Chapter 40. COM Enterprise Services

Chapter 40. COM+ Enterprise Services

IN BRIEF

COM+ is a set of services that are provided to applications to facilitate enterprise-scale development. This chapter will provide you with an overview of how COM+ works and how it evolved. After a brief overview of COM+, you will spend the rest of the chapter developing serviced components. Serviced components are classes that are managed by COM+ services.

COM+ provides application developers with the ability to quickly and easily share property data and perform things such as two-phase commit transactions, just-in-time activation, object pooling, automatic object construction, and much more. After reading this chapter, you should have a good idea of what COM+ is, how it works, and how to write C# code that takes advantage of COM+.

WHAT YOU NEED

REQUIRED SOFTWARE	.NET Framework SDK v1.1 Visual Studio .NET 2003 with C# installed
RECOMMENDED HARDWARE	PC that meets .NET SDK minimum requirements
SKILLS REQUIRED	C# and .NET familiarity Familiarity with COM+

COM+ Enterprise Services at a Glance

Overview of COM+		809
	Transactions	809	Role-Based Security	811
	JIT Activation in COM+	810	Queued Components	812
	Object Pooling	810	Events	812
	Construction Strings	811
Building COM+ Components		813
	Transactions	813	Object Pooling	817
	Construction Strings	815	Shared Properties	818
	JIT Activation Sample	817
Security in COM+		820
	Object and Security Contexts	820	Role-Based Security	821
Advanced COM+		823
	Events	823	Queued Components	826
Summary		827
Further Reading		827