golang - 自定义全局 parameter

逃离我推掉我的手 2022-03-29 02:41 256阅读 0赞

# 目的 #

1. 创建 struct 用于定义参数变量
    2. 参数变量复制方法
    3. 全局调用参数变量方法

# 结构 #

[root@ns-yun-020049 go]# tree src
    src                                <- 源码目录
    ├── client                         <- 程序目录
    │   └── showparam.go
    ├── main.go                        <- 入口文件
    ├── models                         <- struct 结构定义
    │   └── serverstruct.go
    └── param                          <- 初始化参数定义位置
        └── init.go

# 程序说明 #

1. param/init.go          引用了 models.serverstruct.go struct 用于定义参数, 并根据需要进行赋值
    2. client/showparam.go    在程序中使用自定义参数
    3. main.go                在入口文件中使用自定义参数

# 程序参考 #

cat models/serverstruct.go

package models
    
    type Server struct {
        Network []string
        Url string
        Version string
    }

cat param/init.go

package param
    
    import (
       "models"
    )
    
    var (
       nsnetwork = []string{"bond0.208", "bond1"}
       shnetwork = []string{"bond0"}
       shurl = "http://shurl/"
       nsurl = "http://nsurl/"
    )
    
    func LocalParmeter(hostName string ) (privParam models.Server)  {
    
        if hostName == "myhostname" {
             privParam.Url = shurl
             privParam.Network = shnetwork
             privParam.Version = "old"
        }else {
             privParam.Url = nsurl
             privParam.Network = nsnetwork
             privParam.Version = "new"
        }
        return
    }

cat client/showparam.go

package client
    
    import (
       "param"
       "os"
       "fmt"
       "reflect"
    )
    
    func Mtest()(){
    
        hostName, _ := os.Hostname()
        my := param.LocalParmeter(hostName)
    
        fmt.Println("==== from client package ===")
        fmt.Println(reflect.TypeOf(my))
        fmt.Println("=============")
        fmt.Println(my.Network)
        fmt.Println("==== end client package ===")
    
        return
    }

cat main.go

package main
    
    import (
      "fmt"
      "client"
      "param"
      "os"
    )
    
    
    func main(){
       hostName, _ := os.Hostname()
       client.Mtest()
       a := param.LocalParmeter(hostName)
       fmt.Println("==== from main ===")
       fmt.Println(a)
       fmt.Println("==== end main ===")
    }

# 参考运行结果 #

go run main.go

==== from client package ===
    models.Server
    =============
    [bond0.208 bond1]
    ==== end client package ===
    ==== from main ===
    {[bond0.208 bond1] http://nsurl/ new}
    ==== end main ===