Add src/machi_chain_bootstrap.erl

src/machi_chain_bootstrap.erl

@@ -0,0 +1,76 @@
+%% -------------------------------------------------------------------
+%%
+%% Copyright (c) 2007-2015 Basho Technologies, Inc.  All Rights Reserved.
+%%
+%% This file is provided to you 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(machi_chain_bootstrap).
+
+-behaviour(gen_server).
+
+%% API
+-export([start_link/0]).
+
+%% 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, {}).
+
+start_link() ->
+    gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
+
+init([]) ->
+    self() ! finish_init,
+    {ok, #state{}}.
+
+handle_call(_Request, _From, State) ->
+    Reply = ok,
+    {reply, Reply, State}.
+
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+handle_info(finish_init, State) ->
+    FLUs = get_local_flu_names(),
+    FLU_Epochs = get_latest_public_epochs(FLUs),
+    FLUs_at_zero = [FLU || {FLU, 0} <- FLU_Epochs],
+    lager:info("FLUs at epoch 0: ~p\n", [FLUs_at_zero]),
+    {noreply, State};
+handle_info(_Info, State) ->
+    {noreply, State}.
+
+terminate(_Reason, _State) ->
+    ok.
+
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+%%%%%
+
+get_local_flu_names() ->
+    [Name || {Name,_,_,_} <- supervisor:which_children(machi_flu_sup)].
+
+get_latest_public_epochs(FLUs) ->
+    [begin
+         PS = machi_flu1:make_projection_server_regname(FLU),
+         {ok, {Epoch, _CSum}} = machi_projection_store:get_latest_epochid(
+                                  PS, public),
+         {FLU, Epoch}
+     end || FLU <- FLUs].