org.springframework.jndi

Class JndiObjectTargetSource

java.lang.Object

org.springframework.jndi.JndiAccessor

org.springframework.jndi.JndiLocatorSupport

org.springframework.jndi.JndiObjectLocator

org.springframework.jndi.JndiObjectTargetSource

All Implemented Interfaces:

org.springframework.aop.TargetClassAware, org.springframework.aop.TargetSource, org.springframework.beans.factory.InitializingBean

public class JndiObjectTargetSource
extends JndiObjectLocator
implements org.springframework.aop.TargetSource

AOP TargetSource that provides configurable JNDI lookups for getTarget() calls.

Can be used as alternative to JndiObjectFactoryBean, to allow for relocating a JNDI object lazily or for each operation (see "lookupOnStartup" and "cache" properties). This is particularly useful during development, as it allows for hot restarting of the JNDI server (for example, a remote JMS server).

Example:

 <bean id="queueConnectionFactoryTarget" class="org.springframework.jndi.JndiObjectTargetSource">
   <property name="jndiName" value="JmsQueueConnectionFactory"/>
   <property name="lookupOnStartup" value="false"/>
 </bean>

 <bean id="queueConnectionFactory" class="org.springframework.aop.framework.ProxyFactoryBean">
   <property name="proxyInterfaces" value="javax.jms.QueueConnectionFactory"/>
   <property name="targetSource" ref="queueConnectionFactoryTarget"/>
 </bean>

A createQueueConnection call on the "queueConnectionFactory" proxy will cause a lazy JNDI lookup for "JmsQueueConnectionFactory" and a subsequent delegating call to the retrieved QueueConnectionFactory's createQueueConnection.

Alternatively, use a JndiObjectFactoryBean with a "proxyInterface". "lookupOnStartup" and "cache" can then be specified on the JndiObjectFactoryBean, creating a JndiObjectTargetSource underneath (instead of defining separate ProxyFactoryBean and JndiObjectTargetSource beans).

Since:

1.1

Author:

Juergen Hoeller

See Also:

setLookupOnStartup(boolean), setCache(boolean), AdvisedSupport.setTargetSource(org.springframework.aop.TargetSource), JndiObjectFactoryBean.setProxyInterface(java.lang.Class<?>)

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
JndiObjectTargetSource()

Method Summary

Modifier and Type	Method and Description
void	afterPropertiesSet()
Object	getTarget()
Class<?>	getTargetClass()
boolean	isStatic()
void	releaseTarget(Object target)
void	setCache(boolean cache) Set whether to cache the JNDI object once it has been located.
void	setLookupOnStartup(boolean lookupOnStartup) Set whether to look up the JNDI object on startup.

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

JndiObjectTargetSource

public JndiObjectTargetSource()

Method Detail

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.

See Also:

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.

See Also:

setLookupOnStartup(boolean)

afterPropertiesSet

public void afterPropertiesSet()
                        throws NamingException

Specified by:

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

Overrides:

afterPropertiesSet in class JndiObjectLocator

Throws:

NamingException

getTargetClass

@Nullable
public Class<?> getTargetClass()

Specified by:

getTargetClass in interface org.springframework.aop.TargetClassAware

Specified by:

getTargetClass in interface org.springframework.aop.TargetSource

isStatic

public boolean isStatic()

Specified by:

isStatic in interface org.springframework.aop.TargetSource

getTarget

@Nullable
public Object getTarget()

Specified by:

getTarget in interface org.springframework.aop.TargetSource

releaseTarget

public void releaseTarget(Object target)

Specified by:

releaseTarget in interface org.springframework.aop.TargetSource