add ai cache plugin (#1010)

plugins/wasm-go/pkg/wrapper/cluster_wrapper.go

@@ -151,3 +151,20 @@ func (c ConsulCluster) HostName() string {
 	}
 	return c.ServiceName
 }
+
+type FQDNCluster struct {
+	FQDN string
+	Host string
+	Port int64
+}
+
+func (c FQDNCluster) ClusterName() string {
+	return fmt.Sprintf("outbound|%d||%s", c.Port, c.FQDN)
+}
+
+func (c FQDNCluster) HostName() string {
+	if c.Host != "" {
+		return c.Host
+	}
+	return c.FQDN
+}

plugins/wasm-go/pkg/wrapper/redis_wrapper.go

@@ -142,7 +142,9 @@ func RedisCall(cluster Cluster, respQuery []byte, callback RedisResponseCallback
 					}
 				}
 			}
-			callback(responseValue)
+			if callback != nil {
+				callback(responseValue)
+			}
 		})
 	if err != nil {
 		proxywasm.LogCriticalf("redis call failed, request-id: %s, error: %v", requestID, err)