COM & .NET Component Services

Improved Queuing Support

As explained in Chapter 8, queued components under COM+ 1.0 require the presence of a domain controller to provide authentication for the queued call. If you do not have a domain controller, you must turn off COM+ 1.0 application authentication (set it to None). COM+ 1.5 provides better configurable support for queued calls by separating them from normal synchronous calls. The application Queuing tab now lets you configure authentication for queued calls explicitly (see Figure B-8). Your available options are to:

• Use MSMQ domain controller authentication when the application is configured to use authentication for synchronous calls (when the application authentication is set to any value except None).

• Never authenticate queued calls into this application. Choosing this option allows you to use queued components freely without a domain controller.

• Always authenticate incoming queued calls, regardless of the application authentication setting.

Figure B-8. COM+ 1.5 server application Queuing tab

The Queuing tab also allows you to control the maximum number of concurrent players the application can contain. Because every player is created on a separate thread, some overhead is associated with creating and maintaining a player. In extreme situations, your application may grind to a halt if the number of concurrent players is too large (a few hundred). When you ...