/
event_stream.go
69 lines (58 loc) · 1.86 KB
/
event_stream.go
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package middleware
import (
"github.com/RedHatInsights/sources-api-go/model"
"github.com/RedHatInsights/sources-api-go/service"
"github.com/labstack/echo/v4"
)
// RaiseEvent calls the "RaiseEvent" function once the previous handler has succeeded. It grabs the resource and the
// event type from the context.
func RaiseEvent(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
// first call the handler function (or the next middlware)
err := next(c)
if err != nil {
return err
}
// specifically skip raising an event if this is set - usually when
// a create action happened but we do not want to re-raise the
// event.
if c.Get("skip_raise") != nil {
c.Logger().Infof("skipping raise event per skip_raise set on context")
return nil
}
// pull the "event" resource from the context, which needs to be set
// in the handler for this to work.
resource, ok := c.Get("resource").(model.Event)
if !ok {
c.Logger().Infof("failed to pull event resource from context - skipping raise event")
return nil
}
eventType, ok := c.Get("event_type").(string)
if !ok {
c.Logger().Warnf("Failed to cast event_type to string - exiting")
return nil
}
if c.Get("event_override") != nil {
event, ok := c.Get("event_override").(string)
if !ok {
c.Logger().Warnf("Failed to cast event_override from request - ditching post to kafka")
return nil
}
c.Logger().Infof("Using overridden event_type %v instead of %v", c.Get("event_override"), eventType)
eventType = event
}
c.Logger().Infof("Raising Event %v", eventType)
headers, err := service.ForwadableHeaders(c)
if err != nil {
return err
}
// async!
go func() {
err := service.RaiseEvent(eventType, resource, headers)
if err != nil {
c.Logger().Warnf("Error raising event %v: %v", eventType, err)
}
}()
return nil
}
}