Slides for meet up talking about CMake, and Android NDK

1. KEEP YOUR ARMS AND
LEGS INSIDE THE MANY
PLATFORMS: NATIVE CODE
EVERYWHERE

2. int main()
I AM JIM BORDEN
Software Engineer @ Couchbase, Inc.
(Previously Sotsu, Inc.)
You can find me (anywhere) at:
@borrrden

3. 1
ARCHITECTURAL TOUR
Why things are the way that they
are

5. BUT, BUT. . .WHY?
▪ Small Team (4 people)
▪ Many platforms (6 platforms)
▪ Smaller QE (2 people shared with other
teams)
▪ Need to share as much source as possible

6. SO WHAT WERE WE DOING BEFORE?
▪ Everything above the data file level was per
platform
▪ Raw sqlite3 calls from each platform
▪ If one platform changed, there is a good
chance others would not notice

7. HOW IS THIS DIFFERENT?
▪ Everything is hidden behind an abstract
interface of operations
▪ Work is broken into logical units (open, close,
query, etc)
▪ Per platform logic very light (currently
Objective-C ~3000 LOC)

8. WHAT ABOUT ANDROID?
▪ Seven total distinct architectures
▪ Need to compile native elements for each
one the product supports
▪ What exactly is the NDK?

9. BUT WAIT, ISN’T MAINTAINING ALL THIS NATIVE CODE
HARD?
▪ Sort of, but CMake is here to help!
▪ CMake has tooling for every platform and
architecture we deploy to
▪ Let’s see an example build (OS X x64 and
Android x86 armv7 arm64)

10. 3
MAKING SURE EVERYTHING
WORKS

11. BUT WE ONLY HAVE 2 QE ENGINEERS
▪ Things need to be automated as much as
possible
▪ Push to core triggers a native build and test
run
▪ A successful native build triggers a bindings
build and test run
▪ A successful bindings build triggers a
Couchbase Lite build and test run (TODO)

12. I’LL TAKE YOU ON THE TOUR
▪ Take a look at our internal Jenkins
▪ 8 powerful machines split into dozens of VMs
with dedicated RAM / CPU
▪ Coordinating different machines for different
purposes

13. Thanks!
ANY QUESTIONS?
You can find me at:
@borrrden
jim.borden@couchbase.com

14. CREDITS
Special thanks to all the people who made and released these awesome
resources for free:
▪ Presentation template by SlidesCarnival
▪ Photographs by Unsplash