Files
fx-serverless/context/context.go
Minghe c0009b1b64 request a port when not port given (#379)
* request a port when not port given
* make context an interface, for easy testing (#380)
2019-12-03 15:14:13 +08:00

77 lines
1.4 KiB
Go

package context
import (
"context"
"github.com/urfave/cli"
)
type key string
const (
keyCliCtx = key("cmd_cli")
)
// Contexter ctx interface
type Contexter interface {
Get(k string) interface{}
Set(k string, v interface{})
Use(fn func(ctx *Context) error) error
GetContext() context.Context
GetCliContext() *cli.Context
}
// Context fx context
type Context struct {
context.Context
}
// NewContext new a context
func NewContext() *Context {
ctx := context.Background()
return &Context{ctx}
}
// FromCliContext create context from cli.Context
func FromCliContext(c *cli.Context) *Context {
ctx := NewContext()
ctx.WithCliContext(c)
return ctx
}
// WithCliContext set cli.Context
func (ctx *Context) WithCliContext(c *cli.Context) {
newCtx := context.WithValue(ctx.Context, keyCliCtx, c)
ctx.Context = newCtx
}
// GetCliContext get cli.Context
func (ctx *Context) GetCliContext() *cli.Context {
return ctx.Value(keyCliCtx).(*cli.Context)
}
// Set a value with name
func (ctx *Context) Set(name string, value interface{}) {
newCtx := context.WithValue(ctx.Context, name, value)
ctx.Context = newCtx
}
// Get a value
func (ctx *Context) Get(name string) interface{} {
return ctx.Context.Value(name)
}
// Use invole a middle
func (ctx *Context) Use(fn func(ctx *Context) error) error {
return fn(ctx)
}
// GetContext get context
func (ctx *Context) GetContext() context.Context {
return ctx.Context
}
var (
_ Contexter = &Context{}
)