update

CHANGELOG.md

@@ -1,6 +1,34 @@
+# v0.2
+- add mongodb driver
+- improve message dispatch
+
+ ```lua
+    ---old style
+    local function docmd(sender,sessionid, CMD,...)
+
+    end
+
+    moon.dispatch('lua',function(msg,unpack)
+        local sender, sz, len = moon.decode(msg, "SC")
+        docmd(sender, unpack(sz, len))
+    end)
+
+
+    ---new style
+    moon.dispatch('lua',function(sender,session, cmd, ...)
+        -- body
+        local f = command[cmd]
+        if f then
+            f(sender,...)
+        else
+            error(string.format("Unknown command %s", tostring(cmd)))
+        end
+    end)
+ ```
+
 # v0.1 (2021-11-17)
 - remove socket.readline. use: socket.read
 - bugfix: buffer's move assignment operator
-- message object passed by value in cpp code
+- message object passed by right value in cpp code
 - use isocalendar calculate datetime
 - improve code