Handling multiple Rest web services using Spring and Castor - web-services

Question

Would anyone be able to advise me on the best way of handling access to multiple Rest web services using Springs RestTemplate?
I know that the RestTemplate object has a message converter reference (MarshallingHttpMessageConverter) which in turn has a reference to an unmarshaller. In my case I am using the Spring Frameworks CastorMarshaller object with associated mapping file.
Normally I could have just added all my mappings to one Castor mapping file. However in my case all the web services are of this format (block below) with the < rows ... /> holding different entities depending on the service called.
<data>
<output>
<dataset>
<row id="" .... />
<row id="" .... />
<row id="" .... />
<row id="" .... />
<row id="" .... />
</dataset>
</output>
<nextUpdate><nextUpdate/>
</data>
The CastorMarshaller is injected into the MessageConverter which itself is injected into the RestTemplate in the application context configuration file.
<bean id="restTemplate" class="org.springframework.web.client.RestTemplate">
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.xml.MarshallingHttpMessageConverter">
<property name="marshaller" ref="castorMarshaller"/>
<property name="unmarshaller" ref="castorMarshaller"/>
<property name="supportedMediaTypes">
<list>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="application"/>
<constructor-arg index="1" value="xml"/>
</bean>
<bean class="org.springframework.http.MediaType">
<constructor-arg index="0" value="text"/>
<constructor-arg index="1" value="xml"/>
</bean>
</list>
</property>
</bean>
</list>
</property>
</bean>
<bean id="castorMarshaller" class="org.springframework.oxm.castor.CastorMarshaller">
<property name="mappingLocation" value="classpath:oxm-mapping-worldweather.xml"/>
</bean>
Possible options that I have been thinking about:
1 Create multiple RestTemplates for each Rest service.
2 Create multiple MessageConverters for the different services and change the message converters on the template when accessing a different service.
3 Create multiple CasterMarshaller objects for the different services and update the message converter with the new unmarshaller
What is the best way to approach handling multiple services like this with the same root and sub elements?
Thanks in advance
Sman UK

Answer 1

If specifying multiple mapping files is the issue then below is the solution.
Use mappingLocations property instead of mappingLocation as given below,
<bean id="castorMarshaller" class="org.springframework.oxm.castor.CastorMarshaller">
<property name="mappingLocations">
<list>
<value>classpath:oxm-mapping-worldweather.xml</value>
<value>classpath:sample-mapping.xml</value>
</list>
</property>
</bean>