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Overview of the CORBA Name Service

Overview of the CORBA Name Service
This topic includes the following sections:
Note:
Technical support for third party CORBA Java ORBs should be provided by their respective vendors. Oracle Tuxedo does not provide any technical support or documentation for third party CORBA Java ORBs.
The CORBA Name Service
The Oracle Tuxedo Name Service (referred to throughout this document as the CORBA Name Service) allows Oracle Tuxedo CORBA server applications to advertise object references using logical names. Oracle Tuxedo CORBA client applications can then locate an object by asking the CORBA Name Service to look up the name.
The CORBA Name Service provides:
The CORBA Name Service is a layered product. The CORBA Name Service is installed as part of the Oracle Tuxedo product. For a complete description of the supported platforms and the installation procedure, see Installing the Oracle Tuxedo System.
When using the CORBA Name Service:
1.
2.
Figure 1‑1 presents an overview of the CORBA Name Service.
Figure 1‑1 CORBA Name Service
 
Understanding the CORBA Name Service
Figure 1‑2 shows how a namespace might be used to store objects that make up an order entry application.
Figure 1‑2 An Oracle Tuxedo Namespace
 
The illustrated application organizes its namespace by geographic region, then by department. To implement the namespace using the objects in the CORBA Name Service, each shadowed box would be implemented by a NamingContext object. A NamingContext object contains a list of CosNaming::Name data structures that have been bound to application objects or to other NamingContext objects. NamingContext objects are traversed to locate a particular name. For example, the logical name California.Manufacturing.Order can be used to locate the Order object.
A CosNaming::Name data structure is not simply a string of alphanumeric characters; it is a sequence of one or more CosNaming::NameComponent data structures. Each CosNaming::NameComponent data structure contains two strings, id and kind. The CORBA Name Service does not interpret or manage these strings, except to ensure that each ID is unique within a given NamingContext object.
Oracle Tuxedo CORBA server applications use the bind() method of the NamingContext object to bind a name to an application object contained in the server application. Oracle Tuxedo CORBA client applications use the resolve method of a NamingContext object to locate an object using a binding.
The CORBA Name Service also provides a BindingIterator object and a NamingContextExt object. The BindingIterator object allows a client application to obtain a specified number of bindings in each call. The NamingContextExt object provides methods to use Uniform Resource Locators (URL) and stringified names.
For a complete description of the objects in the CORBA Name Service and their interfaces, see Chapter 2, “CORBA Name Service Reference.”
 

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