How to use ctx.Extra?

[Icedroid]

extra can store extra data generated/used by hook functions, e.g. 'BeforeServe'. ?
can I use like follow:

type request struct {
    reqStartTime time.Time
    requestId string
    reqData map[string]interface {}
}
func BeforeServeV1(ctx *jas.Context) {
    var req request
    req.reqStartTime = time.Now()
    req.requestId = GenUUID()
    d, err := ctx.FindString("d")
    req.reqData,err  = json.Unmarshal([]byte(d))

   ctx.Extra = req
}

reqData will be used in other router method. is it concurrent written safe?

[Evan Zhou]

Every request has its own ctx, so it will not be concurrently accessed by multiple goroutine.

[Icedroid]

ctx.Extra will point to one request address? I used ctx.Extra.reqData no problem?

[Evan Zhou]

no problem.

[Icedroid]

If I used like these, reqData will only be init once? Every request will write reqData, It is not safe.

var (
  reqStartTime time.Time
  requestId string
  reqData map[string]interface {}
)
func BeforeServeV1(ctx *jas.Context) {
    reqStartTime = time.Now()
    requestId = GenUUID()
    d, err := ctx.FindString("d")
    reqData,err  = json.Unmarshal([]byte(d))

}

[Evan Zhou]

Don't use it like that.

[Icedroid]

If I want transfer a variable to the Create router method, I only can use ctx.Extra? Thank for your Good attention!

type Create struct{}

func (*Create) Post(ctx *jas.Context) {
    ctx.Data = false
    req := ctx.Extra.(request) //need assert....
}

[Evan Zhou]

Yes.

On Thu, Mar 27, 2014 at 3:04 PM, Icecream [e-mail] wrote:

If I want transfer a variable to the Create router method, I only can use
ctx.Extra? Thank for your Good intention!

type Create struct{}

func (*Create) Post(ctx *jas.Context) {
ctx.Data = false
req := ctx.Extra.(request) //need assert....
}

Reply to this email directly or view it on GitHubhttps://github.com//issues/14#issuecomment-38774374
.

[Icedroid]

Thank you and your attention! Now I work an mobile api on jas. Maybe need more your help.Than you very much!

[Evan Zhou]

I think you mean 'attention', you are welcome.