Forgetting Java: Why Java Should Die in Flames and Take its Developers Along

Video available from here: https://www.youtube.com/watch?v=LOcLwnV4Z2k
Java is old. Java is verbose. Java is ugly. Java is mocked and ridiculed by everyone and their dog. Hell, Java is dead. Well it's not but I'm preaching to the choir. Or am I? However convenient to say so, it's not exclusively Oracle to blame for Java's current state of the art. Java developers are guilty of laziness (the wrong kind), not questioning the tools they use (wrong again), following patterns (pretty much the right kind) they believe are blessed upon them yadda yadda yadda. Yet the communities around languages we find to be even lesser than Java offer world of a difference. The talk shows the tools, experiences and mindset we lack in the Java world. The virtues present elsewhere but needed here for Java to wipe the "enterprise-grade" solutions off the face of the world. Let's do this people. Let's do the right thing and get rid of the "enterprise" Java developers.

Transcript

1. Forgetting JAVA Why Java Should Die in Flames and Take its Developers Along Piotr Limanowski @peel @peel #tricityjug 1
2. PART I IS JAVA DEAD? @peel #tricityjug 2
3. Nope. @peel #tricityjug 3
4. Java might be @peel #tricityjug 4
5. dy•ing (dīˈĭng) v. Present participle of die. adj. About to die: dying language. @peel #tricityjug 5
6. dying by "verbosity" "poor type inference" "weak type system" "low-level support for concurrency/parallelism" "dependency hell" "OSS mostly comes from android & enterprises" @peel #tricityjug 6
7. If programming is going to be the thing I spend my time on, it damn well better be awesome. — David Heinemeier Hansen @peel #tricityjug 7
8. But, really... @peel #tricityjug 8
9. Is Java dead? @peel #tricityjug 9
10. COBOL @peel #tricityjug 10
11. TO @peel #tricityjug 11
12. OTHER LANGUAGES @peel #tricityjug 12
13. COBOL TO JAVA TRANSPILER @peel #tricityjug 13
14. Why? @peel #tricityjug 14
15. Java does not change. @peel #tricityjug 15
16. Why not C then? @peel #tricityjug 16
17. source & binary compatible since @peel #tricityjug 17
18. FOREVER @peel #tricityjug 18
19. type erasure @peel #tricityjug 19
20. let's change @peel #tricityjug 20
21. attract those crazy, eager, young, passionate, enthusiastic — someone, somewhere, someday @peel #tricityjug 21
22. Y U NO CHANGE? @peel #tricityjug 22
23. missing: happiness @peel #tricityjug 23
24. PROFFESSIONAL SINNERS @peel #tricityjug 24
25. PROFFESSIONAL ENTERPRISE SINNERS @peel #tricityjug 25
26. val virtues = "crazy" :: "eager" :: "young" :: "passionate" :: "enthusiastic" :: "happy" Nil virtues.dropWhile(wat) def wat = { @peel #tricityjug 26
27. PART II THE SINS @peel #tricityjug 27
28. IGNORANCE @peel #tricityjug 28
29. shell @peel #tricityjug 29
30. multiplexer tmux shell ZSH w/ prezto editor spacemacs sane defaults: skwp/dotfiles @peel #tricityjug 30
31. test feedback REPL @peel #tricityjug 31
32. REPL driven development @peel #tricityjug 32
33. 1. experiment in repl 2. write test 3. [opt] how to make test pass in repl? 4. implement 5. refactor @peel #tricityjug 33
34. gui git client? @peel #tricityjug 34
35. then how about... @peel #tricityjug 35
36. smart prompt multiple sessions session preserving quick file changes project generation finding files | operator microservices @peel #tricityjug 36
37. CLI ALL THE THINGS @peel #tricityjug 37
38. Java can't into shell. Properly. @peel #tricityjug 38
39. Grass is always greener: codegangsta/cli @peel #tricityjug 39
40. package main import ( "os" "github.com/codegangsta/cli" //THIS ) func main() { app := cli.NewApp() app.Name = "greet" app.Usage = "fight the loneliness!" app.Flags = []cli.Flag { cli.StringFlag{ Name: "lang", Value: "english", Usage: "language for the greeting", }, } app.Action = func(c *cli.Context) { name := "someone" if len(c.Args()) > 0 { name = c.Args()[0] } if c.String("lang") == "spanish" { println("Hola", name) } else { println("Hello", name) } } app.Run(os.Args) } @peel #tricityjug 40
41. Commander.rb Shell scopt.scala @peel #tricityjug 41
42. version management @peel #tricityjug 42
43. $ rvm install 2.2.3 $ rvm use 2.2.3 $ cd .. $ rvm install 2.2.4 $ rvm use 2.2.0 --default @peel #tricityjug 43
44. jenv.io @peel #tricityjug 44
45. distribution @peel #tricityjug 45
46. OS packages self-contained fatjars containers @peel #tricityjug 46
47. App Servers are DEAD @peel #tricityjug 47
48. Server version dependency? @peel #tricityjug 48
49. Server monitoring? @peel #tricityjug 49
50. Call home @peel #tricityjug 50
51. Dead man's switch @peel #tricityjug 51
52. Status page @peel #tricityjug 52
53. DEV W/O OPS @peel #tricityjug 53
54. snowflake dev @peel #tricityjug 54
55. every hour is Ship It hour @peel #tricityjug 55
56. Continuous Delivery — Humble, Jez; Farley, David, Addison-Wesley, 2011 @peel #tricityjug 56
57. Release It! — Nygard, Michael, Pragmatic Publishing, 2007 @peel #tricityjug 57
58. 2007 @peel #tricityjug 58
59. bulkheading @peel #tricityjug 59
60. circuit breakers @peel #tricityjug 60
61. @peel #tricityjug 61
62. Logging (frameworks) @peel #tricityjug 62
63. Timestamp | Status | Entity Id | What happened | What did user do @peel #tricityjug 63
64. EASY NOT SIMPLE @peel #tricityjug 64
65. Build tools @peel #tricityjug 65
66. Maven <project xmlns="http://maven.apache.org/POM/4.0.0" ...> ... </project> @peel #tricityjug 66
67. Maven 17 <project xmlns="http://maven.apache.org/POM/4.0.0" ...> ... 1565 </project> @peel #tricityjug 67
68. 1565 @peel #tricityjug 68
69. <PARENT> ! Separation? @peel #tricityjug 69
70. Gradle 1 apply plugin: 'java' @peel #tricityjug 70
71. GREAT SUCCESS @peel #tricityjug 71
72. $ ls gradlew/ src/ build.gradle gradle.properties gradlew gradlew.bat settings.gradle @peel #tricityjug 72
73. Ant 25 <project name="Lang" default="compile" basedir="."> ... 233 </project> @peel #tricityjug 73
74. If I knew then what I know now, I would have tried using a real scripting language — James Duncan Davidson (creator of Ant) @peel #tricityjug 74
75. XML @peel #tricityjug 75
76. Grass is always greener: Rake @peel #tricityjug 76
77. rails/rails 67 lines of code @peel #tricityjug 77
78. task default: %w[test] task :test do ruby "test/unittest.rb" end @peel #tricityjug 78
79. Sample @peel #tricityjug 79
80. Grass is always greener: Mix (Elixir) @peel #tricityjug 80
81. mix new my_project --module MyProject vim mix.exs mix deps.get npm install @peel #tricityjug 81
82. Dependency management @peel #tricityjug 82
83. 1565 XML @peel #tricityjug 83
84. Grass is always greener: Bundler @peel #tricityjug 84
85. $ gem install bundler $ bundle init source 'https://rubygems.org' gem 'nokogiri' gem 'rails' gem 'rack', '>=1.0' gem 'thin', '~>1.1' gem 'globalid', github: 'rails/globalid', branch: 'master' @peel #tricityjug 85
86. Grass is always greener: Mix (Elixir) @peel #tricityjug 86
87. $ mix phoenix.server defmodule Chat.Mixfile do use Mix.Project def project do [app: :chat, version: "0.0.1", elixir: "~> 1.0", elixirc_paths: ["lib", "web"], compilers: [:phoenix] ++ Mix.compilers, deps: deps] end def application do [mod: {Chat, []}, applications: [:phoenix, :phoenix_html, :cowboy, :logger]] end def deps do [{:phoenix, "~> 0.17"}, {:phoenix_html, "~> 2.1"}, {:phoenix_live_reload, "~> 1.0"}, {:phoenix_ecto, "~> 0.9"}, {:postgrex, ">= 0.0.0"}, {:cowboy, "~> 1.0"}] end end @peel #tricityjug 87
88. Web Frameworks @peel #tricityjug 88
89. (Don't) fight the HTTP @peel #tricityjug 89
90. Java EE is a dead fish ! @peel #tricityjug 90
91. @Spring @peel #tricityjug 91
92. Thanks to @Annotations, @Progress is @Unstoppable! — annotationmania.com @peel #tricityjug 92
93. spring boot w/ velocity @peel #tricityjug 93
94. Dropwizard no magic involved @peel #tricityjug 94
95. Grass is always greener: Phoenix @peel #tricityjug 95
96. $ mix phoenix.new hello_phoenix $ cd hello_phoenix $ mix phoenix.server @peel #tricityjug 96
97. FALSE IDOLS WAY TOO OFTEN @peel #tricityjug 97
98. GOF Design patterns @peel #tricityjug 98
99. It's good to know them. @peel #tricityjug 99
100. It's essential to understand them. @peel #tricityjug 100
101. FINALE @peel #tricityjug 101
102. Update your tools Look beyond the fence Question everything Kill the old Have fun @peel #tricityjug 102
103. One last thing... @peel #tricityjug 103
104. _INASWAN @peel #tricityjug 104
105. HAVE FUN @peel #tricityjug 105
106. HAKUNA MATATA THANKS @peel #tricityjug 106