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@@ -0,0 +1,128 @@
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+package handler
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+
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+import (
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+ "GtDataStore/app/cmd/events/internal/svc"
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+ "GtDataStore/app/model"
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+ "context"
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+ "encoding/json"
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+ "errors"
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+ "fmt"
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+ "metawant.greentech.com.cn/gaoyagang/gt-common/rabbitMQ"
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+ "strconv"
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+ "time"
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+)
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+
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+const (
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+ UF_BACKWASH = "EVENT:NOFITY:92:UF_BACKWASH"
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+
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+ RABBIT_EXCHANGE_NAME = "gt.dc.event"
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+)
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+
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+type (
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+ EventHandler struct {
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+ funcs map[string]func(message []byte) error
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+ consumer *rabbitMQ.Consumer
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+ svcCtx *svc.ServiceContext
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+ }
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+)
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+
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+func NewEventHandler(ctx *svc.ServiceContext) (*EventHandler, error) {
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+ consumer, err := rabbitMQ.NewConsumer(rabbitMQ.Exchange{
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+ Name: RABBIT_EXCHANGE_NAME,
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+ Type: "fanout",
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+ Dns: ctx.Config.RabbitMQ.Url,
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+ })
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+
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+ if err != nil {
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+ return nil, err
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+ }
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+
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+ eh := &EventHandler{
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+ funcs: make(map[string]func(message []byte) error),
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+ consumer: consumer,
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+ svcCtx: ctx,
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+ }
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+
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+ return eh, nil
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+}
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+
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+func (h *EventHandler) Start() {
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+ go h.consumer.Handler(UF_BACKWASH, h.adjustFilterCycle)
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+ fmt.Printf("listen event by: %s to uf.FilterEarly\n", UF_BACKWASH)
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+
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+ select {}
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+}
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+
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+func (h *EventHandler) adjustFilterCycle(message []byte) error {
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+ var entInfo multiEventInfo
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+ if err := json.Unmarshal(message, &entInfo); err != nil {
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+ return err
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+ }
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+ fmt.Printf("adjustFilterCycle Start")
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+
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+ // 获得一个时间窗口中的许可, 如果获得失败, 则说明事件重复, 不处理 600的是因为 超滤膜反洗时间不会超过600秒
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+ if h.canExec(entInfo.ProjectId, entInfo.DeviceCode, "adjustFilterCycle", "", 600*time.Second) == false {
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+ fmt.Printf("adjustFilterCycle 不可重复执行\n")
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+ return nil
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+ }
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+
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+ deviceInfo, err := h.getDeviceInfo(entInfo.ProjectId, entInfo.DeviceCode)
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+ if err != nil {
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+ return err
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+ }
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+
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+ filterCycleItem, ok := deviceInfo.Items["filter_cycle"]
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+ if ok == false {
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+ return errors.New("filter_cycle not config")
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+ }
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+ stepItem, ok := deviceInfo.Items["step"]
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+ if ok == false {
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+ return errors.New("step not config")
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+ }
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+
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+ filterCycleItemValue, ok := entInfo.NewValues[filterCycleItem.Item]
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+ if ok == false {
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+ return errors.New("filter_cycle value is empty")
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+ }
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+
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+ stepItemValue, ok := entInfo.NewValues[stepItem.Item]
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+
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+ filterCycle, err := strconv.ParseInt(filterCycleItemValue, 10, 64)
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+ step, err := strconv.ParseInt(stepItemValue, 10, 64)
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+ // 每进行一次反洗, 如果数据表中已经存在本周期的数据记录, 则adjust数值 +1
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+ // adjust意味着 自控系统与实际过滤周期数的差值
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+ if r, err := h.svcCtx.DcWorkingUf.FindLastByCycleAndStep(context.Background(), entInfo.ProjectId, entInfo.DeviceCode, filterCycle, step); err != nil || r == nil {
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+ // 没有查询到, 说明自控中该值已自增
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+ return nil
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+ } else {
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+ // 查询到了, 但可能是上一个CEB周期的数据, 也跳过
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+ // 判断是否为上一个周期的数据: 大于r.id的值, 并且存在着过滤数据
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+ if ls, _ := h.svcCtx.DcWorkingUf.FindForCycleAndStep(context.Background(), r.Id, entInfo.ProjectId, entInfo.DeviceCode, 0, step, 0, 1000, 1); len(ls) > 0 {
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+ return nil
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+ }
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+ }
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+
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+ // 通过上面的判断, 得知自控系统的filterCycle值阻塞了, 需要调整
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+ key := fmt.Sprintf("events:adjust:%d:%s:%s:%s", entInfo.ProjectId, entInfo.DeviceCode, "filter_cycle", "")
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+ h.svcCtx.Cache.Incr(context.Background(), key)
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+ h.svcCtx.Cache.Expire(context.Background(), key, 86400*time.Second)
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+
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+ return nil
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+}
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+
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+func (h *EventHandler) canExec(projectId int64, deviceCode, opName, salt string, expire time.Duration) bool {
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+ key := fmt.Sprintf("events:handler:%d:%s:%s:%s", projectId, deviceCode, opName, salt)
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+ if intCmd := h.svcCtx.Cache.Incr(context.Background(), key); intCmd.Val() == 1 {
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+ _ = h.svcCtx.Cache.Expire(context.Background(), key, expire)
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+ return true
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+ } else {
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+ // 缓存续期
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+ _ = h.svcCtx.Cache.Expire(context.Background(), key, expire)
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+ }
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+
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+ return false
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+}
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+
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+func (h *EventHandler) getDeviceInfo(projectId int64, deviceCode string) (*model.DcDeviceBind, error) {
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+ return h.svcCtx.DcDeviceBind.FindOneByProjectIdDeviceCode(context.Background(), projectId, deviceCode)
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+}
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gaoyagang