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node.go
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node.go
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package rpc
import (
"net"
)
type ApiProcessor interface {
Start() (err error)
ProcessRequest(req *Packet) (resp Params)
}
type Node struct {
Name string
Addr string
Processor ApiProcessor
listener *net.TCPListener
finished chan bool
}
func NewNode(name, addr string, processor ApiProcessor) (*Node, error) {
netAddr, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
return nil, err
}
ln, err := net.ListenTCP("tcp", netAddr)
if err != nil {
return nil, err
}
log.Debug("Node binded at %s", addr)
return &Node{
Name: name,
Addr: addr,
Processor: processor,
listener: ln,
finished: make(chan bool),
}, nil
}
func (node *Node) Run() (err error) {
err = node.Processor.Start()
if err != nil {
return err
}
for {
conn, err := node.listener.AcceptTCP()
if err != nil {
log.Debug("Accept error: %s", err.Error())
break
}
log.Debug("Accept connection from: %s", conn.RemoteAddr().String())
go node.handleConnection(conn)
}
node.finished <- true
return err
}
func (node *Node) Close() error {
err := node.listener.Close()
if err != nil {
return err
}
<-node.finished
return nil
}
func (node *Node) handleConnection(conn *net.TCPConn) {
rConn := GetConnection(conn)
for {
packet, err := rConn.readPacket()
if err != nil {
break
}
data := node.Processor.ProcessRequest(packet)
resp := Packet{Type: PT_RESPONSE, CmdID: packet.CmdID, Data: data}
err = rConn.writePacket(&resp)
if err != nil {
log.Error("Write to socket error: %s", err.Error())
break
}
}
rConn.Close()
}