First cut at _changes api. Update the by_id and by_seq indexes to contain update seq numbers and pointers to bodies on disk, for use in the _changes api. This is a new file version, but the code can continue to serve the old 0.9 version without problems, though certain features in the _changes api will not be able to work. Upgrade to new file version (from 1 to 2) by compacting the file. Also fixed bugs with how the stats api tracks open databases.

git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@772406 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 15 insertions, 0 deletions

diff --git a/src/couchdb/couch_stats_collector.erl b/src/couchdb/couch_stats_collector.erl
index 854fffb0..ad5e9e9a 100644
--- a/src/couchdb/couch_stats_collector.erl
+++ b/src/couchdb/couch_stats_collector.erl
@@ -24,6 +24,7 @@
 
 -export([start/0, stop/0, get/1, 
         increment/1, decrement/1,
+        track_process_count/1,
         record/2, clear/1,
         all/0, all/1]).
 
@@ -87,6 +88,20 @@ all(Type) ->
     end.
 
 
+track_process_count(Stat) ->
+    case (catch couch_stats_collector:increment(Stat)) of
+    ok ->
+        Self = self(),
+        spawn(
+            fun() ->
+                erlang:monitor(process, Self),
+                receive {'DOWN', _, _, _, _} -> ok end,
+                couch_stats_collector:decrement(Stat)
+            end);
+     _ -> ok
+    end.
+
+
 % GEN_SERVER