I have two packages named client and worker. I want to share same ssdb, mysql and redis connection with both the packages. One more similar problem that i am facing to share auth between these two packages.
app
-> client pkg
-> worker pkg
main.go (contains auth as global variable)
Can anyone please suggest me the best way to implement these two things ?
分享 There's lots of ways to do this and each approach has pros and cons and it really depends on what you are doing. One easy way to do this is to have a third package with the DB connection and import it from the other two packages and from the main package.
app
-> client pkg // import "app/global"
-> worker pkg // import "app/global"
-> global pkg // Contains ssdb and auth as global variables
main.go
Another approach that might be better depending on what you are doing is to have the functions on the client and worker packages accept a db connection as a parameter and from main.go initialize the db and pass it as a parameter when you call a function that needs it.
It depends on what you are doing but for big projects it's easier to maintain if you just have one package doing all your db operations and you access it from all the places you need to do something. That way you don't have to worry about this issue because only one package has to worry about the db connection even if several packages use it.
Edit:
The problem with global variables is that they can be modified at the same time from everywhere in your project and it can introduce race conditions, but there is nothing wrong in using them when this is not an issue.
In this case, you are just setting the value once, when you connect to the DB and then just use the object.
You mentioned you want to have another package for the auth, I recommend just having one package and having in it everything you need to access from more than one package, in this case ssdb and auth.
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