From 7692fa5336dc7db668306ea372a4516b5609776f Mon Sep 17 00:00:00 2001
From: zhangqian <zhangqian@123.com>
Date: 星期一, 23 十月 2023 21:21:55 +0800
Subject: [PATCH] 连接状态维护支持串口

---
 service/plc.go |   52 +++++++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 47 insertions(+), 5 deletions(-)

diff --git a/service/plc.go b/service/plc.go
index f73ec58..1d9d5e9 100644
--- a/service/plc.go
+++ b/service/plc.go
@@ -13,6 +13,7 @@
 	"errors"
 	"fmt"
 	"github.com/spf13/cast"
+	"sync/atomic"
 )
 
 func PlcWrite(plcConfig *model.DevicePlc, fieldType constvar.PlcStartAddressType, channel int32, value interface{}) (err error) {
@@ -57,6 +58,7 @@
 	var (
 		ipAddr string
 	)
+	defer dealErr(err)
 	if plcConfig.Method == constvar.PlcMethodModbusTCP {
 		ipAddr = fmt.Sprintf("%s:%v", plcConfig.Address, plcConfig.Port)
 		err = WriteHoldingRegister(ipAddr, address, value)
@@ -81,6 +83,7 @@
 	var (
 		ipAddr string
 	)
+	defer dealErr(err)
 	if plcConfig.Method == constvar.PlcMethodModbusTCP {
 		ipAddr = fmt.Sprintf("%s:%v", plcConfig.Address, plcConfig.Port)
 		value, err := ReadHoldingRegister(ipAddr, address, dataLength)
@@ -144,11 +147,50 @@
 }
 
 func PlcIsConnect() bool {
-	if conf.Conf.PLC.Package == constvar.PlcPackageApache {
-		return apacheplc4x.IsConnect()
-	} else if conf.Conf.PLC.Package == constvar.PlcPackageApacheLongConnection {
-		return false
+	return IsConnect()
+	//if conf.Conf.PLC.Package == constvar.PlcPackageApache {
+	//	return apacheplc4x.IsConnect()
+	//} else if conf.Conf.PLC.Package == constvar.PlcPackageApacheLongConnection {
+	//	return false
+	//} else {
+	//	return modbusx.IsConnect()
+	//}
+}
+
+func dealErr(err error) {
+	if err != nil {
+		FailureRemainingOpportunitiesDecr() //鍑忓皯澶辫触鍓╀綑鏈轰細
 	} else {
-		return modbusx.IsConnect()
+		FailureRemainingOpportunitiesReset() //閲嶇疆澶辫触鍓╀綑鏈轰細
 	}
 }
+
+var connectionStatus atomic.Bool
+
+var failureRemainingOpportunities atomic.Int64
+
+const (
+	defaultFailureRemainingOpportunities = 20
+)
+
+func IsConnect() bool {
+	return connectionStatus.Load()
+}
+
+func FailureRemainingOpportunitiesDecr() {
+	newValue := failureRemainingOpportunities.Add(-1)
+	if newValue <= 0 {
+		connectionStatus.Store(false)
+	}
+	return
+}
+
+func FailureRemainingOpportunitiesReset() {
+	if failureRemainingOpportunities.Load() < defaultFailureRemainingOpportunities {
+		failureRemainingOpportunities.Store(defaultFailureRemainingOpportunities)
+	}
+	if connectionStatus.Load() == false {
+		connectionStatus.Store(true)
+	}
+	return
+}

--
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