Skip to Main Content
COM & .NET Component Services
book

COM & .NET Component Services

by Juval Lowy
September 2001
Intermediate to advanced content levelIntermediate to advanced
384 pages
11h 59m
English
O'Reilly Media, Inc.
Content preview from COM & .NET Component Services

COM+ Transactions Architecture

COM+ is an advanced TPM that provides your components with easy-to-use administrative configuration for your transactional needs. COM+ encapsulates the underlying transaction monitoring and coordination required to manage a transaction. The COM+ transactions architecture defines a few basic concepts you need to understand to take advantage of COM+ transactions support: resource managers, the transaction root, the two-phase commit protocol, and the Distributed Transaction Coordinator (DTC).

Resource Managers

A resource (such as a database management system) that can participate in a COM+ transaction is called a resource manager. A resource manager knows how to conduct itself properly in the scope of a COM+ transaction—it records the changes done by your application’s objects and will only commit the changes when told to do so. A resource manager knows how to discard the changes and revert to its previous state if it is told to roll back. A resource manager can auto-enlist in a transaction—the resource manager can detect it is being accessed by a transaction and enlist itself in it. Every COM+ transaction has a unique transaction ID (a GUID), created by COM+ at the beginning of the transaction. The resource manager keeps track of the transaction ID and will not enlist twice. Auto-enlisting means that your components are not required to explicitly enlist the resources needed for a transaction; therefore, they do not have to deal with the problem of ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Windows Server® 2008 Security Resource Kit

Windows Server® 2008 Security Resource Kit

Jesper M. Johansson

Publisher Resources

ISBN: 0596001037Supplemental ContentCatalog PageErrata