WEBVTT 1 00:00:00.080 --> 00:00:03.799 Okay, so you're really diving deep into C plus plus 2 00:00:03.799 --> 00:00:07.360 software architecture. Huh, looks like we've got a ton of 3 00:00:07.360 --> 00:00:10.039 material to get through. Excerpts from a C plus plus 4 00:00:10.119 --> 00:00:14.359 architecture book, the preface, even some code snippets. 5 00:00:14.599 --> 00:00:15.679 Yeah, there's a lot here. 6 00:00:15.839 --> 00:00:18.600 Sounds like someone's ready for a serious knowledge upgrade. 7 00:00:18.640 --> 00:00:21.320 Absolutely tons of great info to unpack. 8 00:00:21.480 --> 00:00:24.359 Well, we're here to help you extract the gold, right, Yeah, 9 00:00:24.399 --> 00:00:26.480 I'm already kind of fascinated by some of this stuff, 10 00:00:26.519 --> 00:00:30.399 like this winking out memory technique. It's like straight out 11 00:00:30.440 --> 00:00:33.479 of a sci fi novel or something. Right, But before 12 00:00:33.479 --> 00:00:35.280 we get lost in the weeds, maybe we should take 13 00:00:35.280 --> 00:00:38.759 a step back, like why is software architecture so important 14 00:00:38.759 --> 00:00:40.920 in the first place, especially when we're talking about something 15 00:00:40.960 --> 00:00:42.880 as powerful as C plus plus bouth. 16 00:00:43.039 --> 00:00:45.679 Well, that's a great question, and you know, the book 17 00:00:45.759 --> 00:00:48.960 really emphasizes that even with a language like C plus 18 00:00:49.039 --> 00:00:54.000 plus O, good architecture is still like the foundation for success. 19 00:00:54.119 --> 00:00:54.399 Yeah. 20 00:00:54.479 --> 00:00:57.280 They talk about this concept of software decay, you know, 21 00:00:57.280 --> 00:00:59.600 where systems just naturally tend to get harder and harder 22 00:00:59.640 --> 00:01:04.159 to maintain over time, and without a clear architectural vision, 23 00:01:04.599 --> 00:01:07.799 you risk ending up with what they call an accidental architecture, 24 00:01:08.079 --> 00:01:10.560 which is basically just a big mess that doesn't really 25 00:01:10.680 --> 00:01:11.799 meet the user's needs. 26 00:01:11.879 --> 00:01:14.959 Oh yeah, it's like building a house without blueprints exactly. 27 00:01:15.359 --> 00:01:17.640 You know, it might stand for a while, but try 28 00:01:17.719 --> 00:01:20.719 making any changes or additions later on and things can 29 00:01:20.760 --> 00:01:21.760 get really dicey. 30 00:01:22.000 --> 00:01:22.200 Right. 31 00:01:22.400 --> 00:01:27.040 Yeah, So choosing an architecture consciously it's like creating those blueprints, right. 32 00:01:27.640 --> 00:01:33.719 It makes your software adaptable and maintainable, so it can 33 00:01:33.840 --> 00:01:35.400 evolve gracefully over time. 34 00:01:35.719 --> 00:01:36.200 I like that. 35 00:01:36.400 --> 00:01:40.159 Now they do mention different scopes of architecture, like enterprise solutions, 36 00:01:40.239 --> 00:01:43.159 software and infrastructure, but it looks like your focus here 37 00:01:43.200 --> 00:01:44.799 is mainly on software architecture. 38 00:01:45.319 --> 00:01:47.879 Yeah, for this deep dive at least, I'm mostly interested 39 00:01:48.000 --> 00:01:52.120 in how the code itself is structured within a specific project. Okay, 40 00:01:52.439 --> 00:01:55.120 And speaking of structure, the book brings up this idea 41 00:01:55.239 --> 00:01:59.920 of architecturally significant requirements or asrs, and these are like 42 00:02:00.200 --> 00:02:03.640 the make or break factors that really influence the design choices. 43 00:02:03.920 --> 00:02:06.120 But figuring these out is key because they might not 44 00:02:06.239 --> 00:02:10.439 always be super obvious, like they give examples of needing 45 00:02:10.479 --> 00:02:14.800 to integrate with a specific external system, or maybe there 46 00:02:14.879 --> 00:02:18.080 are really strict performance targets that you have to meet, 47 00:02:18.800 --> 00:02:23.039 or even specific technologies that a client requires you to use. 48 00:02:23.159 --> 00:02:27.400 Absolutely, Like they had this great example about an app 49 00:02:27.439 --> 00:02:31.719 being developed for the Dominican Fair in quotesk oh yeah, Yeah. 50 00:02:31.800 --> 00:02:35.680 The functional requirements were pretty straightforward. List the merchants events, 51 00:02:36.120 --> 00:02:40.840 search functionality, user registration, payment processing. Okay, standard stuff, but 52 00:02:40.879 --> 00:02:43.599 there was this hidden requirement they had to integrate with 53 00:02:43.719 --> 00:02:48.919 an existing ticketing system. Ah, and that integration will it 54 00:02:48.919 --> 00:02:51.080 would have a huge impact on the architecture for sure. 55 00:02:51.159 --> 00:02:54.039 So thinking about those asrs upfront can save you a 56 00:02:54.080 --> 00:02:54.960 lot of pain later on. 57 00:02:55.319 --> 00:02:55.560 Right. 58 00:02:55.840 --> 00:02:58.319 Yeah. Another thing the book stresses is the importance of 59 00:02:59.080 --> 00:03:02.759 choosing between a state full or stateless approach when you're 60 00:03:03.080 --> 00:03:04.159 designing your software. 61 00:03:04.240 --> 00:03:05.919 Okay, so let's break that down a little bit. So 62 00:03:06.840 --> 00:03:11.560 stateful software like a web service that remembers user data. 63 00:03:11.680 --> 00:03:14.319 It seems efficient on the surface, but then you've got 64 00:03:14.360 --> 00:03:17.400 the whole challenge of synchronization, right right, If you have 65 00:03:17.719 --> 00:03:20.879 multiple requests trying to modify the state at the same time, 66 00:03:21.199 --> 00:03:24.840 you can run into all sorts of data races and inconsistencies. 67 00:03:24.840 --> 00:03:28.000 Absolutely, it gets messy. Yeah, And they contrast that with 68 00:03:29.120 --> 00:03:33.840 stateless services, where each request is self contained. They're much 69 00:03:33.879 --> 00:03:40.080 easier to scale and reason about because each request doesn't 70 00:03:40.120 --> 00:03:41.360 depend on what happened before. 71 00:03:41.599 --> 00:03:41.840 Yeah. 72 00:03:41.919 --> 00:03:44.400 Think of it like a conversation where each sentence makes 73 00:03:44.439 --> 00:03:46.400 sense on its own. Yeah, you know, you don't have 74 00:03:46.439 --> 00:03:47.879 to remember everything that was said. 75 00:03:47.719 --> 00:03:48.479 Before, gotcha. 76 00:03:48.719 --> 00:03:51.199 The book uses Twitter as an example. They show how 77 00:03:51.199 --> 00:03:56.000 they're stateless approach, RESTful APIs and all that really contributes 78 00:03:56.039 --> 00:03:58.879 to their ability to handle a massive volume of requests. 79 00:03:58.919 --> 00:04:01.560 That makes sense. So they're basically saying that stateless is 80 00:04:01.560 --> 00:04:02.120 the way to go. 81 00:04:02.319 --> 00:04:05.759 Well, they do acknowledge that sometimes there are practical reasons 82 00:04:05.840 --> 00:04:10.199 to deviate from the stateless ideal, like maybe you want 83 00:04:10.199 --> 00:04:13.520 to minimize data transfer or you need to squeeze out 84 00:04:13.520 --> 00:04:16.519 every bit of performance. It's all about finding the right 85 00:04:16.600 --> 00:04:18.759 balance for your specific needs. 86 00:04:19.040 --> 00:04:21.319 It sounds like a lot of software design comes down 87 00:04:21.360 --> 00:04:24.519 to finding that sweet spot between competing priorities. 88 00:04:24.720 --> 00:04:28.040 Yeah, definitely. And this leads us to the distinction between 89 00:04:29.319 --> 00:04:34.759 service oriented architectures SOA and micro services. Both of them 90 00:04:34.800 --> 00:04:39.120 involve breaking a system into smaller, more independent services, but 91 00:04:39.199 --> 00:04:40.319 there are key differences. 92 00:04:40.920 --> 00:04:43.399 So help me out here. What are the key differences 93 00:04:43.439 --> 00:04:45.720 between SOA and micro services? 94 00:04:45.920 --> 00:04:49.399 So soa is more of a broader concept. The services 95 00:04:49.439 --> 00:04:51.399 are self contained units, but they're bigger. 96 00:04:51.519 --> 00:04:51.800 Okay. 97 00:04:51.920 --> 00:04:55.839 They have well defined interfaces, and you can develop and 98 00:04:55.839 --> 00:04:58.879 deploy them independently, even using different technologies. 99 00:04:59.000 --> 00:05:02.079 I see example of two teams, one using C Shark, 100 00:05:02.160 --> 00:05:05.800 the other using C plus, building separate services that could 101 00:05:05.839 --> 00:05:06.759 still talk to each other. 102 00:05:06.879 --> 00:05:09.639 Yeah, exactly. It's like a universal translator for software. I 103 00:05:09.720 --> 00:05:13.199 like it now. Micro services take this modularity even further. 104 00:05:13.519 --> 00:05:16.759 Think smaller, even more focused services that can be deployed 105 00:05:16.759 --> 00:05:21.079 and scaled independently. Gotcha companies like Amazon, Netflix, and Facebook, 106 00:05:21.519 --> 00:05:25.480 they all use micro services to handle those massive scales 107 00:05:26.639 --> 00:05:29.240 and enable continuous delivery. 108 00:05:29.399 --> 00:05:31.639 It's like an army of ants, each one doing a 109 00:05:31.680 --> 00:05:34.560 small task, but together they accomplish something amazing. 110 00:05:34.879 --> 00:05:38.000 Exactly. But you know, micro services aren't a silver bullet. 111 00:05:38.600 --> 00:05:41.160 Managing a large number of them can get really complex. 112 00:05:41.399 --> 00:05:44.000 You need a strong DevOps culture and a high degree 113 00:05:44.000 --> 00:05:44.519 of automation. 114 00:05:44.639 --> 00:05:45.279 I can imagine. 115 00:05:45.279 --> 00:05:48.720 And this actually brings us to a fascinating point Conway's law. 116 00:05:48.959 --> 00:05:54.519 Conway's law it states that organizations which design systems are 117 00:05:54.560 --> 00:05:57.959 constrained to produce designs which are copies of the communication 118 00:05:58.079 --> 00:05:59.839 structures of these organizations. 119 00:06:00.160 --> 00:06:02.720 Wow. So basically, if your team isn't set up for 120 00:06:03.000 --> 00:06:07.079 good collaboration and clear communication, your architecture is going to suffer. 121 00:06:07.199 --> 00:06:10.160 Exactly. It's like that saying form follows function, but applied 122 00:06:10.199 --> 00:06:11.120 to software development. 123 00:06:11.199 --> 00:06:12.920 That's a really interesting way to look at it. 124 00:06:13.279 --> 00:06:16.759 Now, there's one more architectural pattern they talk about that's 125 00:06:16.800 --> 00:06:22.680 worth mentioning CQRS, which stands for command query responsibility segregation. 126 00:06:23.920 --> 00:06:26.959 It's a way of separating the responsibility of handling commands 127 00:06:27.319 --> 00:06:31.959 that change data from queries that retrieve data, and this 128 00:06:32.560 --> 00:06:37.560 can lead to better performance and scalability, especially in systems 129 00:06:37.600 --> 00:06:41.439 with really complex data models. They even suggest using different 130 00:06:41.480 --> 00:06:44.240 data stores for reads and writes. Oh interesting, So you 131 00:06:44.319 --> 00:06:47.279 might have like a really fast readoptimized database for your 132 00:06:47.319 --> 00:06:50.240 queries and then a more robust one for handling changes. 133 00:06:50.720 --> 00:06:52.519 It's all about choosing the right tool for the job. 134 00:06:52.600 --> 00:06:53.240 That makes sense. 135 00:06:53.399 --> 00:06:55.480 Now, CQRS can also make your code a lot simpler 136 00:06:55.519 --> 00:07:00.199 because each part has a single well defined responsibility. Seaking 137 00:07:00.199 --> 00:07:03.079 of well defined responsibilities. The book finally dives into the 138 00:07:03.160 --> 00:07:08.279 clus plus specific aspects of software architecture, starting with the 139 00:07:08.319 --> 00:07:09.279 solid principles. 140 00:07:09.600 --> 00:07:13.560 Ah. Yes, the solid principles. Those are classic guidelines for 141 00:07:13.600 --> 00:07:17.839 writing object oriented code that's maintainable and flexible. All right, right, okay, 142 00:07:17.920 --> 00:07:19.439 let's see if I can remember what they stand for. 143 00:07:19.839 --> 00:07:25.519 Single responsibility principle, open closed principle, lisk of substitution principle, 144 00:07:26.000 --> 00:07:29.560 interface segregation principle, and dependency in version principle. 145 00:07:29.720 --> 00:07:30.319 That's all of them. 146 00:07:30.560 --> 00:07:32.759 It's a mouthful, though. Can you break down what each 147 00:07:32.800 --> 00:07:36.000 of these principles actually means in practice, especially for someone 148 00:07:36.079 --> 00:07:36.800 working with C. 149 00:07:36.879 --> 00:07:40.360 Plus plus using sure So, the single responsibility principle states 150 00:07:40.360 --> 00:07:44.839 that every class or module should have only one specific 151 00:07:45.000 --> 00:07:48.600 reason to change, keep things focused, you know, and avoid 152 00:07:48.639 --> 00:07:52.240 those massive god objects that try to do everything. They 153 00:07:52.279 --> 00:07:54.600 give some really good examples of how to refactor C 154 00:07:54.720 --> 00:07:56.959 plus plus code to follow this principle. 155 00:07:57.000 --> 00:07:59.279 Okay, and what about the open closed principle. 156 00:07:59.519 --> 00:08:02.519 So, the op close principle encourages you to design classes 157 00:08:02.519 --> 00:08:06.160 that are open for extension but closed for modification. Okay, 158 00:08:06.360 --> 00:08:09.439 you should be able to add new functionality without having 159 00:08:09.439 --> 00:08:10.680 to change existing code. 160 00:08:10.800 --> 00:08:11.160 I see. 161 00:08:11.199 --> 00:08:15.240 They demonstrate this using C plus plus interfaces and abstract classes. 162 00:08:15.639 --> 00:08:18.639 They show how you can add new implementations without breaking 163 00:08:18.680 --> 00:08:19.519 existing clients. 164 00:08:19.560 --> 00:08:21.759 It's like adding a new room to a house without 165 00:08:21.800 --> 00:08:23.000 tearing down any walls. 166 00:08:23.240 --> 00:08:25.800 Yeah, that's a great analogy. And then there's the lisk 167 00:08:25.839 --> 00:08:29.040 of substitution principle. Right, this one make sure that subtypes 168 00:08:29.040 --> 00:08:33.039 can be used interchangeably with their base types without causing 169 00:08:33.039 --> 00:08:36.279 any problems in the program. It's about ensuring your inheritance 170 00:08:36.320 --> 00:08:39.440 hierarchy makes sense and avoids unexpected behavior. 171 00:08:39.600 --> 00:08:42.960 They give C plus plus examples of how violating this 172 00:08:43.039 --> 00:08:46.440 principle can introduce those subtle bugs that make the code 173 00:08:46.559 --> 00:08:47.919 really hard to understand. 174 00:08:48.360 --> 00:08:51.399 Yeah, exactly. It seems like all these solid principles are 175 00:08:51.440 --> 00:08:54.559 really about making the code easier to maintain and adapt 176 00:08:54.600 --> 00:08:55.080 over time. 177 00:08:55.600 --> 00:08:58.759 For sure. It's all about building a solid foundation exactly. 178 00:08:58.840 --> 00:09:01.320 So next we have the interface aggregation principle. It basically 179 00:09:01.360 --> 00:09:05.320 says it's better to have smaller, more specific interfaces than big, 180 00:09:05.399 --> 00:09:06.320 monolithic ones. 181 00:09:06.399 --> 00:09:07.080 Gotcha. 182 00:09:07.240 --> 00:09:10.039 This way, clients only depend on the methods they actually use. 183 00:09:10.279 --> 00:09:10.639 Okay. 184 00:09:10.879 --> 00:09:13.080 The book has this fun example with a C plus 185 00:09:13.080 --> 00:09:16.320 plus food processor showing how to break down a complex 186 00:09:16.320 --> 00:09:19.320 interface into smaller, more manageable ones. 187 00:09:19.480 --> 00:09:21.840 Right, so, it's like having separate remotes for your TV, 188 00:09:22.080 --> 00:09:25.080 DVD player and sound system instead of one giant one 189 00:09:25.120 --> 00:09:26.240 with a button for everything. 190 00:09:26.360 --> 00:09:30.440 Yeah, that's a perfect analogy. And finally, there's the dependency 191 00:09:30.480 --> 00:09:35.159 inversion principle, which encourages you to depend on abstractions instead 192 00:09:35.159 --> 00:09:38.919 of concrete implementations. Okay, it promotes loose coupling and makes 193 00:09:38.919 --> 00:09:41.039 your code way easier to test and maintain. 194 00:09:41.360 --> 00:09:44.279 They illustrate this with some C plus plus code using 195 00:09:44.320 --> 00:09:46.639 abstract base classes and templates. 196 00:09:46.720 --> 00:09:49.600 Right yep. They show how to decouple high level modules 197 00:09:49.639 --> 00:09:50.720 from lower level ones. 198 00:09:50.919 --> 00:09:53.720 It's like building a house with interchangeable parts, so you 199 00:09:53.720 --> 00:09:56.759 can swap out the plumbing or electrical systems without affecting 200 00:09:56.759 --> 00:09:58.279 the whole structure exactly. 201 00:09:58.519 --> 00:10:01.879 All these solid principles, they really provide a strong foundation 202 00:10:02.000 --> 00:10:07.240 for designing well structured, maintainable, and flexible C plus plus code. 203 00:10:07.720 --> 00:10:11.679 So we've talked about the importance of architecture, different architectural styles, 204 00:10:11.720 --> 00:10:14.720 and now the solid principles feels like we're building up 205 00:10:14.759 --> 00:10:18.679 a pretty solid toolkit for CLUS plus software design. 206 00:10:18.840 --> 00:10:21.840 I think, so, where do we go from here? From here, 207 00:10:22.240 --> 00:10:25.600 the book shifts its focus to the real world challenges 208 00:10:25.720 --> 00:10:30.039 of building robust and scalable systems. It starts by debunking 209 00:10:30.080 --> 00:10:34.799 some common fallacies about distributed computing, assumptions that can lead 210 00:10:34.840 --> 00:10:38.960 to some pretty disastrous results if you're not careful. 211 00:10:39.039 --> 00:10:41.720 Oh yeah, those assumptions that seem so obvious in theory 212 00:10:41.840 --> 00:10:44.840 but can cause big problems in the real world exactly. Like. 213 00:10:44.879 --> 00:10:47.720 The first one they tackle is the assumption of network reliability. 214 00:10:48.039 --> 00:10:50.960 Oh right, just because something works perfectly on your local 215 00:10:51.000 --> 00:10:53.000 machine doesn't mean it will behave the same way in 216 00:10:53.039 --> 00:10:57.840 a distributed environment. Network kickups, latency issues, and even complete 217 00:10:57.879 --> 00:11:00.360 failures are bound to happen for sure, So you have 218 00:11:00.399 --> 00:11:02.759 to design for fault tolerance right from the start. 219 00:11:02.919 --> 00:11:05.559 Yeah, you can't just add it as an afterthought exactly. 220 00:11:05.960 --> 00:11:09.679 They also debunk the fallacy of assuming zero latency. Okay, 221 00:11:09.799 --> 00:11:15.000 communication between distributed systems always takes time, and ignoring that 222 00:11:15.360 --> 00:11:19.440 can lead to like performance bottlenecks and sluggish. 223 00:11:18.919 --> 00:11:22.559 Applications, and of course, the fallacy of assuming infinite bandwidth. 224 00:11:22.879 --> 00:11:26.159 Right, you can't just send unlimited amounts of data between 225 00:11:26.279 --> 00:11:29.840 systems without considering the cost and the potential for congestion. 226 00:11:30.159 --> 00:11:33.399 It's all about designing for the real world where networks 227 00:11:33.399 --> 00:11:38.960 are unreliable, communication takes time and resources are limited, exactly, 228 00:11:39.000 --> 00:11:41.240 and they even point out how these fallacies apply to 229 00:11:41.320 --> 00:11:44.159 mobile app development, where you might be dealing with weak 230 00:11:44.240 --> 00:11:46.279 signals or limited data plans. 231 00:11:46.559 --> 00:11:49.320 Yeah, it's a good reminder that the environment your software 232 00:11:49.360 --> 00:11:52.559 runs in can really impact the architecture for sure. And 233 00:11:52.600 --> 00:11:55.440 this leads to the discussion of the CAAP theorem, a 234 00:11:55.519 --> 00:11:58.080 fundamental concept in distributed systems. 235 00:11:58.200 --> 00:12:01.200 Okay, the CAAP theorem, I've definitely heard of it before, 236 00:12:01.240 --> 00:12:03.200 but honestly, I'm a little fuzzy on the details. 237 00:12:03.320 --> 00:12:06.320 Oh okay, Well, the CIP theorem states that in a 238 00:12:06.360 --> 00:12:09.200 distributed system, you can only have two out of three 239 00:12:09.240 --> 00:12:13.840 guarantees consistency, availability, and partition tolerance. 240 00:12:14.039 --> 00:12:16.080 You can't have it all. Nope, Well that makes sense, 241 00:12:16.120 --> 00:12:18.279 but can you remind me what those guarantees actually mean. 242 00:12:18.440 --> 00:12:21.399 Sure, consistency means that all the nodes in the system 243 00:12:21.480 --> 00:12:24.600 see the same data at the same time. Availability means 244 00:12:24.639 --> 00:12:28.440 the system stays operational even if some nodes fail, right, 245 00:12:28.960 --> 00:12:32.000 And partition tolerance means that the system can keep working 246 00:12:32.480 --> 00:12:35.759 even if the network connection between nodes is lost. Uh. 247 00:12:35.919 --> 00:12:37.840 Okay, that's starting to come back to me now, So 248 00:12:37.879 --> 00:12:40.799 how do you decide which two guarantees are the most important? 249 00:12:41.080 --> 00:12:44.720 Well, it really depends on the specific application and its requirements. Okay, 250 00:12:45.000 --> 00:12:47.720 And they go into different strategies for handling these trade offs, 251 00:12:47.720 --> 00:12:50.039 like replication and eventual consistency. 252 00:12:50.159 --> 00:12:54.159 So it's like choosing between a perfectly synchronized dance routine 253 00:12:54.159 --> 00:12:57.120 where everyone moves in unison. One misstep and the whole 254 00:12:57.120 --> 00:13:00.639 thing falls apart, versus a more flexible routine where everyone 255 00:13:00.679 --> 00:13:03.519 can improvise a bit but might be slightly out of 256 00:13:03.559 --> 00:13:04.360 sync at times. 257 00:13:04.480 --> 00:13:07.919 That's a great analogy. And within replication they explore different 258 00:13:07.919 --> 00:13:12.200 approaches like master, slave and multi master. Okay, they explain 259 00:13:12.240 --> 00:13:14.679 the proth and cons of each, gotcha. They also talk 260 00:13:14.720 --> 00:13:17.440 about que based load leveling as a way to handle 261 00:13:17.480 --> 00:13:21.679 those spikes in traffic and prevent individual services from getting overwhelmed. 262 00:13:21.840 --> 00:13:24.919 Right. It's all about distributing the workload effectively and making 263 00:13:24.919 --> 00:13:28.960 sure the system stays responsive even under heavy load. 264 00:13:29.120 --> 00:13:32.879 Exactly. They even describe this back pressure technique where a 265 00:13:33.080 --> 00:13:37.320 service can signal its upstream dependencies to slow down if 266 00:13:37.360 --> 00:13:38.600 it's starting it to overload it. 267 00:13:38.840 --> 00:13:41.039 Oh wow, it's like a traffic light system for. 268 00:13:41.039 --> 00:13:43.759 Your software exactly, prevents a total meltdown. 269 00:13:44.000 --> 00:13:46.799 I love these real world analogies. They really help make 270 00:13:46.840 --> 00:13:50.000 these concepts easier to understand. So what else do they 271 00:13:50.000 --> 00:13:52.879 cover in terms of building those robust and scalable systems. 272 00:13:52.960 --> 00:13:57.039 They dive into fold detection and mitigation strategies, emphasizing how 273 00:13:57.080 --> 00:14:00.039 important it is to design for failure. Makes sense to 274 00:14:00.080 --> 00:14:04.480 talk about techniques like the heartbeat mechanism, where services periodically 275 00:14:04.600 --> 00:14:06.639 check in with each other to make sure they're still alive. 276 00:14:07.360 --> 00:14:10.519 And then they introduce the sidecar pattern, where a separate 277 00:14:10.559 --> 00:14:14.279 process runs alongside your main service. Okay, the sidecar handles 278 00:14:14.279 --> 00:14:16.759 things like logging, monitoring, and networking. 279 00:14:16.879 --> 00:14:19.759 The sidecar pattern sounds interesting. Why is it so beneficial? 280 00:14:20.000 --> 00:14:22.440 Well, the really cool thing about the sidecar pattern is 281 00:14:22.440 --> 00:14:25.879 that it lets you separate those infrastructure concerns from your 282 00:14:25.879 --> 00:14:29.039 core application logic. Oh see, it's like having a copilot 283 00:14:29.200 --> 00:14:32.559 that handles all the navigation and communication while you focus 284 00:14:32.600 --> 00:14:33.360 on flying. 285 00:14:33.039 --> 00:14:35.759 The plane right, So it keeps the core application lean 286 00:14:35.919 --> 00:14:37.320 and focused exactly. 287 00:14:37.960 --> 00:14:40.919 And they even mention tools like envoy Proxy, which can 288 00:14:40.919 --> 00:14:44.159 act as a sidecar. It gives you features like load balancing, 289 00:14:44.200 --> 00:14:47.360 circuit braking, and tracing without you having to write all 290 00:14:47.360 --> 00:14:48.240 that code yourself. 291 00:14:48.360 --> 00:14:51.879 That's pretty handy. It sounds like leveraging existing tools and 292 00:14:51.960 --> 00:14:54.600 frameworks is a key part of being an effective C 293 00:14:54.759 --> 00:14:58.480 plus plus architect, absolutely so, building on that idea, they 294 00:14:58.519 --> 00:15:02.960 shift gears to talk about mod architectural approaches, specifically cloud 295 00:15:03.039 --> 00:15:06.000 native design. They say you should treat the cloud like 296 00:15:06.039 --> 00:15:10.200 an operating system, abstracting away all the underlying infrastructure. Right. 297 00:15:10.600 --> 00:15:14.360 That sounds like a really powerful way to simplify development 298 00:15:14.399 --> 00:15:15.000 and deployment. 299 00:15:15.320 --> 00:15:18.279 It is, and they explain the different cloud service models 300 00:15:18.320 --> 00:15:22.960 like ii PIA, SAWS, and figs, giving some real world 301 00:15:23.039 --> 00:15:26.039 use cases for each. They also go into techniques like 302 00:15:26.159 --> 00:15:30.720 load balancing and service discovery, highlighting how reverse proxies work. 303 00:15:30.759 --> 00:15:34.000 And what about containers and container orchestration. Those seem to 304 00:15:34.039 --> 00:15:35.320 be all the rage these days. 305 00:15:35.399 --> 00:15:38.399 They cover those too. Really yeah. They introduce the concepts 306 00:15:38.440 --> 00:15:43.159 of containers and orchestration, mentioning popular tools like Docker, Kubernetes, 307 00:15:43.480 --> 00:15:46.559 and Docker Swarm. It's like having a bunch of tiny, 308 00:15:46.919 --> 00:15:50.639 self contained servers that you can easily deploy and manage. 309 00:15:50.720 --> 00:15:53.200 That's a great way to visualize it, like packing up 310 00:15:53.200 --> 00:15:55.799 your application with all its dependencies into a neat little 311 00:15:55.799 --> 00:15:58.120 box that you can ship anywhere exactly. I love it. 312 00:15:58.159 --> 00:16:01.039 But they also point out some of the downside of containers. Oh, 313 00:16:01.440 --> 00:16:05.639 like security concerns for example, and limited portability for applications 314 00:16:05.639 --> 00:16:08.759 that aren't designed for Linux. It's important to know that 315 00:16:08.840 --> 00:16:11.480 trade offs before you go all in on containers. 316 00:16:11.559 --> 00:16:14.200 Yeah, like anything else in software development, there's no one 317 00:16:14.240 --> 00:16:16.840 size fits all solution. You have to pick the right 318 00:16:16.919 --> 00:16:20.360 tools and approaches for what you're trying to build exactly. 319 00:16:20.799 --> 00:16:23.240 And that brings us to another important point. They raise 320 00:16:23.919 --> 00:16:26.279 the danger of premature optimization. 321 00:16:26.480 --> 00:16:27.679 Oh yeah, I've heard of that. 322 00:16:27.960 --> 00:16:31.879 Well. Performance is definitely important. They warn against getting too 323 00:16:31.919 --> 00:16:34.399 bogged down in it early in the development process. 324 00:16:34.519 --> 00:16:35.000 Makes sense. 325 00:16:35.279 --> 00:16:38.720 It's usually better to focus on writing clear, correct, and 326 00:16:38.799 --> 00:16:43.279 maintainable code first and then only optimize the parts that 327 00:16:43.320 --> 00:16:44.080 actually need it. 328 00:16:44.320 --> 00:16:48.960 So find that sweet spot between performance and maintainability right now. 329 00:16:49.000 --> 00:16:51.000 Before we move on to some of the practical C 330 00:16:51.159 --> 00:16:55.279 plus plus techniques for memory management and performance optimization. There 331 00:16:55.320 --> 00:16:58.639 are two other crucial aspects of software development that they highlight, 332 00:16:59.200 --> 00:17:00.919 documentation and API design. 333 00:17:01.080 --> 00:17:03.720 Those are often overlooked, but they're so important for any 334 00:17:03.720 --> 00:17:07.119 successful project, especially as the codebase grows and more people 335 00:17:07.119 --> 00:17:09.480 get involved. Absolutely, so what do they have to say 336 00:17:09.519 --> 00:17:10.000 about those? 337 00:17:10.119 --> 00:17:12.880 They emphasize how critical it is to have well documented 338 00:17:12.920 --> 00:17:17.759 code and well designed APIs, especially for complex C plus 339 00:17:17.799 --> 00:17:19.279 plus projects. 340 00:17:18.839 --> 00:17:19.319 Makes sense. 341 00:17:19.400 --> 00:17:23.680 They introduce tools like doxygen they can automatically generate documentation 342 00:17:23.799 --> 00:17:26.039 from your code comments. Oh cool, it makes it so 343 00:17:26.119 --> 00:17:29.160 much easier to keep your documentation up to date. Yeah. 344 00:17:29.200 --> 00:17:32.319 They also highlight some best practices for API design, you know, 345 00:17:32.359 --> 00:17:37.079 like using clear naming conventions, handling errors consistently, and really 346 00:17:37.119 --> 00:17:39.599 thinking about how developers are actually going to use your code. 347 00:17:39.759 --> 00:17:42.759 So it's all about making the code easier to understand, 348 00:17:43.039 --> 00:17:46.200 use and maintain, not just for yourself but for anyone 349 00:17:46.279 --> 00:17:47.640 who might work with it in the future. 350 00:17:47.880 --> 00:17:48.359 Exactly. 351 00:17:48.480 --> 00:17:51.480 That's great. And finally we come to a topic that's 352 00:17:51.599 --> 00:17:57.319 super important these days, security considerations for C plus plus applications. 353 00:17:58.119 --> 00:18:01.400 It's not enough to bitter and systems that a fast 354 00:18:01.440 --> 00:18:04.000 and efficient hope. They need to be secure as well. 355 00:18:04.079 --> 00:18:08.880 Definitely. Security breaches can be devastating for companies and individual users. Absolutely, 356 00:18:09.000 --> 00:18:11.359 So what are some key takeaways from the book on 357 00:18:11.440 --> 00:18:11.960 this front? 358 00:18:12.200 --> 00:18:15.759 Well, they cover a whole bunch of common vulnerabilities buffer overflows, 359 00:18:16.200 --> 00:18:18.680 SEQL injection, cross site scripting. 360 00:18:19.079 --> 00:18:21.480 They explain how to avoid these in your C plus 361 00:18:21.480 --> 00:18:25.480 plus code and introduce some tools and techniques for secure coding. 362 00:18:26.000 --> 00:18:28.839 They talk about static analysis tools, which help you find 363 00:18:28.880 --> 00:18:33.240 potential vulnerabilities early on nice. They also discuss fuzz testing, 364 00:18:33.640 --> 00:18:37.039 which basically tries to break your code by feeding at 365 00:18:37.160 --> 00:18:42.240 unexpected inputs. Interesting, and sandboxing, which isolates your code from 366 00:18:42.279 --> 00:18:44.519 the rest of the system to limit the damage if 367 00:18:44.519 --> 00:18:45.119 there's an attack. 368 00:18:45.240 --> 00:18:47.839 So it sounds like a multi layered approach to security 369 00:18:47.920 --> 00:18:51.599 is essential, from secure coding practices to using tools and 370 00:18:51.640 --> 00:18:54.240 techniques to find and fix vulnerabilities. 371 00:18:54.400 --> 00:18:57.000 Absolutely, and they even point out how important it is 372 00:18:57.079 --> 00:19:00.559 to manage your dependency securely. You could write perfect secure 373 00:19:00.640 --> 00:19:03.920 code yourself, but if you include a third party library 374 00:19:03.920 --> 00:19:07.039 that has a vulnerability, it can compromise your whole system. 375 00:19:07.079 --> 00:19:09.240 Oh right, So it's like making sure the foundation of 376 00:19:09.240 --> 00:19:12.119 your house is solid. If there are cracks in the foundation, 377 00:19:12.160 --> 00:19:13.920 it doesn't matter how nice the rest of the house is. 378 00:19:14.160 --> 00:19:14.680 Exactly. 379 00:19:14.839 --> 00:19:17.200 So, we've covered a lot of ground here. Where do 380 00:19:17.279 --> 00:19:18.039 we go from here? 381 00:19:18.240 --> 00:19:20.960 Well, from here, the book actually dives into some of 382 00:19:20.960 --> 00:19:25.359 the more practical C plus plus techniques. 383 00:19:25.680 --> 00:19:27.720 Oh perfect. I was hoping we'd get to the nuts 384 00:19:27.720 --> 00:19:29.799 and bolts, you know, stuff. 385 00:19:29.559 --> 00:19:34.720 For building efficient, robust c plus plus applications exactly. And 386 00:19:34.799 --> 00:19:37.440 earlier you mentioned that you were intrigued by that winking 387 00:19:37.480 --> 00:19:39.039 out memory technique. 388 00:19:38.599 --> 00:19:41.160 Right, yeah, it really caught my attention. It sounds like 389 00:19:41.200 --> 00:19:44.359 something straight out of like a magic show or something. 390 00:19:44.519 --> 00:19:47.319 Right. Well, it's definitely an interesting technique, Okay, especially for 391 00:19:47.400 --> 00:19:51.680 performance critical applications. I see. So, imagine you have a 392 00:19:51.680 --> 00:19:54.920 block of memory, right, and you've created a bunch of 393 00:19:54.920 --> 00:19:58.559 objects in it. Traditionally, you'd have to call the destructor 394 00:19:58.640 --> 00:20:02.599 on each object one by one before you could release. 395 00:20:02.359 --> 00:20:04.279 The memory, right Okay, yeah, that makes sense. 396 00:20:04.359 --> 00:20:07.880 Well, winking out memory basically lets you skip all those 397 00:20:07.960 --> 00:20:11.400 individual destructions. You just release the whole block at once. Wow, 398 00:20:11.960 --> 00:20:13.799 And that can save a lot of time potentially. 399 00:20:13.880 --> 00:20:16.440 So it's like hitting the reset button on the whole 400 00:20:16.519 --> 00:20:20.319 block of memory instead of carefully cleaning up each individual 401 00:20:20.359 --> 00:20:21.680