| %%% |
| %%% 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_histogram_ets.erl |
| %%% @author joe williams <j@boundary.com> |
| %%% @doc |
| %%% this module creates ets tables for histograms as to be the parent |
| %%% process for those histograms so the apps using folsom dont have to |
| %%% @end |
| %%%------------------------------------------------------------------ |
| |
| -module(folsom_metrics_histogram_ets). |
| |
| -behaviour(gen_server). |
| |
| %% API |
| -export([start_link/0, new/2]). |
| |
| %% gen_server callbacks |
| -export([init/1, handle_call/3, handle_cast/2, handle_info/2, |
| terminate/2, code_change/3]). |
| |
| -define(SERVER, ?MODULE). |
| |
| -record(state, {}). |
| |
| %%%=================================================================== |
| %%% API |
| %%%=================================================================== |
| |
| %%-------------------------------------------------------------------- |
| %% @doc |
| %% Starts the server |
| %% |
| %% @spec start_link() -> {ok, Pid} | ignore | {error, Error} |
| %% @end |
| %%-------------------------------------------------------------------- |
| start_link() -> |
| gen_server:start_link({local, ?SERVER}, ?MODULE, [], []). |
| |
| %%%=================================================================== |
| %%% gen_server callbacks |
| %%%=================================================================== |
| |
| %%-------------------------------------------------------------------- |
| %% @private |
| %% @doc |
| %% Initializes the server |
| %% |
| %% @spec init(Args) -> {ok, State} | |
| %% {ok, State, Timeout} | |
| %% ignore | |
| %% {stop, Reason} |
| %% @end |
| %%-------------------------------------------------------------------- |
| init([]) -> |
| {ok, #state{}}. |
| |
| %%-------------------------------------------------------------------- |
| %% @private |
| %% @doc |
| %% Handling call messages |
| %% |
| %% @spec handle_call(Request, From, State) -> |
| %% {reply, Reply, State} | |
| %% {reply, Reply, State, Timeout} | |
| %% {noreply, State} | |
| %% {noreply, State, Timeout} | |
| %% {stop, Reason, Reply, State} | |
| %% {stop, Reason, State} |
| %% @end |
| %%-------------------------------------------------------------------- |
| handle_call({new, {Table, Opts}}, _From, State) -> |
| Reply = ets:new(Table, Opts), |
| {reply, Reply, State}. |
| |
| %%-------------------------------------------------------------------- |
| %% @private |
| %% @doc |
| %% Handling cast messages |
| %% |
| %% @spec handle_cast(Msg, State) -> {noreply, State} | |
| %% {noreply, State, Timeout} | |
| %% {stop, Reason, State} |
| %% @end |
| %%-------------------------------------------------------------------- |
| handle_cast(_Msg, State) -> |
| {noreply, State}. |
| |
| %%-------------------------------------------------------------------- |
| %% @private |
| %% @doc |
| %% Handling all non call/cast messages |
| %% |
| %% @spec handle_info(Info, State) -> {noreply, State} | |
| %% {noreply, State, Timeout} | |
| %% {stop, Reason, State} |
| %% @end |
| %%-------------------------------------------------------------------- |
| handle_info(_Info, State) -> |
| {noreply, State}. |
| |
| %%-------------------------------------------------------------------- |
| %% @private |
| %% @doc |
| %% This function is called by a gen_server when it is about to |
| %% terminate. It should be the opposite of Module:init/1 and do any |
| %% necessary cleaning up. When it returns, the gen_server terminates |
| %% with Reason. The return value is ignored. |
| %% |
| %% @spec terminate(Reason, State) -> void() |
| %% @end |
| %%-------------------------------------------------------------------- |
| terminate(_Reason, _State) -> |
| ok. |
| |
| %%-------------------------------------------------------------------- |
| %% @private |
| %% @doc |
| %% Convert process state when code is changed |
| %% |
| %% @spec code_change(OldVsn, State, Extra) -> {ok, NewState} |
| %% @end |
| %%-------------------------------------------------------------------- |
| code_change(_OldVsn, State, _Extra) -> |
| {ok, State}. |
| |
| %%%=================================================================== |
| %%% Internal functions |
| %%%=================================================================== |
| |
| new(Table, Opts) -> |
| gen_server:call(?SERVER, {new, {Table, Opts}}). |