Billing Care is an application deployed to an Oracle WebLogic Server domain. Customizations are deployed to the same domain as a customizations shared library. A Billing Care deployment plan, referencing the customizations shared library, implements your customizations.

Users connect to Billing Care with a web browser where modules are presented for performing billing and customer care operations. See "About Billing Care Modules" for more information about modules.

Billing Care's REST framework communicates with web browsers and Oracle Communications Billing and Revenue Management (BRM) using a connection pool to the Connection Manager.

Figure 2-1 shows the described architecture in a topological view.

The REST framework includes several modules to perform billing and customer care transactions with BRM. Each module consists of four tiers, each with its own set of responsibilities:

• The Resource tier manages RESTful client requests and responses.

• The Module tier coordinates transformation of RESTful operations and payload into BRM native formats.

• The Worker tier contains methods for converting data between Billing Care and BRM formats.

• The PCM tier manages the connections between Billing Care and the BRM Connection Manager.

Figure 2-2 shows the Billing Care REST framework tiers and a sample account module. The column on the left describes the tiers in general. The column on the right provides a specific example of the tiers for the Account REST module where:

• The Account Resource is the Resource tier.

• The PCMAccountModule is the Module tier.

• The AccountWorker is the Worker tier.

• The PCM tier is represented in the same way in both columns, as connections to BRM are shared by all resources.

Billing Care is a web-based application built using the open-source libraries listed in Table 2-1. The table describes how each library is used. For more information on each library, see the library-specific documentation at the provided links.