1 files changed, 32 insertions, 0 deletions
diff --git a/apps/fabric/src/fabric_db_doc_count.erl b/apps/fabric/src/fabric_db_doc_count.erl
new file mode 100644
index 00000000..12d5cbf8
--- /dev/null
+++ b/apps/fabric/src/fabric_db_doc_count.erl
@@ -0,0 +1,32 @@
+-module(fabric_db_doc_count).
+
+-export([go/1]).
+
+-include("fabric.hrl").
+-include_lib("mem3/include/mem3.hrl").
+-include_lib("couch/include/couch_db.hrl").
+
+go(DbName) ->
+    Shards = mem3:shards(DbName),
+    Workers = fabric_util:submit_jobs(Shards, get_doc_count, []),
+    Acc0 = {fabric_dict:init(Workers, nil), 0},
+    fabric_util:recv(Workers, #shard.ref, fun handle_message/3, Acc0).
+
+handle_message({ok, Count}, Shard, {Counters, Acc}) ->
+    case fabric_dict:lookup_element(Shard, Counters) of
+    undefined ->
+        % already heard from someone else in this range
+        {ok, {Counters, Acc}};
+    nil ->
+        C1 = fabric_dict:store(Shard, ok, Counters),
+        C2 = fabric_view:remove_overlapping_shards(Shard, C1),
+        case fabric_dict:any(nil, C2) of
+        true ->
+            {ok, {C2, Count+Acc}};
+        false ->
+            {stop, Count+Acc}
+        end
+    end;
+handle_message(_, _, Acc) ->
+    {ok, Acc}.
+