introduce socket.channel, and rewrite redis/mongo driver

service/testredis.lua

@@ -3,34 +3,32 @@ local redis = require "redis"
 
 skynet.start(function()
 	local db = redis.connect "main"
-	print(db:select(0))
-	db:batch "write"	-- ignore results
-		db:del "C"
-		db:set("A", "hello")
-		db:set("B", "world")
-		db:sadd("C", "one")
-	print(db:batch "end")
+	db:del "C"
+	db:set("A", "hello")
+	db:set("B", "world")
+	db:sadd("C", "one")
 
-	db:batch "read"
-		db:get("A")
-		db:get("B")
-	local r = db:batch "end" -- return all results in a table
-	for k,v in pairs(r) do
-		print(k,v)
-	end
+	print(db:get("A"))
+	print(db:get("B"))
 
-	db:batch "write"
 	db:del "D"
 	for i=1,1000 do
 		db:hset("D",i,i)
 	end
-	db:batch "end"
 	local r = db:hvals "D"
 	for k,v in pairs(r) do
 		print(k,v)
 	end
 
-
+--[[
+	db:multi()
+	db:get "A"
+	db:get "B"
+	local t = db:exec()
+	for k,v in ipairs(t) do
+		print("Exec", v)
+	end
+]]
 	print(db:exists "A")
 	print(db:get "A")
 	print(db:set("A","hello world"))