Product: OpenFusion JacORB
Version: 2.1 and above
Description:
What is the difference between the Naming Service and the Trading Service?
Solution:
The Naming and Trading Services are very similar in the services that these provide. These two services are the preferred ways to locate objects and bootstrap a distributed application. These two services differ in the offered levels of service.
Naming Service
- Objects ('services') are registered by name only
- Clients look up by specifying the service name. Note as the namespace is hierarchical, the full name and path must be specified. e.g. /PrismTech/Products/Trader
- A reference to one matching service is returned (if one is found)
- The matching must be exact
Trading Service
- Services are registered by service type and property values
- Clients look up by specifying the service type and the desired property values, for example "Find me a company that has revenue > $500M and EPS <$0.20
- A list of references to all matching services is returned
- Matching is configurable, i.e. it can be an exact match (all property constraints must be satisfied) or a partial match (some properties can be specified as preferences rather than constraints)
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