/
hub.go
87 lines (74 loc) · 1.48 KB
/
hub.go
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package straumur
import (
"github.com/howbazaar/loggo"
)
type hub struct {
feeds []EventFeed
db DataBackend
broadcasters []Broadcaster
dataservices []DataService
Errs chan error
quit chan struct{}
processors map[string]*processorList
}
var (
logger = loggo.GetLogger("straumur.core")
)
func NewHub(d DataBackend) *hub {
return &hub{
db: d,
Errs: make(chan error),
quit: make(chan struct{}),
processors: make(map[string]*processorList),
}
}
func (h *hub) RegisterProcessor(step, pattern string, f Processor) error {
pl, ok := h.processors[step]
if !ok {
pl = NewProcessorList()
h.processors[step] = pl
}
err := pl.Register(pattern, f)
if err != nil {
logger.Errorf("Registering processor failed: %+v", err)
}
return err
}
func (h *hub) AddFeeds(efs ...EventFeed) {
for _, e := range efs {
h.feeds = append(h.feeds, e)
}
}
func (h *hub) AddBroadcasters(bcs ...Broadcaster) {
for _, b := range bcs {
h.broadcasters = append(h.broadcasters, b)
}
}
func (h *hub) Run() {
merged := Merge(h.feeds...)
for {
var e *Event
select {
case e = <-merged.Updates():
pl, ok := h.processors["pre"]
if ok {
h.Errs <- pl.Process(e)
}
err := h.db.Save(e)
if err != nil {
h.Errs <- err
}
for _, b := range h.broadcasters {
go b.Broadcast(e)
}
case <-h.quit:
h.Errs <- merged.Close()
return
}
}
return
}
func (h *hub) Close() {
logger.Infof("Closing hub")
close(h.quit)
}