commit 353dd21fde31890c35af7aad68f30dde3eb52a87
author Steve Strong <steve@srstrong.com> Mon Apr 22 00:39:29 2013 -0400
committer Andrew Thompson <andrew@hijacked.us> Mon Apr 22 00:41:11 2013 -0400
tree e81c0566fb75fedda9c2152b34b64f535eb8d309
parent 478dec45868585b57b7c5b6d07d62f05d5a7b4a9

Implement persistent traces in config file

src/lager_app.erl

diff --git a/src/lager_app.erl b/src/lager_app.erl
index 99ecd4f..68a90c0 100644
--- a/src/lager_app.erl
+++ b/src/lager_app.erl
@@ -60,6 +60,8 @@
     _ = [supervisor:start_child(lager_handler_watcher_sup, [lager_event, Module, Config]) ||
         {Module, Config} <- expand_handlers(Handlers)],
 
+    ok = add_configured_traces(),
+
     %% mask the messages we have no use for
     lager:update_loglevel_config(),
 
@@ -118,6 +120,20 @@
 expand_handlers([H|T]) ->
     [H | expand_handlers(T)].
 
+add_configured_traces() ->
+    Traces = case application:get_env(lager, traces) of
+        undefined ->
+            [];
+        {ok, TraceVal} ->
+            TraceVal
+    end,
+
+    lists:foreach(fun({Handler, Filter, Level}) ->
+                {ok, _} = lager:trace(Handler, Filter, Level)
+        end,
+        Traces),
+    ok.
+
 maybe_make_handler_id(Mod, Config) ->
     %% Allow the backend to generate a gen_event handler id, if it wants to.
     %% We don't use erlang:function_exported here because that requires the module