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config: make amqp settings configurable via config or distillery #14

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config: make amqp settings configurable via config or distillery #14

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11 changes: 11 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -22,3 +22,14 @@ If [available in Hex](https://hex.pm/docs/publish), the package can be installed
end
```

3. Optional - configure via `config/config.exs` and friends; this support also works well with Distillery

```elixir
use Mix.Config

config :wabbit,
host: "localhost",
port: 5672,
username: "guest",
password: "guest"
```
32 changes: 18 additions & 14 deletions lib/wabbit/connection.ex
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Expand Up @@ -143,25 +143,29 @@ defmodule Wabbit.Connection do
:amqp_connection.close(state.conn)
end

defp get_param(options, key, default) do
# get parameter from options, app configuration, or default
Keyword.get(options, key, Application.get_env(:wabbit, key, default))
end

defp open(options) when is_list(options) do
options = options |> normalize_ssl_options

amqp_params =
amqp_params_network(
username: Keyword.get(options, :username, "guest"),
password: Keyword.get(options, :password, "guest"),
virtual_host: Keyword.get(options, :virtual_host, "/"),
host: Keyword.get(options, :host, 'localhost') |> to_charlist,
port: Keyword.get(options, :port, :undefined),
channel_max: Keyword.get(options, :channel_max, 0),
frame_max: Keyword.get(options, :frame_max, 0),
heartbeat: Keyword.get(options, :heartbeat, 0),
connection_timeout: Keyword.get(options, :connection_timeout, :infinity),
ssl_options: Keyword.get(options, :ssl_options, :none),
client_properties: Keyword.get(options, :client_properties, []),
socket_options: Keyword.get(options, :socket_options, []),
auth_mechanisms: Keyword.get(options, :auth_mechanisms, [&:amqp_auth_mechanisms.plain/3, &:amqp_auth_mechanisms.amqplain/3]))

username: get_param(options, :username, "guest"),
password: get_param(options, :password, "guest"),
virtual_host: get_param(options, :virtual_host, "/"),
host: get_param(options, :host, 'localhost') |> to_charlist,
port: get_param(options, :port, :undefined),
channel_max: get_param(options, :channel_max, 0),
frame_max: get_param(options, :frame_max, 0),
heartbeat: get_param(options, :heartbeat, 0),
connection_timeout: get_param(options, :connection_timeout, :infinity),
ssl_options: get_param(options, :ssl_options, :none),
client_properties: get_param(options, :client_properties, []),
socket_options: get_param(options, :socket_options, []),
auth_mechanisms: get_param(options, :auth_mechanisms, [&:amqp_auth_mechanisms.plain/3, &:amqp_auth_mechanisms.amqplain/3]))
case :amqp_connection.start(amqp_params) do
{:ok, pid} -> {:ok, pid}
error -> error
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