Fred Dushin wrote:
I understand that CXF provides APIs for installed interceptors
through the InterceptorProvider interface, which the Bus, Endpoint,
and Service types all extend (among other types).
Suppose I want to create, via configuration, some sort of CXF plugin
(I hesitate to call this an interceptor, for reasons which should
become obvious). The purpose of this plugin is to install
interceptors programatically into the call chain.
I can see how to do this using a reference to a Bus -- e.g., I can
spring-load the plugin I want to install, and wire it up to the Bus
-- common pattern. And from there, I can get access to the Bus-level
InterceptorProvider, since the Bus extends that type.
That would work in the case where I want my plugin to install these
interceptors globally, i.e, for all services and endpoints in a Bus;
however, suppose I want to install my interceptors at a finer level
of granularity, e.g., per endpoint. Is there a way for my plugin,
which seems to be loaded at Bus initialization time, to get a handle
on the Service or Endpoint (which also implement InterceptorProvider)
for which it is (or counterfactually would be) configured? Is this
an envisioned pattern? Or is there some other sort of interceptor I
don't know of, e.g, which hooks into Service or Endpoint creation?
Thanks!
-Fred
Hi Fred,
On the client side you can manage interceptors at the client, endpoint,
service and bus level. If you have created your proxy using JAXWS APIs,
you need to first obtain a reference to the underlying CXF client object
as follows:
BasicGreeterService gs = new BasicGreeterService();
Greeter greeter = gs.getGreeterPort();
org.apache.cxf.endpoint.Client client =
org.apache.cxf.frontend.ClientProxy.getClient(greeter);
client.getOutInterceptors().add(...);
org.apache.cxf.endpoint.Endpoint endpoint = client.getEndpoint();
endpoint.getOutInterceptors().add(...);
org.apache.cxf.service.Service service = endpoint.getService();
service.getOutInterceptors().add(...);
On the server side, if you use the JAXWS API, cast the
javax.xml.ws.Endpoint object you obtained from publish to get access to
its underlying CXF endpoint. Note that Server - unlike Client - is not
an interceptor provider, which is a bit asymmetric.
javax.xml.ws.Endpoint jaxwsEndpoint =
javax.xml.ws.Endpoint.publish("http://localhost:9020/SoapContext/GreeterPort";,
new GreeterImpl(););
LoggingOutInterceptor out = new LoggingOutInterceptor();
org.apache.cxf.jaxws.EndpointImpl jaxwsEndpointImpl =
(org.apache.cxf.jaxws.EndpointImpl)endpoint;
org.apache.cxf.endpoint.Server server = jaxwsEndpointImpl.getServer();
org.apache.cxf.endpoint.Endpoint endpoint = server.getEndpoint();
endpoint.getOutInterceptors().add(...);
org.apache.cxf.service.Service service = endpoint.getService();
service.getOutInterceptors().add(...);
You can also have an interceptor installed at bus level which, when
executing, adds further interceptors to the chain, possibly on a per
message basis. This is done for example in
org.apache.cxf.ws.policy.ClientPolicyOutInterceptor.
Cheers,
Andrea.
