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registry.go
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registry.go
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// Licensed 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
//
// https://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.
//
// Original source: github.com/micro/go-micro/v3/registry/registry.go
// Package registry is the micro registry
package registry
import (
"errors"
)
var (
// DefaultRegistry implementation
DefaultRegistry Registry
// ErrNotFound error when GetService is called
ErrNotFound = errors.New("service not found")
// ErrWatcherStopped error when watcher is stopped
ErrWatcherStopped = errors.New("watcher stopped")
)
const (
// WildcardDomain indicates any domain
WildcardDomain = "*"
// DefaultDomain to use if none was provided in options
DefaultDomain = "micro"
)
// Registry provides an interface for service discovery
// and an abstraction over varying implementations
// {consul, etcd, zookeeper, ...}
type Registry interface {
Init(...Option) error
Options() Options
Register(*Service, ...RegisterOption) error
Deregister(*Service, ...DeregisterOption) error
GetService(string, ...GetOption) ([]*Service, error)
ListServices(...ListOption) ([]*Service, error)
Watch(...WatchOption) (Watcher, error)
String() string
}
type Service struct {
Name string `json:"name"`
Version string `json:"version"`
Metadata map[string]string `json:"metadata"`
Endpoints []*Endpoint `json:"endpoints"`
Nodes []*Node `json:"nodes"`
}
type Node struct {
Id string `json:"id"`
Address string `json:"address"`
Metadata map[string]string `json:"metadata"`
}
type Endpoint struct {
Name string `json:"name"`
Request *Value `json:"request"`
Response *Value `json:"response"`
Metadata map[string]string `json:"metadata"`
}
type Value struct {
Name string `json:"name"`
Type string `json:"type"`
Values []*Value `json:"values"`
}
// GetService from the registry
func GetService(service string) ([]*Service, error) {
return DefaultRegistry.GetService(service)
}
// ListServices in the registry
func ListServices() ([]*Service, error) {
return DefaultRegistry.ListServices()
}
// Watch the registry for updates
func Watch() (Watcher, error) {
return DefaultRegistry.Watch()
}