chewbranca commented on code in PR #5602: URL: https://github.com/apache/couchdb/pull/5602#discussion_r2221219324
########## src/couch_stats/src/csrt_logger.erl: ########## @@ -0,0 +1,592 @@ +% Licensed under the Apache License, Version 2.0 (the "License"); you may not +% use this file except in compliance with the License. You may obtain a copy of +% the License at +% +% http://www.apache.org/licenses/LICENSE-2.0 +% +% Unless required by applicable law or agreed to in writing, software +% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +% License for the specific language governing permissions and limitations under +% the License. + +-module(csrt_logger). + +%% Process lifetime logging api +-export([ + get_tracker/0, + log_process_lifetime_report/1, + put_tracker/1, + stop_tracker/0, + stop_tracker/1, + track/1, + tracker/1 +]). + +%% Raw API that bypasses is_enabled checks +-export([ + do_lifetime_report/1, + do_status_report/1, + do_report/2, + maybe_report/2, + should_truncate_reports/0 +]). + +%% gen_server callbacks +-export([ + start_link/0, + init/1, + handle_call/3, + handle_cast/2, + handle_info/2 +]). + +%% Config update subscription API +-export([ + subscribe_changes/0, + handle_config_change/5, + handle_config_terminate/3 +]). + +%% Matchers +-export([ + deregister_matcher/1, + find_all_matches/2, + find_matches/2, + get_matcher/1, + get_matchers/0, + get_registered_matchers/0, + is_match/1, + is_match/2, + matcher_on_dbname/1, + matcher_on_docs_read/1, + matcher_on_docs_written/1, + matcher_on_rows_read/1, + matcher_on_changes_processed/1, + matcher_on_ioq_calls/1, + matcher_on_nonce/1, + matcher_on_long_reqs/1, + register_matcher/2, + reload_matchers/0 +]). + +%% Recon API Ports of https://github.com/ferd/recon/releases/tag/2.5.6 +-export([ + pid_ref_attrs/1, + pid_ref_matchspec/1, + proc_window/3 +]). + +-include_lib("stdlib/include/ms_transform.hrl"). +-include_lib("csrt.hrl"). + +-record(st, { + registered_matchers = #{} +}). + +-spec track(Rctx :: rctx()) -> pid(). +track(#rctx{pid_ref = PidRef}) -> + case get_tracker() of + undefined -> + Pid = spawn(?MODULE, tracker, [PidRef]), + put_tracker(Pid), + Pid; + Pid when is_pid(Pid) -> + Pid + end. + +-spec tracker(PidRef :: pid_ref()) -> ok. +tracker({Pid, _Ref} = PidRef) -> + MonRef = erlang:monitor(process, Pid), + receive + stop -> + log_process_lifetime_report(PidRef), + csrt_server:destroy_resource(PidRef), + ok; + {'DOWN', MonRef, _Type, _0DPid, _Reason0} -> + %% TODO: should we pass reason to log_process_lifetime_report? + %% Reason = case Reason0 of + %% {shutdown, Shutdown0} -> + %% Shutdown = atom_to_binary(Shutdown0), + %% <<"shutdown: ", Shutdown/binary>>; + %% Reason0 -> + %% Reason0 + %% end, + %% TODO: should we send the induced work delta to the coordinator? + log_process_lifetime_report(PidRef), + csrt_server:destroy_resource(PidRef), + ok + end. + +-spec register_matcher(Name, MSpec) -> ok | {error, badarg} when + Name :: string(), MSpec :: ets:match_spec(). +register_matcher(Name, MSpec) -> + gen_server:call(?MODULE, {register, Name, MSpec}, infinity). + +-spec deregister_matcher(Name :: string()) -> ok. +deregister_matcher(Name) -> + gen_server:call(?MODULE, {deregister, Name}). Review Comment: Good call, fixed. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@couchdb.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
