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simplified paxos functions

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This commit is contained in:
Andre Henriques
2024-01-07 15:02:11 +00:00
parent bc89023c9b
commit e00e07a057
4 changed files with 91 additions and 44664 deletions
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123
lib/paxos.ex
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@@ -26,32 +26,25 @@ defmodule Paxos do
run(state)
end
def add_inst_map(state, inst, value, pid_to_inform, action) do
IO.puts("#{state.name} SET BALLOT VALUE 3 nil")
instmap =
Map.put(state.instmap, inst, %{
value: value,
ballot: 0,
ballot_value: nil,
prepared_values: [],
accepted: 0,
accepted_ballot: nil,
accepted_value: nil,
pid_to_inform: pid_to_inform,
has_sent_accept: false,
action: action,
})
%{state | instmap: instmap}
end
def has_or_create(state, inst) do
def has_or_create(state, inst, value \\ nil, pid_to_inform \\ nil, action \\ nil) do
if Map.has_key?(state.instmap, inst) do
state
else
add_inst_map(state, inst, nil, nil, nil)
instmap =
Map.put(state.instmap, inst, %{
value: value,
ballot: 0,
ballot_value: nil,
prepared_values: [],
accepted: 0,
accepted_ballot: nil,
accepted_value: nil,
pid_to_inform: pid_to_inform,
has_sent_accept: false,
action: action,
})
%{state | instmap: instmap}
end
end
@@ -81,7 +74,7 @@ defmodule Paxos do
not Map.has_key?(state.instmap, inst) ->
EagerReliableBroadcast.broadcast(state.name, {:other_propose, inst, value})
state = add_inst_map(state, inst, value, pid_to_inform, action)
state = has_or_create(state, inst, value, pid_to_inform, action)
Process.send_after(self(), {:timeout, inst}, t)
prepare(state, inst)
@@ -90,12 +83,12 @@ defmodule Paxos do
Process.send_after(self(), {:timeout, inst}, t)
prepare(
set_instmap(state, inst, %{
state.instmap[inst]
set_instmap(state, inst, fn map -> %{
map
| value: value,
pid_to_inform: pid_to_inform,
action: action,
}),
} end),
inst
)
@@ -127,7 +120,6 @@ defmodule Paxos do
state
not Map.has_key?(state.instmap, inst) ->
IO.puts("I think that is the cause")
state = has_or_create(state, inst)
Utils.unicast(
@@ -136,10 +128,10 @@ defmodule Paxos do
proc
)
set_instmap(state, inst, %{
state.instmap[inst]
set_instmap(state, inst, fn map -> %{
map
| ballot: ballot
})
} end)
ballot > state.instmap[inst].ballot ->
Utils.unicast(
@@ -148,10 +140,10 @@ defmodule Paxos do
proc
)
set_instmap(state, inst, %{
state.instmap[inst]
set_instmap(state, inst, fn map -> %{
map
| ballot: ballot
})
} end)
true ->
Utils.unicast({:nack, inst, ballot}, proc)
@@ -177,9 +169,9 @@ defmodule Paxos do
send(state.instmap[inst].pid_to_inform, {:abort, inst})
end
set_instmap(state, inst, %{
state.instmap[inst] | has_sent_accept: false
})
set_instmap(state, inst, fn map -> %{
map | has_sent_accept: false
} end)
true ->
state
@@ -196,13 +188,10 @@ defmodule Paxos do
ballot == state.instmap[inst].ballot ->
state =
set_instmap(state, inst, %{
state.instmap[inst]
| prepared_values:
state.instmap[inst].prepared_values ++ [{accepted_ballot, accepted_value}]
})
IO.puts("#{state.name} Try to run prepared")
set_instmap(state, inst, fn map -> %{
map
| prepared_values: map.prepared_values ++ [{accepted_ballot, accepted_value}]
} end)
prepared(state, inst)
@@ -228,12 +217,12 @@ defmodule Paxos do
Utils.unicast({:accepted, inst, ballot}, proc)
set_instmap(state, inst, %{
state.instmap[inst]
set_instmap(state, inst, fn map -> %{
map
| ballot: ballot,
accepted_value: value,
accepted_ballot: ballot
})
} end)
else
IO.puts("#{state.name} -> #{proc} nack")
Utils.unicast({:nack, inst, ballot}, proc)
@@ -249,10 +238,10 @@ defmodule Paxos do
else
if state.leader == state.name and state.instmap[inst].ballot == ballot do
accepted(
set_instmap(state, inst, %{
state.instmap[inst]
| accepted: state.instmap[inst].accepted + 1
}),
set_instmap(state, inst, fn map -> %{
map
| accepted: map.accepted + 1
} end),
inst
)
else
@@ -297,8 +286,8 @@ defmodule Paxos do
)
end
def set_instmap(state, inst, instmap) do
new_instmap = Map.put(state.instmap, inst, instmap)
def set_instmap(state, inst, set_instmap) do
new_instmap = Map.put(state.instmap, inst, set_instmap.(state.instmap[inst]))
%{state | instmap: new_instmap}
end
@@ -321,14 +310,13 @@ defmodule Paxos do
IO.puts("#{state.name} sending all prepare #{inst} #{ballot}")
EagerReliableBroadcast.broadcast(state.name, {:prepare, state.name, inst, ballot})
IO.puts("#{state.name} SET BALLOT VALUE 2 nil")
set_instmap(state, inst, %{
state.instmap[inst]
set_instmap(state, inst, fn map -> %{
map
| prepared_values: [],
accepted: 0,
ballot_value: nil,
has_sent_accept: false
})
} end)
end
end
@@ -338,7 +326,6 @@ defmodule Paxos do
def prepared(state, _) when state.leader != state.name, do: state
def prepared(state, inst) do
IO.puts("#{state.name} #{length(state.processes)} #{length(state.instmap[inst].prepared_values)} #{state.instmap[inst].has_sent_accept}")
if length(state.instmap[inst].prepared_values) >= floor(length(state.processes) / 2) + 1 and
not state.instmap[inst].has_sent_accept do
{_, a_val} =
@@ -367,13 +354,11 @@ defmodule Paxos do
{:accept, inst, state.instmap[inst].ballot, a_val}
)
IO.puts("#{state.name} SET BALLOT VALUE #{inspect(a_val)}")
set_instmap(state, inst, %{
state.instmap[inst]
set_instmap(state, inst, fn map -> %{
map
| ballot_value: a_val,
has_sent_accept: true
})
} end)
else
state
end
@@ -412,22 +397,12 @@ defmodule Paxos do
end
end
def propose_action(pid, inst, value, t, action) do
# Utils.unicast({:propose, value}, name)
def propose(pid, inst, value, t, action \\ nil) do
send(pid, {:propose, inst, value, t, self(), action})
propose_loop(inst)
end
def propose(pid, inst, value, t) do
# Utils.unicast({:propose, value}, name)
send(pid, {:propose, inst, value, t, self(), nil})
propose_loop(inst)
end
def propose_loop(inInst) do
receive do
{:timeout, inst} ->