| // 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 zk |
| |
| import ( |
| "context" |
| "fmt" |
| "net/url" |
| "strings" |
| "time" |
| ) |
| |
| import ( |
| "github.com/dubbogo/go-zookeeper/zk" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-kubernetes/app/dubboctl/internal/registry" |
| ) |
| |
| type zkRegistry struct { |
| client *zk.Conn |
| } |
| |
| // NewZkRegistry creates a new zookeeper registry |
| func NewZkRegistry(addr string) (registry.Registry, error) { |
| addrList := strings.Split(addr, ",") |
| conn, _, err := zk.Connect(addrList, 5*time.Second, zk.WithLogInfo(false)) |
| if err != nil { |
| return nil, err |
| } |
| return &zkRegistry{ |
| client: conn, |
| }, nil |
| } |
| |
| func (z *zkRegistry) ListServices(ctx *context.Context) ([]string, error) { |
| children, _, err := z.client.Children("/") |
| if err != nil { |
| return nil, err |
| } |
| // if contain provider, then it is a service |
| var services []string |
| for _, firstChild := range children { |
| // first level is application name, like "dubbo" |
| secondChildren, _, err := z.client.Children("/" + firstChild) |
| if err != nil { |
| continue |
| } |
| for _, secondChild := range secondChildren { |
| // second level is service name, like "com.example.user.UserProvider" |
| thirdChildren, _, err := z.client.Children("/" + firstChild + "/" + secondChild) |
| if err != nil { |
| continue |
| } |
| // third level is "providers" or "consumers" |
| for _, thirdChild := range thirdChildren { |
| if strings.Contains(thirdChild, "providers") { |
| seviceName := fmt.Sprintf("application: %s, service: %s", firstChild, secondChild) |
| services = append(services, seviceName) |
| break |
| } |
| } |
| } |
| |
| } |
| return services, nil |
| } |
| |
| func (z *zkRegistry) ListInstances(ctx *context.Context, applicationName string, serviceName string) ([]string, error) { |
| // get all instances of the service |
| children, _, err := z.client.Children("/" + applicationName + "/" + serviceName) |
| if err != nil { |
| return nil, err |
| } |
| // get all instances |
| var instances []string |
| for _, child := range children { |
| if strings.EqualFold(child, "providers") { |
| serviceInstance, _, err := z.client.Children("/" + applicationName + "/" + serviceName + "/" + child) |
| if err != nil { |
| continue |
| } |
| for _, instance := range serviceInstance { |
| queryUnescape, err := url.QueryUnescape(instance) |
| if err != nil { |
| continue |
| } |
| u, err := url.Parse(queryUnescape) |
| if err != nil { |
| continue |
| } |
| instances = append(instances, u.Host) |
| } |
| } |
| } |
| return instances, nil |
| } |