修复wait长查询场景下配置项发生变化，更新缓存失败

server/pubsub/notifier/kv.go

@@ -1,14 +1,10 @@
 package notifier
 
 import (
-	"context"
 	"sync"
 	"time"
 
-	"github.com/apache/servicecomb-kie/pkg/model"
-	"github.com/apache/servicecomb-kie/server/cache"
 	"github.com/apache/servicecomb-kie/server/pubsub"
-	kvsvc "github.com/apache/servicecomb-kie/server/service/kv"
 	"github.com/go-chassis/openlog"
 	"github.com/hashicorp/serf/serf"
 )
@@ -75,30 +71,12 @@ func (h *KVHandler) FindTopicAndFire(ke *pubsub.KVChangeEvent) {
 			return true
 		}
 		if t.Match(ke) {
-			prepareCache(key.(string), t)
 			notifyAndRemoveObservers(value, ke)
 		}
 		return true
 	})
 }
 
-func prepareCache(topicName string, topic *pubsub.Topic) {
-	rev, kvs, err := kvsvc.ListKV(context.TODO(), &model.ListKVRequest{
-		Domain:  topic.DomainID,
-		Project: topic.Project,
-		Labels:  topic.Labels,
-		Match:   topic.MatchType,
-	})
-	if err != nil {
-		openlog.Error("can not query kvs:" + err.Error())
-	}
-	cache.CachedKV().Write(topicName, &cache.DBResult{
-		KVs: kvs,
-		Rev: rev,
-		Err: err,
-	})
-}
-
 func notifyAndRemoveObservers(value interface{}, ke *pubsub.KVChangeEvent) {
 	observers := value.(*sync.Map)
 	observers.Range(func(id, value interface{}) bool {

server/resource/v1/common.go

@@ -210,7 +210,7 @@ func getMatchPattern(rctx *restful.Context) string {
 	}
 	return m
 }
-func eventHappened(waitStr string, topic *pubsub.Topic) (bool, string, error) {
+func eventHappened(waitStr string, topic *pubsub.Topic, ctx context.Context) (bool, string, error) {
 	d, err := time.ParseDuration(waitStr)
 	if err != nil || d > common.MaxWait {
 		return false, "", errors.New(common.MsgInvalidWait)
@@ -230,6 +230,7 @@ func eventHappened(waitStr string, topic *pubsub.Topic) (bool, string, error) {
 		happened = false
 		pubsub.RemoveObserver(o.UUID, topic)
 	case <-o.Event:
+		prepareCache(topicName, topic, ctx)
 	}
 	return happened, topicName, nil
 }
@@ -307,3 +308,20 @@ func queryAndResponse(rctx *restful.Context, request *model.ListKVRequest) {
 		openlog.Error(err.Error())
 	}
 }
+
+func prepareCache(topicName string, topic *pubsub.Topic, ctx context.Context) {
+	rev, kvs, err := kvsvc.ListKV(ctx, &model.ListKVRequest{
+		Domain:  topic.DomainID,
+		Project: topic.Project,
+		Labels:  topic.Labels,
+		Match:   topic.MatchType,
+	})
+	if err != nil {
+		openlog.Error("can not query kvs:" + err.Error())
+	}
+	cache.CachedKV().Write(topicName, &cache.DBResult{
+		KVs: kvs,
+		Rev: rev,
+		Err: err,
+	})
+}

server/resource/v1/kv_resource.go

@@ -267,7 +267,7 @@ func watch(rctx *restful.Context, request *model.ListKVRequest, wait string) boo
 		Project:   request.Project,
 		MatchType: request.Match,
 		DomainID:  request.Domain,
-	})
+	}, rctx.Ctx)
 	if err != nil {
 		WriteErrResponse(rctx, config.ErrObserveEvent, err.Error())
 		return true