From 8dfb8feb32bb5e4e460e23dcde42612a26fa2bcb Mon Sep 17 00:00:00 2001
From: zhangqian <zhangqian@123.com>
Date: 星期日, 27 八月 2023 01:11:28 +0800
Subject: [PATCH] fix
---
pkg/plc/plc4x.go | 78 ++++++++++++++++++++++++++++++++-------
1 files changed, 64 insertions(+), 14 deletions(-)
diff --git a/pkg/plc/plc4x.go b/pkg/plc/plc4x.go
index 3e6c4a6..d38ac67 100644
--- a/pkg/plc/plc4x.go
+++ b/pkg/plc/plc4x.go
@@ -1,22 +1,67 @@
package plc
import (
+ "context"
"errors"
"fmt"
apiModel "github.com/apache/plc4x/plc4go/pkg/api/model"
+ "sync"
+ "time"
plc4go "github.com/apache/plc4x/plc4go/pkg/api"
"github.com/apache/plc4x/plc4go/pkg/api/drivers"
"github.com/apache/plc4x/plc4go/pkg/api/transports"
)
-func NewModbusConnection(ipAddr string) (plc4go.PlcConnection, error) {
+type ConnectionManager struct {
+ connections map[string]plc4go.PlcConnection
+ mu sync.Mutex
+}
+
+func NewPlcConnectionManager() *ConnectionManager {
+ return &ConnectionManager{
+ connections: make(map[string]plc4go.PlcConnection),
+ }
+}
+
+func (cm *ConnectionManager) GetConnection(address string) (plc4go.PlcConnection, bool) {
+ cm.mu.Lock()
+ defer cm.mu.Unlock()
+
+ conn, ok := cm.connections[address]
+ return conn, ok
+}
+
+var connectionManager = NewPlcConnectionManager()
+
+func (cm *ConnectionManager) AddConnection(address string, connection plc4go.PlcConnection) {
+ cm.mu.Lock()
+ defer cm.mu.Unlock()
+
+ cm.connections[address] = connection
+}
+func GetModbusConnection(ipAddr string) (plc4go.PlcConnection, error) {
+ if conn, ok := connectionManager.GetConnection(ipAddr); ok {
+ if conn.IsConnected() {
+ return conn, nil
+ }
+ }
+ // 鍒涘缓涓�涓笂涓嬫枃锛屽苟璁剧疆 5 绉掕秴鏃�
+ ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+ defer cancel()
+ conn, err := NewGetModbusConnection(ctx, ipAddr)
+ if err != nil {
+ return nil, err
+ }
+ connectionManager.AddConnection(ipAddr, conn)
+ return conn, nil
+}
+
+func NewGetModbusConnection(ctx context.Context, ipAddr string) (plc4go.PlcConnection, error) {
// 鍒涘缓椹卞姩绠＄悊鍣�
driverManager := plc4go.NewPlcDriverManager()
-
// 娉ㄥ唽TCP浼犺緭
transports.RegisterTcpTransport(driverManager)
-
// 娉ㄥ唽椹卞姩
//drivers.RegisterKnxDriver(driverManager)
drivers.RegisterModbusTcpDriver(driverManager)
@@ -25,21 +70,24 @@
connectionString := fmt.Sprintf("modbus-tcp://%s", ipAddr)
connectionRequestChanel := driverManager.GetConnection(connectionString)
- // 绛夊緟杩炴帴鍝嶅簲
- connectionResult := <-connectionRequestChanel
-
- // 鍒ゆ柇鏄惁杩炴帴鎴愬姛
- if err := connectionResult.GetErr(); err != nil {
- return nil, err
+ // 绛夊緟杩炴帴鍝嶅簲锛屽悓鏃惰�冭檻涓婁笅鏂囩殑瓒呮椂
+ select {
+ case connectionResult := <-connectionRequestChanel:
+ if err := connectionResult.GetErr(); err != nil {
+ return nil, err
+ }
+ return connectionResult.GetConnection(), nil
+ case <-ctx.Done():
+ return nil, ctx.Err()
}
-
- return connectionResult.GetConnection(), nil
}
+
func ReadHoldingRegisterSingle(connection plc4go.PlcConnection, address int) ([]byte, error) {
+ tag := fmt.Sprintf("tag:%v", address)
tagAddress := fmt.Sprintf("holding-register:%d:UINT", address)
// 璇绘ā寮�
- readRequest, err := connection.ReadRequestBuilder().AddTagAddress("tag", tagAddress).Build()
+ readRequest, err := connection.ReadRequestBuilder().AddTagAddress(tag, tagAddress).Build()
if err != nil {
fmt.Printf("preparing read-request:%s\n", err.Error())
return nil, err
@@ -65,10 +113,11 @@
}
func ReadHoldingRegisterList(connection plc4go.PlcConnection, address, length int) ([]byte, error) {
+ tag := fmt.Sprintf("tag:%v:%v", address, length)
tagAddress := fmt.Sprintf("holding-register:%d:UINT[%d]", address, length)
// 璇绘ā寮�
- readRequest, err := connection.ReadRequestBuilder().AddTagAddress("tag", tagAddress).Build()
+ readRequest, err := connection.ReadRequestBuilder().AddTagAddress(tag, tagAddress).Build()
if err != nil {
fmt.Printf("preparing read-request:%s\n", err.Error())
return nil, err
@@ -107,10 +156,11 @@
}
func WriteHoldingRegister(connection plc4go.PlcConnection, address int, value any) (string, error) {
+ tag := fmt.Sprintf("tag:%v:w", address)
tagAddress := fmt.Sprintf("holding-register:%d:UINT", address)
// 鍐欐ā寮�
- writeRequest, err := connection.WriteRequestBuilder().AddTagAddress("tag", tagAddress, value).Build()
+ writeRequest, err := connection.WriteRequestBuilder().AddTagAddress(tag, tagAddress, value).Build()
if err != nil {
fmt.Printf("preparing read-request:%s\n", err.Error())
return "", err
--
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