/
instance.go
94 lines (77 loc) · 2.31 KB
/
instance.go
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// 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 discovery
import (
"encoding/json"
"fmt"
"strings"
"github.com/pkg/errors"
"google.golang.org/grpc/resolver"
)
type Server struct {
Name string `json:"name"`
Addr string `json:"addr"` // 地址
Version string `json:"version"` // 版本
Weight int64 `json:"weight"` // 权重
}
func BuildPrefix(server Server) string {
if server.Version == "" {
return fmt.Sprintf("/%s/", server.Name)
}
return fmt.Sprintf("/%s/%s/", server.Name, server.Version)
}
func BuildRegisterPath(server Server) string {
return fmt.Sprintf("%s%s", BuildPrefix(server), server.Addr)
}
func ParseValue(value []byte) (Server, error) {
server := Server{}
if err := json.Unmarshal(value, &server); err != nil {
return server, errors.Wrap(err, "failed to unmarshal value")
}
return server, nil
}
func SplitPath(path string) (Server, error) {
server := Server{}
strs := strings.Split(path, "/")
if len(strs) == 0 {
return server, errors.Wrap(errors.New("invalid path"), "Split error")
}
server.Addr = strs[len(strs)-1]
return server, nil
}
// Exist helper function
func Exist(l []resolver.Address, addr resolver.Address) bool {
for i := range l {
if l[i].Addr == addr.Addr {
return true
}
}
return false
}
// Remove helper function
func Remove(s []resolver.Address, addr resolver.Address) ([]resolver.Address, bool) {
for i := range s {
if s[i].Addr == addr.Addr {
s[i] = s[len(s)-1]
return s[:len(s)-1], true
}
}
return nil, false
}
func BuildResolverUrl(app string) string {
return schema + ":///" + app
}