Finished the paxos
This commit is contained in:
parent
c97f2e9a22
commit
f9b734fa12
@ -68,7 +68,7 @@ defmodule EventualLeaderElector do
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if MapSet.size(active) == 0 do
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state
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else
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to_trust = Enum.at(MapSet.to_list(active), 0)
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to_trust = Enum.at(Enum.sort(MapSet.to_list(active)), 0)
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to_trust = getOriginalName(to_trust)
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if state.last_trust != to_trust do
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441
lib/paxos.ex
441
lib/paxos.ex
@ -1,23 +1,15 @@
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defmodule Paxos do
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def getPaxosName(name) do
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String.to_atom(Atom.to_string(name) <> "_paxos")
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end
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def getOriginalName(name) do
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String.to_atom(String.replace(Atom.to_string(name), "_paxos", ""))
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end
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def start(name, processes) do
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new_name = getPaxosName(name)
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pid = spawn(Paxos, :init, [new_name, name, processes])
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IO.puts("Starting paxos for #{name}")
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Utils.register_name(new_name, pid)
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pid = spawn(Paxos, :init, [name, name, processes])
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Utils.register_name(name, pid, false)
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end
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# Init event must be the first
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# one after the component is created
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def init(name, parent, processes) do
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processes = Enum.map(processes, fn name -> getPaxosName(name) end)
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EventualLeaderElector.start(name, processes)
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EagerReliableBroadcast.start(name, processes)
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@ -26,8 +18,20 @@ defmodule Paxos do
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parent: parent,
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processes: processes,
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leader: nil,
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value: nil,
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other_value: nil,
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instmap: %{},
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other_values: %{},
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decided: %{},
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aborted: MapSet.new(),
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timeout: MapSet.new()
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}
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run(state)
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end
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def add_inst_map(state, inst, value, pid_to_inform) do
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instmap =
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Map.put(state.instmap, inst, %{
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value: value,
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ballot: 0,
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ballot_value: nil,
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prepared_values: [],
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@ -35,107 +39,297 @@ defmodule Paxos do
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running_ballot: 0,
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accepted_ballot: nil,
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accepted_value: nil,
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decided: false,
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pid_to_inform: nil
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}
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pid_to_inform: pid_to_inform
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})
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run(state)
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%{state | instmap: instmap}
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end
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def has_finished(state, inst) do
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Map.has_key?(state.decided, inst) or inst in state.timeout or inst in state.aborted
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end
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def run(state) do
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run(
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receive do
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{:ele_trust, proc} ->
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prepare(%{state | leader: proc})
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IO.puts("#{state.name} - #{proc} is leader")
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{:propose, value, pid_to_inform} ->
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if state.value == nil do
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EagerReliableBroadcast.broadcast(state.name, {:other_propose, value})
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prepare(%{state | value: value, pid_to_inform: pid_to_inform})
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else
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%{state | pid_to_inform: pid_to_inform}
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end
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Enum.reduce(Map.keys(state.instmap), %{state | leader: proc}, fn inst, st ->
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# IO.puts("#{state.name} - looping after leader: #{inst}")
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prepare(st, inst)
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end)
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{:rb_deliver, _proc, {:other_propose, value}} ->
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%{state | other_value: value}
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{:propose, inst, value, t, pid_to_inform} ->
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IO.puts("#{state.name} - Propose #{inst}")
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{:rb_deliver, _proc, {:prepare, proc, ballot}} ->
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if ballot > state.running_ballot do
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Utils.unicast({:prepared, ballot, state.accepted_ballot, state.accepted_value}, proc)
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%{state | running_ballot: ballot}
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else
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Utils.unicast({:nack, ballot}, proc)
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cond do
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has_finished(state, inst) ->
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send(pid_to_inform, {:abort, inst})
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state
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not Map.has_key?(state.instmap, inst) ->
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EagerReliableBroadcast.broadcast(state.name, {:other_propose, inst, value})
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state = add_inst_map(state, inst, value, pid_to_inform)
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Process.send_after(self(), {:timeout, inst}, t)
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prepare(state, inst)
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state.instmap[inst].value == nil ->
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Process.send_after(self(), {:timeout, inst}, t)
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prepare(
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set_instmap(state, inst, %{
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state.instmap[inst]
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| value: value,
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pid_to_inform: pid_to_inform
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}),
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inst
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)
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true ->
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state
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end
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{:nack, ballot} ->
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if state.leader == state.name and state.ballot == ballot do
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prepare(state)
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{:rb_deliver, _proc, {:other_propose, inst, value}} ->
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state =
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if Map.has_key?(state.instmap, inst) do
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state
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else
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add_inst_map(state, inst, nil, nil)
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end
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%{state | other_values: Map.put(state.other_values, inst, value)}
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{:rb_deliver, _proc, {:prepare, proc, inst, ballot}} ->
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IO.puts("#{state.name} - prepare")
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cond do
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has_finished(state, inst) ->
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state
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not Map.has_key?(state.instmap, inst) ->
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state
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ballot > state.instmap[inst].running_ballot ->
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Utils.unicast(
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{:prepared, inst, ballot, state.instmap[inst].accepted_ballot,
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state.instmap[inst].accepted_value},
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proc
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)
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set_instmap(state, inst, %{
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state.instmap[inst]
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| running_ballot: ballot
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})
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true ->
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Utils.unicast({:nack, inst, ballot}, proc)
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state
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end
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{:prepared, ballot, accepted_ballot, accepted_value} ->
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if ballot == state.ballot do
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prepared(%{
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{:timeout, inst} ->
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EagerReliableBroadcast.broadcast(state.name, {:timeout, inst})
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state
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| prepared_values: state.prepared_values ++ [{accepted_ballot, accepted_value}]
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{:rb_deliver, _proc, {:timeout, inst}} ->
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IO.puts("#{state.name}- timeout")
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if has_finished(state, inst) do
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state
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else
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if Map.has_key?(state.instmap, inst) do
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if state.instmap[inst].pid_to_inform do
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send(state.instmap[inst].pid_to_inform, {:timeout, inst})
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end
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end
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%{
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state
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| instmap: Map.delete(state.instmap, inst),
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timeout: MapSet.put(state.timeout, inst)
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}
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end
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# {:rb_deliver, _proc, {:abort, inst}} ->
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# IO.puts("#{state.name}- abort")
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# if has_finished(state, inst) do
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# state
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# else
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# if Map.has_key?(state.instmap, inst) and state.instmap[inst].pid_to_inform != nil do
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# send(state.instmap[inst].pid_to_inform, {:abort, inst})
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# end
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# %{
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# state
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# | aborted: MapSet.put(state.aborted, inst),
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# instmap: Map.delete(state.instmap, inst)
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# }
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# end
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{:nack, inst, ballot} ->
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IO.puts("#{state.name}- nack")
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if has_finished(state, inst) do
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state
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else
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if state.leader == state.name and state.instmap[inst].ballot == ballot do
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# EagerReliableBroadcast.broadcast(state.name, {:abort, inst})
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if Map.has_key?(state.instmap, inst) and state.instmap[inst].pid_to_inform != nil do
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send(state.instmap[inst].pid_to_inform, {:abort, inst})
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end
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state
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else
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state
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end
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end
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{:prepared, inst, ballot, accepted_ballot, accepted_value} ->
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IO.puts("#{state.name}- prepared")
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if has_finished(state, inst) do
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state
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else
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if ballot == state.instmap[inst].ballot do
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state =
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set_instmap(state, inst, %{
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state.instmap[inst]
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| prepared_values:
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state.instmap[inst].prepared_values ++ [{accepted_ballot, accepted_value}]
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})
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prepared(state, inst)
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else
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state
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end
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end
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{:rb_deliver, proc, {:accept, inst, ballot, value}} ->
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IO.puts("#{state.name} accept")
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if has_finished(state, inst) do
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state
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else
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if ballot >= state.instmap[inst].running_ballot do
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Utils.unicast({:accepted, inst, ballot}, proc)
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set_instmap(state, inst, %{
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state.instmap[inst]
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| running_ballot: ballot,
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accepted_value: value,
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accepted_ballot: ballot
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})
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else
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Utils.unicast({:nack, inst, ballot}, proc)
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state
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end
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end
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{:rb_deliver, proc, {:accept, ballot, value}} ->
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if ballot >= state.running_ballot do
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Utils.unicast({:accepted, ballot}, proc)
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%{state | running_ballot: ballot, accepted_value: value, accepted_ballot: ballot}
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{:accepted, inst, ballot} ->
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IO.puts("#{state.name} accepted")
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if has_finished(state, inst) do
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state
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else
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Utils.unicast({:nack, ballot}, proc)
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state
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end
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{:accepted, ballot} ->
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if state.leader == state.name and state.ballot == ballot do
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accepted(%{state | accepted: state.accepted + 1})
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if state.leader == state.name and state.instmap[inst].ballot == ballot do
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accepted(
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set_instmap(state, inst, %{
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state.instmap[inst]
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| accepted: state.instmap[inst].accepted + 1
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}),
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inst
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)
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else
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state
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end
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{:rb_deliver, _, {:decide, value}} ->
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if state.decided == true do
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state
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else
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if state.pid_to_inform != nil do
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send(state.pid_to_inform, {:decide, value})
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end
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%{state | decided: true}
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{:get_value, inst, pid_to_inform, t} ->
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# IO.puts("#{state.name} get_value")
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cond do
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t < 0 ->
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send(pid_to_inform, {:get_value_res, inst})
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has_finished(state, inst) ->
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cond do
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inst in state.aborted ->
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send(pid_to_inform, {:get_value_res, inst})
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inst in state.timeout ->
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send(pid_to_inform, {:get_value_res, inst})
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Map.has_key?(state.decided, inst) ->
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send(pid_to_inform, {:get_value_res_actual, inst, state.decided[inst]})
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end
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true ->
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Process.send_after(self(), {:get_value, inst, pid_to_inform, t - 500}, 500)
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end
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state
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{:rb_deliver, _, {:decide, inst, value}} ->
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IO.puts("#{state.name} decided")
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if has_finished(state, inst) do
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state
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else
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if Map.has_key?(state.instmap, inst) != nil and
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state.instmap[inst].pid_to_inform != nil do
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send(state.instmap[inst].pid_to_inform, {:decision, inst, value})
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end
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%{
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state
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| decided: Map.put(state.decided, inst, value),
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instmap: Map.delete(state.instmap, inst)
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}
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end
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end
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)
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end
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def set_instmap(state, inst, instmap) do
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new_instmap = Map.put(state.instmap, inst, instmap)
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%{state | instmap: new_instmap}
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end
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#
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# Puts process in the preapre state
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#
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def prepare(state) when state.leader != state.name, do: state
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def prepare(state) when state.value == nil and state.other_value == nil, do: state
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def prepare(state, _) when state.leader != state.name, do: state
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def prepare(state) do
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ballot = state.ballot + 1
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EagerReliableBroadcast.broadcast(state.name, {:prepare, state.name, ballot})
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%{state | ballot: ballot, prepared_values: [], accepted: 0, ballot_value: nil}
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def prepare(state, inst) do
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if Map.get(state.instmap, inst) == nil and Map.get(state.other_values, inst) == nil do
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state
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else
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ballot = state.instmap[inst].ballot + 1
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EagerReliableBroadcast.broadcast(state.name, {:prepare, state.name, inst, ballot})
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set_instmap(state, inst, %{
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state.instmap[inst]
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| ballot: ballot,
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prepared_values: [],
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accepted: 0,
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ballot_value: nil
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})
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end
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end
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#
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# Process the prepared responses
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#
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def prepared(state) when state.leader != state.name, do: state
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def prepared(state, _) when state.leader != state.name, do: state
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def prepared(state) when length(state.prepared_values) > length(state.processes) / 2 + 1 do
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def prepared(state, inst) do
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if length(state.instmap[inst].prepared_values) >= floor(length(state.processes) / 2) + 1 do
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{_, a_val} =
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Enum.reduce(state.prepared_values, {0, nil}, fn {bal, val}, {a_bal, a_val} ->
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Enum.reduce(state.instmap[inst].prepared_values, {0, nil}, fn {bal, val},
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{a_bal, a_val} ->
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if a_bal > bal do
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{a_bal, a_val}
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else
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@ -145,34 +339,117 @@ defmodule Paxos do
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a_val =
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if a_val == nil do
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if state.value == nil do
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state.other_value
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if state.instmap[inst].value == nil do
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state.other_values[inst]
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else
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state.value
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state.instmap[inst].value
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end
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else
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a_val
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end
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EagerReliableBroadcast.broadcast(state.name, {:accept, state.ballot, a_val})
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%{state | ballot_value: a_val}
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end
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EagerReliableBroadcast.broadcast(
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state.name,
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{:accept, inst, state.instmap[inst].ballot, a_val}
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)
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def prepared(state), do: state
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set_instmap(state, inst, %{
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state.instmap[inst]
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| ballot_value: a_val
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})
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else
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state
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end
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end
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#
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# Process the accepted responses
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#
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def accepted(state) when state.leader != state.name, do: state
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def accepted(state, _) when state.leader != state.name, do: state
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def accepted(state) when state.accepted > length(state.processes) / 2 + 1 do
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EagerReliableBroadcast.broadcast(state.name, {:decide, state.ballot_value})
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def accepted(state, inst) do
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if state.instmap[inst].accepted >= floor(length(state.processes) / 2) + 1 do
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value = state.instmap[inst].ballot_value
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EagerReliableBroadcast.broadcast(
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state.name,
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{:decide, inst, value}
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)
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if Map.has_key?(state.instmap, inst) != nil and
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state.instmap[inst].pid_to_inform != nil do
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send(state.instmap[inst].pid_to_inform, {:decision, inst, value})
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end
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%{
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state
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| decided: Map.put(state.decided, inst, value),
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instmap: Map.delete(state.instmap, inst)
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}
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else
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state
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end
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end
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def accepted(state), do: state
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def propose(pid, inst, value, t) do
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# Utils.unicast({:propose, value}, name)
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def propose(name, value) do
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Utils.unicast({:propose, value}, getPaxosName(name))
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send(pid, {:propose, inst, value, t, self()})
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propose_loop(inst)
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end
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def propose_loop(inInst) do
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receive do
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{:timeout, inst} ->
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if inInst == inst do
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{:timeout}
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else
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propose_loop(inInst)
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end
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{:abort, inst} ->
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if inInst == inst do
|
||||
{:abort}
|
||||
else
|
||||
propose_loop(inInst)
|
||||
end
|
||||
|
||||
{:decision, inst, d} ->
|
||||
if inInst == inst do
|
||||
{:decision, d}
|
||||
else
|
||||
propose_loop(inInst)
|
||||
end
|
||||
|
||||
_ ->
|
||||
propose_loop(inInst)
|
||||
end
|
||||
end
|
||||
|
||||
def get_decision(pid, inst, t) do
|
||||
send(pid, {:get_value, inst, self(), t})
|
||||
get_decision_loop(inst)
|
||||
end
|
||||
|
||||
def get_decision_loop(inInst) do
|
||||
receive do
|
||||
{:get_value_res, inst} ->
|
||||
if inst == inInst do
|
||||
nil
|
||||
else
|
||||
get_decision_loop(inInst)
|
||||
end
|
||||
|
||||
{:get_value_res_actual, inst, v} ->
|
||||
if inst == inInst do
|
||||
v
|
||||
else
|
||||
get_decision_loop(inInst)
|
||||
end
|
||||
|
||||
_ ->
|
||||
get_decision_loop(inInst)
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
640
lib/paxos_test.ex
Executable file
640
lib/paxos_test.ex
Executable file
@ -0,0 +1,640 @@
|
||||
defmodule PaxosTest do
|
||||
# The functions implement
|
||||
# the module specific testing logic
|
||||
defp init(name, participants, all \\ false) do
|
||||
cpid = TestHarness.wait_to_register(:coord, :global.whereis_name(:coord))
|
||||
|
||||
try do
|
||||
pid = Paxos.start(name, participants)
|
||||
Process.sleep(100)
|
||||
if not Process.alive?(pid), do: raise("no pid")
|
||||
|
||||
TestHarness.wait_for(
|
||||
MapSet.new(participants),
|
||||
name,
|
||||
if(not all,
|
||||
do: length(participants) / 2,
|
||||
else: length(participants)
|
||||
)
|
||||
)
|
||||
|
||||
{cpid, pid}
|
||||
rescue
|
||||
_ -> {cpid, :c.pid(0, 2048, 0)}
|
||||
end
|
||||
end
|
||||
|
||||
defp kill_paxos(pid, name) do
|
||||
Process.exit(pid, :kill)
|
||||
:global.unregister_name(name)
|
||||
pid
|
||||
end
|
||||
|
||||
defp wait_for_decision(_, _, timeout) when timeout <= 0, do: {:none, :none}
|
||||
|
||||
defp wait_for_decision(pid, inst, timeout) do
|
||||
Process.sleep(100)
|
||||
v = Paxos.get_decision(pid, inst, 1)
|
||||
|
||||
case v do
|
||||
v when v != nil -> {:decide, v}
|
||||
nil -> wait_for_decision(pid, inst, timeout - 100)
|
||||
end
|
||||
end
|
||||
|
||||
defp propose_until_commit(pid, inst, val) do
|
||||
status = Paxos.propose(pid, inst, val, 10000)
|
||||
|
||||
case status do
|
||||
{:decision, val} -> val
|
||||
{:abort, val} -> propose_until_commit(pid, inst, val)
|
||||
_ -> nil
|
||||
end
|
||||
end
|
||||
|
||||
# Test cases start from here
|
||||
|
||||
# No failures, no concurrent ballots
|
||||
def run_simple(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
leader = (fn [h | _] -> h end).(participants)
|
||||
|
||||
if name == leader do
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
end
|
||||
|
||||
{status, v} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none do
|
||||
IO.puts("#{name}: decided #{inspect(v)}")
|
||||
else
|
||||
IO.puts("#{name}: No decision after 10 seconds")
|
||||
end
|
||||
|
||||
{status, v, 10}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# No failures, 2 concurrent ballots
|
||||
def run_simple_2(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
|
||||
if name in (fn [h1, h2 | _] -> [h1, h2] end).(participants),
|
||||
do: Paxos.propose(pid, 1, val, 10000)
|
||||
|
||||
{status, val} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# No failures, 2 concurrent instances
|
||||
def run_simple_3(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
proposers = Enum.zip((fn [h1, h2 | _] -> [h1, h2] end).(participants), [1, 2])
|
||||
proposers = for {k, v} <- proposers, into: %{}, do: {k, v}
|
||||
if proposers[name], do: Paxos.propose(pid, proposers[name], val, 10000)
|
||||
|
||||
y =
|
||||
List.to_integer(
|
||||
(fn [_ | x] -> x end).(
|
||||
Atom.to_charlist((fn [h | _] -> h end).(Map.keys(proposers)))
|
||||
)
|
||||
)
|
||||
|
||||
:rand.seed(:exrop, {y * 100 + 1, y * 100 + 2, y * 100 + 3})
|
||||
inst = Enum.random(1..2)
|
||||
{status, val} = wait_for_decision(pid, inst, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # No failures, many concurrent ballots
|
||||
def run_simple_many_1(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
Paxos.propose(pid, 2, val, 10000)
|
||||
Process.sleep(Enum.random(1..10))
|
||||
{status, val} = wait_for_decision(pid, 2, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# No failures, many concurrent ballots
|
||||
def run_simple_many_2(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
|
||||
for _ <- 1..10 do
|
||||
Process.sleep(Enum.random(1..10))
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
end
|
||||
|
||||
{status, val} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # One non-leader process crashes, no concurrent ballots
|
||||
def run_non_leader_crash(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants, true)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a, spare} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
|
||||
[leader, kill_p | spare] = participants
|
||||
|
||||
case name do
|
||||
^leader ->
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
|
||||
^kill_p ->
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
|
||||
_ ->
|
||||
nil
|
||||
end
|
||||
|
||||
spare = [leader | spare]
|
||||
|
||||
if name in spare do
|
||||
{status, val} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10, spare}
|
||||
else
|
||||
{:killed, :none, -1, spare}
|
||||
end
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
|
||||
ql =
|
||||
if name in spare do
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
ql
|
||||
else
|
||||
{:message_queue_len, -1}
|
||||
end
|
||||
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # Minority non-leader crashes, no concurrent ballots
|
||||
def run_minority_non_leader_crash(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants, true)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a, spare} =
|
||||
try do
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
|
||||
[leader | rest] = participants
|
||||
|
||||
to_kill = Enum.slice(rest, 0, div(length(participants), 2))
|
||||
|
||||
if name == leader do
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
end
|
||||
|
||||
if name in to_kill do
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
spare = for p <- participants, p not in to_kill, do: p
|
||||
|
||||
if name in spare do
|
||||
{status, val} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10, spare}
|
||||
else
|
||||
{:killed, :none, -1, spare}
|
||||
end
|
||||
end
|
||||
rescue
|
||||
_ -> {:none, :none, 10, []}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
|
||||
ql =
|
||||
if name in spare do
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
ql
|
||||
else
|
||||
{:message_queue_len, -1}
|
||||
end
|
||||
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # Leader crashes, no concurrent ballots
|
||||
def run_leader_crash_simple(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants, true)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a, spare} =
|
||||
try do
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
|
||||
[leader | spare] = participants
|
||||
[new_leader | _] = spare
|
||||
|
||||
if name == leader do
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
if name == new_leader do
|
||||
Process.sleep(10)
|
||||
propose_until_commit(pid, 1, val)
|
||||
end
|
||||
|
||||
if name in spare do
|
||||
{status, val} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10, spare}
|
||||
else
|
||||
{:killed, :none, -1, spare}
|
||||
end
|
||||
end
|
||||
rescue
|
||||
_ -> {:none, :none, 10, []}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
|
||||
ql =
|
||||
if name in spare do
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
ql
|
||||
else
|
||||
{:message_queue_len, -1}
|
||||
end
|
||||
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # Leader and some non-leaders crash, no concurrent ballots
|
||||
# # Needs to be run with at least 5 process config
|
||||
def run_leader_crash_simple_2(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants, true)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a, spare} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
leader = (fn [h | _] -> h end).(participants)
|
||||
|
||||
if name == leader do
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
spare =
|
||||
Enum.reduce(
|
||||
List.delete(participants, leader),
|
||||
List.delete(participants, leader),
|
||||
fn _, s -> if length(s) > length(participants) / 2 + 1, do: tl(s), else: s end
|
||||
)
|
||||
|
||||
leader = hd(spare)
|
||||
|
||||
if name not in spare do
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
if name == leader do
|
||||
Process.sleep(10)
|
||||
propose_until_commit(pid, 1, val)
|
||||
end
|
||||
|
||||
if name in spare do
|
||||
{status, val} = wait_for_decision(pid, 1, 10000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 10 seconds")
|
||||
|
||||
{status, val, 10, spare}
|
||||
else
|
||||
{:killed, :none, -1, spare}
|
||||
end
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
|
||||
ql =
|
||||
if name in spare do
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
ql
|
||||
else
|
||||
{:message_queue_len, -1}
|
||||
end
|
||||
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # Cascading failures of leaders and non-leaders
|
||||
def run_leader_crash_complex(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants, true)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a, spare} =
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started with #{inspect(participants)}")
|
||||
|
||||
{kill, spare} =
|
||||
Enum.reduce(participants, {[], participants}, fn _, {k, s} ->
|
||||
if length(s) > length(participants) / 2 + 1, do: {k ++ [hd(s)], tl(s)}, else: {k, s}
|
||||
end)
|
||||
|
||||
leaders = Enum.slice(kill, 0, div(length(kill), 2))
|
||||
followers = Enum.slice(kill, div(length(kill), 2), div(length(kill), 2) + 1)
|
||||
|
||||
# IO.puts("spare = #{inspect spare}")
|
||||
# IO.puts "kill: leaders, followers = #{inspect leaders}, #{inspect followers}"
|
||||
|
||||
if name in leaders do
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
if name in followers do
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
if hd(spare) == name do
|
||||
Process.sleep(10)
|
||||
propose_until_commit(pid, 1, val)
|
||||
end
|
||||
|
||||
if name in spare do
|
||||
{status, val} = wait_for_decision(pid, 1, 50000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 50 seconds")
|
||||
|
||||
{status, val, 10, spare}
|
||||
else
|
||||
{:killed, :none, -1, spare}
|
||||
end
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
|
||||
ql =
|
||||
if name in spare do
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
ql
|
||||
else
|
||||
{:message_queue_len, -1}
|
||||
end
|
||||
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
|
||||
# # Cascading failures of leaders and non-leaders, random delays
|
||||
def run_leader_crash_complex_2(name, participants, val) do
|
||||
{cpid, pid} = init(name, participants, true)
|
||||
send(cpid, :ready)
|
||||
|
||||
{status, val, a, spare} =
|
||||
try do
|
||||
receive do
|
||||
:start ->
|
||||
IO.puts("#{inspect(name)}: started")
|
||||
|
||||
{kill, spare} =
|
||||
Enum.reduce(participants, {[], participants}, fn _, {k, s} ->
|
||||
if length(s) > length(participants) / 2 + 1,
|
||||
do: {k ++ [hd(s)], tl(s)},
|
||||
else: {k, s}
|
||||
end)
|
||||
|
||||
leaders = Enum.slice(kill, 0, div(length(kill), 2))
|
||||
followers = Enum.slice(kill, div(length(kill), 2), div(length(kill), 2) + 1)
|
||||
|
||||
IO.puts("spare = #{inspect(spare)}")
|
||||
IO.puts("kill: leaders, followers = #{inspect(leaders)}, #{inspect(followers)}")
|
||||
|
||||
if name in leaders do
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
Process.sleep(Enum.random(1..5))
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
if name in followers do
|
||||
for _ <- 1..10 do
|
||||
:erlang.suspend_process(pid)
|
||||
Process.sleep(Enum.random(1..5))
|
||||
:erlang.resume_process(pid)
|
||||
end
|
||||
|
||||
Process.exit(pid, :kill)
|
||||
end
|
||||
|
||||
if hd(spare) == name do
|
||||
Process.sleep(10)
|
||||
Paxos.propose(pid, 1, val, 10000)
|
||||
end
|
||||
|
||||
if name in spare do
|
||||
for _ <- 1..10 do
|
||||
:erlang.suspend_process(pid)
|
||||
Process.sleep(Enum.random(1..5))
|
||||
:erlang.resume_process(pid)
|
||||
leader = hd(Enum.reverse(spare))
|
||||
if name == leader, do: Paxos.propose(pid, 1, val, 10000)
|
||||
end
|
||||
|
||||
leader = hd(spare)
|
||||
if name == leader, do: propose_until_commit(pid, 1, val)
|
||||
{status, val} = wait_for_decision(pid, 1, 50000)
|
||||
|
||||
if status != :none,
|
||||
do: IO.puts("#{name}: decided #{inspect(val)}"),
|
||||
else: IO.puts("#{name}: No decision after 50 seconds")
|
||||
|
||||
{status, val, 10, spare}
|
||||
else
|
||||
{:killed, :none, -1, spare}
|
||||
end
|
||||
end
|
||||
rescue
|
||||
_ -> {:none, :none, 10, []}
|
||||
end
|
||||
|
||||
send(cpid, :done)
|
||||
|
||||
receive do
|
||||
:all_done ->
|
||||
Process.sleep(100)
|
||||
|
||||
ql =
|
||||
if name in spare do
|
||||
IO.puts("#{name}: #{inspect(ql = Process.info(pid, :message_queue_len))}")
|
||||
ql
|
||||
else
|
||||
{:message_queue_len, -1}
|
||||
end
|
||||
|
||||
kill_paxos(pid, name)
|
||||
send(cpid, {:finished, name, pid, status, val, a, ql})
|
||||
end
|
||||
end
|
||||
end
|
||||
114
lib/test_harness.ex
Executable file
114
lib/test_harness.ex
Executable file
@ -0,0 +1,114 @@
|
||||
defmodule TestHarness do
|
||||
|
||||
# @compile :nowarn_unused_vars
|
||||
|
||||
# TODO: limit the number of attempts
|
||||
def wait_to_register(name, :undefined) do
|
||||
Process.sleep(10)
|
||||
wait_to_register(name, :global.whereis_name(name))
|
||||
end
|
||||
def wait_to_register(_, pid), do: pid
|
||||
|
||||
defp wait_for_set(_, n, q, _, false) when n < q, do: :done
|
||||
defp wait_for_set(procs, _, q, name, _) do
|
||||
Process.sleep(10)
|
||||
s = Enum.reduce(procs, MapSet.new,
|
||||
fn p, s -> if :global.whereis_name(p) != :undefined, do: MapSet.put(s, p), else: s end)
|
||||
(fn d -> wait_for_set(d, MapSet.size(d), q, name, name in d) end).(MapSet.difference(procs, s))
|
||||
end
|
||||
def wait_for(proc_set, my_name, q) do
|
||||
(fn d, n -> wait_for_set(d, n, q, my_name, my_name in d) end).
|
||||
(proc_set, MapSet.size(proc_set))
|
||||
end
|
||||
|
||||
def send_back_os_pid(pid) do
|
||||
send(pid, {:os_pid, :os.getpid()})
|
||||
end
|
||||
|
||||
def wait_until_up(node) do
|
||||
Process.sleep(500)
|
||||
status = Node.ping(node)
|
||||
IO.puts("#{status}")
|
||||
case status do
|
||||
:pong -> :ok
|
||||
_ -> wait_until_up(node)
|
||||
end
|
||||
end
|
||||
|
||||
def get_os_pid(node) do
|
||||
Process.sleep(1000)
|
||||
# Node.spawn(node, TestHarness, :send_back_os_pid, [self()])
|
||||
(fn pid -> Node.spawn(node,
|
||||
fn -> send(pid, {:os_pid, :os.getpid}) end) end).(self())
|
||||
receive do
|
||||
{:os_pid, os_pid} -> os_pid
|
||||
after 1000 -> get_os_pid(node)
|
||||
end
|
||||
end
|
||||
|
||||
def deploy_procs(func, config) do
|
||||
os_pids = for node <- MapSet.new(nodes(config)) do
|
||||
cmd = "elixir --sname " <> (hd String.split(Atom.to_string(node), "@")) <> " --no-halt --erl \"-detached\" --erl \"-kernel prevent_overlapping_partitions false\""
|
||||
cmd = String.to_charlist(cmd)
|
||||
# IO.puts("#{inspect cmd}")
|
||||
:os.cmd(cmd)
|
||||
# wait_until_up(node)
|
||||
get_os_pid(node)
|
||||
end
|
||||
|
||||
pids = (fn participants ->
|
||||
for {name, {node, param}} <- config do
|
||||
case node do
|
||||
:local -> Node.spawn(Node.self, fn -> func.(name, participants, param) end)
|
||||
_ -> Node.spawn(node, fn -> func.(name, participants, param) end)
|
||||
end
|
||||
end
|
||||
end).(proc_names(config))
|
||||
{pids, os_pids}
|
||||
end
|
||||
|
||||
def proc_names(config), do: for {name, _} <- config, do: name
|
||||
def nodes(config), do: for {_, {node, _}} <- config, node != :local, do: node
|
||||
|
||||
def notify_all(procs, msg) do
|
||||
for p <- procs, do: send(p, msg)
|
||||
end
|
||||
|
||||
defp sync(msg, n) do
|
||||
for _ <- 1..n do
|
||||
receive do
|
||||
^msg -> :ok
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
defp sync_and_collect(m_type, n) do
|
||||
Enum.reduce(1..n, [],
|
||||
fn _, res ->
|
||||
[h | t] = receive do
|
||||
msg -> Tuple.to_list(msg)
|
||||
end
|
||||
if h == m_type, do: [List.to_tuple(t) | res], else: res
|
||||
end)
|
||||
end
|
||||
|
||||
defp kill_os_procs(os_pids) do
|
||||
for os_pid <- os_pids, do: :os.cmd('kill -9 ' ++ os_pid ++ ' 2>/dev/null')
|
||||
end
|
||||
|
||||
# ideally should take an instance of a protocol for tested module
|
||||
def test(func, config) do
|
||||
:global.re_register_name(:coord, self())
|
||||
# pids = deploy_procs(&FloodingTest.run/2)
|
||||
{pids, os_pids} = deploy_procs(func, config)
|
||||
sync(:ready, length(config))
|
||||
notify_all(pids, :start)
|
||||
sync(:done, length(config))
|
||||
notify_all(pids, :all_done)
|
||||
# sync(:finished, length(config))
|
||||
res = sync_and_collect(:finished, length(config))
|
||||
:global.unregister_name(:coord)
|
||||
kill_os_procs(os_pids)
|
||||
res
|
||||
end
|
||||
end
|
||||
128
lib/test_script.exs
Executable file
128
lib/test_script.exs
Executable file
@ -0,0 +1,128 @@
|
||||
# Replace with your own implementation source files
|
||||
IEx.Helpers.c("utils.ex", ".")
|
||||
IEx.Helpers.c("eager_reliable_broadcast.ex", ".")
|
||||
IEx.Helpers.c("leader_elector.ex", ".")
|
||||
IEx.Helpers.c("paxos.ex", ".")
|
||||
|
||||
# Do not modify the following ##########
|
||||
IEx.Helpers.c("test_harness.ex", ".")
|
||||
IEx.Helpers.c("paxos_test.ex", ".")
|
||||
IEx.Helpers.c("uuid.ex", ".")
|
||||
IEx.Helpers.c("test_util.ex", ".")
|
||||
|
||||
host = String.trim(to_string(:os.cmd(~c"hostname -s")))
|
||||
|
||||
# ###########
|
||||
|
||||
test_suite = [
|
||||
# test case, configuration, number of times to run the case, description
|
||||
# Use TestUtil.get_dist_config(host, n) to generate a multi-node configuration
|
||||
# consisting of n processes, each one on a different node.
|
||||
# Use TestUtil.get_local_config(n) to generate a single-node configuration
|
||||
# consisting of n processes, all running on the same node.
|
||||
|
||||
# {&PaxosTest.run_simple/3, TestUtil.get_local_config(3), 10,
|
||||
# "No failures, no concurrent ballots, 3 local procs"},
|
||||
# {&PaxosTest.run_simple/3, TestUtil.get_dist_config(host, 3), 10,
|
||||
# "No failures, no concurrent ballots, 3 nodes"},
|
||||
# {&PaxosTest.run_simple/3, TestUtil.get_local_config(5), 10,
|
||||
# "No failures, no concurrent ballots, 5 local procs"},
|
||||
# {&PaxosTest.run_simple_2/3, TestUtil.get_dist_config(host, 3), 10,
|
||||
# "No failures, 2 concurrent ballots, 3 nodes"},
|
||||
# {&PaxosTest.run_simple_2/3, TestUtil.get_local_config(3), 10,
|
||||
# "No failures, 2 concurrent ballots, 3 local procs"},
|
||||
# {&PaxosTest.run_simple_3/3, TestUtil.get_local_config(3), 10,
|
||||
# "No failures, 2 concurrent instances, 3 local procs"},
|
||||
# {&PaxosTest.run_simple_many_1/3, TestUtil.get_dist_config(host, 5), 10,
|
||||
# "No failures, many concurrent ballots 1, 5 nodes"},
|
||||
# {&PaxosTest.run_simple_many_1/3, TestUtil.get_local_config(5), 10,
|
||||
# "No failures, many concurrent ballots 1, 5 local procs"},
|
||||
# {&PaxosTest.run_simple_many_2/3, TestUtil.get_dist_config(host, 5), 10,
|
||||
# "No failures, many concurrent ballots 2, 5 nodes"},
|
||||
# {&PaxosTest.run_simple_many_2/3, TestUtil.get_local_config(5), 10,
|
||||
# "No failures, many concurrent ballots 2, 5 local procs"},
|
||||
# {&PaxosTest.run_non_leader_crash/3, TestUtil.get_dist_config(host, 3), 10,
|
||||
# "One non-leader crashes, no concurrent ballots, 3 nodes"},
|
||||
# {&PaxosTest.run_non_leader_crash/3, TestUtil.get_local_config(3), 10,
|
||||
# "One non-leader crashes, no concurrent ballots, 3 local procs"},
|
||||
# {&PaxosTest.run_minority_non_leader_crash/3, TestUtil.get_dist_config(host, 5), 10,
|
||||
# "Minority non-leader crashes, no concurrent ballots"},
|
||||
# {&PaxosTest.run_minority_non_leader_crash/3, TestUtil.get_local_config(5), 10,
|
||||
# "Minority non-leader crashes, no concurrent ballots"},
|
||||
{&PaxosTest.run_leader_crash_simple/3, TestUtil.get_dist_config(host, 5), 10,
|
||||
"Leader crashes, no concurrent ballots, 5 nodes"},
|
||||
{&PaxosTest.run_leader_crash_simple/3, TestUtil.get_local_config(5), 10,
|
||||
"Leader crashes, no concurrent ballots, 5 local procs"},
|
||||
{&PaxosTest.run_leader_crash_simple_2/3, TestUtil.get_dist_config(host, 7), 10,
|
||||
"Leader and some non-leaders crash, no concurrent ballots, 7 nodes"},
|
||||
{&PaxosTest.run_leader_crash_simple_2/3, TestUtil.get_local_config(7), 10,
|
||||
"Leader and some non-leaders crash, no concurrent ballots, 7 local procs"},
|
||||
{&PaxosTest.run_leader_crash_complex/3, TestUtil.get_dist_config(host, 11), 10,
|
||||
"Cascading failures of leaders and non-leaders, 11 nodes"},
|
||||
{&PaxosTest.run_leader_crash_complex/3, TestUtil.get_local_config(11), 10,
|
||||
"Cascading failures of leaders and non-leaders, 11 local procs"},
|
||||
{&PaxosTest.run_leader_crash_complex_2/3, TestUtil.get_dist_config(host, 11), 10,
|
||||
"Cascading failures of leaders and non-leaders, random delays, 7 nodes"},
|
||||
{&PaxosTest.run_leader_crash_complex_2/3, TestUtil.get_local_config(11), 10,
|
||||
"Cascading failures of leaders and non-leaders, random delays, 7 local procs"}
|
||||
]
|
||||
|
||||
Node.stop()
|
||||
# Confusingly, Node.start fails if epmd is not running.
|
||||
# epmd can be started manually with "epmd -daemon" or
|
||||
# will start automatically whenever any Erlang VM is
|
||||
# started with --sname or --name option.
|
||||
Node.start(TestUtil.get_node(host), :shortnames)
|
||||
|
||||
Enum.reduce(test_suite, length(test_suite), fn {func, config, n, doc}, acc ->
|
||||
IO.puts(:stderr, "============")
|
||||
IO.puts(:stderr, "#{inspect(doc)}, #{inspect(n)} time#{if n > 1, do: "s", else: ""}")
|
||||
IO.puts(:stderr, "============")
|
||||
|
||||
for _ <- 1..n do
|
||||
res = TestHarness.test(func, Enum.shuffle(Map.to_list(config)))
|
||||
# IO.puts("#{inspect res}")
|
||||
{vl, al, ll} =
|
||||
Enum.reduce(res, {[], [], []}, fn
|
||||
{_, _, s, v, a, {:message_queue_len, l}}, {vl, al, ll} ->
|
||||
# if s not in [:killed, :none], do: {[v | vl], [a | al], [l | ll]},
|
||||
if s not in [:killed],
|
||||
do: {[v | vl], [a | al], [l | ll]},
|
||||
else: {vl, al, ll}
|
||||
|
||||
{_, _, _, _, _, nil}, {vl, al, ll} ->
|
||||
{vl, al, ll}
|
||||
end)
|
||||
|
||||
IO.puts("#{inspect(vl)}")
|
||||
termination = vl != [] and :none not in vl
|
||||
agreement = termination and MapSet.size(MapSet.new(vl)) == 1
|
||||
{:val, agreement_val} = if agreement, do: hd(vl), else: {:val, -1}
|
||||
validity = agreement_val in 201..210
|
||||
safety = agreement and validity
|
||||
TestUtil.pause_stderr(100)
|
||||
|
||||
if termination and safety do
|
||||
too_many_attempts = (get_att = fn a -> 10 - a + 1 end).(Enum.max(al)) > 5
|
||||
too_many_messages_left = Enum.max(ll) > 10
|
||||
warn = if too_many_attempts, do: [{:too_many_attempts, get_att.(Enum.max(al))}], else: []
|
||||
|
||||
warn =
|
||||
if too_many_messages_left,
|
||||
do: [{:too_many_messages_left, Enum.max(ll)} | warn],
|
||||
else: warn
|
||||
|
||||
IO.puts(:stderr, if(warn == [], do: "PASS", else: "PASS (#{inspect(warn)})"))
|
||||
# IO.puts(:stderr, "#{inspect res}")
|
||||
else
|
||||
IO.puts(:stderr, "FAIL\n\t#{inspect(res)}")
|
||||
end
|
||||
end
|
||||
|
||||
IO.puts(:stderr, "============#{if acc > 1, do: "\n", else: ""}")
|
||||
acc - 1
|
||||
end)
|
||||
|
||||
:os.cmd(~c"/bin/rm -f *.beam")
|
||||
Node.stop()
|
||||
System.halt()
|
||||
26
lib/test_util.ex
Executable file
26
lib/test_util.ex
Executable file
@ -0,0 +1,26 @@
|
||||
defmodule TestUtil do
|
||||
|
||||
def get_node(host), do: String.to_atom(UUID.uuid1 <> "@" <> host)
|
||||
|
||||
def get_dist_config(host, n) do
|
||||
for i <- (1..n), into: %{}, do:
|
||||
{String.to_atom("p"<>to_string(i)), {get_node(host), {:val, Enum.random(201..210)}}}
|
||||
end
|
||||
|
||||
def get_local_config(n) do
|
||||
for i <- 1..n, into: %{}, do:
|
||||
{String.to_atom("p"<>to_string(i)), {:local, {:val, Enum.random(201..210)}}}
|
||||
end
|
||||
|
||||
def pause_stderr(d) do
|
||||
my_pid = self()
|
||||
spawn(fn -> pid=Process.whereis(:standard_error);
|
||||
:erlang.suspend_process(pid);
|
||||
send(my_pid, {:suspended})
|
||||
Process.sleep(d);
|
||||
:erlang.resume_process(pid) end)
|
||||
receive do
|
||||
{:suspended} -> :done
|
||||
end
|
||||
end
|
||||
end
|
||||
@ -8,12 +8,15 @@ defmodule Utils do
|
||||
|
||||
def beb_broadcast(m, dest), do: for(p <- dest, do: unicast(m, p))
|
||||
|
||||
def register_name(name, pid) do
|
||||
def register_name(name, pid, link \\ true) do
|
||||
case :global.re_register_name(name, pid) do
|
||||
:yes ->
|
||||
# Note this is running on the parent so we are linking the parent to the rb
|
||||
# so that when we close the parent the rb also dies
|
||||
if link do
|
||||
Process.link(pid)
|
||||
end
|
||||
|
||||
pid
|
||||
|
||||
:no ->
|
||||
|
||||
662
lib/uuid.ex
Executable file
662
lib/uuid.ex
Executable file
@ -0,0 +1,662 @@
|
||||
defmodule UUID do
|
||||
use Bitwise, only_operators: true
|
||||
@moduledoc """
|
||||
UUID generator and utilities for [Elixir](http://elixir-lang.org/).
|
||||
See [RFC 4122](http://www.ietf.org/rfc/rfc4122.txt).
|
||||
"""
|
||||
|
||||
@nanosec_intervals_offset 122_192_928_000_000_000 # 15 Oct 1582 to 1 Jan 1970.
|
||||
@nanosec_intervals_factor 10 # Microseconds to nanoseconds factor.
|
||||
|
||||
@variant10 2 # Variant, corresponds to variant 1 0 of RFC 4122.
|
||||
@uuid_v1 1 # UUID v1 identifier.
|
||||
@uuid_v3 3 # UUID v3 identifier.
|
||||
@uuid_v4 4 # UUID v4 identifier.
|
||||
@uuid_v5 5 # UUID v5 identifier.
|
||||
|
||||
@urn "urn:uuid:" # UUID URN prefix.
|
||||
|
||||
@doc """
|
||||
Inspect a UUID and return tuple with `{:ok, result}`, where result is
|
||||
information about its 128-bit binary content, type,
|
||||
version and variant.
|
||||
|
||||
Timestamp portion is not checked to see if it's in the future, and therefore
|
||||
not yet assignable. See "Validation mechanism" in section 3 of
|
||||
[RFC 4122](http://www.ietf.org/rfc/rfc4122.txt).
|
||||
|
||||
Will return `{:error, message}` if the given string is not a UUID representation
|
||||
in a format like:
|
||||
* `"870df8e8-3107-4487-8316-81e089b8c2cf"`
|
||||
* `"8ea1513df8a14dea9bea6b8f4b5b6e73"`
|
||||
* `"urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304"`
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.info("870df8e8-3107-4487-8316-81e089b8c2cf")
|
||||
{:ok, [uuid: "870df8e8-3107-4487-8316-81e089b8c2cf",
|
||||
binary: <<135, 13, 248, 232, 49, 7, 68, 135, 131, 22, 129, 224, 137, 184, 194, 207>>,
|
||||
type: :default,
|
||||
version: 4,
|
||||
variant: :rfc4122]}
|
||||
|
||||
iex> UUID.info("8ea1513df8a14dea9bea6b8f4b5b6e73")
|
||||
{:ok, [uuid: "8ea1513df8a14dea9bea6b8f4b5b6e73",
|
||||
binary: <<142, 161, 81, 61, 248, 161, 77, 234, 155,
|
||||
234, 107, 143, 75, 91, 110, 115>>,
|
||||
type: :hex,
|
||||
version: 4,
|
||||
variant: :rfc4122]}
|
||||
|
||||
iex> UUID.info("urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304")
|
||||
{:ok, [uuid: "urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304",
|
||||
binary: <<239, 27, 26, 40, 238, 52, 17, 227, 136, 19, 20, 16, 159, 241, 163, 4>>,
|
||||
type: :urn,
|
||||
version: 1,
|
||||
variant: :rfc4122]}
|
||||
|
||||
iex> UUID.info(<<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>)
|
||||
{:ok, [uuid: <<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>,
|
||||
binary: <<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>,
|
||||
type: :raw,
|
||||
version: 4,
|
||||
variant: :rfc4122]}
|
||||
|
||||
iex> UUID.info("12345")
|
||||
{:error, "Invalid argument; Not a valid UUID: 12345"}
|
||||
|
||||
```
|
||||
|
||||
"""
|
||||
def info(uuid) do
|
||||
try do
|
||||
{:ok, UUID.info!(uuid)}
|
||||
rescue
|
||||
e in ArgumentError -> {:error, e.message}
|
||||
end
|
||||
end
|
||||
|
||||
@doc """
|
||||
Inspect a UUID and return information about its 128-bit binary content, type,
|
||||
version and variant.
|
||||
|
||||
Timestamp portion is not checked to see if it's in the future, and therefore
|
||||
not yet assignable. See "Validation mechanism" in section 3 of
|
||||
[RFC 4122](http://www.ietf.org/rfc/rfc4122.txt).
|
||||
|
||||
Will raise an `ArgumentError` if the given string is not a UUID representation
|
||||
in a format like:
|
||||
* `"870df8e8-3107-4487-8316-81e089b8c2cf"`
|
||||
* `"8ea1513df8a14dea9bea6b8f4b5b6e73"`
|
||||
* `"urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304"`
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.info!("870df8e8-3107-4487-8316-81e089b8c2cf")
|
||||
[uuid: "870df8e8-3107-4487-8316-81e089b8c2cf",
|
||||
binary: <<135, 13, 248, 232, 49, 7, 68, 135, 131, 22, 129, 224, 137, 184, 194, 207>>,
|
||||
type: :default,
|
||||
version: 4,
|
||||
variant: :rfc4122]
|
||||
|
||||
iex> UUID.info!("8ea1513df8a14dea9bea6b8f4b5b6e73")
|
||||
[uuid: "8ea1513df8a14dea9bea6b8f4b5b6e73",
|
||||
binary: <<142, 161, 81, 61, 248, 161, 77, 234, 155,
|
||||
234, 107, 143, 75, 91, 110, 115>>,
|
||||
type: :hex,
|
||||
version: 4,
|
||||
variant: :rfc4122]
|
||||
|
||||
iex> UUID.info!("urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304")
|
||||
[uuid: "urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304",
|
||||
binary: <<239, 27, 26, 40, 238, 52, 17, 227, 136, 19, 20, 16, 159, 241, 163, 4>>,
|
||||
type: :urn,
|
||||
version: 1,
|
||||
variant: :rfc4122]
|
||||
|
||||
iex> UUID.info!(<<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>)
|
||||
[uuid: <<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>,
|
||||
binary: <<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>,
|
||||
type: :raw,
|
||||
version: 4,
|
||||
variant: :rfc4122]
|
||||
|
||||
```
|
||||
|
||||
"""
|
||||
def info!(<<uuid::binary>> = uuid_string) do
|
||||
{type, <<uuid::128>>} = uuid_string_to_hex_pair(uuid)
|
||||
<<_::48, version::4, _::12, v0::1, v1::1, v2::1, _::61>> = <<uuid::128>>
|
||||
[uuid: uuid_string,
|
||||
binary: <<uuid::128>>,
|
||||
type: type,
|
||||
version: version,
|
||||
variant: variant(<<v0, v1, v2>>)]
|
||||
end
|
||||
def info!(_) do
|
||||
raise ArgumentError, message: "Invalid argument; Expected: String"
|
||||
end
|
||||
|
||||
@doc """
|
||||
Convert binary UUID data to a string.
|
||||
|
||||
Will raise an ArgumentError if the given binary is not valid UUID data, or
|
||||
the format argument is not one of: `:default`, `:hex`, `:urn`, or `:raw`.
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.binary_to_string!(<<135, 13, 248, 232, 49, 7, 68, 135,
|
||||
...> 131, 22, 129, 224, 137, 184, 194, 207>>)
|
||||
"870df8e8-3107-4487-8316-81e089b8c2cf"
|
||||
|
||||
iex> UUID.binary_to_string!(<<142, 161, 81, 61, 248, 161, 77, 234, 155,
|
||||
...> 234, 107, 143, 75, 91, 110, 115>>, :hex)
|
||||
"8ea1513df8a14dea9bea6b8f4b5b6e73"
|
||||
|
||||
iex> UUID.binary_to_string!(<<239, 27, 26, 40, 238, 52, 17, 227, 136,
|
||||
...> 19, 20, 16, 159, 241, 163, 4>>, :urn)
|
||||
"urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304"
|
||||
|
||||
iex> UUID.binary_to_string!(<<39, 73, 196, 181, 29, 90, 74, 96, 157,
|
||||
...> 47, 171, 144, 84, 164, 155, 52>>, :raw)
|
||||
<<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>
|
||||
|
||||
```
|
||||
|
||||
"""
|
||||
def binary_to_string!(uuid, format \\ :default)
|
||||
def binary_to_string!(<<uuid::binary>>, format) do
|
||||
uuid_to_string(<<uuid::binary>>, format)
|
||||
end
|
||||
def binary_to_string!(_, _) do
|
||||
raise ArgumentError, message: "Invalid argument; Expected: <<uuid::128>>"
|
||||
end
|
||||
|
||||
@doc """
|
||||
Convert a UUID string to its binary data equivalent.
|
||||
|
||||
Will raise an ArgumentError if the given string is not a UUID representation
|
||||
in a format like:
|
||||
* `"870df8e8-3107-4487-8316-81e089b8c2cf"`
|
||||
* `"8ea1513df8a14dea9bea6b8f4b5b6e73"`
|
||||
* `"urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304"`
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.string_to_binary!("870df8e8-3107-4487-8316-81e089b8c2cf")
|
||||
<<135, 13, 248, 232, 49, 7, 68, 135, 131, 22, 129, 224, 137, 184, 194, 207>>
|
||||
|
||||
iex> UUID.string_to_binary!("8ea1513df8a14dea9bea6b8f4b5b6e73")
|
||||
<<142, 161, 81, 61, 248, 161, 77, 234, 155, 234, 107, 143, 75, 91, 110, 115>>
|
||||
|
||||
iex> UUID.string_to_binary!("urn:uuid:ef1b1a28-ee34-11e3-8813-14109ff1a304")
|
||||
<<239, 27, 26, 40, 238, 52, 17, 227, 136, 19, 20, 16, 159, 241, 163, 4>>
|
||||
|
||||
iex> UUID.string_to_binary!(<<39, 73, 196, 181, 29, 90, 74, 96, 157, 47,
|
||||
...> 171, 144, 84, 164, 155, 52>>)
|
||||
<<39, 73, 196, 181, 29, 90, 74, 96, 157, 47, 171, 144, 84, 164, 155, 52>>
|
||||
|
||||
```
|
||||
|
||||
"""
|
||||
def string_to_binary!(<<uuid::binary>>) do
|
||||
{_type, <<uuid::128>>} = uuid_string_to_hex_pair(uuid)
|
||||
<<uuid::128>>
|
||||
end
|
||||
def string_to_binary!(_) do
|
||||
raise ArgumentError, message: "Invalid argument; Expected: String"
|
||||
end
|
||||
|
||||
@doc """
|
||||
Generate a new UUID v1. This version uses a combination of one or more of:
|
||||
unix epoch, random bytes, pid hash, and hardware address.
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.uuid1()
|
||||
"cdfdaf44-ee35-11e3-846b-14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:default)
|
||||
"cdfdaf44-ee35-11e3-846b-14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:hex)
|
||||
"cdfdaf44ee3511e3846b14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:urn)
|
||||
"urn:uuid:cdfdaf44-ee35-11e3-846b-14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:raw)
|
||||
<<205, 253, 175, 68, 238, 53, 17, 227, 132, 107, 20, 16, 159, 241, 163, 4>>
|
||||
|
||||
iex> UUID.uuid1(:slug)
|
||||
"zf2vRO41EeOEaxQQn_GjBA"
|
||||
```
|
||||
|
||||
"""
|
||||
def uuid1(format \\ :default) do
|
||||
uuid1(uuid1_clockseq(), uuid1_node(), format)
|
||||
end
|
||||
|
||||
@doc """
|
||||
Generate a new UUID v1, with an existing clock sequence and node address. This
|
||||
version uses a combination of one or more of: unix epoch, random bytes,
|
||||
pid hash, and hardware address.
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.uuid1()
|
||||
"cdfdaf44-ee35-11e3-846b-14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:default)
|
||||
"cdfdaf44-ee35-11e3-846b-14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:hex)
|
||||
"cdfdaf44ee3511e3846b14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:urn)
|
||||
"urn:uuid:cdfdaf44-ee35-11e3-846b-14109ff1a304"
|
||||
|
||||
iex> UUID.uuid1(:raw)
|
||||
<<205, 253, 175, 68, 238, 53, 17, 227, 132, 107, 20, 16, 159, 241, 163, 4>>
|
||||
|
||||
iex> UUID.uuid1(:slug)
|
||||
"zf2vRO41EeOEaxQQn_GjBA"
|
||||
```
|
||||
|
||||
"""
|
||||
def uuid1(clock_seq, node, format \\ :default)
|
||||
def uuid1(<<clock_seq::14>>, <<node::48>>, format) do
|
||||
<<time_hi::12, time_mid::16, time_low::32>> = uuid1_time()
|
||||
<<clock_seq_hi::6, clock_seq_low::8>> = <<clock_seq::14>>
|
||||
<<time_low::32, time_mid::16, @uuid_v1::4, time_hi::12, @variant10::2,
|
||||
clock_seq_hi::6, clock_seq_low::8, node::48>>
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid1(_, _, _) do
|
||||
raise ArgumentError, message:
|
||||
"Invalid argument; Expected: <<clock_seq::14>>, <<node::48>>"
|
||||
end
|
||||
|
||||
@doc """
|
||||
Generate a new UUID v3. This version uses an MD5 hash of fixed value (chosen
|
||||
based on a namespace atom - see Appendix C of
|
||||
[RFC 4122](http://www.ietf.org/rfc/rfc4122.txt) and a name value. Can also be
|
||||
given an existing UUID String instead of a namespace atom.
|
||||
|
||||
Accepted arguments are: `:dns`|`:url`|`:oid`|`:x500`|`:nil` OR uuid, String
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.uuid3(:dns, "my.domain.com")
|
||||
"03bf0706-b7e9-33b8-aee5-c6142a816478"
|
||||
|
||||
iex> UUID.uuid3(:dns, "my.domain.com", :default)
|
||||
"03bf0706-b7e9-33b8-aee5-c6142a816478"
|
||||
|
||||
iex> UUID.uuid3(:dns, "my.domain.com", :hex)
|
||||
"03bf0706b7e933b8aee5c6142a816478"
|
||||
|
||||
iex> UUID.uuid3(:dns, "my.domain.com", :urn)
|
||||
"urn:uuid:03bf0706-b7e9-33b8-aee5-c6142a816478"
|
||||
|
||||
iex> UUID.uuid3(:dns, "my.domain.com", :raw)
|
||||
<<3, 191, 7, 6, 183, 233, 51, 184, 174, 229, 198, 20, 42, 129, 100, 120>>
|
||||
|
||||
iex> UUID.uuid3("cdfdaf44-ee35-11e3-846b-14109ff1a304", "my.domain.com")
|
||||
"8808f33a-3e11-3708-919e-15fba88908db"
|
||||
|
||||
iex> UUID.uuid3(:dns, "my.domain.com", :slug)
|
||||
"A78HBrfpM7iu5cYUKoFkeA"
|
||||
```
|
||||
|
||||
"""
|
||||
def uuid3(namespace_or_uuid, name, format \\ :default)
|
||||
def uuid3(:dns, <<name::binary>>, format) do
|
||||
namebased_uuid(:md5, <<0x6ba7b8109dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid3(:url, <<name::binary>>, format) do
|
||||
namebased_uuid(:md5, <<0x6ba7b8119dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid3(:oid, <<name::binary>>, format) do
|
||||
namebased_uuid(:md5, <<0x6ba7b8129dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid3(:x500, <<name::binary>>, format) do
|
||||
namebased_uuid(:md5, <<0x6ba7b8149dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid3(:nil, <<name::binary>>, format) do
|
||||
namebased_uuid(:md5, <<0::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid3(<<uuid::binary>>, <<name::binary>>, format) do
|
||||
{_type, <<uuid::128>>} = uuid_string_to_hex_pair(uuid)
|
||||
namebased_uuid(:md5, <<uuid::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid3(_, _, _) do
|
||||
raise ArgumentError, message:
|
||||
"Invalid argument; Expected: :dns|:url|:oid|:x500|:nil OR String, String"
|
||||
end
|
||||
|
||||
@doc """
|
||||
Generate a new UUID v4. This version uses pseudo-random bytes generated by
|
||||
the `crypto` module.
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.uuid4()
|
||||
"fb49a0ec-d60c-4d20-9264-3b4cfe272106"
|
||||
|
||||
iex> UUID.uuid4(:default)
|
||||
"fb49a0ec-d60c-4d20-9264-3b4cfe272106"
|
||||
|
||||
iex> UUID.uuid4(:hex)
|
||||
"fb49a0ecd60c4d2092643b4cfe272106"
|
||||
|
||||
iex> UUID.uuid4(:urn)
|
||||
"urn:uuid:fb49a0ec-d60c-4d20-9264-3b4cfe272106"
|
||||
|
||||
iex> UUID.uuid4(:raw)
|
||||
<<251, 73, 160, 236, 214, 12, 77, 32, 146, 100, 59, 76, 254, 39, 33, 6>>
|
||||
|
||||
iex> UUID.uuid4(:slug)
|
||||
"-0mg7NYMTSCSZDtM_ichBg"
|
||||
```
|
||||
|
||||
"""
|
||||
def uuid4(), do: uuid4(:default)
|
||||
|
||||
def uuid4(:strong), do: uuid4(:default) # For backwards compatibility.
|
||||
def uuid4(:weak), do: uuid4(:default) # For backwards compatibility.
|
||||
def uuid4(format) do
|
||||
<<u0::48, _::4, u1::12, _::2, u2::62>> = :crypto.strong_rand_bytes(16)
|
||||
<<u0::48, @uuid_v4::4, u1::12, @variant10::2, u2::62>>
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
|
||||
@doc """
|
||||
Generate a new UUID v5. This version uses an SHA1 hash of fixed value (chosen
|
||||
based on a namespace atom - see Appendix C of
|
||||
[RFC 4122](http://www.ietf.org/rfc/rfc4122.txt) and a name value. Can also be
|
||||
given an existing UUID String instead of a namespace atom.
|
||||
|
||||
Accepted arguments are: `:dns`|`:url`|`:oid`|`:x500`|`:nil` OR uuid, String
|
||||
|
||||
## Examples
|
||||
|
||||
```elixir
|
||||
iex> UUID.uuid5(:dns, "my.domain.com")
|
||||
"016c25fd-70e0-56fe-9d1a-56e80fa20b82"
|
||||
|
||||
iex> UUID.uuid5(:dns, "my.domain.com", :default)
|
||||
"016c25fd-70e0-56fe-9d1a-56e80fa20b82"
|
||||
|
||||
iex> UUID.uuid5(:dns, "my.domain.com", :hex)
|
||||
"016c25fd70e056fe9d1a56e80fa20b82"
|
||||
|
||||
iex> UUID.uuid5(:dns, "my.domain.com", :urn)
|
||||
"urn:uuid:016c25fd-70e0-56fe-9d1a-56e80fa20b82"
|
||||
|
||||
iex> UUID.uuid5(:dns, "my.domain.com", :raw)
|
||||
<<1, 108, 37, 253, 112, 224, 86, 254, 157, 26, 86, 232, 15, 162, 11, 130>>
|
||||
|
||||
iex> UUID.uuid5("fb49a0ec-d60c-4d20-9264-3b4cfe272106", "my.domain.com")
|
||||
"822cab19-df58-5eb4-98b5-c96c15c76d32"
|
||||
|
||||
iex> UUID.uuid5("fb49a0ec-d60c-4d20-9264-3b4cfe272106", "my.domain.com", :slug)
|
||||
"giyrGd9YXrSYtclsFcdtMg"
|
||||
```
|
||||
|
||||
"""
|
||||
def uuid5(namespace_or_uuid, name, format \\ :default)
|
||||
def uuid5(:dns, <<name::binary>>, format) do
|
||||
namebased_uuid(:sha1, <<0x6ba7b8109dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid5(:url, <<name::binary>>, format) do
|
||||
namebased_uuid(:sha1, <<0x6ba7b8119dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid5(:oid, <<name::binary>>, format) do
|
||||
namebased_uuid(:sha1, <<0x6ba7b8129dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid5(:x500, <<name::binary>>, format) do
|
||||
namebased_uuid(:sha1, <<0x6ba7b8149dad11d180b400c04fd430c8::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid5(:nil, <<name::binary>>, format) do
|
||||
namebased_uuid(:sha1, <<0::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid5(<<uuid::binary>>, <<name::binary>>, format) do
|
||||
{_type, <<uuid::128>>} = uuid_string_to_hex_pair(uuid)
|
||||
namebased_uuid(:sha1, <<uuid::128, name::binary>>)
|
||||
|> uuid_to_string(format)
|
||||
end
|
||||
def uuid5(_, _, _) do
|
||||
raise ArgumentError, message:
|
||||
"Invalid argument; Expected: :dns|:url|:oid|:x500|:nil OR String, String"
|
||||
end
|
||||
|
||||
#
|
||||
# Internal utility functions.
|
||||
#
|
||||
|
||||
# Convert UUID bytes to String.
|
||||
defp uuid_to_string(<<_::128>> = u, :default) do
|
||||
uuid_to_string_default(u)
|
||||
end
|
||||
defp uuid_to_string(<<_::128>> = u, :hex) do
|
||||
IO.iodata_to_binary(for <<part::4 <- u>>, do: e(part))
|
||||
end
|
||||
defp uuid_to_string(<<_::128>> = u, :urn) do
|
||||
@urn <> uuid_to_string(u, :default)
|
||||
end
|
||||
defp uuid_to_string(<<_::128>> = u, :raw) do
|
||||
u
|
||||
end
|
||||
defp uuid_to_string(<<_::128>> = u, :slug) do
|
||||
Base.url_encode64(u, [padding: false])
|
||||
end
|
||||
defp uuid_to_string(_u, format) when format in [:default, :hex, :urn, :slug] do
|
||||
raise ArgumentError, message:
|
||||
"Invalid binary data; Expected: <<uuid::128>>"
|
||||
end
|
||||
defp uuid_to_string(_u, format) do
|
||||
raise ArgumentError, message:
|
||||
"Invalid format #{format}; Expected: :default|:hex|:urn|:slug"
|
||||
end
|
||||
|
||||
defp uuid_to_string_default(<<
|
||||
a1::4, a2::4, a3::4, a4::4,
|
||||
a5::4, a6::4, a7::4, a8::4,
|
||||
b1::4, b2::4, b3::4, b4::4,
|
||||
c1::4, c2::4, c3::4, c4::4,
|
||||
d1::4, d2::4, d3::4, d4::4,
|
||||
e1::4, e2::4, e3::4, e4::4,
|
||||
e5::4, e6::4, e7::4, e8::4,
|
||||
e9::4, e10::4, e11::4, e12::4 >>) do
|
||||
<< e(a1), e(a2), e(a3), e(a4), e(a5), e(a6), e(a7), e(a8), ?-,
|
||||
e(b1), e(b2), e(b3), e(b4), ?-,
|
||||
e(c1), e(c2), e(c3), e(c4), ?-,
|
||||
e(d1), e(d2), e(d3), e(d4), ?-,
|
||||
e(e1), e(e2), e(e3), e(e4), e(e5), e(e6), e(e7), e(e8), e(e9), e(e10), e(e11), e(e12) >>
|
||||
end
|
||||
|
||||
@compile {:inline, e: 1}
|
||||
|
||||
defp e(0), do: ?0
|
||||
defp e(1), do: ?1
|
||||
defp e(2), do: ?2
|
||||
defp e(3), do: ?3
|
||||
defp e(4), do: ?4
|
||||
defp e(5), do: ?5
|
||||
defp e(6), do: ?6
|
||||
defp e(7), do: ?7
|
||||
defp e(8), do: ?8
|
||||
defp e(9), do: ?9
|
||||
defp e(10), do: ?a
|
||||
defp e(11), do: ?b
|
||||
defp e(12), do: ?c
|
||||
defp e(13), do: ?d
|
||||
defp e(14), do: ?e
|
||||
defp e(15), do: ?f
|
||||
|
||||
# Extract the type (:default etc) and pure byte value from a UUID String.
|
||||
defp uuid_string_to_hex_pair(<<_::128>> = uuid) do
|
||||
{:raw, uuid}
|
||||
end
|
||||
defp uuid_string_to_hex_pair(<<uuid_in::binary>>) do
|
||||
uuid = String.downcase(uuid_in)
|
||||
{type, hex_str} = case uuid do
|
||||
<<u0::64, ?-, u1::32, ?-, u2::32, ?-, u3::32, ?-, u4::96>> ->
|
||||
{:default, <<u0::64, u1::32, u2::32, u3::32, u4::96>>}
|
||||
<<u::256>> ->
|
||||
{:hex, <<u::256>>}
|
||||
<<@urn, u0::64, ?-, u1::32, ?-, u2::32, ?-, u3::32, ?-, u4::96>> ->
|
||||
{:urn, <<u0::64, u1::32, u2::32, u3::32, u4::96>>}
|
||||
_ ->
|
||||
case uuid_in do
|
||||
_ when byte_size(uuid_in) == 22 ->
|
||||
case Base.url_decode64(uuid_in <> "==") do
|
||||
{:ok, decoded} -> {:slug, Base.encode16(decoded)}
|
||||
_ -> raise ArgumentError, message: "Invalid argument; Not a valid UUID: #{uuid}"
|
||||
end
|
||||
_ -> raise ArgumentError, message: "Invalid argument; Not a valid UUID: #{uuid}"
|
||||
end
|
||||
end
|
||||
|
||||
try do
|
||||
{type, hex_str_to_binary(hex_str)}
|
||||
catch
|
||||
_, _ ->
|
||||
raise ArgumentError, message:
|
||||
"Invalid argument; Not a valid UUID: #{uuid}"
|
||||
end
|
||||
end
|
||||
|
||||
# Get unix epoch as a 60-bit timestamp.
|
||||
defp uuid1_time() do
|
||||
{mega_sec, sec, micro_sec} = :os.timestamp()
|
||||
epoch = (mega_sec * 1_000_000_000_000 + sec * 1_000_000 + micro_sec)
|
||||
timestamp = @nanosec_intervals_offset + @nanosec_intervals_factor * epoch
|
||||
<<timestamp::60>>
|
||||
end
|
||||
|
||||
# Generate random clock sequence.
|
||||
defp uuid1_clockseq() do
|
||||
<<rnd::14, _::2>> = :crypto.strong_rand_bytes(2)
|
||||
<<rnd::14>>
|
||||
end
|
||||
|
||||
# Get local IEEE 802 (MAC) address, or a random node id if it can't be found.
|
||||
defp uuid1_node() do
|
||||
{:ok, ifs0} = :inet.getifaddrs()
|
||||
uuid1_node(ifs0)
|
||||
end
|
||||
|
||||
defp uuid1_node([{_if_name, if_config} | rest]) do
|
||||
case :lists.keyfind(:hwaddr, 1, if_config) do
|
||||
:false ->
|
||||
uuid1_node(rest)
|
||||
{:hwaddr, hw_addr} ->
|
||||
if length(hw_addr) != 6 or Enum.all?(hw_addr, fn(n) -> n == 0 end) do
|
||||
uuid1_node(rest)
|
||||
else
|
||||
:erlang.list_to_binary(hw_addr)
|
||||
end
|
||||
end
|
||||
end
|
||||
defp uuid1_node(_) do
|
||||
<<rnd_hi::7, _::1, rnd_low::40>> = :crypto.strong_rand_bytes(6)
|
||||
<<rnd_hi::7, 1::1, rnd_low::40>>
|
||||
end
|
||||
|
||||
# Generate a hash of the given data.
|
||||
defp namebased_uuid(:md5, data) do
|
||||
md5 = :crypto.hash(:md5, data)
|
||||
compose_namebased_uuid(@uuid_v3, md5)
|
||||
end
|
||||
defp namebased_uuid(:sha1, data) do
|
||||
<<sha1::128, _::32>> = :crypto.hash(:sha, data)
|
||||
compose_namebased_uuid(@uuid_v5, <<sha1::128>>)
|
||||
end
|
||||
|
||||
# Format the given hash as a UUID.
|
||||
defp compose_namebased_uuid(version, hash) do
|
||||
<<time_low::32, time_mid::16, _::4, time_hi::12, _::2,
|
||||
clock_seq_hi::6, clock_seq_low::8, node::48>> = hash
|
||||
<<time_low::32, time_mid::16, version::4, time_hi::12, @variant10::2,
|
||||
clock_seq_hi::6, clock_seq_low::8, node::48>>
|
||||
end
|
||||
|
||||
# Identify the UUID variant according to section 4.1.1 of RFC 4122.
|
||||
defp variant(<<1, 1, 1>>) do
|
||||
:reserved_future
|
||||
end
|
||||
defp variant(<<1, 1, _v>>) do
|
||||
:reserved_microsoft
|
||||
end
|
||||
defp variant(<<1, 0, _v>>) do
|
||||
:rfc4122
|
||||
end
|
||||
defp variant(<<0, _v::2-binary>>) do
|
||||
:reserved_ncs
|
||||
end
|
||||
defp variant(_) do
|
||||
raise ArgumentError, message: "Invalid argument; Not valid variant bits"
|
||||
end
|
||||
|
||||
defp hex_str_to_binary(<< a1, a2, a3, a4, a5, a6, a7, a8,
|
||||
b1, b2, b3, b4,
|
||||
c1, c2, c3, c4,
|
||||
d1, d2, d3, d4,
|
||||
e1, e2, e3, e4, e5, e6, e7, e8, e9, e10, e11, e12 >>) do
|
||||
<< d(a1)::4, d(a2)::4, d(a3)::4, d(a4)::4,
|
||||
d(a5)::4, d(a6)::4, d(a7)::4, d(a8)::4,
|
||||
d(b1)::4, d(b2)::4, d(b3)::4, d(b4)::4,
|
||||
d(c1)::4, d(c2)::4, d(c3)::4, d(c4)::4,
|
||||
d(d1)::4, d(d2)::4, d(d3)::4, d(d4)::4,
|
||||
d(e1)::4, d(e2)::4, d(e3)::4, d(e4)::4,
|
||||
d(e5)::4, d(e6)::4, d(e7)::4, d(e8)::4,
|
||||
d(e9)::4, d(e10)::4, d(e11)::4, d(e12)::4 >>
|
||||
end
|
||||
|
||||
@compile {:inline, d: 1}
|
||||
|
||||
defp d(?0), do: 0
|
||||
defp d(?1), do: 1
|
||||
defp d(?2), do: 2
|
||||
defp d(?3), do: 3
|
||||
defp d(?4), do: 4
|
||||
defp d(?5), do: 5
|
||||
defp d(?6), do: 6
|
||||
defp d(?7), do: 7
|
||||
defp d(?8), do: 8
|
||||
defp d(?9), do: 9
|
||||
defp d(?A), do: 10
|
||||
defp d(?B), do: 11
|
||||
defp d(?C), do: 12
|
||||
defp d(?D), do: 13
|
||||
defp d(?E), do: 14
|
||||
defp d(?F), do: 15
|
||||
defp d(?a), do: 10
|
||||
defp d(?b), do: 11
|
||||
defp d(?c), do: 12
|
||||
defp d(?d), do: 13
|
||||
defp d(?e), do: 14
|
||||
defp d(?f), do: 15
|
||||
defp d(_), do: throw(:error)
|
||||
end
|
||||
Reference in New Issue
Block a user