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phoenix
1.1.0
1.8.9
1.8.8
1.8.7
1.8.6
1.8.5
1.8.4
1.8.3
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1.3.5
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1.3.0-rc.1
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1.2.4
1.2.3
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1.1.9
1.1.8
1.1.7
1.1.6
1.1.5
1.1.4
1.1.3
1.1.2
1.1.1
1.1.0
1.0.6
1.0.5
1.0.4
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1.0.1
1.0.0
0.17.1
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0.13.1
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0.9.0
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0.7.0
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0.2.7
0.2.6
0.2.5
0.2.4
0.2.3
0.2.2
0.2.1
0.2.0
0.1.0
Productive. Reliable. Fast. A productive web framework that does not compromise speed or maintainability.
Security advisory:
This version has known vulnerabilities.
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Files
lib/phoenix/pubsub/gc.ex
defmodule Phoenix.PubSub.GC do
@moduledoc """
A garbage collector process that cleans up the table used
by `Phoenix.PubSub.Local`.
"""
use GenServer
@doc """
Starts the server.
* `server_name` - The name to register the server under
* `table_name` - The name of the local table
"""
def start_link(server_name, local_name) do
GenServer.start_link(__MODULE__, {server_name, local_name}, name: server_name)
end
@doc """
Force table clean up because the given pid is down asynchronously.
* `gc_server` - The registered server name or pid
* `pid` - The subscriber pid
## Examples
iex> down(:gc_server, self)
:ok
"""
def down(gc_server, pid) when is_atom(gc_server) do
GenServer.cast(gc_server, {:down, pid})
end
@doc """
Removes subscriber's subscription for topic
"""
def unsubscribe(pid, topic, topics_table, pids_table) do
true = :ets.match_delete(topics_table, {topic, {pid, :_}})
true = :ets.delete_object(pids_table, {pid, topic})
:ok
end
def init({server_name, local_name}) do
{:ok, %{topics: local_name, pids: server_name}}
end
def handle_call({:subscription, pid}, _from, state) do
try do
{:reply, :ets.lookup_element(state.pids, pid, 2), state}
catch
:error, :badarg -> {:reply, [], state}
end
end
def handle_cast({:down, pid}, state) do
try do
topics = :ets.lookup_element(state.pids, pid, 2)
for topic <- topics do
true = :ets.match_delete(state.topics, {topic, {pid, :_}})
end
true = :ets.match_delete(state.pids, {pid, :_})
catch
:error, :badarg -> :badarg
end
{:noreply, state}
end
end