JndiDestinationResolver (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.jms.support.destination
Class JndiDestinationResolver

java.lang.Object
  org.springframework.jndi.JndiAccessor
      org.springframework.jndi.JndiLocatorSupport
          org.springframework.jms.support.destination.JndiDestinationResolver

All Implemented Interfaces:: CachingDestinationResolver, DestinationResolver

public class JndiDestinationResolver
extends JndiLocatorSupport
implements CachingDestinationResolver
extends JndiLocatorSupport
implements CachingDestinationResolver

DestinationResolver implementation which interprets destination names as JNDI locations (with a configurable fallback strategy).

Allows for customizing the JNDI environment if necessary, for example specifying appropriate JNDI environment properties.

Dynamic queues and topics get cached by destination name. As a consequence, you need to use unique destination names across both queues and topics. Caching can be turned off through the "cache" flag.

Note that the fallback to resolution of dynamic destinations is turned off by default. Switch the "fallbackToDynamicDestination" flag on to enable this functionality.

Since:: 1.1
Author:: Mark Pollack, Juergen Hoeller
See Also:: JndiAccessor.setJndiTemplate(org.springframework.jndi.JndiTemplate), JndiAccessor.setJndiEnvironment(java.util.Properties), setCache(boolean), setFallbackToDynamicDestination(boolean)

Field Summary

Fields inherited from class org.springframework.jndi.JndiLocatorSupport

CONTAINER_PREFIX

Fields inherited from class org.springframework.jndi.JndiAccessor

logger

Constructor Summary

JndiDestinationResolver()


Method Summary

void clearCache()
          Clear the entire destination cache.

void removeFromCache(String destinationName)
          Remove the destination with the given name from the cache (if cached by this resolver in the first place).

Destination resolveDestinationName(Session session, String destinationName, boolean pubSubDomain)
          Resolve the given destination name, either as located resource or as dynamic destination.

void setCache(boolean cache)
          Set whether to cache resolved destinations.

void setDynamicDestinationResolver(DestinationResolver dynamicDestinationResolver)
          Set the DestinationResolver to use when falling back to dynamic destinations.

void setFallbackToDynamicDestination(boolean fallbackToDynamicDestination)
          Set whether this resolver is supposed to create dynamic destinations if the destination name is not found in JNDI.

protected void validateDestination(Destination destination, String destinationName, boolean pubSubDomain)
          Validate the given Destination object, checking whether it matches the expected type.

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

Fields inherited from class org.springframework.jndi.JndiLocatorSupport
`CONTAINER_PREFIX`

Fields inherited from class org.springframework.jndi.JndiAccessor
`logger`

Constructor Summary
`JndiDestinationResolver()`

Method Summary
`void`	`clearCache()` Clear the entire destination cache.
`void`	`removeFromCache(String destinationName)` Remove the destination with the given name from the cache (if cached by this resolver in the first place).
`Destination`	`resolveDestinationName(Session session, String destinationName, boolean pubSubDomain)` Resolve the given destination name, either as located resource or as dynamic destination.
`void`	`setCache(boolean cache)` Set whether to cache resolved destinations.
`void`	`setDynamicDestinationResolver(DestinationResolver dynamicDestinationResolver)` Set the `DestinationResolver` to use when falling back to dynamic destinations.
`void`	`setFallbackToDynamicDestination(boolean fallbackToDynamicDestination)` Set whether this resolver is supposed to create dynamic destinations if the destination name is not found in JNDI.
`protected void`	`validateDestination(Destination destination, String destinationName, boolean pubSubDomain)` Validate the given Destination object, checking whether it matches the expected type.

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

JndiDestinationResolver

public JndiDestinationResolver()

Method Detail

setCache

public void setCache(boolean cache)

Set whether to cache resolved destinations. Default is "true".

This flag can be turned off to re-lookup a destination for each operation, which allows for hot restarting of destinations. This is mainly useful during development.

Note that dynamic queues and topics get cached by destination name. As a consequence, you need to use unique destination names across both queues and topics.

setFallbackToDynamicDestination

public void setFallbackToDynamicDestination(boolean fallbackToDynamicDestination)

Set whether this resolver is supposed to create dynamic destinations if the destination name is not found in JNDI. Default is "false".

Turn this flag on to enable transparent fallback to dynamic destinations.

See Also:: setDynamicDestinationResolver(org.springframework.jms.support.destination.DestinationResolver)

setDynamicDestinationResolver

public void setDynamicDestinationResolver(DestinationResolver dynamicDestinationResolver)

Set the DestinationResolver to use when falling back to dynamic destinations.

The default is Spring's standard DynamicDestinationResolver.

See Also:: setFallbackToDynamicDestination(boolean), DynamicDestinationResolver

resolveDestinationName

public Destination resolveDestinationName(Session session,
                                          String destinationName,
                                          boolean pubSubDomain)
                                   throws JMSException

Description copied from interface: DestinationResolver

Resolve the given destination name, either as located resource or as dynamic destination.

Specified by:: resolveDestinationName in interface DestinationResolver

Parameters:: session - the current JMS Session; destinationName - the name of the destination; pubSubDomain - true if the domain is pub-sub, false if P2P
Returns:: the JMS destination (either a topic or a queue)
Throws:: JMSException - if resolution failed

validateDestination

protected void validateDestination(Destination destination,
                                   String destinationName,
                                   boolean pubSubDomain)

Validate the given Destination object, checking whether it matches the expected type.

Parameters:: destination - the Destination object to validate; destinationName - the name of the destination; pubSubDomain - true if a Topic is expected, false in case of a Queue

removeFromCache

public void removeFromCache(String destinationName)

Description copied from interface: CachingDestinationResolver

Remove the destination with the given name from the cache (if cached by this resolver in the first place).

To be called if access to the specified destination failed, assuming that the JMS Destination object might have become invalid.

Specified by:: removeFromCache in interface CachingDestinationResolver

Parameters:: destinationName - the name of the destination

clearCache

public void clearCache()