aboutsummaryrefslogtreecommitdiffstats
path: root/lib/kernel/src/logger_disk_log_h.erl
diff options
context:
space:
mode:
authorSiri Hansen <[email protected]>2018-04-24 14:26:31 +0200
committerSiri Hansen <[email protected]>2018-04-26 14:37:30 +0200
commit0deea4a8f369013ec00e231d0c2c37e4ab3f0ba1 (patch)
tree054b8465a9eb07b07fde4596f2209ee1df689a92 /lib/kernel/src/logger_disk_log_h.erl
parent0183ddffb112d898d9b8c0396afa7f2210b9e169 (diff)
downloadotp-0deea4a8f369013ec00e231d0c2c37e4ab3f0ba1.tar.gz
otp-0deea4a8f369013ec00e231d0c2c37e4ab3f0ba1.tar.bz2
otp-0deea4a8f369013ec00e231d0c2c37e4ab3f0ba1.zip
Add logger
Diffstat (limited to 'lib/kernel/src/logger_disk_log_h.erl')
-rw-r--r--lib/kernel/src/logger_disk_log_h.erl694
1 files changed, 694 insertions, 0 deletions
diff --git a/lib/kernel/src/logger_disk_log_h.erl b/lib/kernel/src/logger_disk_log_h.erl
new file mode 100644
index 0000000000..3b71f936d8
--- /dev/null
+++ b/lib/kernel/src/logger_disk_log_h.erl
@@ -0,0 +1,694 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% 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.
+%%
+%% %CopyrightEnd%
+%%
+-module(logger_disk_log_h).
+
+-behaviour(gen_server).
+
+-include("logger.hrl").
+-include("logger_internal.hrl").
+-include("logger_h_common.hrl").
+
+%%% API
+-export([start_link/3, info/1, disk_log_sync/1, reset/1]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
+ terminate/2, code_change/3]).
+
+%% logger callbacks
+-export([log/2,
+ adding_handler/2, removing_handler/1,
+ changing_config/3, swap_buffer/2]).
+
+%%%===================================================================
+%%% API
+%%%===================================================================
+
+%%%-----------------------------------------------------------------
+%%% Start a disk_log handler process and link to caller.
+%%% This function is called by the kernel supervisor when this
+%%% handler process gets added (as a result of calling add/3).
+-spec start_link(Name, Config, HandlerState) -> {ok,Pid} | {error,Reason} when
+ Name :: atom(),
+ Config :: logger:config(),
+ HandlerState :: map(),
+ Pid :: pid(),
+ Reason :: term().
+
+start_link(Name, Config, HandlerState) ->
+ proc_lib:start_link(?MODULE,init,[[Name,Config,HandlerState]]).
+
+%%%-----------------------------------------------------------------
+%%%
+-spec disk_log_sync(Name) -> ok | {error,Reason} when
+ Name :: atom(),
+ Reason :: handler_busy | {badarg,term()}.
+
+disk_log_sync(Name) when is_atom(Name) ->
+ try
+ gen_server:call(Name, disk_log_sync, ?DEFAULT_CALL_TIMEOUT)
+ catch
+ _:{timeout,_} -> {error,handler_busy}
+ end;
+disk_log_sync(Name) ->
+ {error,{badarg,{disk_log_sync,[Name]}}}.
+
+%%%-----------------------------------------------------------------
+%%%
+-spec info(Name) -> Info | {error,Reason} when
+ Name :: atom(),
+ Info :: term(),
+ Reason :: handler_busy | {badarg,term()}.
+
+info(Name) when is_atom(Name) ->
+ try
+ gen_server:call(Name, info, ?DEFAULT_CALL_TIMEOUT)
+ catch
+ _:{timeout,_} -> {error,handler_busy}
+ end;
+info(Name) ->
+ {error,{badarg,{info,[Name]}}}.
+
+%%%-----------------------------------------------------------------
+%%%
+-spec reset(Name) -> ok | {error,Reason} when
+ Name :: atom(),
+ Reason :: handler_busy | {badarg,term()}.
+
+reset(Name) when is_atom(Name) ->
+ try
+ gen_server:call(Name, reset, ?DEFAULT_CALL_TIMEOUT)
+ catch
+ _:{timeout,_} -> {error,handler_busy}
+ end;
+reset(Name) ->
+ {error,{badarg,{reset,[Name]}}}.
+
+
+%%%===================================================================
+%%% logger callbacks
+%%%===================================================================
+
+%%%-----------------------------------------------------------------
+%%% Handler being added
+adding_handler(Name, Config) ->
+ case check_config(adding, Name, Config) of
+ {ok, Config1} ->
+ %% create initial handler state by merging defaults with config
+ HConfig = maps:get(?MODULE, Config1, #{}),
+ HState = maps:merge(get_init_state(), HConfig),
+ case logger_h_common:overload_levels_ok(HState) of
+ true ->
+ case start(Name, Config1, HState) of
+ ok ->
+ %% Make sure wait_for_buffer is not stored, so we
+ %% won't hang and wait for buffer on a restart
+ {ok, maps:remove(wait_for_buffer,Config1)};
+ Error ->
+ Error
+ end;
+ false ->
+ #{toggle_sync_qlen := TSQL,
+ drop_new_reqs_qlen := DNRQL,
+ flush_reqs_qlen := FRQL} = HState,
+ {error,{invalid_levels,{TSQL,DNRQL,FRQL}}}
+ end;
+ Error ->
+ Error
+ end.
+
+%%%-----------------------------------------------------------------
+%%% Updating handler config
+changing_config(Name,
+ OldConfig=#{id:=Id, disk_log_opts:=DLOpts},
+ NewConfig=#{id:=Id, disk_log_opts:=DLOpts}) ->
+ case check_config(changing, Name, NewConfig) of
+ Result = {ok,NewConfig1} ->
+ try gen_server:call(Name, {change_config,OldConfig,NewConfig1},
+ ?DEFAULT_CALL_TIMEOUT) of
+ ok -> Result;
+ HError -> HError
+ catch
+ _:{timeout,_} -> {error,handler_busy}
+ end;
+ Error ->
+ Error
+ end;
+changing_config(_Name, OldConfig, NewConfig) ->
+ {error,{illegal_config_change,OldConfig,NewConfig}}.
+
+check_config(adding, Name, Config0) ->
+ %% Merge in defaults on top level
+ Config = maps:merge(#{id => Name}, Config0),
+ %% Merge in defaults on handler level
+ LogOpts0 = maps:get(disk_log_opts, Config, #{}),
+ LogOpts = merge_default_logopts(Name, LogOpts0),
+ case check_log_opts(maps:to_list(LogOpts)) of
+ ok ->
+ MyConfig = maps:get(?MODULE, Config, #{}),
+ case check_my_config(maps:to_list(MyConfig)) of
+ ok ->
+ {ok,Config#{disk_log_opts=>LogOpts,
+ ?MODULE=>MyConfig}};
+ Error ->
+ Error
+ end;
+ Error ->
+ Error
+ end;
+check_config(changing, _Name, Config) ->
+ MyConfig = maps:get(?MODULE, Config, #{}),
+ case check_my_config(maps:to_list(MyConfig)) of
+ ok -> {ok,Config};
+ Error -> Error
+ end.
+
+merge_default_logopts(Name, LogOpts) ->
+ Type = maps:get(type, LogOpts, wrap),
+ {DefaultNoFiles,DefaultNoBytes} =
+ case Type of
+ halt -> {undefined,infinity};
+ _wrap -> {10,1048576}
+ end,
+ {ok,Dir} = file:get_cwd(),
+ Default = #{file => filename:join(Dir,Name),
+ max_no_files => DefaultNoFiles,
+ max_no_bytes => DefaultNoBytes,
+ type => Type},
+ maps:merge(Default,LogOpts).
+
+check_log_opts([{file,File}|Opts]) when is_list(File) ->
+ check_log_opts(Opts);
+check_log_opts([{max_no_files,undefined}|Opts]) ->
+ check_log_opts(Opts);
+check_log_opts([{max_no_files,N}|Opts]) when is_integer(N), N>0 ->
+ check_log_opts(Opts);
+check_log_opts([{max_no_bytes,infinity}|Opts]) ->
+ check_log_opts(Opts);
+check_log_opts([{max_no_bytes,N}|Opts]) when is_integer(N), N>0 ->
+ check_log_opts(Opts);
+check_log_opts([{type,Type}|Opts]) when Type==wrap; Type==halt ->
+ check_log_opts(Opts);
+check_log_opts([Invalid|_]) ->
+ {error,{invalid_config,disk_log_opt,Invalid}};
+check_log_opts([]) ->
+ ok.
+
+check_my_config([Other | Config]) ->
+ case logger_h_common:check_common_config(Other) of
+ valid ->
+ check_my_config(Config);
+ invalid ->
+ {error,{invalid_config,?MODULE,Other}}
+ end;
+check_my_config([]) ->
+ ok.
+
+%%%-----------------------------------------------------------------
+%%% Handler being removed
+removing_handler(Name) ->
+ stop(Name).
+
+%%%-----------------------------------------------------------------
+%%% Get buffer when swapping from simple handler
+swap_buffer(Name,Buffer) ->
+ case whereis(Name) of
+ undefined ->
+ ok;
+ _ ->
+ Name ! {buffer,Buffer}
+ end.
+
+%%%-----------------------------------------------------------------
+%%% Log a string or report
+-spec log(Log, Config) -> ok | dropped when
+ Log :: logger:log(),
+ Config :: logger:config().
+
+log(Log,Config=#{id:=Name}) ->
+ %% if the handler has crashed, we must drop this request
+ %% and hope the handler restarts so we can try again
+ true = is_pid(whereis(Name)),
+ Bin = logger_h_common:log_to_binary(Log,Config),
+ logger_h_common:call_cast_or_drop(Name, Bin).
+
+
+%%%===================================================================
+%%% gen_server callbacks
+%%%===================================================================
+
+init([Name, Config = #{disk_log_opts := LogOpts},
+ State = #{dl_sync_int := DLSyncInt}]) ->
+ register(Name, self()),
+ process_flag(trap_exit, true),
+ process_flag(message_queue_data, off_heap),
+
+ ?init_test_hooks(),
+ ?start_observation(Name),
+
+ case open_disk_log(Name, LogOpts) of
+ ok ->
+ catch ets:new(Name, [public, named_table]),
+ ?set_mode(Name, async),
+ proc_lib:init_ack({ok,self()}),
+ T0 = ?timestamp(),
+ State1 =
+ ?merge_with_stats(State#{id => Name,
+ mode => async,
+ dl_sync => DLSyncInt,
+ log_opts => LogOpts,
+ last_qlen => 0,
+ last_log_ts => T0,
+ burst_win_ts => T0,
+ burst_msg_count => 0,
+ prev_log_result => ok,
+ prev_sync_result => ok,
+ prev_disk_log_info => undefined}),
+ gen_server:cast(self(), {repeated_disk_log_sync,T0}),
+ enter_loop(Config, State1);
+ Error ->
+ logger_h_common:error_notify({open_disk_log,Name,Error}),
+ proc_lib:init_ack(Error)
+ end.
+
+enter_loop(#{wait_for_buffer:=true}=Config,State) ->
+ State1 =
+ receive
+ {buffer,Buffer} ->
+ lists:foldl(
+ fun(Log,S) ->
+ Bin = logger_h_common:log_to_binary(Log,Config),
+ {_,S1} = do_log(Bin,cast,S),
+ S1
+ end,
+ State,
+ Buffer)
+ end,
+ gen_server:enter_loop(?MODULE,[],State1);
+enter_loop(_Config,State) ->
+ gen_server:enter_loop(?MODULE,[],State).
+
+%% This is the synchronous log request.
+handle_call({log, Bin}, _From, State) ->
+ {Result,State1} = do_log(Bin, call, State),
+ %% Result == ok | dropped
+ {reply, Result, State1};
+
+handle_call(disk_log_sync, _From, State = #{id := Name}) ->
+ State1 = #{prev_sync_result := Result} = disk_log_sync(Name, State),
+ {reply, Result, State1};
+
+handle_call({change_config,_OldConfig,NewConfig}, _From,
+ State = #{filesync_repeat_interval := FSyncInt0,
+ last_log_ts := LastLogTS}) ->
+ HConfig = maps:get(?MODULE, NewConfig, #{}),
+ State1 = #{toggle_sync_qlen := TSQL,
+ drop_new_reqs_qlen := DNRQL,
+ flush_reqs_qlen := FRQL} = maps:merge(State, HConfig),
+ case logger_h_common:overload_levels_ok(State1) of
+ true ->
+ _ =
+ case maps:get(filesync_repeat_interval, HConfig, undefined) of
+ undefined ->
+ ok;
+ no_repeat ->
+ _ = logger_h_common:cancel_timer(maps:get(rep_sync_tref,
+ State,
+ undefined));
+ FSyncInt0 ->
+ ok;
+ _FSyncInt1 ->
+ _ = logger_h_common:cancel_timer(maps:get(rep_sync_tref,
+ State,
+ undefined)),
+ _ = gen_server:cast(self(), {repeated_disk_log_sync,
+ LastLogTS})
+ end,
+ {reply, ok, State1};
+ false ->
+ {reply, {error,{invalid_levels,{TSQL,DNRQL,FRQL}}}, State}
+ end;
+
+handle_call(info, _From, State) ->
+ {reply, State, State};
+
+handle_call(reset, _From, State) ->
+ State1 = ?merge_with_stats(State),
+ {reply, ok, State1#{last_qlen => 0,
+ last_log_ts => ?timestamp(),
+ prev_log_result => ok,
+ prev_sync_result => ok,
+ prev_disk_log_info => undefined}};
+
+handle_call(stop, _From, State) ->
+ {stop, {shutdown,stopped}, ok, State}.
+
+
+%% This is the asynchronous log request.
+handle_cast({log, Bin}, State) ->
+ {_,State1} = do_log(Bin, cast, State),
+ {noreply, State1};
+
+%% If FILESYNC_REPEAT_INTERVAL is set to a millisec value, this
+%% clause gets called repeatedly by the handler. In order to
+%% guarantee that a filesync *always* happens after the last log
+%% request, the repeat operation must be active!
+handle_cast({repeated_disk_log_sync,LastLogTS0},
+ State = #{id := Name,
+ filesync_repeat_interval := FSyncInt,
+ last_log_ts := LastLogTS1}) ->
+ State1 =
+ if is_integer(FSyncInt) ->
+ %% only do filesync if something has been
+ %% written since last time we checked
+ NewState = if LastLogTS1 == LastLogTS0 ->
+ State;
+ true ->
+ disk_log_sync(Name, State)
+ end,
+ {ok,TRef} =
+ timer:apply_after(FSyncInt, gen_server,cast,
+ [self(),
+ {repeated_disk_log_sync,LastLogTS1}]),
+ NewState#{rep_sync_tref => TRef};
+ true ->
+ State
+ end,
+ {noreply,State1}.
+
+%% The disk log owner must handle status messages from disk_log.
+handle_info({disk_log, _Node, _Log, {wrap,_NoLostItems}}, State) ->
+ {noreply, State};
+handle_info({disk_log, _Node, Log, Info = {truncated,_NoLostItems}},
+ State = #{id := Name, prev_disk_log_info := PrevInfo}) ->
+ error_notify_new(Info, PrevInfo, {disk_log,Name,Log,Info}),
+ {noreply, State#{prev_disk_log_info => Info}};
+handle_info({disk_log, _Node, Log, Info = {blocked_log,_Items}},
+ State = #{id := Name, prev_disk_log_info := PrevInfo}) ->
+ error_notify_new(Info, PrevInfo, {disk_log,Name,Log,Info}),
+ {noreply, State#{prev_disk_log_info => Info}};
+handle_info({disk_log, _Node, Log, full},
+ State = #{id := Name, prev_disk_log_info := PrevInfo}) ->
+ error_notify_new(full, PrevInfo, {disk_log,Name,Log,full}),
+ {noreply, State#{prev_disk_log_info => full}};
+handle_info({disk_log, _Node, Log, Info = {error_status,_Status}},
+ State = #{id := Name, prev_disk_log_info := PrevInfo}) ->
+ error_notify_new(Info, PrevInfo, {disk_log,Name,Log,Info}),
+ {noreply, State#{prev_disk_log_info => Info}};
+
+handle_info({'EXIT',_Pid,_Why}, State = #{id := _Name}) ->
+ {noreply, State};
+
+handle_info(_, State) ->
+ {noreply, State}.
+
+terminate(Reason, State = #{id := Name}) ->
+ _ = logger_h_common:cancel_timer(maps:get(rep_sync_tref, State,
+ undefined)),
+ _ = close_disk_log(Name, normal),
+ logger_h_common:stop_or_restart(Name, Reason, State).
+
+code_change(_OldVsn, State, _Extra) ->
+ {ok, State}.
+
+%%%-----------------------------------------------------------------
+%%% Internal functions
+
+%%%-----------------------------------------------------------------
+%%%
+get_init_state() ->
+ #{toggle_sync_qlen => ?TOGGLE_SYNC_QLEN,
+ drop_new_reqs_qlen => ?DROP_NEW_REQS_QLEN,
+ flush_reqs_qlen => ?FLUSH_REQS_QLEN,
+ enable_burst_limit => ?ENABLE_BURST_LIMIT,
+ burst_limit_size => ?BURST_LIMIT_SIZE,
+ burst_window_time => ?BURST_WINDOW_TIME,
+ enable_kill_overloaded => ?ENABLE_KILL_OVERLOADED,
+ handler_overloaded_qlen => ?HANDLER_OVERLOADED_QLEN,
+ handler_overloaded_mem => ?HANDLER_OVERLOADED_MEM,
+ handler_restart_after => ?HANDLER_RESTART_AFTER,
+ dl_sync_int => ?CONTROLLER_SYNC_INTERVAL,
+ filesync_ok_qlen => ?FILESYNC_OK_QLEN,
+ filesync_repeat_interval => ?FILESYNC_REPEAT_INTERVAL}.
+
+%%%-----------------------------------------------------------------
+%%% Add a disk_log handler to the logger.
+%%% This starts a dedicated handler process which should always
+%%% exist if the handler is registered with logger (and should not
+%%% exist if the handler is not registered).
+%%%
+%%% Config is the logger:config() map containing a sub map with any of
+%%% the following associations:
+%%%
+%%% Config = #{disk_log_opts => #{file => file:filename(),
+%%% max_no_bytes => integer(),
+%%% max_no_files => integer(),
+%%% type => wrap | halt}}.
+%%%
+%%% This map will be merged with the logger configuration data for
+%%% the disk_log LogName. If type == halt, then max_no_files is
+%%% ignored.
+%%%
+%%% Handler specific config should be provided with a sub map associated
+%%% with a key named the same as this module, e.g:
+%%%
+%%% Config = #{logger_disk_log_h => #{toggle_sync_qlen => 50}
+%%%
+%%% The disk_log handler process is linked to logger_sup, which is
+%%% part of the kernel application's supervision tree.
+start(Name, Config, HandlerState) ->
+ LoggerDLH =
+ #{id => Name,
+ start => {?MODULE, start_link, [Name,Config,HandlerState]},
+ restart => temporary,
+ shutdown => 2000,
+ type => worker,
+ modules => [?MODULE]},
+ case supervisor:start_child(logger_sup, LoggerDLH) of
+ {ok,_} ->
+ ok;
+ Error ->
+ Error
+ end.
+
+%%%-----------------------------------------------------------------
+%%% Stop and remove the handler.
+stop(Name) ->
+ case whereis(Name) of
+ undefined ->
+ ok;
+ _ ->
+ %% We don't want to do supervisor:terminate_child here
+ %% since we need to distinguish this explicit stop from a
+ %% system termination in order to avoid circular attempts
+ %% at removing the handler (implying deadlocks and
+ %% timeouts).
+ _ = gen_server:call(Name,stop),
+ _ = supervisor:delete_child(logger_sup, Name),
+ ok
+ end.
+
+%%%-----------------------------------------------------------------
+%%% Logging and overload control.
+-define(update_dl_sync(C, Interval),
+ if C == 0 -> Interval;
+ true -> C-1 end).
+
+%% check for overload between every request (and set Mode to async,
+%% sync or drop accordingly), but never flush the whole mailbox
+%% before LogWindowSize requests have been handled
+do_log(Bin, CallOrCast, State = #{id:=Name, mode := _Mode0}) ->
+ T1 = ?timestamp(),
+
+ %% check if the handler is getting overloaded, or if it's
+ %% recovering from overload (the check must be done for each
+ %% request to react quickly to large bursts of requests and
+ %% to ensure that the handler can never end up in drop mode
+ %% with an empty mailbox, which would stop operation)
+ {Mode1,QLen,Mem,State1} = logger_h_common:check_load(State),
+
+ %% kill the handler if it can't keep up with the load
+ logger_h_common:kill_if_choked(Name, QLen, Mem, State),
+
+ if Mode1 == flush ->
+ flush(Name, QLen, T1, State1);
+ true ->
+ write(Name, Mode1, T1, Bin, CallOrCast, State1)
+ end.
+
+%% this function is called by do_log/3 after an overload check
+%% has been performed, where QLen > FlushQLen
+flush(Name, _QLen0, T1, State=#{last_log_ts := _T0}) ->
+ %% flush messages in the mailbox (a limited number in
+ %% order to not cause long delays)
+ _NewFlushed = logger_h_common:flush_log_requests(?FLUSH_MAX_N),
+
+ %% because of the receive loop when flushing messages, the
+ %% handler will be scheduled out often and the mailbox could
+ %% grow very large, so we'd better check the queue again here
+ {_,_QLen1} = process_info(self(), message_queue_len),
+ ?observe(Name,{max_qlen,_QLen1}),
+
+ %% Add 1 for the current log request
+ ?observe(Name,{flushed,_NewFlushed+1}),
+
+ State1 = ?update_max_time(?diff_time(T1,_T0),State),
+ {dropped,?update_other(flushed,FLUSHED,_NewFlushed,
+ State1#{mode => ?set_mode(Name,async),
+ last_qlen => 0,
+ last_log_ts => T1})}.
+
+%% this function is called to write to disk_log
+write(Name, Mode, T1, Bin, _CallOrCast,
+ State = #{dl_sync := DLSync,
+ dl_sync_int := DLSyncInt,
+ last_qlen := LastQLen,
+ last_log_ts := T0}) ->
+ %% check if we need to limit the number of writes
+ %% during a burst of log requests
+ {DoWrite,BurstWinT,BurstMsgCount} = logger_h_common:limit_burst(State),
+
+ %% only send a synhrounous request to the disk_log process
+ %% every DLSyncInt time, to give the handler time between
+ %% writes so it can keep up with incoming messages
+ {Status,LastQLen1,State1} =
+ if DoWrite, DLSync == 0 ->
+ ?observe(Name,{_CallOrCast,1}),
+ NewState = disk_log_write(Name, Bin, State),
+ {ok, element(2,process_info(self(),message_queue_len)),
+ NewState};
+ DoWrite ->
+ ?observe(Name,{_CallOrCast,1}),
+ NewState = disk_log_write(Name, Bin, State),
+ {ok, LastQLen, NewState};
+ not DoWrite ->
+ ?observe(Name,{flushed,1}),
+ {dropped, LastQLen, State}
+ end,
+
+ %% Check if the time since the previous log request is long enough -
+ %% and the queue length small enough - to assume the mailbox has
+ %% been emptied, and if so, do filesync operation and reset mode to
+ %% async. Note that this is the best we can do to detect an idle
+ %% handler without setting a timer after each log call/cast. If the
+ %% time between two consecutive log requests is fast and no new
+ %% request comes in after the last one, idle state won't be detected!
+ Time = ?diff_time(T1,T0),
+ {Mode1,BurstMsgCount1,State2} =
+ if (LastQLen1 < ?FILESYNC_OK_QLEN) andalso
+ (Time > ?IDLE_DETECT_TIME_USEC) ->
+ {?change_mode(Name,Mode,async), 0, disk_log_sync(Name,State1)};
+ true ->
+ {Mode, BurstMsgCount,State1}
+ end,
+
+ State3 =
+ ?update_calls_or_casts(_CallOrCast,1,State2),
+ State4 =
+ ?update_max_time(Time,
+ State3#{mode => Mode1,
+ last_qlen := LastQLen1,
+ last_log_ts => T1,
+ burst_win_ts => BurstWinT,
+ burst_msg_count => BurstMsgCount1,
+ dl_sync => ?update_dl_sync(DLSync,DLSyncInt)}),
+ {Status,State4}.
+
+
+open_disk_log(Name, LogOpts) ->
+ #{file := File,
+ max_no_bytes := MaxNoBytes,
+ max_no_files := MaxNoFiles,
+ type := Type} = LogOpts,
+ case filelib:ensure_dir(File) of
+ ok ->
+ Size =
+ if Type == halt -> MaxNoBytes;
+ Type == wrap -> {MaxNoBytes,MaxNoFiles}
+ end,
+ Opts = [{name, Name},
+ {file, File},
+ {size, Size},
+ {type, Type},
+ {linkto, self()},
+ {repair, false},
+ {format, external},
+ {notify, true},
+ {quiet, true},
+ {mode, read_write}],
+ case disk_log:open(Opts) of
+ {ok,Name} ->
+ ok;
+ Error = {error,_Reason} ->
+ Error
+ end;
+ Error ->
+ Error
+ end.
+
+close_disk_log(Name, _) ->
+ _ = ?disk_log_sync(Name),
+ _ = disk_log:lclose(Name),
+ ok.
+
+disk_log_write(Name, Bin, State) ->
+ Result =
+ case ?disk_log_blog(Name, Bin) of
+ ok ->
+ ok;
+ LogError ->
+ _ = case maps:get(prev_log_result, State) of
+ LogError ->
+ %% don't report same error twice
+ ok;
+ _ ->
+ LogOpts = maps:get(log_opts, State),
+ logger_h_common:error_notify({Name,log,
+ LogOpts,
+ LogError})
+ end,
+ LogError
+ end,
+ State#{prev_log_result => Result}.
+
+disk_log_sync(Name, State) ->
+ Result =
+ case ?disk_log_sync(Name) of
+ ok ->
+ ok;
+ SyncError ->
+ _ = case maps:get(prev_sync_result, State) of
+ SyncError ->
+ %% don't report same error twice
+ ok;
+ _ ->
+ LogOpts = maps:get(log_opts, State),
+ logger_h_common:error_notify({Name,sync,
+ LogOpts,
+ SyncError})
+ end,
+ SyncError
+ end,
+ State#{prev_sync_result => Result}.
+
+error_notify_new(Info,Info, _Term) ->
+ ok;
+error_notify_new(_Info0,_Info1, Term) ->
+ logger_h_common:error_notify(Term).