Introduces native Erlang query servers. Closes COUCHDB-377

Thanks Mark Hammond and Paul Davis for doing most of the work, and Michael McDaniel for the inspiration.

There is still room for improvement on the APIs exposed to the Erlang views, as well as likely a whole lot of work to be done to increase parallelism. But the important part now is that we have native Erlang views.


git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@803685 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 43 insertions, 0 deletions

diff --git a/test/run_native_process.es b/test/run_native_process.es
new file mode 100644
index 00000000..275d2bbe
--- /dev/null
+++ b/test/run_native_process.es
@@ -0,0 +1,43 @@
+#! /usr/bin/env escript
+
+read() ->
+    case io:get_line('') of
+        eof -> stop;
+        Data -> mochijson2:decode(Data)
+    end.
+
+send(Data) when is_binary(Data) ->
+    send(binary_to_list(Data));
+send(Data) when is_list(Data) ->
+    io:format(Data ++ "\n", []).
+
+write(Data) ->
+    case (catch mochijson2:encode(Data)) of
+        {json_encode, Error} -> write({[{<<"error">>, Error}]});
+        Json -> send(Json)
+    end.
+
+%log(Mesg) ->
+%    log(Mesg, []).
+%log(Mesg, Params) ->
+%    io:format(standard_error, Mesg, Params).
+
+loop(Pid) ->
+    case read() of
+        stop -> ok;
+        Json ->
+            case (catch couch_native_process:prompt(Pid, Json)) of
+                {error, Reason} ->
+                    ok = write({[{error, Reason}]});
+                Resp ->
+                    ok = write(Resp),
+                    loop(Pid)
+            end
+    end.
+
+main([]) ->
+    code:add_pathz("src/couchdb"),
+    code:add_pathz("src/mochiweb"),
+    {ok, Pid} = couch_native_process:start_link(),
+    loop(Pid).
+