A terrible solution to the Chapter 22 exercise in Joe's Programming Erlang (2nd edition). Read the book if you haven't already. It's good!
Follow the Elixir Installation Guide to install Elixir.
Clone the repository, install dependencies, run tests, ....
$ git clone https://github.com/lgmfred/jobcenter.git
$ cd jobcenter
$ mix deps.get
$ mix test
$ mix docsStart the IEx shell and the server. Confirm there are no jobs done, in queue, or in progress.
iex(1)> {:ok, pid} = JobCenter.start_link()
{:ok, #PID<0.235.0>}
iex(2)> JobCenter.get_queue_list(pid)
[]
iex(3)> JobCenter.get_progress_list(pid)
[]
iex(4)> JobCenter.get_done_list(pid)
[]Lets add three jobs to queue and check the three lists.
iex(5)> JobCenter.add_job(pid, fn -> :one end)
1
iex(6)> JobCenter.add_job(pid, fn -> :two end)
2
iex(7)> JobCenter.add_job(pid, fn -> :three end)
3
iex(8)> JobCenter.get_queue_list(pid)
[
{1, #Function<45.65746770/0 in :erl_eval.expr/5>},
{2, #Function<45.65746770/0 in :erl_eval.expr/5>},
{3, #Function<45.65746770/0 in :erl_eval.expr/5>}
]
iex(9)> JobCenter.get_progress_list(pid)
[]
iex(10)> JobCenter.get_done_list(pid)
[]How about we request for 2 jobs, and tell the server we're done with one.
iex(11)> {id1, fun1} = JobCenter.work_wanted(pid)
{1, #Function<45.65746770/0 in :erl_eval.expr/5>}
iex(12)> {id2, fun2} = JobCenter.work_wanted(pid)
{2, #Function<45.65746770/0 in :erl_eval.expr/5>}
iex(13)> JobCenter.get_progress_list(pid)
[
{2, #Function<45.65746770/0 in :erl_eval.expr/5>},
{1, #Function<45.65746770/0 in :erl_eval.expr/5>}
]
iex(14)> JobCenter.job_done(pid, id1)
:okCurrent state of the server.
iex(15)> JobCenter.get_done_list(pid)
[{1, #Function<45.65746770/0 in :erl_eval.expr/5>}]
iex(16)> JobCenter.get_progress_list(pid)
[{2, #Function<45.65746770/0 in :erl_eval.expr/5>}]
iex(17)> JobCenter.get_queue_list(pid)
{3, #Function<45.65746770/0 in :erl_eval.expr/5>}- Processes
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