By John Mueller
Aimed squarely on the skilled developer who has labored with COM and is past the fundamentals of COM+. exhibits how COM+ can be utilized in either the overall and firm programming environments. offers 5 serious and completely practical programming examples that display a wide selection of strength COM+ makes use of. Covers the 2 new gains of the COM+ atmosphere -MSMQ(Microsoft administration Queue) and MTS (Microsoft Transaction Server).
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Additional resources for COM+ Developer's Guide
DCOM connection overview block diagram DCOM Network Protocol (DCE RPC Network Protocol) Defines a protocol for creating a connection with a remote server for the purpose of using objects. In addition to implementing a component protocol, this block contains all of the elements to implement the object remote procedure call (ORPC) specification at an application level. This particular component is known by several different names in the Microsoft documentation, the most popular of which is DCOM wire protocol.
All access is through the API using the Queue Manager. There’s a fourth MSMQ component that you also need to be aware of that has little to do with the actual handling of the messages. It’s the MSMQ Information Service (MQIS). This database holds the definitions for MSMQ sites, machines, queues, and users. The actual database is implemented using SQL Server, which is why Windows 2000 provides a “limited” version of SQL Server as part of the package. You won’t find MQIS on every machine, and definitely not on any client.
True dynamic load balancing needs to incorporate some type of reconnect strategy. As the load from a user on one machine increases and the load from a user on another machine decreases, it might be necessary to reconnect them to different servers to keep the load on both servers balanced. Unfortunately, DCOM doesn’t provide any built-in functionality to implement a reconnection strategy, which means the developer will need to create yet another component that monitors the current situation and makes reconnection recommendations as necessary.
COM+ Developer's Guide by John Mueller