Using Federated Queries: Example

For an example of the use of a federated query, see JAXRQueryFederation.java in the directory install/registry-samples/query-federation/src. This example performs two queries, a declarative query and a stored query, on every federation it finds (the database provided with the Registry contains only one). Because the federation stored in the Registry database does not have a well-known identifier value, the example uses findObjects to locate the federation.

The declarative query is the query that is performed in Using Declarative Queries: Example. The stored query is the FindAllMyObjects query.

Because the federation in the Registry database has no members, this example cannot perform the queries.

To Run the JAXRQueryFederationExample

1. Go to the directory install/registry-samples/query-federation.

2. Type the following command:

   Ant-base/ant run

   The output of the run target looks something like this:

   run: [java] Query URL is http://localhost:6480/soar/registry/soap [java] Created connection to registry [java] Got registry service and query manager [java] Federation name: freebXMLRegistryFederation [java] Federation description: freebXML Registry Federation [java] Federation key id: urn:uuid:cb5039c1-85b2-4512-839a-893cb882c981 [java] Federation has no members [java] Cannot perform query