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+Now that we have discussed a few foundational aspects

+

+2

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+of software architectures, and we have looked at some real

+

+3

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+world examples that help us to illustrate some of these

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+4

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+points, to discuss some of these aspects. I want to

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+5

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+introduce and define the different elements that compose a software

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+6

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+architecture and also talk about architectural styles. So let's start

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+by discussing a software architecture's

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+8

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+elements. A software system's architecture

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+9

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+typically is not, and should not be, a uniform monolith.

+

+10

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+On the contrary, an architecture should be a

+

+11

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+composition and interplay of different elements. In particular,

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+12

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+as we quickly mentioned at the beginning of

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+13

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+the lesson, there are three main types of elements

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+14

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+in an architecture. Processing elements, data elements, and

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+interaction elements. Processing elements are those elements that implement

+

+16

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+the business logic and perform transformations on data.

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+17

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+Data elements, also called information or state, are those

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+18

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+elements that contain the information that is used

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+19

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+and transformed by the processing elements. And finally,

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+20

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+the interaction elements are the glue that holds

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+the different pieces of the architecture together. Now,

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+22

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+the processing elements and the data are contained

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+23

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+into the system components, whereas the interaction elements

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+24

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+are maintained and controlled by the system connectors.

+

+25

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+And components and connectors get all cooked together

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+26

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+into a systems configuration, which models

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+27

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+components, connectors and their relationships. So

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+28

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+now, let's look at components, connectors

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+29

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+and configurations in a little more detail.