perf: optimize websocket logic

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/websocket/src/interfaces.ts

@@ -1,5 +0,0 @@
-export interface InnerClient {
-    id: string
-    send(text: string)
-    close()
-}

packages/websocket/src/netty/adapter/websocket.ts

@@ -12,8 +12,12 @@ export abstract class WebSocketHandlerAdapter {
         this._Handler = new ChannelInboundHandlerAdapterImpl()
     }
     abstract channelRead(ctx: any, channel: any)
-    abstract channelInactive(ctx: any)
+    channelInactive(ctx: any) {
-    abstract channelUnregistered(ctx: any)
+        ctx.fireChannelInactive()
+    }
+    channelUnregistered(ctx: any) {
+        ctx.fireChannelUnregistered()
+    }
     abstract exceptionCaught(ctx: any, cause: Error)
     getHandler() {
         return this._Handler

packages/websocket/src/netty/client.ts

@@ -1,45 +1,24 @@
-import { EventEmitter } from 'events'
+import { Transport } from '../transport'
-import { InnerClient } from '../interfaces'
 import { AttributeKeys } from './constants'
 
 const TextWebSocketFrame = Java.type('io.netty.handler.codec.http.websocketx.TextWebSocketFrame')
 
-export class NettyClient extends EventEmitter implements InnerClient {
+export class NettyClient extends Transport {
-    private _id: string
     private channel: any
 
-    server: any
-    readyState: string
-    remoteAddress: string
-    upgraded: boolean
-    request: any
-
     constructor(server: any, channel: any) {
-        super()
+        super(server)
-        this.server = server
-        this.readyState = 'open'
         this.remoteAddress = channel.remoteAddress() + ''
-        this.upgraded = true
         this.request = channel.attr(AttributeKeys.Request).get()
 
-        this.channel = channel
         this._id = channel.id() + ''
+        this.channel = channel
     }
 
-    get id() {
+    doSend(text: string) {
-        return this._id
+        this.channel.writeAndFlush(new TextWebSocketFrame(text))
     }
-    send(text: string) {
+    doClose() {
-        if (this.readyState == 'open') {
+        this.channel.close()
-            this.channel.writeAndFlush(new TextWebSocketFrame(text))
-        } else {
-            console.debug(`send message ${text} to close client ${this._id}`)
-        }
-    }
-    close() {
-        if (this.readyState = 'open') {
-            this.channel.close()
-            this.readyState = 'close'
-        }
     }
 }

packages/websocket/src/netty/websocket_detect.ts

@@ -11,16 +11,6 @@ export class WebSocketDetect extends WebSocketHandlerAdapter {
     channelRead(ctx: any, channel: any) {
         this.event.emit(ServerEvent.detect, ctx, channel)
     }
-    channelInactive(ctx: any) {
-        console.debug('WebSocketDetect channelUnregistered ' + ctx)
-        this.event.emit(ServerEvent.disconnect, ctx, 'client disconnect')
-        ctx.channelInactive()
-    }
-    channelUnregistered(ctx: any) {
-        console.debug('WebSocketDetect channelUnregistered ' + ctx)
-        this.event.emit(ServerEvent.disconnect, ctx, 'client disconnect')
-        ctx.fireChannelUnregistered()
-    }
     exceptionCaught(ctx: any, cause: Error) {
         this.event.emit(ServerEvent.error, ctx, cause)
     }

packages/websocket/src/netty/websocket_handler.ts

@@ -43,14 +43,14 @@ export class WebSocketHandler extends WebSocketHandlerAdapter {
 
     channelInactive(ctx: any) {
         console.debug('WebSocketHandler channelInactive ' + ctx)
-        this.options.event.emit(ServerEvent.disconnect, ctx, 'client disconnect')
+        this.options.event.emit(ServerEvent.disconnect, ctx, 'netty channelInactive')
-        ctx.channelInactive()
+        super.channelInactive(ctx)
     }
 
     channelUnregistered(ctx: any) {
         console.debug('WebSocketHandler channelUnregistered ' + ctx)
-        this.options.event.emit(ServerEvent.disconnect, ctx, 'client disconnect')
+        this.options.event.emit(ServerEvent.disconnect, ctx, 'netty channelUnregistered')
-        ctx.fireChannelUnregistered()
+        super.channelUnregistered(ctx)
     }
 
     exceptionCaught(ctx: any, cause: Error) {

packages/websocket/src/socket-io/client.ts

@@ -5,11 +5,12 @@ import { Namespace, Server, Socket } from './index'
 import { PacketTypes, SubPacketTypes } from './types'
 import { ServerEvent } from './constants'
 import { SocketId } from './adapter'
+import { Transport } from '../transport'
 
 const parser = new Parser()
 
-export class Client extends EventEmitter implements Client {
+export class Client extends EventEmitter {
-    public readonly conn
+    public readonly conn: Transport
     /**
      * @private
      */
@@ -21,6 +22,11 @@ export class Client extends EventEmitter implements Client {
     private nsps: Map<string, Socket>
     private connectTimeout: NodeJS.Timeout
 
+    private checkIntervalTimer: NodeJS.Timeout
+    private upgradeTimeoutTimer: NodeJS.Timeout
+    private pingTimeoutTimer: NodeJS.Timeout
+    private pingIntervalTimer: NodeJS.Timeout
+
     constructor(server: Server, conn) {
         super()
         this.server = server
@@ -32,6 +38,9 @@ export class Client extends EventEmitter implements Client {
         // =============================
         this.sockets = new Map()
         this.nsps = new Map()
+        // ================== engine.io
+        this.onOpen()
+        // ================== Transport
         this.conn.on(ServerEvent.disconnect, (reason) => {
             this.onclose(reason)
         })
@@ -73,7 +82,7 @@ export class Client extends EventEmitter implements Client {
      * @private
      */
     private connect(name: string, auth: object = {}) {
-        console.debug(`client ${this.id} connecting to namespace ${name} has: ${this.server._nsps[name]}`)
+        console.debug(`client ${this.id} connecting to namespace ${name} has: ${this.server._nsps.has(name)}`)
         if (this.server._nsps.has(name)) {
             return this.doConnect(name, auth)
         }
@@ -103,9 +112,7 @@ export class Client extends EventEmitter implements Client {
         const nsp = this.server.of(name)
 
         const socket = nsp._add(this, auth, () => {
-            console.debug(`doConnect set sockets ${socket.id}`)
             this.sockets.set(socket.id, socket)
-            console.debug(`doConnect set nsps ${nsp.name}`)
             this.nsps.set(nsp.name, socket)
         })
     }
@@ -128,12 +135,16 @@ export class Client extends EventEmitter implements Client {
      */
     _remove(socket: Socket) {
         if (this.sockets.has(socket.id)) {
-            const nsp = this.sockets.get(socket.id).nsp.name
             this.sockets.delete(socket.id)
-            this.nsps.delete(nsp)
+            this.nsps.delete(socket.nsp.name)
         } else {
             console.debug(`ignoring remove for ${socket.id}`,)
         }
+        process.nextTick(() => {
+            if (this.sockets.size == 0) {
+                this.onclose('no live socket')
+            }
+        })
     }
     /**
      * Closes the underlying connection.
@@ -141,6 +152,7 @@ export class Client extends EventEmitter implements Client {
      * @private
      */
     private close() {
+        console.debug(`client ${this.id} close`)
         if ("open" == this.conn.readyState) {
             console.debug("forcing transport close")
             this.onclose("forced server close")
@@ -154,7 +166,7 @@ export class Client extends EventEmitter implements Client {
      * @param {Object} opts
      * @private
      */
-    _packet(packet, opts = { preEncoded: false }) {
+    _packet(packet: Packet, opts = { preEncoded: false }) {
         // opts = opts || {}
         // const self = this
 
@@ -178,7 +190,11 @@ export class Client extends EventEmitter implements Client {
         // } else {
         //     debug("ignoring packet write %j", packet)
         // }
-        this.conn.send(opts.preEncoded ? packet as unknown as string : parser.encode(packet))
+        if ("open" == this.conn.readyState) {
+            this.conn.send(opts.preEncoded ? packet as unknown as string : parser.encode(packet))
+        } else {
+            console.debug(`ignoring write packet ${JSON.stringify(packet)} to client ${this.id} is already close!`)
+        }
     }
     /**
      * Called with incoming transport data.
@@ -202,15 +218,14 @@ export class Client extends EventEmitter implements Client {
         if (SubPacketTypes.CONNECT == packet.sub_type) {
             this.connect(packet.nsp, packet.data)
         } else {
-            const socket = this.nsps.get(packet.nsp)
+            process.nextTick(() => {
-            if (socket) {
+                const socket = this.nsps.get(packet.nsp)
-                process.nextTick(function () {
+                if (socket) {
                     socket._onpacket(packet)
-                })
+                } else {
-            } else {
+                    console.debug(`client ${this.id} no socket for namespace ${packet.nsp}.`)
-                console.debug(`client ${this.id} no socket for namespace ${packet.nsp} avalibe socket: `)
+                }
-                this.nsps.forEach((v, k) => console.debug(`- ${k} => ${v}`))
+            })
-            }
         }
     }
     /**
@@ -226,9 +241,16 @@ export class Client extends EventEmitter implements Client {
         this.conn.close()
     }
     onclose(reason?: string) {
+        this.conn.readyState = "closing"
+        // ======= engine.io
+        this.onClose(reason)
+        // cleanup connectTimeout
+        if (this.connectTimeout) {
+            clearTimeout(this.connectTimeout)
+            this.connectTimeout = null
+        }
         console.debug(`client ${this.id} close with reason ${reason}`)
         // ignore a potential subsequent `close` event
-        this.destroy()
         // `nsps` and `sockets` are cleaned up seamlessly
         for (const socket of this.sockets.values()) {
             socket._onclose(reason)
@@ -242,5 +264,97 @@ export class Client extends EventEmitter implements Client {
         // this.conn.removeListener('error', this.onerror);
         // this.conn.removeListener('close', this.onclose);
         // this.decoder.removeListener('decoded', this.ondecoded);
-    };
+    }
+
+    //================== engine.io
+    onOpen() {
+        this.conn.readyState = "open"
+        this._packet({
+            type: PacketTypes.OPEN,
+            data: {
+                sid: this.id,
+                upgrades: [],
+                pingInterval: this.server.options.pingInterval,
+                pingTimeout: this.server.options.pingTimeout
+            }
+        })
+        this.schedulePing()
+    }
+
+    onPacket(packet: Packet) {
+        if ("open" === this.conn.readyState) {
+            // export packet event
+            // debug("packet")
+            // this.emit("packet", packet)
+
+            // Reset ping timeout on any packet, incoming data is a good sign of
+            // other side's liveness
+            this.resetPingTimeout(this.server.options.pingInterval + this.server.options.pingTimeout * 2)
+            switch (packet.type) {
+                case PacketTypes.PING:
+                    this._packet({
+                        type: PacketTypes.PONG,
+                        data: packet.data
+                    })
+                    break
+                case PacketTypes.PONG:
+                    this.schedulePing()
+                    break
+                case PacketTypes.UPGRADE:
+                    break
+                case PacketTypes.MESSAGE:
+                    this.ondecoded(packet)
+                    break
+                case PacketTypes.CLOSE:
+                    this.onclose()
+                    break
+                default:
+                    console.log(`client ${this.id} reciver unknow packet type: ${packet.type}`)
+            }
+        } else {
+            console.debug(`packet received with closed client ${this.id}`)
+        }
+    }
+    /**
+     * Called upon transport considered closed.
+     * Possible reasons: `ping timeout`, `client error`, `parse error`,
+     * `transport error`, `server close`, `transport close`
+     */
+    onClose(reason, description?: string) {
+        // if ("closed" !== this.conn.readyState) {
+        clearTimeout(this.pingIntervalTimer)
+        clearTimeout(this.pingTimeoutTimer)
+
+        clearInterval(this.checkIntervalTimer)
+        this.checkIntervalTimer = null
+        clearTimeout(this.upgradeTimeoutTimer)
+        //     this.emit("close", reason, description)
+        // }
+    }
+    /**
+     * Pings client every `this.pingInterval` and expects response
+     * within `this.pingTimeout` or closes connection.
+     *
+     * @api private
+     */
+    schedulePing() {
+        clearTimeout(this.pingIntervalTimer)
+        this.pingIntervalTimer = setTimeout(() => {
+            this.resetPingTimeout(this.server.options.pingTimeout)
+            process.nextTick(() => this._packet({ type: PacketTypes.PING }))
+        }, this.server.options.pingInterval)
+    }
+
+    /**
+     * Resets ping timeout.
+     *
+     * @api private
+     */
+    resetPingTimeout(timeout) {
+        clearTimeout(this.pingTimeoutTimer)
+        this.pingTimeoutTimer = setTimeout(() => {
+            if (this.conn.readyState === "closed") return
+            this.onclose("ping timeout")
+        }, timeout)
+    }
 }

packages/websocket/src/socket-io/constants.ts

@@ -4,5 +4,6 @@ export enum ServerEvent {
     connection = 'connection',
     message = 'message',
     error = 'error',
-    disconnect = 'disconnect'
+    disconnecting = 'disconnecting',
-}
+    disconnect = 'disconnect',
+}

packages/websocket/src/socket-io/index.ts

@@ -8,7 +8,7 @@ import { PacketTypes, SubPacketTypes } from './types'
 import { Packet } from './packet'
 import { Socket } from './socket'
 import { Adapter } from './adapter'
-import { InnerClient } from '../interfaces'
+import { Transport } from '../transport'
 import { ParentNamespace } from './parent-namespace'
 
 interface EngineOptions {
@@ -144,7 +144,7 @@ class Server {
     /**
      * @private
      */
-    readonly _parser: Parser
+    _parser: Parser
     private readonly encoder
 
     /**
@@ -172,29 +172,33 @@ class Server {
      */
     _connectTimeout: number
 
-    options: ServerOptions
+    options: Partial<ServerOptions>
     private websocketServer: WebSocketServer
     private allClients: Map<string, Client>
 
     constructor(instance: any, options: Partial<ServerOptions>) {
         if (!instance) { throw new Error('instance can\'t be undefiend!') }
-        this.allClients = new Map()
+        this.options = Object.assign({
-        this._nsps = new Map()
+            event: new EventEmitter(),
-        this.connectTimeout(options.connectTimeout || 45000)
+            path: '/socket.io',
-        this._parser = options.parser || new Parser()
+            root: root + '/wwwroot',
-        this.adapter(options.adapter || Adapter)
+            serveClient: false,
+            connectTimeout: 45000,
+            wsEngine: process.env.EIO_WS_ENGINE || "ws",
+            pingTimeout: 5000,
+            pingInterval: 25000,
+            upgradeTimeout: 10000,
+            maxHttpBufferSize: 1e6,
+            transports: 'websocket',
+            allowUpgrades: true,
+            httpCompression: {
+                threshold: 1024
+            },
+            cors: false
+        }, options)
+        this.initServerConfig()
         this.sockets = this.of('/')
-        if (instance.class.name.startsWith('io.netty.channel')) {
+        this.selectServerImpl(instance)
-            let { NettyWebSocketServer } = require("../netty")
-            this.websocketServer = new NettyWebSocketServer(instance, Object.assign({
-                event: new EventEmitter(),
-                path: '/socket.io',
-                root: root + '/wwwroot'
-            }, options))
-        } else {
-            let { TomcatWebSocketServer } = require("../tomcat")
-            this.websocketServer = new TomcatWebSocketServer(instance, options)
-        }
         this.initServer()
     }
     /**
@@ -496,15 +500,6 @@ class Server {
         console.debug(`incoming connection with id ${conn.id}`)
         let client = new Client(this, conn)
         this.allClients.set(conn.id, client)
-        client._packet({
-            type: PacketTypes.OPEN,
-            data: {
-                sid: client.id,
-                upgrades: [],
-                pingInterval: 25000,
-                pingTimeout: 5000
-            }
-        })
         return this
     }
     // of(nsp: string): Namespace {
@@ -560,8 +555,9 @@ class Server {
         return nsp
     }
     close(fn?: () => void): void {
-        for (const socket of this.sockets.sockets.values()) {
+        this.clients.length
-            socket._onclose("server shutting down")
+        for (const client of this.allClients.values()) {
+            client._disconnect()
         }
 
         // this.engine.close()
@@ -605,70 +601,57 @@ class Server {
         return this.sockets.compress(args[0])
     }
     // ===============================
+    private initServerConfig() {
+        this.allClients = new Map()
+        this._nsps = new Map()
+        this.connectTimeout(this.options.connectTimeout || 45000)
+        this._parser = this.options.parser || new Parser()
+        this.adapter(this.options.adapter || Adapter)
+    }
+    private selectServerImpl(instance: any) {
+        let WebSocketServerImpl = undefined
+        if (instance.class.name.startsWith('io.netty.channel')) {
+            WebSocketServerImpl = require("../netty").NettyWebSocketServer
+        } else {
+            WebSocketServerImpl = require("../tomcat").TomcatWebSocketServer
+        }
+        this.websocketServer = new WebSocketServerImpl(instance, this.options)
+    }
     private initServer() {
-        this.websocketServer.on(ServerEvent.connect, (innerClient: InnerClient) => {
+        this.websocketServer.on(ServerEvent.connect, (transport: Transport) => {
-            this.onconnection(innerClient)
+            this.onconnection(transport)
         })
-        this.websocketServer.on(ServerEvent.message, (innerClient: InnerClient, text) => {
+        this.websocketServer.on(ServerEvent.message, (transport: Transport, text) => {
-            if (this.allClients.has(innerClient.id)) {
+            if (this.allClients.has(transport.id)) {
-                this.processPacket(this._parser.decode(text), this.allClients.get(innerClient.id))
+                let client = this.allClients.get(transport.id)
+                client.onPacket(this._parser.decode(text))
             } else {
-                console.error(`unknow engine socket ${innerClient.id} reciver message ${text}`)
+                console.error(`unknow transport ${transport.id} reciver message ${text}`)
             }
         })
-        this.websocketServer.on(ServerEvent.disconnect, (innerClient: InnerClient, reason) => {
+        this.websocketServer.on(ServerEvent.disconnect, (transport: Transport, reason) => {
-            if (this.allClients.has(innerClient.id)) {
+            if (this.allClients.has(transport.id)) {
-                this.allClients.get(innerClient.id).onclose(reason)
+                this.allClients.get(transport.id).onclose(reason)
-                this.allClients.delete(innerClient.id)
+                this.allClients.delete(transport.id)
             } else {
-                console.error(`unknow engine innerClient ${innerClient?.id} disconnect cause ${reason}`)
+                console.error(`unknow transport ${transport?.id} disconnect cause ${reason}`)
             }
         })
-        this.websocketServer.on(ServerEvent.error, (innerClient: InnerClient, cause) => {
+        this.websocketServer.on(ServerEvent.error, (transport: Transport, cause) => {
-            if (this.allClients.has(innerClient?.id)) {
+            if (this.allClients.has(transport?.id)) {
-                let client = this.allClients.get(innerClient?.id)
+                let client = this.allClients.get(transport?.id)
                 if (client.listeners(ServerEvent.error).length) {
                     client.emit(ServerEvent.error, cause)
                 } else {
-                    console.error(`engine innerClient ${innerClient.id} cause error: ${cause}`)
+                    console.error(`client ${client.id} cause error: ${cause}`)
                     console.ex(cause)
                 }
             } else {
-                console.error(`unknow innerClient ${innerClient?.id} cause error: ${cause}`)
+                console.error(`unknow transport ${transport?.id} cause error: ${cause}`)
                 console.ex(cause)
             }
         })
     }
-
-    private processPacket(packet: Packet, client: Client) {
-        switch (packet.type) {
-            case PacketTypes.PING:
-                client._packet({
-                    type: PacketTypes.PONG,
-                    data: packet.data
-                })
-                break
-            case PacketTypes.UPGRADE:
-                break
-            case PacketTypes.MESSAGE:
-                this.processSubPacket(packet, client)
-                break
-            case PacketTypes.CLOSE:
-                client.onclose()
-                break
-        }
-    }
-
-    private processSubPacket(packet: Packet, client: Client) {
-        switch (packet.sub_type) {
-            case SubPacketTypes.CONNECT:
-                client.doConnect(packet.nsp, {})
-                break
-            default:
-                client.ondecoded(packet)
-                break
-        }
-    }
 }
 
 /**

packages/websocket/src/socket-io/namespace.ts

@@ -58,7 +58,6 @@ export class Namespace extends EventEmitter {
     public use(
         fn: (socket: Socket, next: (err?: ExtendedError) => void) => void
     ): Namespace {
-        throw new Error("Method not implemented.")
         this._fns.push(fn)
         return this
     }
@@ -96,8 +95,8 @@ export class Namespace extends EventEmitter {
         return this.to(name)
     }
     _add(client: Client, query?: any, fn?: () => void) {
-        console.debug(`adding socket to nsp ${this.name}`)
         const socket = new Socket(this, client, query || {})
+        console.debug(`client ${client.id} adding socket ${socket.id} to nsp ${this.name}`)
         this.run(socket, err => {
             process.nextTick(() => {
                 if ("open" == client.conn.readyState) {
@@ -137,7 +136,7 @@ export class Namespace extends EventEmitter {
             console.debug(`namespace ${this.name} remove socket ${socket.id}`)
             this.sockets.delete(socket.id)
         } else {
-            console.debug(`ignoring remove for ${socket.id}`)
+            console.debug(`namespace ${this.name} ignoring remove for ${socket.id}`)
         }
     }
     emit(event: string, ...args: any[]): boolean {
@@ -185,9 +184,7 @@ export class Namespace extends EventEmitter {
      */
     public allSockets(): Promise<Set<SocketId>> {
         if (!this.adapter) {
-            throw new Error(
+            throw new Error("No adapter for this namespace, are you trying to get the list of clients of a dynamic namespace?")
-                "No adapter for this namespace, are you trying to get the list of clients of a dynamic namespace?"
-            )
         }
         const rooms = new Set(this._rooms)
         this._rooms.clear()
@@ -233,24 +230,9 @@ export class Namespace extends EventEmitter {
     hasBin(args: any[]) {
         return false
     }
-    del(client: Client) {
-        let socket = this.sockets[client.id]
-        socket.disconnect()
-        delete this.sockets[client.id]
-    }
     clients(fn: (sockets: Socket[]) => Namespace): Namespace {
         return fn(Object.values(this.sockets))
     }
-    process(packet: Packet, client: Client) {
-        switch (packet.sub_type) {
-            case SubPacketTypes.CONNECT:
-                client.doConnect(this.name, {})
-                break
-            default:
-                this.sockets.get(client.id)._onpacket(packet)
-                break
-        }
-    }
     close() {
         this.removeAllListeners(ServerEvent.connect)
         this.removeAllListeners(ServerEvent.connection)

packages/websocket/src/socket-io/socket.ts

@@ -88,15 +88,6 @@ export class Socket extends EventEmitter {
     private _rooms: Set<Room> = new Set();
     private _anyListeners: Array<(...args: any[]) => void>
 
-    private events = [
-        'connect',
-        "connect_error",
-        'disconnect',
-        'disconnecting',
-        'newListener',
-        'removeListener'
-    ]
-
     constructor(nsp: Namespace, client: Client, auth = {}) {
         super()
         this.nsp = nsp
@@ -114,12 +105,6 @@ export class Socket extends EventEmitter {
         this._rooms = new Set()
     }
     emit(event: string, ...args: any[]): boolean {
-        if (~this.events.indexOf(event)) {
-            super.emit(event, ...args)
-            // @ts-ignore
-            return this
-        }
-
         let packet: Packet = {
             type: PacketTypes.MESSAGE,
             sub_type: (this.flags.binary !== undefined ? this.flags.binary : this.hasBin(args)) ? SubPacketTypes.BINARY_EVENT : SubPacketTypes.EVENT,
@@ -213,9 +198,9 @@ export class Socket extends EventEmitter {
       * @private
       */
     _onconnect(): void {
-        console.debug("socket connected - writing packet")
+        console.debug(`socket ${this.id} connected - writing packet`)
         this.join(this.id)
-        this.packet({ type: PacketTypes.MESSAGE, sub_type: SubPacketTypes.CONNECT })
+        this.packet({ type: PacketTypes.MESSAGE, sub_type: SubPacketTypes.CONNECT, data: { sid: this.id } })
     }
     _onpacket(packet: Packet) {
         switch (packet.sub_type) {
@@ -246,7 +231,7 @@ export class Socket extends EventEmitter {
     }
     onevent(packet: Packet) {
         if (null != packet.id) {
-            console.debug('attaching ack callback to event')
+            console.trace(`attaching ack ${packet.id} callback to client ${this.id} event`)
             this.dispatch(packet, this.ack(packet.id))
         } else {
             this.dispatch(packet)
@@ -266,13 +251,13 @@ export class Socket extends EventEmitter {
         }
     }
     onack(packet: Packet) {
-        let ack = this.acks[packet.id]
+        let ack = this.acks.get(packet.id)
         if ('function' == typeof ack) {
-            console.debug('calling ack %s with %j', packet.id, packet.data)
+            console.trace(`calling ack ${packet.id} on socket ${this.id} with ${packet.data}`)
             ack.apply(this, packet.data)
-            delete this.acks[packet.id]
+            this.acks.delete(packet.id)
         } else {
-            console.debug('bad ack %s', packet.id)
+            console.trace(`bad ack ${packet.id} on socket ${this.id}`)
         }
     }
     /**
@@ -281,7 +266,7 @@ export class Socket extends EventEmitter {
      * @private
      */
     private ondisconnect(): void {
-        console.debug("got disconnect packet")
+        console.debug(`socket ${this.id} got disconnect packet`)
         this._onclose("client namespace disconnect")
     }
 
@@ -294,7 +279,7 @@ export class Socket extends EventEmitter {
         if (this.listeners("error").length) {
             super.emit("error", err)
         } else {
-            console.error("Missing error handler on `socket`.")
+            console.error(`Missing error handler on 'socket(${this.id})'.`)
             console.error(err.stack)
         }
     }
@@ -308,15 +293,15 @@ export class Socket extends EventEmitter {
      * @private
      */
     _onclose(reason: string) {
-        console.debug(`closing socket - reason: ${reason} connected: ${this.connected}`)
         if (!this.connected) return this
-        this.emit('disconnecting', reason)
+        console.debug(`closing socket ${this.id} - reason: ${reason} connected: ${this.connected}`)
+        super.emit(ServerEvent.disconnecting, reason)
         this.leaveAll()
         this.nsp._remove(this)
         this.client._remove(this)
         this.connected = false
         this.disconnected = true
-        this.emit('disconnect', reason)
+        super.emit(ServerEvent.disconnect, reason)
     }
 
     /**
@@ -496,8 +481,8 @@ export class Socket extends EventEmitter {
             this._onerror(error)
         }
     }
-    dispatch(packet: Packet, ack?: Function) {
+    dispatch(packet: Packet, ack?: () => void) {
-        if (ack) { this.acks[packet.id] = ack }
+        if (ack) { this.acks.set(packet.id, ack) }
         super.emit(packet.name, ...packet.data, ack)
     }
     private hasBin(obj: any) {

packages/websocket/src/tomcat/client.ts

@@ -1,45 +1,22 @@
-import { EventEmitter } from 'events'
+import { Transport } from '../transport'
-import { InnerClient } from '../interfaces'
 
-export class TomcatClient extends EventEmitter implements InnerClient {
+export class TomcatClient extends Transport {
-    private _id: string
     private session: javax.websocket.Session
 
-    server: any
-    readyState: string
-    remoteAddress: string
-    upgraded: boolean
-    request: any
-
     constructor(server: any, session: javax.websocket.Session) {
-        super()
+        super(server)
-        this.server = server
-        this.readyState = 'open'
         this.remoteAddress = session + ''
-        this.upgraded = true
         this.request = {
             uri: () => `${session.getRequestURI()}`,
             headers: () => []
         }
-
-        this.session = session
         this._id = session.getId() + ''
+        this.session = session
     }
-
+    doSend(text: string) {
-    get id() {
+        Java.synchronized(() => this.session.getBasicRemote().sendText(text), this.session)()
-        return this._id
     }
-    send(text: string) {
+    doClose() {
-        if (this.readyState == 'open') {
+        this.session.close()
-            Java.synchronized(() => this.session.getBasicRemote().sendText(text), this.session)()
-        } else {
-            console.debug(`send message ${text} to close client ${this._id}`)
-        }
-    }
-    close() {
-        if (this.readyState == 'open') {
-            this.readyState = 'close'
-            this.session.close()
-        }
     }
 }

packages/websocket/src/transport.ts

@@ -0,0 +1,35 @@
+import { EventEmitter } from 'events'
+
+export abstract class Transport extends EventEmitter {
+    protected _id: string
+
+    server: any
+    readyState: 'opening' | 'open' | 'closing' | 'closed'
+    remoteAddress: string
+    upgraded: boolean
+    request: any
+
+    constructor(server: any) {
+        super()
+        this.server = server
+        this.readyState = 'open'
+        this.upgraded = true
+    }
+    get id() {
+        return this._id
+    }
+    send(text: string) {
+        if (this.readyState == 'open') {
+            this.doSend(text)
+        } else {
+            console.debug(`send message ${text} to close client ${this._id}`)
+        }
+    }
+    close() {
+        if ("closed" === this.readyState || "closing" === this.readyState) { return }
+        this.doClose()
+        this.readyState = 'closed'
+    }
+    abstract doSend(text: string)
+    abstract doClose()
+}