Component Tech Intro 2

Intro to component tech 2

IDL

interface definition language

language independent IDL tradeoff 1

more flexibility as components can be written in whatever language

language independent IDL tradeoff 2

more complex for the programmer who needs to know a language and the IDL

language independent IDL tradeoff 3

slightly more complex for the compiler/ framework

component population

provide all the functions we need and the interfaces needed by other components

component framework

a “harness” within which to deploy the components that provides global services and ensures dependencies are satisfied

framework service 1

locate the components it needs

framework service 2

access functions offered by other components’ interfaces

framework service 3

load components into roles

difference between object-oriented 1

OO is a single code base with no pre-defined structure for applications. component tech has multiple sources structured within a framework

difference between object-oriented 2

OO dependencies are sometimes hard to find. component tech has explicit interfaces and binding.

difference between object-oriented 3

OO once compiled, code doesn’t change. in component tech, component instances dynamically change.

extensibility

we want to add/ change components across the system’s lifetime