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Diffstat (limited to 'presentations/erlang-2016')
| -rw-r--r-- | presentations/erlang-2016/.skip-subtree | 0 | ||||
| -rw-r--r-- | presentations/erlang-2016/README.md | 6 | ||||
| -rw-r--r-- | presentations/erlang-2016/presentation.md | 222 | ||||
| -rw-r--r-- | presentations/erlang-2016/presentation.pdf | bin | 1777976 -> 0 bytes | |||
| -rw-r--r-- | presentations/erlang-2016/src/hello.erl | 5 | ||||
| -rw-r--r-- | presentations/erlang-2016/src/hello1.erl | 5 | ||||
| -rw-r--r-- | presentations/erlang-2016/src/hello2.erl | 11 | ||||
| -rw-r--r-- | presentations/erlang-2016/src/hello_server.erl | 12 | ||||
| -rw-r--r-- | presentations/erlang-2016/src/hello_server2.erl | 36 | ||||
| -rw-r--r-- | presentations/erlang-2016/src/hello_sup.erl | 24 |
10 files changed, 0 insertions, 321 deletions
diff --git a/presentations/erlang-2016/.skip-subtree b/presentations/erlang-2016/.skip-subtree deleted file mode 100644 index e69de29bb2d1..000000000000 --- a/presentations/erlang-2016/.skip-subtree +++ /dev/null diff --git a/presentations/erlang-2016/README.md b/presentations/erlang-2016/README.md deleted file mode 100644 index e1b6c83b99cc..000000000000 --- a/presentations/erlang-2016/README.md +++ /dev/null @@ -1,6 +0,0 @@ -These are the slides for a presentation I gave for the Oslo javaBin meetup in -2016. - -Unfortunately there is no recording of the presentation due to a technical error -(video was recorded, but no audio). This is a bit of a shame because I think -these are some of the best slides I've ever made. diff --git a/presentations/erlang-2016/presentation.md b/presentations/erlang-2016/presentation.md deleted file mode 100644 index 526564b88268..000000000000 --- a/presentations/erlang-2016/presentation.md +++ /dev/null @@ -1,222 +0,0 @@ -slidenumbers: true -Erlang. -====== - -### Fault-tolerant, concurrent programming. - ---- - -## A brief history of Erlang - ---- - - - - -^ Telefontornet in Stockholm, around 1890. Used until 1913. - ---- - - - -^ Telephones were operated manually at Switchboards. Anyone old enough to remember? I'm certainly not. - ---- - - - -^ Eventually we did that in software, and we got better at it over time. Ericsson AXD 301, first commercial Erlang switch. But lets take a step back. - ---- - -## Phone switches must be ... - -Highly concurrent - -Fault-tolerant - -Distributed - -(Fast!) - - - ---- - -## ... and so is Erlang! - ---- - -## Erlang as a whole: - -- Unique process model (actors!) -- Built-in fault-tolerance & error handling -- Distributed processes -- Three parts! - ---- - -## Part 1: Erlang, the language - -- Functional -- Prolog-inspired syntax -- Everything is immutable -- *Extreme* pattern-matching - ---- -### Hello Joe - -```erlang -hello_joe. -``` - ---- -### Hello Joe - -```erlang --module(hello1). --export([hello_joe/0]). - -hello_joe() -> - hello_joe. -``` - ---- -### Hello Joe - -```erlang --module(hello1). --export([hello_joe/0]). - -hello_joe() -> - hello_joe. - -% 1> c(hello1). -% {ok,hello1} -% 2> hello1:hello_joe(). -% hello_joe -``` - ---- -### Hello Joe - -```erlang --module(hello2). --export([hello/1]). - -hello(Name) -> - io:format("Hello ~s!~n", [Name]). - -% 3> c(hello2). -% {ok,hello2} -% 4> hello2:hello("Joe"). -% Hello Joe! -% ok -``` - ---- - -## [fit] Hello ~~world~~ Joe is boring! -## [fit] Lets do it with processes. - ---- -### Hello Server - -```erlang --module(hello_server). --export([start_server/0]). - -start_server() -> - spawn(fun() -> server() end). - -server() -> - receive - {greet, Name} -> - io:format("Hello ~s!~n", [Name]), - server() - end. -``` - ---- - -## [fit] Some issues with that ... - -- What about unused messages? -- What if the server crashes? - ---- - -## [fit] Part 2: Open Telecom Platform - -### **It's called Erlang/OTP for a reason.** - ---- - -# OTP: An Application Framework - -- Supervision - keep processes alive! - -- OTP Behaviours - common process patterns - -- Extensive standard library - -- Error handling, debuggers, testing, ... - -- Lots more! - -^ Standard library includes lots of things from simple network libraries over testing frameworks to cryptography, complete LDAP clients etc. - ---- - -# Supervision - - - -^ Supervision keeps processes alive, different restart behaviours, everything should be supervised to avoid "process" (and therefore memory) leaks - ---- - -# OTP Behaviours - -* `gen_server` -* `gen_statem` -* `gen_event` -* `supervisor` - -^ gen = generic. explain server, explain statem, event = event handling with registered handlers, supervisor ... - ---- - -`gen_server` - ---- - -## [fit] Part 3: BEAM - -### Bogdan/Bjørn Erlang Abstract machine - ---- - -## A VM for Erlang - -* Many were written, BEAM survived -* Concurrent garbage-collection -* Lower-level bytecode than JVM -* Very open to new languages - (Elixir, LFE, Joxa, ...) - ---- - -## What next? - -* Ole's talk, obviously! -* Learn You Some Erlang! - www.learnyousomeerlang.com -* Watch *Erlang the Movie* -* (soon!) Join the Oslo BEAM meetup group - ---- - -# [fit] Questions? - -`@tazjin` diff --git a/presentations/erlang-2016/presentation.pdf b/presentations/erlang-2016/presentation.pdf deleted file mode 100644 index ec8d996704b2..000000000000 --- a/presentations/erlang-2016/presentation.pdf +++ /dev/null Binary files differdiff --git a/presentations/erlang-2016/src/hello.erl b/presentations/erlang-2016/src/hello.erl deleted file mode 100644 index 56404a0c5a20..000000000000 --- a/presentations/erlang-2016/src/hello.erl +++ /dev/null @@ -1,5 +0,0 @@ --module(hello). --export([hello_joe/0]). - -hello_joe() -> - hello_joe. diff --git a/presentations/erlang-2016/src/hello1.erl b/presentations/erlang-2016/src/hello1.erl deleted file mode 100644 index ca78261399e1..000000000000 --- a/presentations/erlang-2016/src/hello1.erl +++ /dev/null @@ -1,5 +0,0 @@ --module(hello1). --export([hello_joe/0]). - -hello_joe() -> - hello_joe. diff --git a/presentations/erlang-2016/src/hello2.erl b/presentations/erlang-2016/src/hello2.erl deleted file mode 100644 index 2d1f6c84c401..000000000000 --- a/presentations/erlang-2016/src/hello2.erl +++ /dev/null @@ -1,11 +0,0 @@ --module(hello2). --export([hello/1]). - -hello(Name) -> - io:format("Hey ~s!~n", [Name]). - -% 3> c(hello2). -% {ok,hello2} -% 4> hello2:hello("Joe"). -% Hello Joe! -% ok diff --git a/presentations/erlang-2016/src/hello_server.erl b/presentations/erlang-2016/src/hello_server.erl deleted file mode 100644 index 01df14ac57d5..000000000000 --- a/presentations/erlang-2016/src/hello_server.erl +++ /dev/null @@ -1,12 +0,0 @@ --module(hello_server). --export([start_server/0, server/0]). - -start_server() -> - spawn(fun() -> server() end). - -server() -> - receive - {greet, Name} -> - io:format("Hello ~s!~n", [Name]), - hello_server:server() - end. diff --git a/presentations/erlang-2016/src/hello_server2.erl b/presentations/erlang-2016/src/hello_server2.erl deleted file mode 100644 index 24bb934ee503..000000000000 --- a/presentations/erlang-2016/src/hello_server2.erl +++ /dev/null @@ -1,36 +0,0 @@ --module(hello_server2). --behaviour(gen_server). --compile(export_all). - -%%% Start callback for supervisor -start_link() -> - gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). - -%%% gen_server callbacks - -init([]) -> - {ok, sets:new()}. - -handle_call({greet, Name}, _From, State) -> - io:format("Hello ~s!~n", [Name]), - NewState = sets:add_element(Name, State), - {reply, ok, NewState}; - -handle_call({bye, Name}, _From, State) -> - io:format("Goodbye ~s!~n", [Name]), - NewState = sets:del_element(Name, State), - {reply, ok, NewState}. - -terminate(normal, State) -> - [io:format("Goodbye ~s!~n", [Name]) || Name <- State], - ok. - -%%% Unused gen_server callbacks -code_change(_OldVsn, State, _Extra) -> - {ok, State}. - -handle_info(_Info, State) -> - {noreply, State}. - -handle_cast(_Request, State) -> - {noreply, State}. diff --git a/presentations/erlang-2016/src/hello_sup.erl b/presentations/erlang-2016/src/hello_sup.erl deleted file mode 100644 index 7fee0928c575..000000000000 --- a/presentations/erlang-2016/src/hello_sup.erl +++ /dev/null @@ -1,24 +0,0 @@ --module(hello_sup). --behaviour(supervisor). --export([start_link/0, init/1]). - -%%% Module API - -start_link() -> - supervisor:start_link({local, ?MODULE}, ?MODULE, []). - -%%% Supervisor callbacks - -init([]) -> - Children = [hello_spec()], - {ok, { {one_for_one, 5, 10}, Children}}. - -%%% Private - -hello_spec() -> - #{id => hello_server2, - start => {hello_server2, start_link, []}, - restart => permanent, - shutdown => 5000, - type => worker, - module => [hello_server2]}. |