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folsom_metrics.erl
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folsom_metrics.erl
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%%%
%%% Copyright 2011, Boundary
%%%
%%% 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.
%%%
%%%-------------------------------------------------------------------
%%% File: folsom_metrics.erl
%%% @author joe williams <j@boundary.com>
%%% @doc
%%% @end
%%%------------------------------------------------------------------
-module(folsom_metrics).
-export([
new_counter/1,
new_gauge/1,
new_histogram/1,
new_histogram/2,
new_histogram/3,
new_histogram/4,
new_history/1,
new_history/2,
new_meter/1,
new_meter_reader/1,
new_duration/1,
new_duration/2,
new_duration/3,
new_duration/4,
new_spiral/1,
new_spiral/2,
delete_metric/1,
tag_metric/2,
untag_metric/2,
notify/1,
notify/2,
notify/3,
notify/4,
safely_notify/1,
safely_notify/2,
safely_notify/3,
safely_notify/4,
notify_existing_metric/3,
get_metrics/0,
metric_exists/1,
get_metrics_info/0,
get_metrics_value/1,
get_metrics_value/2,
get_metric_info/1,
get_metric_value/1,
get_histogram_statistics/1,
get_histogram_statistics/2,
get_history_values/2,
get_tags/1,
histogram_timed_update/2,
histogram_timed_update/3,
histogram_timed_update/4,
histogram_timed_begin/1,
histogram_timed_notify/1,
safely_histogram_timed_update/2,
safely_histogram_timed_update/3,
safely_histogram_timed_update/4,
safely_histogram_timed_notify/1
]).
-include("folsom.hrl").
%% Metrics API
new_counter(Name) ->
folsom_ets:add_handler(counter, Name).
new_gauge(Name) ->
folsom_ets:add_handler(gauge, Name).
new_histogram(Name) ->
folsom_metrics:new_histogram(Name, ?DEFAULT_SAMPLE_TYPE, ?DEFAULT_SIZE, ?DEFAULT_ALPHA).
new_histogram(Name, slide_uniform) ->
folsom_metrics:new_histogram(Name, slide_uniform, {?DEFAULT_SLIDING_WINDOW, ?DEFAULT_SIZE}, ?DEFAULT_ALPHA);
new_histogram(Name, SampleType) ->
folsom_metrics:new_histogram(Name, SampleType, ?DEFAULT_SIZE, ?DEFAULT_ALPHA).
new_histogram(Name, SampleType, SampleSize) ->
folsom_metrics:new_histogram(Name, SampleType, SampleSize, ?DEFAULT_ALPHA).
new_histogram(Name, SampleType, SampleSize, Alpha) ->
folsom_ets:add_handler(histogram, Name, SampleType, SampleSize, Alpha).
new_history(Name) ->
folsom_metrics:new_history(Name, ?DEFAULT_SIZE).
new_history(Name, SampleSize) ->
folsom_ets:add_handler(history, Name, SampleSize).
new_meter(Name) ->
folsom_ets:add_handler(meter, Name).
new_meter_reader(Name) ->
folsom_ets:add_handler(meter_reader, Name).
new_duration(Name) ->
folsom_metrics:new_duration(Name, ?DEFAULT_SAMPLE_TYPE, ?DEFAULT_SIZE, ?DEFAULT_ALPHA).
new_duration(Name, SampleType) ->
folsom_metrics:new_duration(Name, SampleType, ?DEFAULT_SIZE, ?DEFAULT_ALPHA).
new_duration(Name, SampleType, SampleSize) ->
folsom_metrics:new_duration(Name, SampleType, SampleSize, ?DEFAULT_ALPHA).
new_duration(Name, SampleType, SampleSize, Alpha) ->
folsom_ets:add_handler(duration, Name, SampleType, SampleSize, Alpha).
new_spiral(Name) ->
folsom_ets:add_handler(spiral, Name).
new_spiral(Name, Update) ->
folsom_ets:add_handler(spiral, Name, Update).
tag_metric(Name, Tag) ->
folsom_ets:tag_handler(Name, Tag).
untag_metric(Name, Tag) ->
folsom_ets:untag_handler(Name, Tag).
delete_metric(Name) ->
folsom_ets:delete_handler(Name).
notify(Event) ->
folsom_ets:notify(Event).
notify(Name, Event) ->
folsom_ets:notify(Name, Event).
notify(Name, Event, Type) ->
folsom_ets:notify(Name, Event, Type).
notify(Name, Event, Type, Tags) ->
folsom_ets:tagged_notify(Name, Event, Type, Tags).
safely_notify(Event) ->
catch notify(Event).
safely_notify(Name, Event) ->
catch notify(Name, Event).
safely_notify(Name, Event, Type) ->
catch notify(Name, Event, Type).
safely_notify(Name, Event, Type, Tags) ->
catch notify(Name, Event, Type, Tags).
notify_existing_metric(Name, Event, Type) ->
folsom_ets:notify_existing_metric(Name, Event, Type).
get_metrics() ->
folsom_ets:get_handlers().
metric_exists(Name) ->
folsom_ets:handler_exists(Name).
get_metrics_info() ->
folsom_ets:get_handlers_info().
get_metrics_value(Tag) ->
folsom_ets:get_group_values(Tag).
get_metrics_value(Tag, Type) ->
folsom_ets:get_group_values(Tag, Type).
get_metric_info(Name) ->
[folsom_ets:get_info(Name)].
get_metric_value(Name) ->
folsom_ets:get_values(Name).
get_histogram_statistics(Name) ->
Values = folsom_ets:get_values(Name),
WantedMetrics = application:get_env(folsom, enabled_metrics, ?DEFAULT_METRICS),
bear:get_statistics_subset(Values, WantedMetrics).
get_histogram_statistics(Name1, Name2) ->
Values1 = get_metric_value(Name1),
Values2 = get_metric_value(Name2),
bear:get_statistics(Values1, Values2).
get_history_values(Name, Count) ->
folsom_ets:get_history_values(Name, Count).
get_tags(Name) ->
folsom_ets:get_tags(Name).
histogram_timed_update(Name, Fun) ->
{Time, Value} = timer:tc(Fun),
ok = notify({Name, Time}),
Value.
histogram_timed_update(Name, Fun, Args) ->
{Time, Value} = timer:tc(Fun, Args),
ok = notify({Name, Time}),
Value.
histogram_timed_update(Name, Mod, Fun, Args) ->
{Time, Value} = timer:tc(Mod, Fun, Args),
ok = notify({Name, Time}),
Value.
histogram_timed_begin(Name) ->
{Name, os:timestamp()}.
histogram_timed_notify({Name, Begin}) ->
Now = os:timestamp(),
Time = timer:now_diff(Now, Begin),
ok = notify({Name, Time}).
safely_histogram_timed_update(Name, Fun) ->
{Time, Value} = timer:tc(Fun),
_ = safely_notify({Name, Time}),
Value.
safely_histogram_timed_update(Name, Fun, Args) ->
{Time, Value} = timer:tc(Fun, Args),
_ = safely_notify({Name, Time}),
Value.
safely_histogram_timed_update(Name, Mod, Fun, Args) ->
{Time, Value} = timer:tc(Mod, Fun, Args),
_ = safely_notify({Name, Time}),
Value.
safely_histogram_timed_notify({Name, Begin}) ->
Now = os:timestamp(),
Time = timer:now_diff(Now, Begin),
safely_notify({Name, Time}).