COM & .NET Component Services

Catalog Structure

This section discusses the Catalog structure and the names of the items in it, not the semantics of these items. Some of these items have already been covered in the previous chapters, and some are covered in subsequent chapters. The COM+ Catalog’s actual structure, from the root down to the component level, is mapped out in Figure 6-2. Each collection has a predefined identifying name, whereas catalog objects’ names are defined by the user. The root of the Catalog gives you access to top-level collections such as the Applications and TransientSubscription collections (see Chapter 9). You can also access less useful collections such as the communication protocols used by DCOM or all of the in-proc servers (COM objects in a DLL) installed on the machine. Another top-level collection shown in Figure 6-2 is the ComputerList collection—a list of all the computers that the Component Services Explorer is configured to manage.

Figure 6-2.  The COM+ Catalog structure, from the root down to the component level

The Applications collection, as the name implies, contains all the COM+ applications installed on the machine. A catalog object in the Applications collection allows you to set the properties of a particular COM+ application. It also gives you access to two other collections: the Roles and the Components collections. As mentioned previously, every folder in the Component ...