Chapter 4
I am still working my way through this book.
The main difficulty that I am finding with chapter 4 is the scattered nature of the example code. It’s all small snippets, some of which references code in the previous chapter.
This is in addition to the Erlang => Elixir translations:
- atom => :atom
- VariableName => variable_name
- moduleName => ModuleName
Some of the Elixir functions are reordered for consistency.
#Erlang
1> gen_server:start_link({local, timeout}, timeout, [], []).
#Elixir
1> c "Timeout.ex"
2> GenServer.start_link(Timeout, [], name: :timeout)
3> GenServer.call(:timeout, {:sleep, 100})
4> GenServer.call(:timeout, {:sleep, 5001})
The GenServer will by default timeout if a message takes more than 5 seconds to respond.
Samples for Chapter 4 have been pushed to
https://github.com:chriseyre2000/scalability_ex with hash: cc8dd44
Chapter 5
The Erlang sys module can be reference from iex using :sys
The the log commands require atoms.
:sys.log(Frequency, :print)
:sys.log(Frequency, :get)
Now at hash: 830c1ea
Chapter 6
This is an odd chapter for Elixir as the Finite State Machine was considered defective and was not adapted as a wrapper. I am going to skip this chapter
Chapter 7
GenEvent has also been Deprecated
Developer Rants 