Testable

.gitignore

@@ -5,6 +5,6 @@ deps
 *.plt
 erl_crash.dump
 ebin
-rel/example_project
+_rel/*
 .concrete/DEV_MODE
 .rebar

Makefile

@@ -1,10 +1,11 @@
 PROJECT = egol
 
-DEPS = edown gen_leader gproc lager
+#DEPS = edown gen_leader gproc lager
+DEPS = lager
 
-dep_gproc = git git://github.com/uwiger/gproc 0.3.1
-dep_edown = git https://github.com/esl/edown.git master
-dep_gen_leader = git https://github.com/abecciu/gen_leader_revival.git master
+#dep_gproc = git git://github.com/uwiger/gproc 0.3.1
+#dep_edown = git https://github.com/esl/edown.git master
+#dep_gen_leader = git https://github.com/abecciu/gen_leader_revival.git master
 
 include erlang.mk
 
@@ -15,5 +16,7 @@ ERLC_COMPILE_OPTS= +'{parse_transform, lager_transform}'
 ERLC_OPTS= $(ERLC_COMPILE_OPTS) +debug_info
 TEST_ERLC_OPTS= $(ERLC_COMPILE_OPTS)
 
+release: app
+	relx --vm_args "./config/vm.args"
 
 

README.md

@@ -0,0 +1,26 @@
+This repo originates from this article (link to NDC article) and the associated talk
+at NDC London 2014 (link to slideshare).
+
+Conway's Game of Life cell automaton is used to show how to think like an Erlanger.
+
+The principle of using asynchronous message passing and thinking in terms of
+protocols describing the interactions between processes is applicable to a number of
+settings, not just Erlang, but the overlay of using Erlang supervision is much easier
+and straightforward to do in Erlang.
+
+The contents of the repo has moved on from the initial version used for the article
+and the talk at NDC - even the talk code was improved from the article's - but I have
+tried to tag relevant revisions to make it easier for you to cherry pick a particular
+stage in the evolution of the code.
+
+The wiki for this repo contains a more in-depth explanation of the thinking process
+and the tools used than what you will find here with the code.
+
+Notable tags:
+* ndc1 - tag for the NDC article's code.
+
+Notable branches:
+* permanent_collector - instead of spawning a new collector for each time step, the
+  collector process is re-used. It saves so little resources (5%) that it is not
+  worth the hassle to do it.
+

config/sys.config

@@ -0,0 +1,8 @@
+[{lager, [
+  {handlers, [
+    {lager_console_backend, info},
+    {lager_file_backend, [{file, "log/error.log"}, {level, error}]},
+    {lager_file_backend, [{file, "log/console.log"}, {level, info}]}
+  ]}
+  ]}
+].

config/vm.args

@@ -0,0 +1 @@
++P 10000000

eqc_test/Makefile

@@ -0,0 +1,8 @@
+
+
+
+console: beams
+	erl -pa ../ebin ../deps/*/ebin . -config test.config
+
+beams: 
+	erlc *.erl