func ListenToEvents() {
clients := make([]*events.SomeSocket, 0, 1024)
clientsCounter := 0
for {
select {
case newVoteEvent := <-*events.GetNewVoteChan():
for _, client := range clients {
client.NewVoteEvent <- &newVoteEvent
}
case voteUpdateEvent := <-*events.GetVoteUpdateChan():
for _, client := range clients {
client.VoteUpdEvent <- &voteUpdateEvent
}
case newSocketEvent := <-*events.GetNewSocketsChan():
clientsCounter++
newSocketEvent.Socket.Id = strconv.Itoa(clientsCounter)
clients = append(clients, newSocketEvent.Socket)
case socketClosedEvent := <-*events.GetClosedSocketsChan():
id := socketClosedEvent.Socket.Id
index := 0
for i, socket := range clients {
if socket.Id == id {
index = i
}
}
clients = append(clients[:index], clients[index+1:]...)
}
}
}
func HandleNewConnection(c net.Conn) {
s := TcpSocket{conection: &c}
// closing in ListenToEvents()
s.SomeSocket.NewVoteEvent = make(chan *events.NewVoteEvent)
s.SomeSocket.VoteUpdEvent = make(chan *events.VoteUpdateEvent)
s.SomeSocket.CloseEvent = make(chan *events.SocketClosedEvent)
go s.ListenToEvents()
*events.GetNewSocketsChan() <- events.NewSocketEvent{&s.SomeSocket}
defer ConnectionClosed(&s)
// read
for {
header := make([]byte, 6)
headerLen, err := c.Read(header)
if err != nil || headerLen != 6 {
break
}
packet := InitPacketWithHeaderData(header)
if packet.size > 0 {
content := make([]byte, packet.size)
contLen, err := c.Read(content)
if err != nil || contLen != int(packet.size) {
break
}
packet.content = content
}
s.ProccesPacket(&packet)
}
}
func ListenAndServer(host string, ns *notification.Sender) {
notificationSender = ns
l, err := net.Listen("tcp", host)
if err != nil {
log.Println("TcpSocket Error listening:", err.Error())
os.Exit(1)
}
println("Starting tcp server...")
defer l.Close()
defer close(*events.GetNewVoteChan())
defer close(*events.GetVoteUpdateChan())
defer close(*events.GetNewSocketsChan())
defer close(*events.GetClosedSocketsChan())
go ListenToEvents()
for {
conn, err := l.Accept()
if err != nil {
log.Println("TcpSocket Error accepting: ", err.Error())
os.Exit(1)
}
go HandleNewConnection(conn)
}
}
func ListenAndServer(host string, ns *notification.Sender, dbconn string) {
notificationSender = ns
dbConnectionAddress = dbconn
l, err := net.Listen("tcp", host)
if err != nil {
log.Error.Printf("TcpSocket Error listening: %s\n", err.Error())
os.Exit(1)
}
defer l.Close()
defer close(*events.GetNewVoteChan())
defer close(*events.GetVoteUpdateChan())
defer close(*events.GetNewSocketsChan())
defer close(*events.GetClosedSocketsChan())
go ListenToEvents()
for {
conn, err := l.Accept()
if err != nil {
log.Error.Printf("TcpSocket Error accepting: %s\n", err.Error())
os.Exit(1)
}
go handleNewConnection(conn)
}
}
func handleNewConnection(c net.Conn) {
funcPrefix := "Handling new connection"
log.Debug.Printf("%s: start\n", funcPrefix)
defer log.Debug.Printf("%s: end\n", funcPrefix)
s := TcpSocket{connection: &c}
// closing in ListenToEvents()
s.SomeSocket.NewVoteEvent = make(chan *events.NewVoteEvent)
s.SomeSocket.VoteUpdEvent = make(chan *events.VoteUpdateEvent)
s.SomeSocket.CloseEvent = make(chan *events.SocketClosedEvent)
go s.ListenToEvents()
log.Debug.Printf("%s: sending new socket connection event...\n", funcPrefix)
*events.GetNewSocketsChan() <- events.NewSocketEvent{&s.SomeSocket}
defer connectionClosed(&s)
defer log.Debug.Printf("%s: closing connection...\n", funcPrefix)
// read
log.Debug.Printf("%s: start reading packets from socket connection\n", funcPrefix)
for {
header := make([]byte, 6)
headerLen, err := c.Read(header)
if err != nil || headerLen != 6 {
break
}
packet := InitPacketWithHeaderData(header)
if packet.size > 0 {
content := make([]byte, packet.size)
contLen, err := c.Read(content)
if err != nil || contLen != int(packet.size) {
break
}
packet.content = content
}
s.ProcessPacket(&packet)
}
log.Debug.Printf("%s: finish reading packets from socket connection\n", funcPrefix)
}
func ListenToEvents() {
funcPrefix := "Processing socket managing events"
log.Debug.Printf("%s: start\n", funcPrefix)
defer log.Debug.Printf("%s: end\n", funcPrefix)
clients := make([]*events.SomeSocket, 0, 1024)
clientsCounter := 0
for {
select {
case newVoteEvent := <-*events.GetNewVoteChan():
log.Debug.Printf("%s: handling vote create event\n", funcPrefix)
for _, client := range clients {
client.NewVoteEvent <- &newVoteEvent
}
case voteUpdateEvent := <-*events.GetVoteUpdateChan():
log.Debug.Printf("%s: handling vote update event\n", funcPrefix)
for _, client := range clients {
client.VoteUpdEvent <- &voteUpdateEvent
}
case newSocketEvent := <-*events.GetNewSocketsChan():
log.Debug.Printf("%s: handling socket connection create event\n", funcPrefix)
clientsCounter++
newSocketEvent.Socket.Id = strconv.Itoa(clientsCounter)
clients = append(clients, newSocketEvent.Socket)
case socketClosedEvent := <-*events.GetClosedSocketsChan():
log.Debug.Printf("%s: handling socket connection close event\n", funcPrefix)
id := socketClosedEvent.Socket.Id
index := 0
for i, socket := range clients {
if socket.Id == id {
index = i
}
}
clients = append(clients[:index], clients[index+1:]...)
}
}
}
