bean reference or literal value. It is typically used for literal values in scenarios where the JNDI environment might define specific config settings but those are not required to be present.

Note: This is only supported for lookup on startup.

See Also:

setLookupOnStartup(boolean)

setBeanClassLoader

public void setBeanClassLoader(ClassLoader classLoader)

Specified by:

setBeanClassLoader in interface org.springframework.beans.factory.BeanClassLoaderAware

afterPropertiesSet

public void afterPropertiesSet()
                        throws IllegalArgumentException,
                               NamingException

Look up the JNDI object and store it.

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Overrides:

afterPropertiesSet in class JndiObjectLocator

Throws:

IllegalArgumentException

NamingException

lookupWithFallback

protected Object lookupWithFallback()
                             throws NamingException

Lookup variant that that returns the specified "defaultObject" (if any) in case of lookup failure.

Returns:

the located object, or the "defaultObject" as fallback

Throws:

NamingException - in case of lookup failure without fallback

See Also:

setDefaultObject(java.lang.Object)

getObject

public Object getObject()

Return the singleton JNDI object.

Specified by:

getObject in interface org.springframework.beans.factory.FactoryBean<Object>

getObjectType

public Class<?> getObjectType()

Specified by:

getObjectType in interface org.springframework.beans.factory.FactoryBean<Object>

isSingleton

public boolean isSingleton()

Specified by:

isSingleton in interface org.springframework.beans.factory.FactoryBean<Object>

createCompositeInterface

protected Class createCompositeInterface(Class[] interfaces)

Create a composite interface Class for the given interfaces, implementing the given interfaces in one single Class.

The default implementation builds a JDK proxy class for the given interfaces.

Parameters:

interfaces - the interfaces to merge

Returns:

the merged interface as Class

See Also:

Proxy.getProxyClass(java.lang.ClassLoader, java.lang.Class<?>...)