opencensus

%%%------------------------------------------------------------------------
%% Copyright 2017, OpenCensus Authors
%% 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.
%%
%% @doc A sampler that always returns false.
%% @end
%%%-----------------------------------------------------------------------
-module(oc_sampler_never).

-behaviour(oc_sampler).

-export([init/1,
         should_sample/4]).

init(_) ->
    ok.

should_sample(_, _, _, _) ->
    false.