TODO fix: wedge self

src/machi_flu1.erl

@@ -85,7 +85,7 @@
 -define(SERVER_CMD_READ_TIMEOUT, 600*1000).
 
 -export([start_link/1, stop/1,
-         update_wedge_state/3]).
+         update_wedge_state/3, wedge_myself/2]).
 -export([make_listener_regname/1, make_projection_server_regname/1]).
 -export([encode_csum_file_entry/3, encode_csum_file_entry_bin/3,
          decode_csum_file_entry/1,
@@ -128,6 +128,10 @@ update_wedge_state(PidSpec, Boolean, EpochId)
   when (Boolean == true orelse Boolean == false), is_tuple(EpochId) ->
     PidSpec ! {wedge_state_change, Boolean, EpochId}.
 
+wedge_myself(PidSpec, EpochId)
+  when is_tuple(EpochId) ->
+    PidSpec ! {wedge_myself, EpochId}.
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 ets_table_name(FluName) when is_atom(FluName) ->
@@ -246,7 +250,8 @@ listen_server_loop(LSock, S) ->
     spawn_link(fun() -> net_server_loop(Sock, S) end),
     listen_server_loop(LSock, S).
 
-append_server_loop(FluPid, #state{data_dir=DataDir,wedged=Wedged_p}=S) ->
+append_server_loop(FluPid, #state{data_dir=DataDir,wedged=Wedged_p,
+                                  epoch_id=OldEpochId}=S) ->
     AppendServerPid = self(),
     receive
         {seq_append, From, _Prefix, _Chunk, _CSum, _Extra} when Wedged_p ->
@@ -257,10 +262,26 @@ append_server_loop(FluPid, #state{data_dir=DataDir,wedged=Wedged_p}=S) ->
                                                  Chunk, CSum, Extra,
                                                  DataDir, AppendServerPid) end),
             append_server_loop(FluPid, S);
-        {wedge_state_change, Boolean, EpochId} ->
-            true = ets:insert(S#state.etstab, {epoch, {Boolean, EpochId}}),
-            append_server_loop(FluPid, S#state{wedged=Boolean,
-                                               epoch_id=EpochId});
+        {wedge_myself, WedgeEpochId} ->
+            if WedgeEpochId == OldEpochId ->
+                    true = ets:insert(S#state.etstab,
+                                      {epoch, {true, OldEpochId}}),
+                    append_server_loop(FluPid, S#state{wedged=true});
+               true ->
+                    append_server_loop(FluPid, S)
+            end;
+        {wedge_state_change, Boolean, {NewEpoch, _}=NewEpochId} ->
+            OldEpoch = case OldEpochId of {OldE, _} -> OldE;
+                                          undefined -> -1
+                       end,
+            if NewEpoch >= OldEpoch ->
+                    true = ets:insert(S#state.etstab,
+                                      {epoch, {Boolean, NewEpochId}}),
+                    append_server_loop(FluPid, S#state{wedged=Boolean,
+                                                       epoch_id=NewEpochId});
+               true ->
+                    append_server_loop(FluPid, S)
+            end;
         {wedge_status, FromPid} ->
             #state{wedged=Wedged_p, epoch_id=EpochId} = S,
             FromPid ! {wedge_status_reply, Wedged_p, EpochId},
@@ -350,8 +371,9 @@ do_pb_ll_request2(EpochID, CMD, S) ->
                true ->
                     %% We're at same epoch # but different checksum, or
                     %% we're at a newer/bigger epoch #.
-                    io:format(user, "\n\nTODO: wedge myself!\n\n", []),
-                    todo_wedge_myself
+                    io:format(user, "\n\nTODO/monitor: wedging myself!\n\n",[]),
+                    wedge_myself(S#state.flu_name, CurrentEpochID),
+                    ok
             end,
             {{error, bad_epoch}, S};
        true ->