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-module(mem3_httpd).
-export([handle_membership_req/1]).
%% includes
-include("mem3.hrl").
-include_lib("couch/include/couch_db.hrl").
handle_membership_req(#httpd{method='GET',
path_parts=[<<"_membership">>]} = Req) ->
ClusterNodes = try mem3:nodes()
catch _:_ -> {ok,[]} end,
couch_httpd:send_json(Req, {[
{all_nodes, lists:sort([node()|nodes()])},
{cluster_nodes, lists:sort(ClusterNodes)}
]});
handle_membership_req(#httpd{method='GET',
path_parts=[<<"_membership">>, <<"parts">>, DbName]} = Req) ->
ClusterNodes = try mem3:nodes()
catch _:_ -> {ok,[]} end,
Shards = mem3:shards(DbName),
JsonShards = json_shards(Shards, dict:new()),
couch_httpd:send_json(Req, {[
{all_nodes, lists:sort([node()|nodes()])},
{cluster_nodes, lists:sort(ClusterNodes)},
{partitions, JsonShards}
]}).
%%
%% internal
%%
json_shards([], AccIn) ->
List = dict:to_list(AccIn),
{lists:sort(List)};
json_shards([#shard{node=Node, range=[B,_E]} | Rest], AccIn) ->
HexBeg = couch_util:to_hex(<<B:32/integer>>),
json_shards(Rest, dict:append(HexBeg, Node, AccIn)).
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