/
receiver.go
167 lines (123 loc) · 3.58 KB
/
receiver.go
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package http
import (
"errors"
"log"
gohttp "net/http"
"sync"
"github.com/go-martini/martini"
"github.com/gogap/spirit"
)
var (
ErrHTTPReceiverAlreadyStarted = errors.New("http receiver already started")
)
var _ spirit.Receiver = new(HTTPReceiver)
type emptyWriter struct {
}
func (p *emptyWriter) Write(v []byte) (n int, err error) {
return
}
type HTTPReceiverConfig struct {
Address string `json:"address"`
DisableLogger bool `json:"disable_logger"`
}
type HTTPReceiver struct {
conf HTTPReceiverConfig
putter spirit.DeliveryPutter
translator spirit.InputTranslator
status spirit.Status
statusLocker sync.Mutex
marti *martini.ClassicMartini
requestHandler HTTPRequestHandlerFunc
}
func NewHTTPReceiver(conf HTTPReceiverConfig, requestHandler HTTPRequestHandlerFunc) (receiver *HTTPReceiver, err error) {
if conf.Address == "" {
conf.Address = ":8080"
}
receiver = &HTTPReceiver{
conf: conf,
marti: martini.Classic(),
requestHandler: requestHandler,
}
return
}
func (p *HTTPReceiver) SetDeliveryPutter(putter spirit.DeliveryPutter) (err error) {
p.putter = putter
return
}
func (p *HTTPReceiver) Start() (err error) {
p.statusLocker.Lock()
defer p.statusLocker.Unlock()
spirit.Logger().WithField("actor", spirit.ActorReceiver).
WithField("urn", "urn:spirit-contrib:receiver:http[base]").
WithField("event", "start").
Debugln("enter start")
if p.status == spirit.StatusRunning {
err = ErrHTTPReceiverAlreadyStarted
return
}
go p.serve()
p.status = spirit.StatusRunning
spirit.Logger().WithField("actor", spirit.ActorReceiver).
WithField("urn", "urn:spirit-contrib:receiver:http[base]").
WithField("event", "start").
Infoln("started")
return
}
func (p *HTTPReceiver) Handler(res gohttp.ResponseWriter, req *gohttp.Request) {
var deliveries []spirit.Delivery
var err error
deliveryChan := make(chan spirit.Delivery)
doneChan := make(chan bool)
defer close(deliveryChan)
defer close(doneChan)
if deliveries, err = p.requestHandler(res, req, deliveryChan, doneChan); err != nil {
spirit.Logger().WithField("actor", spirit.ActorReceiver).
WithField("event", "call http request handler").
Errorln(err)
return
}
deliveriesChan.Put(deliveryChan, deliveries...)
if err := p.putter.Put(deliveries); err != nil {
spirit.Logger().WithField("actor", spirit.ActorReceiver).
WithField("event", "put deliveries").
Errorln(err)
deliveriesChan.Delete(deliveries...)
res.WriteHeader(gohttp.StatusInternalServerError)
} else {
// wait http request handler to finish process
<-doneChan
deliveriesChan.Delete(deliveries...)
}
}
func (p *HTTPReceiver) Group(path string, router func(martini.Router), middlerWares ...martini.Handler) {
p.marti.Group(path, router, middlerWares...)
}
func (p *HTTPReceiver) Stop() (err error) {
p.statusLocker.Lock()
defer p.statusLocker.Unlock()
spirit.Logger().WithField("actor", spirit.ActorReceiver).
WithField("urn", "urn:spirit-contrib:receiver:http[base]").
WithField("event", "stop").
Debugln("enter stop")
if p.status == spirit.StatusStopped {
return
}
spirit.Logger().WithField("actor", spirit.ActorReceiver).
WithField("urn", "urn:spirit-contrib:receiver:http[base]").
WithField("event", "stop").
Infoln("stopped")
return
}
func (p *HTTPReceiver) Status() spirit.Status {
return p.status
}
func (p *HTTPReceiver) serve() {
var logger *log.Logger
if p.conf.DisableLogger {
logger = log.New(new(emptyWriter), "", 0)
} else {
logger = log.New(spirit.Logger().Writer(), "[http]", 0)
}
p.marti.Map(logger)
p.marti.RunOnAddr(p.conf.Address)
}