83 lines
1.3 KiB
Go
83 lines
1.3 KiB
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"log"
|
||
|
|
|
||
|
|
"golang.org/x/net/websocket"
|
||
|
|
)
|
||
|
|
|
||
|
|
const channelBufSize = 100
|
||
|
|
|
||
|
|
var maxId int = 0
|
||
|
|
|
||
|
|
// Node client.
|
||
|
|
type NodeClient struct {
|
||
|
|
id int
|
||
|
|
ws *websocket.Conn
|
||
|
|
server *NodeServer
|
||
|
|
ch chan *Node
|
||
|
|
doneCh chan bool
|
||
|
|
}
|
||
|
|
|
||
|
|
// Create new node client.
|
||
|
|
func NewNodeClient(ws *websocket.Conn, server *NodeServer) *NodeClient {
|
||
|
|
|
||
|
|
if ws == nil {
|
||
|
|
panic("ws cannot be nil")
|
||
|
|
}
|
||
|
|
|
||
|
|
if server == nil {
|
||
|
|
panic("server cannot be nil")
|
||
|
|
}
|
||
|
|
|
||
|
|
maxId++
|
||
|
|
ch := make(chan *Node, channelBufSize)
|
||
|
|
doneCh := make(chan bool)
|
||
|
|
|
||
|
|
return &NodeClient{maxId, ws, server, ch, doneCh}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *NodeClient) Conn() *websocket.Conn {
|
||
|
|
return c.ws
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *NodeClient) Write(node *Node) {
|
||
|
|
select {
|
||
|
|
case c.ch <- node:
|
||
|
|
default:
|
||
|
|
c.server.Del(c)
|
||
|
|
err := fmt.Errorf("NodeClient %d is disconnected.", c.id)
|
||
|
|
c.server.Err(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *NodeClient) Done() {
|
||
|
|
c.doneCh <- true
|
||
|
|
}
|
||
|
|
|
||
|
|
// Listen Write and Read request via chanel
|
||
|
|
func (c *NodeClient) Listen() {
|
||
|
|
go c.listenWrite()
|
||
|
|
}
|
||
|
|
|
||
|
|
// Listen write request via chanel
|
||
|
|
func (c *NodeClient) listenWrite() {
|
||
|
|
log.Println("Listening write to NodeClient")
|
||
|
|
for {
|
||
|
|
select {
|
||
|
|
|
||
|
|
// send message to the client
|
||
|
|
case node := <-c.ch:
|
||
|
|
log.Println("Send:", node)
|
||
|
|
websocket.JSON.Send(c.ws, node)
|
||
|
|
|
||
|
|
// receive done request
|
||
|
|
case <-c.doneCh:
|
||
|
|
c.server.Del(c)
|
||
|
|
c.doneCh <- true // for listenRead method
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|