The main migration tasks for users moving from Impala 1.0 M6 from earlier versions is to replace ContributionProxyFactoryBean and ModuleContributionPostProcessor with their 1.0M6 replacements. While these classes will still work as before in 1.0 M6, they are now deprecated and slated for removal in future releases.

For more details on importing from and exporting to the service registry, see ImportingAndExportingServices.

ContributionProxyFactoryBean

This factory bean was formerly used to import beans from the Impala service registry and to create the proxy to them which can be used by other client beans.

Here's an example:

<bean id="namedMessageService"
class="org.impalaframework.spring.service.proxy.ContributionProxyFactoryBean">
	<property name = "proxyTypes" value = "interfaces.MessageService"/>
	<property name = "exportName" value = "myNamedMessageService"/>
</bean>

ContributionProxyFactoryBean itself has been replaced by NamedServiceProxyFactoryBean:

<bean id="namedMessageService" class="org.impalaframework.spring.service.proxy.NamedServiceProxyFactoryBean">
     <property name="proxyTypes" value="interfaces.MessageService"/>
     <property name="exportName" value="myNamedMessageService"/>
</bean>

However, with the availability of the new service namespace, you can now set this up as follows:

<service:import id="namedMessageService" 
	proxyTypes="interfaces.MessageService"
	exportName="myNamedMessageService"/>

ModuleContributionPostProcessor

Prior to 1.0 M6, ModuleContributionPostProcessor was used to automatically export beans which from the current module which have parent modules which expose named service endpoints with the same name as the current module's bean name.

For example, if you had the above ContributionProxyFactoryBean declaration in the parent module for the bean named namedMessageService, and the child module contained the bean

<bean class = "org.impalaframework.spring.service.exporter.ModuleContributionPostProcessor"/>

then a bean in the child module named namedMessageService would automatically be exported.

Again, this behaviour still applies in 1.0 M6. However, ModuleContributionPostProcessor has been replaced by NamedServiceAutoExportPostProcessor.

<bean class = "org.impalaframework.spring.service.exporter.NamedServiceAutoExportPostProcessor"/>

However, with the new service namespace, this can simply be replaced using:

<service:auto-export/>