add skynet.service

lualib/skynet/service.lua

@@ -0,0 +1,43 @@
+local skynet = require "skynet"
+
+local service = {}
+local cache = {}
+local provider
+
+local function get_provider()
+	provider = provider or skynet.uniqueservice "service_provider"
+	return provider
+end
+
+local function check(func)
+	local info = debug.getinfo(func, "u")
+	assert(info.nups == 1)
+	assert(debug.getupvalue(func,1) == "_ENV")
+end
+
+function service.new(name, mainfunc, ...)
+	local p = get_provider()
+	local addr, booting = skynet.call(p, "lua", "test", name)
+	if addr then
+		service.address = addr
+	else
+		if booting then
+			service.address = skynet.call(p, "lua", "query", name)
+		else
+			check(mainfunc)
+			local code = string.dump(mainfunc)
+			service.address = skynet.call(p, "lua", "launch", name, code, ...)
+		end
+	end
+	cache[name] = service.address
+	return service.address
+end
+
+function service.query(name)
+	if not cache[name] then
+		cache[name] = skynet.call(get_provider(), "lua", "query", name)
+	end
+	return cache[name]
+end
+
+return service