/
server.go
120 lines (97 loc) · 1.95 KB
/
server.go
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package ws
import (
"code.google.com/p/go.net/websocket"
"github.com/howbazaar/loggo"
"github.com/straumur/straumur"
"net/http"
)
var (
logger = loggo.GetLogger("straumur.websocket")
)
type Server struct {
pattern string
events chan *straumur.Event
clients map[int]*Client
addCh chan *Client
delCh chan *Client
doneCh chan bool
errCh chan error
}
// Create a new Websocket broadcaster
func NewServer(pattern string) *Server {
clients := make(map[int]*Client)
addCh := make(chan *Client)
delCh := make(chan *Client)
doneCh := make(chan bool)
errCh := make(chan error)
events := make(chan *straumur.Event)
return &Server{
pattern,
events,
clients,
addCh,
delCh,
doneCh,
errCh,
}
}
func (s *Server) Add(c *Client) {
s.addCh <- c
}
func (s *Server) Del(c *Client) {
s.delCh <- c
}
func (s *Server) Done() {
s.doneCh <- true
}
func (s *Server) Err(err error) {
s.errCh <- err
}
func (s *Server) sendAll(event *straumur.Event) {
for _, c := range s.clients {
logger.Debugf("%+v", c.query)
if c.query.Match(*event) {
c.Write(event)
}
}
}
func (s *Server) Broadcast(e *straumur.Event) {
s.events <- e
}
func (s *Server) Run(ec chan error) {
// websocket handler
onConnected := func(ws *websocket.Conn) {
defer func() {
err := ws.Close()
if err != nil {
s.errCh <- err
}
}()
client := NewClient(ws, s)
s.Add(client)
client.Listen()
}
http.Handle(s.pattern, websocket.Handler(onConnected))
for {
select {
// Add new a client
case c := <-s.addCh:
logger.Debugf("Added new client")
s.clients[c.id] = c
logger.Debugf("Now", len(s.clients), "clients connected.")
// del a client
case c := <-s.delCh:
logger.Debugf("Delete client")
delete(s.clients, c.id)
// consume event feed
case event := <-s.events:
logger.Debugf("Send all:", event)
s.sendAll(event)
case err := <-s.errCh:
logger.Errorf("Error:", err.Error())
ec <- err
case <-s.doneCh:
return
}
}
}