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Uploaded bySvein Fidjestøl
Introduction to Phoenix Framework (Elixir) 2016-01-07
The document discusses the Phoenix Framework, an Elixir web framework inspired by Ruby on Rails. It provides a productive environment for building web applications that does not compromise speed and maintainability. The Phoenix Framework builds on technologies like Elixir, Erlang, Plug, and Ecto to provide features like MVC architecture, high performance, concurrency, and database integration. It has seen growing adoption since its initial release in 2014 and powers high traffic sites like Bleacher Report.
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Introduction to Phoenix Framework (Elixir) 2016-01-07
- 1. Phoenix Framework (Elixir) Aproductive web framework that does not compromise speed and maintainability Svein Fidjestøl Webstep Fokus January 2016
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- 3. Timeline 1986: Erlang 2012:Elixir 2015: Phoenix Framework 2015: 3 GHz, 8(16) Cores2002: 3 GHz, 1 Core1986: 0.016 GHz, 1 Core
- 4. Elixir Modern programming language ErlangVirtual Machine (BEAM) Erlang compatible Battle-tested concurrency and distribution model IEx: Interactive Shell Mix: Build and package management tool
- 5. Elixir 2012: R&D projectat Plataformatec (Brazil). First public release. 2014: Version 1.0.0. Some real-world usage of Elixir in production systems. 2016: Version 1.2.0
- 6. Elixir In Python " ".join(map(str.capitalize,"hello_there_world".split("_"))) In Elixir "hello_there_world" |> String.split("_") |> Enum.map(&String.capitalize/1) |> Enum.join(" ") using the pipeline operator: |>
- 7. Elixir In C# "hello_there_world" .Split('_') .Select(x =>textInfo.ToTitleCase(x)) .Aggregate((a, b) => a + " " + b); or string.Join(" ", "hello_there_world" .Split('_') .Select(x => textInfo.ToTitleCase(x)))
- 8. Erlang Used in 50% of all telecom switches Erlang Virtual Machine (BEAM) Massively Scalable High Availability Actor Model Unfamiliar syntax -- Erlang started life as a modified Prolog, and this shows.
- 9. Erlang 1986: Proprietary Language(Ericsson) 1995: OTP (“Open Telecom Platform”) 1998: Erlang/OTP Open Sourced 2008: Facebook Chat 2010: WhatsApp Other: RabbitMQ, CouchDB, Riak, Yahoo delicious.com, Pinterest, Amazon SimpleDB
- 10. Erlang Functions are definedbasically by a mathematical formula area({square, Side}) -> Side * Side; area({circle, Radius}) -> math:pi() * Radius * Radius. “square” and “circle” are atoms since they start with a lowercase letter “Side” and “Radius” are variables since they start with an uppercase letter
- 11. Erlang Decode TCP segments: decode(<<SourcePort:16, DestinationPort:16, SequenceNumber:32, AckNumber:32, DataOffset:4, _Reserved:4, Flags:8, WindowSize:16, Checksum:16, UrgentPointer:16, Payload/binary>>) when DataOffset>4 “SourcePort:16”: 16 is the number of bits to be matched to the variable SourcePort “when DataOffset>4”: Guard expression, can use simple tests and variable comparisons
- 12. Erlang Quicksort qsort([]) -> []; qsort([X|Xs])-> qsort([Y || Y <- Xs, Y =< X]) ++ [X] ++ qsort([Y || Y <- Xs, Y > X]).
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- 14. Phoenix Framework Web Frameworkfor Elixir, inspired by Ruby on Rails MVC (Model - View - Controller) Optimized for “Developer joy” and productivity Massively better performance than RoR (and concurrency actually works!) Plug Ecto Channels (Sockets), PubSub, etc.
- 15. Phoenix Framework 2014: Firstappeared 2015: Version 1.0 2016: Version 1.1
- 16. Phoenix Framework Linux, OSX, Windows PostgreSQL, MySql, SQL Server Works great on all combinations Easy to get started Easily deployed to Heroku Efficient! Can even run on a Raspberry PI 2: 540 requests per second on a $35 piece of hardware using on average 90% CPU and only 16 MB RAM
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- 18. Ecto ORM mapper, withoutthe “O” Familiar syntax Type safe query = from w in Weather, where: w.prcp > 0 or is_nil(w.prcp), select: w
- 19. Framework dependencies node.js (optional,for development) PostgreSQL (default) SQL Server also works fine using the TDS Adapter for Ecto
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- 21. Framework dependencies Elixir plug ecto Client side brunch.io(Optional, asset management)
- 22. One convenient package Don’thave to worry about dependencies Mix build system (Elixir dependencies) Hex package manager (Erlang dependencies) Code editor: e.g. Atom with language-elixir plugin
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- 24. Deployment Linux / Mac/ Windows Heroku Elixir buildpack for Heroku
- 25. Real world use BleacherReport: http://bleacherreport.com/ Second largest sport website in the world 80 million unique users per month Far above 100,000 requests per minute Highly personalized content Previously used Ruby on Rails Performance issues, needed lots of caching layers Phoenix allows a real-time strategy instead of caching
- 26. Real world use High-levelbenefits Scalability Fault-tolerance Functional Meta-programming Specific benefits List manipulation Highly personalized real-time lists
- 27.