Practical Elixir through Phoenix
Exploring useful Elixir features and use cases, through using Phoenix
NO BOUNDRIES
Erlang? OTP? Elixir? Phoenix?
NO LAUNDRY LIST
It can do this, and it can do that!
NO SYNTAX
Well, just a little
Erlang
- 2M connections
- 400 million vs 30
- 99.9...9% Uptime
- Live code reload
- Network transparency (kinda)
Benchmarks- Wait for it ...
- https://blog.whatsapp.com/196/1-million-is-so-2011
- http://stackoverflow.com/questions/8426897/erlangs-99-9999999-nine-nines-reliability
- https://www.manning.com/books/elixir-in-action
Near-legendary stories
| Deployment | Docker | Erlang |
| Monitoring/Debugging | Even more stuff | Erlang |
Elixir
- General purpose programming language
- Erlang, Ruby, Clojure
- Concurrent, Process-oriented, Functional
- Everything is an Expression™
- Young, clean, elixir
What Wikipedia has to say
https://en.wikipedia.org/wiki/Elixir_(programming_language)
Concurrency
- OTP
- Actor model
- Shared Nothing™
- Fair use
- GC
- Supervision tree
- Distributed
- BYOT
- Erlport
- NIF
- Drivers (IPC)
- Ports
en.wikipedia.org/wiki/Shared_nothing_architecture
erlport.org
erlang.org/doc/tutorial/introduction.html
github.com/koudelka/visualixir
Scalability
- Vertical Scalability
- Horizontal Scalability
Testing
- Absolute must
- Know your lingo
- Simple DI
I will fight against mocks, stubs and YAML in Elixir with all my... friendliness and energy to promote proper education on those topics.
— José Valim (@josevalim)
https://gist.github.com/bcardarella/0c59378615779263798f
Misconceptions
- Elixir isn't mature
- Elixir is fast!
- Elixir is complicated
Phoenix
-
use Elixir
- RoR-inspired, without the baggage
- Minimal, maintained, readable
- Presence is coming
- Let's look at ((-- Channels --))
Defacto elixir web framework
http://www.phoenixframework.org/
Channels
- Websockets
- Subscribe to topics
- Client libraries in C#, Java, Swift, ... etc
Soft-realtime for the web
Demos
Taking a sip
Monitoring
NSA Certified
https://github.com/pinterest/elixometer
Distributed
Drooooooooooll
https://vimeo.com/53221562
GameServer
How Dama server works
- Actor-based design
- Erlang interoperability (erlport)
- Bots and FSMs
RECAP
Productive
Fault Tolerant • Self-healing
Concurrent • Responsive
Scalable • Distributed
Immutable • Simple