1
00:00:00,250 --> 00:00:02,350
And let's start with software components. A

2
00:00:02,350 --> 00:00:06,700
software component is an architectural entity that encapsulates

3
00:00:06,700 --> 00:00:09,940
a subset of the system's functionality and or

4
00:00:09,940 --> 00:00:13,180
the system's data. So basically components typically provide

5
00:00:13,180 --> 00:00:16,100
application specific services. In addition to that, a

6
00:00:16,100 --> 00:00:19,650
software component also restricts access to that subset

7
00:00:19,650 --> 00:00:23,570
via an explicitly defined interface. And, in addition,

8
00:00:23,570 --> 00:00:25,610
which I'm not showing here, a component

9
00:00:25,610 --> 00:00:28,010
can also have explicitly defined dependencies

10
00:00:28,010 --> 00:00:30,990
on its required execution environment. In complex

11
00:00:30,990 --> 00:00:33,680
systems, interactions might become more important and

12
00:00:33,680 --> 00:00:36,220
challenging than functionality. And this is why

13
00:00:36,220 --> 00:00:40,000
connectors are very important architectural elements. A

14
00:00:40,000 --> 00:00:42,935
software connector is an architectural building block

15
00:00:42,935 --> 00:00:46,990
tasked with effecting and regulating interactions among

16
00:00:46,990 --> 00:00:50,980
components. So basically, connectors typically provide application

17
00:00:50,980 --> 00:00:54,610
independent interaction facilities. And it's worth noting here

18
00:00:54,610 --> 00:00:57,530
that in many software systems, connectors might simply be

19
00:00:57,530 --> 00:01:01,140
procedure calls or shared data accesses. So all constants

20
00:01:01,140 --> 00:01:03,589
that we're familiar with. But consider that much more

21
00:01:03,589 --> 00:01:06,690
sophisticated and complex connectors are also possible. And

22
00:01:06,690 --> 00:01:10,310
components and connectors are composed in a specific way

23
00:01:10,310 --> 00:01:13,510
in a given system architecture to accomplish that system's

24
00:01:13,510 --> 00:01:17,400
objective And this is expressed through an architectural configuration.

25
00:01:17,400 --> 00:01:21,070
More precisely, an architectural configuration, or topology, is a

26
00:01:21,070 --> 00:01:25,630
set of specific associations between the components and connectors

27
00:01:25,630 --> 00:01:28,380
of a software system's architecture. So now, let's look

28
00:01:28,380 --> 00:01:30,880
at an example that brings all of this together.