/
socket.go
511 lines (446 loc) · 15.1 KB
/
socket.go
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package sabuhp
import (
"net"
"sync"
"github.com/influx6/npkg"
"github.com/influx6/npkg/nerror"
"github.com/influx6/npkg/njson"
"github.com/influx6/npkg/nthen"
"github.com/influx6/npkg/nxid"
)
// SocketHandler defines the function contract to be called for a socket instace.
type SocketHandler func(from Socket)
// SocketByteHandler defines the function contract a manager uses
// to handle a message.
//
// Be aware that returning an error from the handler to the Gorilla socket
// will cause the immediate closure of that socket and ending communication
// with the client and the error will be logged. So unless your intention is to
// end the connection, handle it yourself.
type SocketByteHandler func(b []byte, from Socket) error
// SocketMessageHandler defines the function contract a sabuhp.Socket uses
// to handle a message.
//
// Be aware that returning an error from the handler to the Gorilla sabuhp.Socket
// will cause the immediate closure of that socket and ending communication
// with the client and the error will be logged. So unless your intention is to
// end the connection, handle it yourself.
type SocketMessageHandler func(b Message, from Socket) error
type SocketStat struct {
Addr net.Addr
RemoteAddr net.Addr
Id string
Sent int64
Received int64
Handled int64
}
func (g SocketStat) EncodeObject(encoder npkg.ObjectEncoder) {
encoder.String("id", g.Id)
encoder.Int64("total_sent", g.Sent)
encoder.Int64("total_handled", g.Handled)
encoder.Int64("total_received", g.Received)
encoder.String("addr", g.Addr.String())
encoder.String("addr_network", g.Addr.Network())
encoder.String("remote_addr", g.RemoteAddr.String())
encoder.String("remote_addr_network", g.RemoteAddr.Network())
}
// Socket defines an underline connection handler which handles
// delivery of messages to the underline stream.
type Socket interface {
ID() nxid.ID
Send(...Message)
Stat() SocketStat
LocalAddr() net.Addr
RemoteAddr() net.Addr
Listen(SocketMessageHandler)
}
type SocketService interface {
SocketOpened(Socket)
SocketClosed(Socket)
}
type SocketServer interface {
Stream(SocketService)
}
type StreamFunc struct {
Listen func(Message, Socket) error
Subscribe func(Message, Socket) error
Unsubscribe func(Message, Socket) error
Closed func(Socket)
}
func (st StreamFunc) SocketClosed(socket Socket) {
if st.Closed == nil {
return
}
st.Closed(socket)
}
func (st StreamFunc) SocketOpened(socket Socket) {
socket.Listen(func(message Message, from Socket) error {
if message.Topic == UNSUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
return nerror.New("no unsubscription topic or group provided")
}
return st.Unsubscribe(message, from)
}
if message.Topic == SUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
return nerror.New("no subscription topic or group provided")
}
return st.Subscribe(message, from)
}
if err := st.Listen(message, from); err != nil {
return nerror.WrapOnly(err)
}
return nil
})
}
type StreamBus struct {
Logger Logger
Bus MessageBus
ml sync.RWMutex
channels map[nxid.ID][]Channel
}
func NewStreamBus(logger Logger, bus MessageBus) *StreamBus {
return &StreamBus{Logger: logger, Bus: bus, channels: map[nxid.ID][]Channel{}}
}
// WithBus returns the instance of a StreamBus which will be connected to the provided SocketServer
// and handle delivery of messages to a message bus and subscription/unsubcriptions as well.
func WithBus(logger Logger, socketServer SocketServer, bus MessageBus) *StreamBus {
var stream = NewStreamBus(logger, bus)
socketServer.Stream(stream)
return stream
}
func (st *StreamBus) SocketClosed(socket Socket) {
st.ml.RLock()
defer st.ml.RUnlock()
if channels, hasChannel := st.channels[socket.ID()]; hasChannel {
for _, channel := range channels {
channel.Close()
}
}
}
func (st *StreamBus) SocketOpened(socket Socket) {
socket.Listen(func(message Message, from Socket) error {
if message.Topic == UNSUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
st.Logger.Log(njson.MJSON("failed to handle message for subscription without group or topic", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("subscription_topic", message.SubscribeTo)
event.String("subscription_group", message.SubscribeGroup)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
}
return st.SocketUnsubscribe(message, from)
}
if message.Topic == SUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
st.Logger.Log(njson.MJSON("failed to handle message for subscription without group or topic", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("subscription_topic", message.SubscribeTo)
event.String("subscription_group", message.SubscribeGroup)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
}
return st.SocketSubscribe(message, from)
}
if err := st.SocketBusSend(message, from); err != nil {
st.Logger.Log(njson.MJSON("failed to handle message from from", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.Error("error", err)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
return err
}
return nil
})
}
func (st *StreamBus) SocketSubscribe(b Message, socket Socket) MessageErr {
var channel = st.Bus.Listen(b.SubscribeTo, b.SubscribeGroup, TransportResponseFunc(func(message Message, transport Transport) MessageErr {
var ft = message.Future
if message.Future == nil {
ft = nthen.NewFuture()
message.Future = ft
}
socket.Send(message)
if sendErr := ft.Err(); sendErr != nil {
st.Logger.Log(njson.MJSON("failed to send ok message", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("error", sendErr.Error())
event.String("socket_id", socket.ID().String())
event.Object("socket_stat", socket.Stat())
}))
var unwrappedErr = nerror.UnwrapDeep(sendErr)
if unwrappedSendErr, ok := unwrappedErr.(MessageErr); ok {
return unwrappedSendErr
}
return WrapErr(sendErr, false)
}
return nil
}))
st.ml.Lock()
var socketChannels, hasSocketChannels = st.channels[socket.ID()]
if !hasSocketChannels {
socketChannels = append(socketChannels, channel)
}
st.channels[socket.ID()] = socketChannels
st.ml.Unlock()
return nil
}
func (st *StreamBus) SocketUnsubscribe(b Message, socket Socket) MessageErr {
st.ml.RLock()
defer st.ml.RUnlock()
if channels, hasChannel := st.channels[socket.ID()]; hasChannel {
for _, channel := range channels {
if channel.Topic() == b.SubscribeTo && channel.Group() == b.SubscribeGroup {
channel.Close()
}
}
}
return nil
}
func (st *StreamBus) SocketBusSend(b Message, _ Socket) MessageErr {
var mb = &b
if mb.Future == nil {
mb.Future = nthen.NewFuture()
}
st.Bus.Send(b)
return WrapErr(mb.Future.Err(), false)
}
type StreamBusRelay struct {
Logger Logger
BusRelay *BusRelay
Bus MessageBus
}
func NewStreamBusRelay(logger Logger, bus MessageBus, relay *BusRelay) *StreamBusRelay {
return &StreamBusRelay{Logger: logger, Bus: bus, BusRelay: relay}
}
// WithBusRelay returns the instance of a StreamBusRelay which will be connected to the provided SocketServer
// and handle delivery of messages to a message bus and subscription to a target relay.
func WithBusRelay(logger Logger, socketServer SocketServer, bus MessageBus, relay *BusRelay) *StreamBusRelay {
var stream = NewStreamBusRelay(logger, bus, relay)
socketServer.Stream(stream)
return stream
}
func (st *StreamBusRelay) SocketClosed(socket Socket) {
st.BusRelay.Relay.UnlistenAllWithId(socket.ID())
}
func (st *StreamBusRelay) SocketOpened(socket Socket) {
socket.Listen(func(message Message, from Socket) error {
if message.Topic == UNSUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
st.Logger.Log(njson.MJSON("failed to handle message for subscription without group or topic", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("subscription_topic", message.SubscribeTo)
event.String("subscription_group", message.SubscribeGroup)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
}
return st.SocketUnsubscribe(message, from)
}
if message.Topic == SUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
st.Logger.Log(njson.MJSON("failed to handle message for subscription without group or topic", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("subscription_topic", message.SubscribeTo)
event.String("subscription_group", message.SubscribeGroup)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
}
return st.SocketSubscribe(message, from)
}
if err := st.SocketBusSend(message, from); err != nil {
st.Logger.Log(njson.MJSON("failed to handle message from from", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.Error("error", err)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
return err
}
return nil
})
}
func (st *StreamBusRelay) SocketSubscribe(b Message, socket Socket) MessageErr {
var group = st.BusRelay.Group(b.SubscribeTo, b.SubscribeGroup)
var channel = group.Listen(TransportResponseFunc(func(message Message, transport Transport) MessageErr {
var ft = message.Future
if message.Future == nil {
ft = nthen.NewFuture()
message.Future = ft
}
socket.Send(message)
if sendErr := ft.Err(); sendErr != nil {
st.Logger.Log(njson.MJSON("failed to send ok message", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("error", sendErr.Error())
event.String("socket_id", socket.ID().String())
event.Object("socket_stat", socket.Stat())
}))
var unwrappedErr = nerror.UnwrapDeep(sendErr)
if unwrappedSendErr, ok := unwrappedErr.(MessageErr); ok {
return unwrappedSendErr
}
return WrapErr(sendErr, false)
}
return nil
}))
if b.Future != nil {
b.Future.WithValue(channel)
}
return nil
}
func (st *StreamBusRelay) SocketUnsubscribe(b Message, socket Socket) MessageErr {
var group = st.BusRelay.Group(b.SubscribeTo, b.SubscribeGroup)
group.Remove(socket.ID())
if b.Future != nil {
b.Future.WithValue(nil)
}
return nil
}
func (st *StreamBusRelay) SocketBusSend(b Message, _ Socket) MessageErr {
var mb = &b
if mb.Future == nil {
mb.Future = nthen.NewFuture()
}
st.Bus.Send(b)
var itemErr = mb.Future.Err()
if itemErr != nil {
return WrapErr(mb.Future.Err(), false)
}
return nil
}
type StreamRelay struct {
Logger Logger
Relay *PbRelay
Bus MessageBus
}
func NewStreamRelay(logger Logger, bus MessageBus, relay *PbRelay) *StreamRelay {
return &StreamRelay{Logger: logger, Bus: bus, Relay: relay}
}
// WithRelay returns the instance of a StreamRelay which will be connected to the provided SocketServer
// and handle delivery of messages to a message bus and subscription to a target relay.
func WithRelay(logger Logger, socketServer SocketServer, bus MessageBus, relay *PbRelay) *StreamRelay {
var stream = NewStreamRelay(logger, bus, relay)
socketServer.Stream(stream)
return stream
}
func (st *StreamRelay) SocketClosed(socket Socket) {
st.Relay.UnlistenAllWithId(socket.ID())
}
func (st *StreamRelay) SocketOpened(socket Socket) {
socket.Listen(func(message Message, from Socket) error {
if message.Topic == UNSUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
st.Logger.Log(njson.MJSON("failed to handle message for subscription without group or topic", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("subscription_topic", message.SubscribeTo)
event.String("subscription_group", message.SubscribeGroup)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
}
return st.SocketUnsubscribe(message, from)
}
if message.Topic == SUBSCRIBE {
if len(message.SubscribeTo) == 0 || len(message.SubscribeGroup) == 0 {
st.Logger.Log(njson.MJSON("failed to handle message for subscription without group or topic", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("subscription_topic", message.SubscribeTo)
event.String("subscription_group", message.SubscribeGroup)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
}
return st.SocketSubscribe(message, from)
}
if err := st.SocketBusSend(message, from); err != nil {
st.Logger.Log(njson.MJSON("failed to handle message from from", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.Error("error", err)
event.String("socket_id", from.ID().String())
event.Object("socket_stat", from.Stat())
}))
return err
}
return nil
})
}
func (st *StreamRelay) SocketSubscribe(b Message, socket Socket) MessageErr {
var group = st.Relay.Group(b.SubscribeTo, b.SubscribeGroup)
var channel = group.Listen(TransportResponseFunc(func(message Message, transport Transport) MessageErr {
var ft = message.Future
if message.Future == nil {
ft = nthen.NewFuture()
message.Future = ft
}
socket.Send(message)
if sendErr := ft.Err(); sendErr != nil {
st.Logger.Log(njson.MJSON("failed to send ok message", func(event npkg.Encoder) {
event.Int("_level", int(npkg.ERROR))
event.String("error", sendErr.Error())
event.String("socket_id", socket.ID().String())
event.Object("socket_stat", socket.Stat())
}))
var unwrappedErr = nerror.UnwrapDeep(sendErr)
if unwrappedSendErr, ok := unwrappedErr.(MessageErr); ok {
return unwrappedSendErr
}
return WrapErr(sendErr, false)
}
return nil
}))
if b.Future != nil {
b.Future.WithValue(channel)
}
return nil
}
func (st *StreamRelay) SocketUnsubscribe(b Message, socket Socket) MessageErr {
var group = st.Relay.Group(b.SubscribeTo, b.SubscribeGroup)
group.Remove(socket.ID())
if b.Future != nil {
b.Future.WithValue(nil)
}
return nil
}
func (st *StreamRelay) SocketBusSend(b Message, _ Socket) MessageErr {
var mb = &b
if mb.Future == nil {
mb.Future = nthen.NewFuture()
}
st.Bus.Send(b)
var itemErr = mb.Future.Err()
if itemErr != nil {
return WrapErr(mb.Future.Err(), false)
}
return nil
}
type SocketServers struct {
sm sync.RWMutex
streams []SocketService
}
func NewSocketServers() *SocketServers {
return &SocketServers{}
}
func (htp *SocketServers) SocketClosed(socket Socket) {
htp.sm.RLock()
defer htp.sm.RUnlock()
for _, stream := range htp.streams {
stream.SocketClosed(socket)
}
}
func (htp *SocketServers) SocketOpened(socket Socket) {
htp.sm.RLock()
defer htp.sm.RUnlock()
for _, stream := range htp.streams {
stream.SocketOpened(socket)
}
}
func (htp *SocketServers) Stream(server SocketService) {
htp.sm.Lock()
defer htp.sm.Unlock()
htp.streams = append(htp.streams, server)
}