global variable in init_by_lua_file or require in every script

ovoshlook · 2017-04-22T21:10:10+00:00

Hi folks, Long time no releases. We've been very busy setting up the OpenResty Inc. commercial company in the US. That's why we've been quiet in the last fe...

global variable in init_by_lua_file or require in every script

ovoshlook

Hi. I implementing some conde for now and thinking how is better to initialize libs

I always did

local this= require "that"
in every script but always thinking about require-one-time operations

I thought about use some golbal table for describe required libs like

modules = {
this =require "that"
}

I tried it. IT works fine

But also i read about that it is not good to use global vars in openresty.

So my question is how to do better and if need to avoid global variables in this case - why?

THank you for response

qleex001

You need not consider about it.

require method have it's own cache.

You can see the official document https://www.lua.org/manual/5.1/manual.html#pdf-require

在 2017年4月22日星期六 UTC+8下午9:10:10，Yuriy Gorlichenko写道：

Hi. I implementing some conde for now and thinking how is better to initialize libs

I always did

local this= require "that"
in every script but always thinking about require-one-time operations

I thought about use some golbal table for describe required libs like

modules = {
this =require "that"
}

I tried it. IT works fine

But also i read about that it is not good to use global vars in openresty.

So my question is how to do better and if need to avoid global variables in this case - why?

THank you for response

ovoshlook

Yes. I uderstand this goal. I mean some another point
In case of require in avery file i need to do it every time
In init i can do require at once and then use these functions in every client connect.

The root of question is: is it bad practice and if yes i want to understand why.

суббота, 22 апреля 2017 г., 16:10:10 UTC+3 пользователь Yuriy Gorlichenko написал:

Hi. I implementing some conde for now and thinking how is better to initialize libs

I always did

local this= require "that"
in every script but always thinking about require-one-time operations

I thought about use some golbal table for describe required libs like

modules = {
this =require "that"
}

I tried it. IT works fine

But also i read about that it is not good to use global vars in openresty.

So my question is how to do better and if need to avoid global variables in this case - why?

THank you for response