micro/registry/registry.go
Vasiliy Tolstov b7b28f6b9a lint
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2020-12-08 00:38:37 +03:00

91 lines
2.6 KiB
Go

// Package registry is an interface for service discovery
package registry
import (
"context"
"errors"
"github.com/unistack-org/micro/v3/metadata"
)
const (
// WildcardDomain indicates any domain
WildcardDomain = "*"
// DefaultDomain to use if none was provided in options
DefaultDomain = "micro"
)
var (
// DefaultRegistry is the global default registry
DefaultRegistry Registry = NewRegistry()
// ErrNotFound returned when GetService is called and no services found
ErrNotFound = errors.New("service not found")
// ErrWatcherStopped returned when when watcher is stopped
ErrWatcherStopped = errors.New("watcher stopped")
)
// Registry provides an interface for service discovery
// and an abstraction over varying implementations
// {consul, etcd, zookeeper, ...}
type Registry interface {
Init(...Option) error
Options() Options
Connect(context.Context) error
Disconnect(context.Context) error
Register(context.Context, *Service, ...RegisterOption) error
Deregister(context.Context, *Service, ...DeregisterOption) error
GetService(context.Context, string, ...GetOption) ([]*Service, error)
ListServices(context.Context, ...ListOption) ([]*Service, error)
Watch(context.Context, ...WatchOption) (Watcher, error)
String() string
}
// Service holds service registry info
type Service struct {
Name string `json:"name"`
Version string `json:"version"`
Metadata metadata.Metadata `json:"metadata"`
Endpoints []*Endpoint `json:"endpoints"`
Nodes []*Node `json:"nodes"`
}
// Node holds node registry info
type Node struct {
Id string `json:"id"`
Address string `json:"address"`
Metadata metadata.Metadata `json:"metadata"`
}
// Endpoint holds endpoint registry info
type Endpoint struct {
Name string `json:"name"`
Request *Value `json:"request"`
Response *Value `json:"response"`
Metadata metadata.Metadata `json:"metadata"`
}
// Value holds additional kv stuff
type Value struct {
Name string `json:"name"`
Type string `json:"type"`
Values []*Value `json:"values"`
}
// Option func signature
type Option func(*Options)
// RegisterOption option is used to register service
type RegisterOption func(*RegisterOptions)
// WatchOption option is used to watch service changes
type WatchOption func(*WatchOptions)
// DeregisterOption option is used to deregister service
type DeregisterOption func(*DeregisterOptions)
// GetOption option is used to get service
type GetOption func(*GetOptions)
// ListOption option is used to list services
type ListOption func(*ListOptions)