AlexStocks commented on a change in pull request #1187: URL: https://github.com/apache/dubbo-go/pull/1187#discussion_r627500030
########## File path: cluster/router/v3router/router_chain.go ########## @@ -0,0 +1,247 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package v3router + +import ( + "encoding/json" + "fmt" + "io" + "strings" +) + +import ( + "gopkg.in/yaml.v2" +) + +import ( + "github.com/apache/dubbo-go/cluster/router" + "github.com/apache/dubbo-go/cluster/router/v3router/k8s_api" + "github.com/apache/dubbo-go/common" + "github.com/apache/dubbo-go/common/logger" + "github.com/apache/dubbo-go/config" + "github.com/apache/dubbo-go/config_center" + "github.com/apache/dubbo-go/protocol" + "github.com/apache/dubbo-go/remoting" +) + +// RouterChain contains all uniform router logic +// it has UniformRouter list, +type RouterChain struct { + routers []*UniformRouter + virtualServiceConfigBytes []byte + destinationRuleConfigBytes []byte + notify chan struct{} +} + +// NewUniformRouterChain return +func NewUniformRouterChain(virtualServiceConfig, destinationRuleConfig []byte, notify chan struct{}) (router.PriorityRouter, error) { + fromFileConfig := true + uniformRouters, err := parseFromConfigToRouters(virtualServiceConfig, destinationRuleConfig, notify) + if err != nil { + fromFileConfig = false + logger.Warnf("parse router config form local file failed, error = %+v", err) + } + r := &RouterChain{ + virtualServiceConfigBytes: virtualServiceConfig, + destinationRuleConfigBytes: destinationRuleConfig, + routers: uniformRouters, + notify: notify, + } + if err := k8s_api.SetK8sEventListener(r); err != nil { + logger.Warnf("try listen K8s router config failed, error = %+v", err) + if !fromFileConfig { + panic("No config file from both local file and k8s") + } + } + return r, nil +} + +// Route route invokers using RouterChain's routers one by one +func (r *RouterChain) Route(invokers []protocol.Invoker, url *common.URL, invocation protocol.Invocation) []protocol.Invoker { + for _, v := range r.routers { + invokers = v.Route(invokers, url, invocation) + } + return invokers +} + +func (r *RouterChain) Process(event *config_center.ConfigChangeEvent) { + logger.Debugf("on processed event = %+v\n", *event) + if event.ConfigType == remoting.EventTypeAdd || event.ConfigType == remoting.EventTypeUpdate { + switch event.Key { + case k8s_api.VirtualServiceEventKey: + logger.Debug("virtul service event") + newVSValue, ok := event.Value.(*config.VirtualServiceConfig) + if !ok { + logger.Error("event.Value assertion error") + return + } + + newVSJsonValue, ok := newVSValue.ObjectMeta.Annotations["kubectl.kubernetes.io/last-applied-configuration"] + if !ok { + logger.Error("newVSValue.ObjectMeta.Annotations has no key named kubectl.kubernetes.io/last-applied-configuration") + return + } + logger.Debugf("json file = %v\n", newVSJsonValue) + newVirtualServiceConfig := &config.VirtualServiceConfig{} + if err := json.Unmarshal([]byte(newVSJsonValue), newVirtualServiceConfig); err != nil { + logger.Error("on process json data unmarshal error = ", err) + return + } + newVirtualServiceConfig.YamlAPIVersion = newVirtualServiceConfig.APIVersion + newVirtualServiceConfig.YamlKind = newVirtualServiceConfig.Kind + newVirtualServiceConfig.MetaData.Name = newVirtualServiceConfig.ObjectMeta.Name + fmt.Printf("get event after asseration = %+v\n", newVirtualServiceConfig) + data, err := yaml.Marshal(newVirtualServiceConfig) + if err != nil { + logger.Error("Process change of virtual service: event.Value marshal error:", err) + return + } + r.routers, err = parseFromConfigToRouters(data, r.destinationRuleConfigBytes, r.notify) + if err != nil { + logger.Error("Process change of virtual service: parseFromConfigToRouters:", err) + return + } + case k8s_api.DestinationRuleEventKey: + logger.Debug("handling dest rule event") + newDRValue, ok := event.Value.(*config.DestinationRuleConfig) + if !ok { + logger.Error("event.Value assertion error") + return + } + + newDRJsonValue, ok := newDRValue.ObjectMeta.Annotations["kubectl.kubernetes.io/last-applied-configuration"] + if !ok { + logger.Error("newVSValue.ObjectMeta.Annotations has no key named kubectl.kubernetes.io/last-applied-configuration") + return + } + newDestRuleConfig := &config.DestinationRuleConfig{} + if err := json.Unmarshal([]byte(newDRJsonValue), newDestRuleConfig); err != nil { + logger.Error("on process json data unmarshal error = ", err) + return + } + newDestRuleConfig.YamlAPIVersion = newDestRuleConfig.APIVersion + newDestRuleConfig.YamlKind = newDestRuleConfig.Kind + newDestRuleConfig.MetaData.Name = newDestRuleConfig.ObjectMeta.Name + fmt.Printf("get event after asseration = %+v\n", newDestRuleConfig) Review comment: logger.Debugf -- This is an automated message from the Apache Git Service. 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