Developing Modular Software - Welcome to Hell!

Was presented by Fred Simon @freddy33 at Jenkins User Conference Israel http://lanyrd.com/scgzkf

Using software modules today is the default way of working for most systems and frameworks. With the advent of many software languages and OSS frameworks, new module systems are constantly created and new module ecosystems start to prevail. This trend is horizontal and covers operating system packages, language libraries and application modules (plugins). But while some module systems are nicer to use, others are repeating past mistakes and are a daily source for developer agony and pain. In this short talk I will present the \"lessons learned\" at JFrog, where we make software for managing software libraries and deal with many types of module systems. This talk will show what works and what doesn't work in a module system; what features can make a module ecosystem thrive or fail; and why, despite all downsides, modules are here to stay and conquer more space as the Cloud continues to grow.

Transcript

1. @jenkinsconf
2. @jenkinsconf
4.   
13. , IPS
23. DRAGON STORIES AHEAD! fAC Ddb
24. STORY NUMBER ONE f
25. , A STORY OF INDEXES +
26. , A STORY OF INDEXES + < KEPT IN WRONG PLACE >
27. Once Upon A Time…
28. Once Upon A Time… Can’t serve… searches…
29. Not anymore…
30. Look ma, no index download!
34. Have to download huge files Before Searching
35. Have to download huge files Before Searching Updated rarely
36. Have to download huge files Before Searching Updated rarely Requires special client
37. Have to download huge files Before Searching Updated rarely Requires special client Client coupled with index format
38. Have to download huge files Before Searching Updated rarely Requires special client Client coupled with index format
43. Lesson learned
44. STORY NUMBER TWO A
56. STORY NUMBER TWO (AND A HALF) AA
58. Lesson learned
66. STORY NUMBER THREE C
70. Depending on name only
71. Depending on name only
72. You knew it is coming!
84. A v1
85. A v1 E v1
86. A v1 E v1 D v1
87. A v1 B v1 E v1 D v1
88. A v1 C v1 B v1 E v1 D v1
89. A v1 C v1 B v1 D v2 E v1 D v1
90. A v1 C v1 B v1 D v2 E v1 D v1
95. Reprise…
102. Lesson learned
103. STORY NUMBER FOUR
110. Wouldn’t it be dreamy if there was a way to express version compatibility matrix?
117. Lesson learned
118. STORY NUMBER FIVE D
119. Like vodka and beer…
120. …Config. and Metadata …
121. …Just won’t mix.
125. My Project ‘A1’
126. My Project ‘A1’ <alwaysUse> <repository>MyRepo</repository> </alwaysUse> MyRepo
127. My Project ‘A1’ <dependency>B1</dependency> <alwaysUse> <repository>MyRepo</repository> </alwaysUse> MyRepo
128. My Project ‘A1’ <dependency>B1</dependency> <alwaysUse> <repository>MyRepo</repository> </alwaysUse> MyRepo Project ‘B1’
129. My Project ‘A1’ <dependency>B1</dependency> <alwaysUse> <repository>MyRepo</repository> </alwaysUse> MyRepo Project ‘B1’ BadRepo <repository>BadRepo</repository> <dependency>C1</dependency> 
130. My Project ‘A1’ <dependency>B1</dependency> <dependency>C1</dependency> <repository>MyRepo</repository> <repository>BadRepo</repository> MyRepo Project ‘B1’ BadRepo
131. My Project ‘A1’ <dependency>B1</dependency> <dependency>C1</dependency> <repository>MyRepo</repository> <repository>BadRepo</repository> MyRepo Project ‘B1’ BadRepo
133. Lesson learned
134. NO MORE STORIES, ONE MORE THING OOO fAC Ddb