// Begin a transaction.
func (p DbPlugin) BeforeRequest(c *revel.Controller) {
txn, err := Db.Begin()
if err != nil {
panic(err)
}
c.Txn = txn
}
// Commit the active transaction.
func (p DbPlugin) AfterRequest(c *revel.Controller) {
if err := c.Txn.Commit(); err != nil {
if err != sql.ErrTxDone {
panic(err)
}
}
c.Txn = nil
}
func SessionFilter(c *revel.Controller, fc []revel.Filter) {
sessionId := c.Session.Id()
// 从memcache中得到cache, 赋给session
cache := revel.Session(memcache.Get(sessionId))
if cache == nil {
cache = revel.Session{}
cache.Id()
}
c.Session = cache
fc[0](c, fc[1:])
// 再把session保存之
memcache.Set(sessionId, c.Session, -1)
// 只留下sessionId
c.Session = revel.Session{revel.SESSION_ID_KEY: sessionId}
}
func BusinessPanicFilter(c *revel.Controller, fc []revel.Filter) {
defer func() {
if x := recover(); x != nil {
if reflect.TypeOf(x).Name() == "BusinessError" {
err := x.(BusinessError)
c.Response.ContentType = "application/json; charset=utf-8"
c.Result = c.RenderJson(map[string]interface{}{
"success": false,
"code": err.Code,
"message": err.Error(),
})
} else {
if revel.Config.StringDefault("mode.dev", "true") != "true" {
log.Print(x, "\n", string(debug.Stack()))
}
panic(x)
}
}
}()
fc[0](c, fc[1:])
}
// This function handles a panic in a json API action invocation.
// It cleans up the stack trace, logs it, and responds with an error json message.
func handleInvocationPanicJson(c *revel.Controller, err interface{}) {
// User Initiated panic with error response doesn't need to print the whole stack trace.
if errResponse, ok := err.(*JsonErrorResponder); ok {
c.Result = JsonErrorResult{errResponse}
} else if errResponse, ok := err.(JsonErrorResponder); ok {
c.Result = JsonErrorResult{&errResponse}
} else {
// System initiated panic. Use a JSON error response as we shouldn't
// be returning HTML for a JSON defined API.
error := revel.NewErrorFromPanic(err)
revel.ERROR.Print(err, "\n", error.Stack)
if error == nil {
revel.ERROR.Print(err, "\n", string(debug.Stack()))
} else {
revel.ERROR.Print(err, "\n", error.Stack)
}
var JsonErrorResponder = PanicResponseFactory(err)
c.Result = JsonErrorResult{&JsonErrorResponder}
}
}