Build Systems With Go: Everything a Gopher must know

 Preface....3

Part I: The GO language....9

Chapter 1 First steps with Go....10

1.1 Save the world with Go!!!....10

1.2 Passing arguments to our program....11

1.3 Summary....19

Chapter 2 The basics....21

2.1 Packages and imports....21

2.2 Variables, constants, and enums....22

2.3 Functions....29

2.4 Pointers....34

2.5 nil and zero values....35

2.6 Loops and branches....36

2.7 Errors....43

2.8 Defer, panic, and recover....45

2.9 Init functions....48

2.10 Summary....51

Chapter 3 Arrays, slices, and maps....52

3.1 Arrays....52

3.2 Slices....53

3.3 Maps....60

3.4 Summary....63

Chapter 4 Structs, methods, and interfaces....64

4.1 Structs....64

4.2 Methods....71

4.3 Interfaces....76

4.4 Summary....82

Chapter 5 Reflection....83

5.1 reflect.Type....83

5.2 reflect.Value....88

5.3 Creating functions on the fly....94

5.4 Tags....97

5.5 The three laws of reflection....99

5.6 Summary....101

Chapter 6 Concurrency....102

6.1 Goroutines....102

6.2 Channels....104

6.3 Select....113

6.4 WaitGroup....119

6.5 Timers, tickers, and timeouts....121

6.6 Context....125

6.7 Once....134

6.8 Mutexes....136

6.9 Atomics....138

6.10 Summary....142

Chapter 7 Input/Output....143

7.1 Readers and writers....143

7.2 Reading and Writing files....147

7.3 Standard I/O....151

7.4 Summary....156

Chapter 8 Encodings....157

8.1 CSV....157

8.2 JSON....160

8.3 XML....165

8.4 YAML....172

8.5 Tags and encoding....176

8.6 Summary....182

Chapter 9 HTTP....183

9.1 Requests....183

9.2 HTTP Server....192

9.3 Cookies....195

9.4 Middleware....201

9.5 Summary....207

Chapter 10 Templates....208

10.1 Filling templates with structs....208

10.2 Actions....210

10.3 Functions....214

10.4 HTML....218

10.5 Summary....220

Chapter 11 Testing....221

11.1 Tests....221

11.2 Examples....235

11.3 Benchmarking....239

11.4 Coverage....242

11.5 Profiling....245

11.6 Summary....251

Chapter 12 Modules and documentation....252

12.1 Modules....252

12.2 Documentation....254

12.3 Summary....258

Part II: Building systems....259

Chapter 13 Protocol buffers....260

13.1 The proto file....260

13.2 Complex messages....264

13.3 Importing other proto definitions....267

13.4 Nested types....270

13.5 Type Any....272

13.6 Type Oneof....274

13.7 Maps....277

13.8 JSON....279

13.9 Summary....281

Chapter 14 gRPC....282

14.1 Definition of services....283

14.2 Creating a server....285

14.3 Creating clients....288

14.4 Streaming....290

14.5 Transcoding....310

14.6 Interceptors....317

14.7 Summary....325

Chapter 15 Logging with Zerolog....326

15.1 The log package....326

15.2 Zerolog basics....328

15.3 Zerolog settings....334

15.4 Zerolog advanced settings....340

15.5 Summary....348

Chapter 16 Command Line Interface....349

16.1 The basics....349

16.2 Arguments and Flags....352

16.3 Commands....360

16.4 Advanced features....369

16.5 Summary....379

Chapter 17 Relational databases....381

17.1 SQL in Go....381

17.2 GORM....389

17.3 Manipulate data....399

17.4 Summary....413

Chapter 18 NoSQL databases....414

18.1 Cassandra and GoCQL....414

18.2 Summary....432

Chapter 19 Kafka....433

19.1 The basics....433

19.2 Using the Confluent client....435

19.3 Using the Segmentio client....446

19.4 Using the Kafka REST API....452

19.5 Summary....462

Bibliography....467

Notes....468

Because to build a system you need more than a collection of loops, this book offers the reader a complete explanation of the most useful aspects of the Go language, and how to use them with existing tools from the Go ecosystem. Do not stay in the basics, move forward and learn how to build systems with restful APIs, gRPC messaging, powerful loggers, middleware, SQL/noSQL databases, data streaming, and more. A book written for new adopters and experienced developers.

• More than 200 runnable examples.
• Code available in GitHub (https://github.com/juanmanuel-tirado/savetheworldwithgo).
• Concise explanations from basic to advanced levels.
• Explore advanced topics: reflection, concurrency, benchmarking, profiling, etc.
• Learn how developers use Go: modules, tags, CLIs, encodings, etc.
• Learn how to build systems with gRPC, Kafka, Cassandra, MySQL, Cobra, and more.