package main
import (
"Wsd"
"fmt"
"time"
)
const (
tcpHeaderSize = 7
tcpMaxLength = 260
// Default TCP timeout is not set
tcpTimeout = 10 * time.Second
tcpIdleTimeout = 60 * time.Second
)
type ClientHandlert interface {
Packager1
Transporter1
}
type Test struct {
}
func (t *Test)Verify(aduRequest []byte, aduResponse []byte) (err error) {
return err
}
func (t Test)Send1(aduRequest []byte) (aduResponse []byte, err error) {
return
}
func main() {
handler := Wsd.NewTCPClientHandler("localhost:502")
fmt.Printf("%T\n", handler)
fmt.Printf("%+v\n", handler)
//&{tcpPackager:{transactionId:0 SlaveId:0} tcpTransporter:{Address:localhost:502 Timeout:10s IdleTimeout:1m0s Logger:<nil> mu:{state:0 sema:0} conn:<nil> closeTimer:<nil> lastActivity:{wall:0 ext:0 loc:<nil>}}}
//NewClient(handler)
test(handler)
var a *Test/*必须是指针对象，如果不是指针对象，那么方法必须是非指针方法*/
test(a)//对象赋值给接口
}
func test(ss ClientHandlert) {
/*ss 此时是ClientHandler的一个变量，一旦由外部对象调用，则变成了对象*/
fmt.Printf("%T\n",ss)
}
// NewClient creates Ainterface new modbus client with given backend handler.
func NewClient(handler ClientHandlert) Client { /*对象赋值给接口*/
return &client{packager: handler, transporter: handler} /*返回该接口对象*/
}
type Packager1 interface {
//Encode(pdu *ProtocolDataUnit) (adu []byte, err error)
//Decode(adu []byte) (pdu *ProtocolDataUnit, err error)
Verify(aduRequest []byte, aduResponse []byte) (err error)
}
// Transporter specifies the transport layer.
type Transporter1 interface {
Send1(aduRequest []byte) (aduResponse []byte, err error)
}
type client struct {
packager Packager1 //接口作为结构体参数
transporter Transporter1
}
type ProtocolDataUnit struct {
FunctionCode byte
Data []byte
}
type Client interface {
}
func (mb *tcpPackager) Encode(pdu *ProtocolDataUnit) (adu []byte, err error) {
return
}
type tcpPackager struct {
// For synchronization between messages of server & client
transactionId uint32 /*用于服务器和客户端消息之间的同步*/
// Broadcast address is 0
SlaveId byte /*??0为广播*/
}
对象赋值给接口必须要注意的地方
或者这样
var a Test/*必须是指针对象，如果不是指针对象，那么方法必须是非指针方法*/
test(&a)//对象赋值给接口只要有一个方法是指针对象方法，就必须是传递指针对象