aa

business/jxstore/event/event_tcp.go

@@ -53,7 +53,7 @@ func (t *TcpClient) handleConn(c net.Conn) {
 			}
 			return
 		}
-		//也可能是查状态的
+		//也可能是查状态的（openAPI外部查询，一次性的）
 		if err = json.Unmarshal(buffer[:n], &printStatus); err == nil {
 			fmt.Println("handleConn msg: ", string(buffer[:n]))
 			if printStatus != nil {
@@ -62,7 +62,7 @@ func (t *TcpClient) handleConn(c net.Conn) {
 				c.Close()
 			}
 		}
-		//看是心跳还是打印返回
+		//看是心跳还是打印回调
 		data := hex.EncodeToString(buffer[:n])
 		//证明是心跳
 		if strings.Contains(data, heartText) {
@@ -71,6 +71,13 @@ func (t *TcpClient) handleConn(c net.Conn) {
 			printNo = string(printNoData)
 			globals.SugarLogger.Debugf("handleConn printno :[%v]", printNo)
 			status := printStatus2JxStatus(data[len(data)-8 : len(data)-6])
+			//如果没在连接池里
+			//1、加到连接池中，不同的打印机no开不同的go
+			//2、初始化channel，每个打印机一个，放打印消息和打印回调消息
+			//3、读数据库里的待打印信息，放到打印channel中
+			//4、读打印channel并打印，并切等待回调channel中的消息
+			//5、修改数据库中打印机状态（没在连接池中说明是重新连接的）
+			//6、监听心跳时间，超过2分钟就clear掉
 			if t.Clients[printNo] == nil {
 				t.addConn(c, printNo, status)
 				t.buildCallBackMap(printNo)
@@ -83,15 +90,19 @@ func (t *TcpClient) handleConn(c net.Conn) {
 				changePrinterStatus(printNo, status)
 				t.HandleCheckTcpHeart(printNo)
 			} else {
+				//在加到连接池中已经更新了时间，所以放在else里
 				t.setPrintStatusTime(printNo)
 			}
+			//状态不一致再更新状态（可能缺纸了，过热了等）
 			if t.getPrintStatus(printNo) != status {
 				t.setPrintStatus(printNo, status)
 				changePrinterStatus(printNo, status)
 			}
 			globals.SugarLogger.Debugf("handleConn print model %v", utils.Format4Output(t.Clients[printNo], true))
-		} else if strings.Contains(data, printText) {
+		} else if strings.Contains(data, printText) { //打印回调
 			globals.SugarLogger.Debugf("handleConn print callback: %v", data)
+			//打印消息发送后，打印机会回调该条打印消息的状态（打印成功or失败，失败原因..）
+			//将回调的信息放到回调channel中，打印成功后再打印下一条消息
 			_, printNo = getCallbackMsgInfo(data)
 			t.addCallbackChan(printNo, data)
 		}
@@ -117,15 +128,17 @@ func (t *TcpClient) changePrintMsg(data string, orderNo int64, printNo string) (
 		status  int
 	)
 	//1、先找出打印机编号和订单序列号，这两个确定唯一一条消息?
+	//通过参数传进来
 	//2、打印成功改变打印表的状态
 	if strings.Contains(data, printSuccessText) {
-		//1e001802000150323032313036313530303030313000013c
+		//1e001802000150323032313036313530303030313000013c 成功消息例子
 		status = printMsgSuccess
 	} else {
 		//打印失败也改变状态并更新失败原因
 		status = printMsgFail
 		comment = printErrMap[data[12:14]]
 	}
+	//这里序号重复会有问题
 	if printMsgs, err := dao.GetPrintMsgNoPage(db, printNo, orderNo); err != nil {
 		globals.SugarLogger.Debugf("changePrintMsg err :[%v]", err)
 		return err
@@ -152,12 +165,18 @@ func (t *TcpClient) HandleTcpMessages(printNo string) {
 	globals.SugarLogger.Debugf("build HandleTcpMessages printNo: %s", printNo)
 	go func() {
 		for {
-			//一直读？
-			prints, _ := dao.GetPrintMsgs(db, printNo, []int{printMsgWait}, time.Now().Add(-time.Hour*3), time.Now(), offset, pageSize)
-			for _, printMsg := range prints {
-				printMsg.Status = printMsgAlreadyLoad
-				if _, err := dao.UpdateEntity(db, printMsg, "Status"); err == nil {
-					t.addMsgChan(printMsg)
+			select {
+			case <-timeoutChan:
+				return
+			default:
+				//一直读？
+				prints, _ := dao.GetPrintMsgs(db, printNo, []int{printMsgWait}, time.Now().Add(-time.Hour*3), time.Now(), offset, pageSize)
+				for _, printMsg := range prints {
+					printMsg.Status = printMsgAlreadyLoad
+					//先避免重复读再插到channel？
+					if _, err := dao.UpdateEntity(db, printMsg, "Status"); err == nil {
+						t.addMsgChan(printMsg)
+					}
 				}
 			}
 		}
@@ -175,7 +194,13 @@ func (t *TcpClient) doPrint(key string) (err error) {
 	go func() {
 		for {
 			select {
-			case printMsg := <-t.MsgMap[key]:
+			case <-timeoutChan:
+				return
+			default:
+				printMsg, ok := <-t.MsgMap[key]
+				if !ok {
+					return
+				}
 				var (
 					data []byte
 					c    net.Conn
@@ -184,6 +209,7 @@ func (t *TcpClient) doPrint(key string) (err error) {
 					if err = checkPrintMsg(db, printMsg); err == nil {
 						status := t.getPrintStatus(printMsg.PrintNo)
 						switch status {
+						//只有在线才打印内容
 						case printerStatusOnline:
 							if c = t.getPrintConn(printMsg.PrintNo); c != nil {
 								data, err = buildMsg(printMsg)
@@ -209,6 +235,7 @@ func (t *TcpClient) doPrint(key string) (err error) {
 								t.delConn(printMsg.PrintNo)
 							} else {
 								globals.SugarLogger.Debugf("handleTcpMessages success, data: %v", hex.EncodeToString(data))
+								//等待回调
 								dataStr := <-t.CallBackMap[printMsg.PrintNo]
 								a, b := getCallbackMsgInfo(dataStr)
 								t.changePrintMsg(dataStr, a, b)
@@ -233,6 +260,7 @@ func (t *TcpClient) HandleCheckTcpHeart(key string) {
 					if t.isExist(key) {
 						globals.SugarLogger.Debugf("HandleCheckTcpHeart del key,%v", key)
 						t.clear(key)
+						timeoutChan <- 1
 						return
 					}
 				}

business/jxstore/event/event_tcp_utils.go

@@ -68,6 +68,7 @@ const (
 	hexSignQrEnd    = "000a1b40"   //000a0a0a1b40
 	hexSignSound    = "1d6b40"
 
+	//起始标签
 	byteSignBR       = "3c62723e"         //换行
 	byteSignCenter   = "3c63656e7465723e" //居中
 	byteSignLeft     = "3c6c6566743e"     //居左
@@ -80,6 +81,7 @@ const (
 	byteSignQrRight  = "3c7172723e"
 	byteSignSound    = "3c736f756e643e"
 
+	//结束标签
 	byteSignCenterE   = "3c2f63656e7465723e" //居中
 	byteSignLeftE     = "3c2f6c6566743e"     //居左
 	byteSignRightE    = "3c2f72696768743e"   //居右
@@ -106,7 +108,7 @@ var (
 	regexpQrr   = regexp.MustCompile(byteSignQrRight + "(.*?)" + byteSignQrRightE)
 	regexpSound = regexp.MustCompile(byteSignSound + "(.*?)" + byteSignSoundE)
 
-	timeoutChan = make(chan int, 10)
+	timeoutChan = make(chan int)
 )
 
 type PrintInfo struct {
@@ -326,6 +328,7 @@ func changePrinterStatus(printNo string, status int) {
 	}
 }
 
+//按打印机方提供的文档来的
 func buildMsg(printMsg *model.PrintMsg) (data []byte, err error) {
 	var (
 		content   = printMsg.Content
@@ -349,6 +352,7 @@ func buildMsg(printMsg *model.PrintMsg) (data []byte, err error) {
 	return jxutils.Hextob(dataStr + check), err
 }
 
+//替换特殊字符，上面那个hextob转不了，先替换一下
 func replaceContentOther(content string) string {
 	return strings.ReplaceAll(content, "⃣️", " ")
 }