From b2d80610db6beda38573890ed169815e495bc663 Mon Sep 17 00:00:00 2001
From: Nguyễn Gia Phong <mcsinyx@disroot.org>
Date: Sun, 24 May 2020 16:34:31 +0700
Subject: [usth/ICT2.7] Engineer software

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+1
+00:00:00,210 --> 00:00:01,569
+The last topic I want to cover in
+
+2
+00:00:01,569 --> 00:00:04,939
+this lesson is architectural styles. So, let's see
+
+3
+00:00:04,939 --> 00:00:07,400
+what those architectural styles are. There are certain
+
+4
+00:00:07,400 --> 00:00:10,240
+design choices that when applied in a given context
+
+5
+00:00:10,240 --> 00:00:14,420
+regularly result in solutions with superior properties. What
+
+6
+00:00:14,420 --> 00:00:17,290
+this means is that, compared to other possible alternatives,
+
+7
+00:00:17,290 --> 00:00:20,952
+these solutions are more elegant, effective, efficient, dependable,
+
+8
+00:00:20,952 --> 00:00:25,560
+evolve-able, scale-able, and so on. Architectural styles capture exactly
+
+9
+00:00:25,560 --> 00:00:28,490
+these solutions. They capture idioms that we can
+
+10
+00:00:28,490 --> 00:00:30,870
+use when designing a system. For a more formal
+
+11
+00:00:30,870 --> 00:00:34,160
+definition, let's look how Mary Shaw and David Garlan
+
+12
+00:00:34,160 --> 00:00:37,480
+define a architectural style. They say that an architectural
+
+13
+00:00:37,480 --> 00:00:40,000
+style defines a family of systems in terms
+
+14
+00:00:40,000 --> 00:00:43,550
+of a pattern of structural organization; a vocabulary of
+
+15
+00:00:43,550 --> 00:00:47,880
+components and connectors and constraints on how these components
+
+16
+00:00:47,880 --> 00:00:50,620
+and connectors can be combined. So in summary we
+
+17
+00:00:50,620 --> 00:00:53,650
+can say that an architectural style is a named collection
+
+18
+00:00:53,650 --> 00:00:57,680
+of architectural design decisions applicable in a given context. And I
+
+19
+00:00:57,680 --> 00:01:00,100
+want to stress that it is important to study and
+
+20
+00:01:00,100 --> 00:01:04,670
+know these architectural styles for several reasons. Because knowing them allows
+
+21
+00:01:04,670 --> 00:01:07,660
+us to avoid reinventing the wheel. It also allows us
+
+22
+00:01:07,660 --> 00:01:10,330
+to choose the right solution to a known problem and in
+
+23
+00:01:10,330 --> 00:01:12,910
+some cases it even allows us to move on and
+
+24
+00:01:12,910 --> 00:01:16,400
+discover even more advanced styles if we know the basic ones.
+
+25
+00:01:16,400 --> 00:01:19,340
+So we should be familiar with architectural styles, what
+
+26
+00:01:19,340 --> 00:01:22,000
+they are, and in which context they work, and
+
+27
+00:01:22,000 --> 00:01:23,800
+in which context they do not work. So as
+
+28
+00:01:23,800 --> 00:01:26,090
+to be able to apply them in the right situations.
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