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declarative services applied in SOAP

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Hi All ,
This is in ref to the serviceEndpoint design chapter 3.
Designing Web Services with the J2EE 1.4 Platform - Early Access
Quote " Before the port passes the request to the endpoint it ensures that the J2EE container applies its declarative services to the SOAP request"
What are the declarative services referred here .Can any one elucidate on them.
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I believe it is talking about the deployment descriptor.
When you develop the web service using JAX-RPC service endpoint or EJB service endpoint, you may define some constraints or mapping etc in the deployment descriptor(like web.xml in Web container, or ejb-jar.xml in EJB container). For example, You can declaratively define security constraints, roles, etc.
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You can define Message handlers also and they should be applied before the request goes to the service endpoint.
Message headers add/remove/process SOAP message headers.
No prison can hold Chairface Chippendale. And on a totally different topic ... my stuff:
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