dongpu1908
dongpu1908
2016-10-30 23:07

如何在goLang中的整个应用程序中维护mongoDB会话作为全局变量

  • mangodb
已采纳

I am a beginner in GoLang. I want to maintain a MongoDB session throughout the application. I already have seen answers like binding DB session in martini framework or assigning it to a goLang structs. But i want a straight forward method.

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  • douluanzhao6689 douluanzhao6689 5年前

    I'm assuming you've already got the mgo driver:

    go get gopkg.in/mgo.v2

    In your code you can set a global variable outside your main function like:

    var mgoSession *mgo.Session

    Then either in an init function or right in your main function you start up your session:

    session, err := mgo.Dial("mongodb://localhost")
    if err != nil {
        panic(err)
    }
    session.SetMode(mgo.Monotonic, true)
    mgoSession = session
    

    Then you can clone the session as needed in the different functions in your program:

    session := mgoSession.Clone()
    defer session.Close()
    c := session.DB("databasename").C("collectionname")
    
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