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