This topic includes the following sections:
Note: | The BEA Tuxedo CORBA Java client and BEA Tuxedo CORBA Java client ORB were deprecated in Tuxedo 8.1 and are no longer supported. All BEA Tuxedo CORBA Java client and BEA Tuxedo CORBA Java client ORB text references, associated code samples, should only be used to help implement/run third party Java ORB libraries, and for programmer reference only. |
Note: | Technical support for third party CORBA Java ORBs should be provided by their respective vendors. BEA Tuxedo does not provide any technical support or documentation for third party CORBA Java ORBs. |
The BEA Tuxedo Name Service (referred to throughout this document as the CORBA Name Service) allows BEA Tuxedo CORBA server applications to advertise object references using logical names. BEA 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 BEA Tuxedo product. For a complete description of the supported platforms and the installation procedure, see Installing the BEA Tuxedo System.
When using the CORBA Name Service:
Figure 1-1 presents an overview of the CORBA Name Service.
Figure 1-2 shows how a namespace might be used to store objects that make up an order entry application.
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.
BEA 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. BEA 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 CORBA Name Service Reference.