60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package register
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import "time"
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// Watcher is an interface that returns updates
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// about services within the register.
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type Watcher interface {
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// Next is a blocking call
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Next() (*Result, error)
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// Stop stops the watcher
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Stop()
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}
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// Result is returned by a call to Next on
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// the watcher. Actions can be create, update, delete
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type Result struct {
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// Service holds register service
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Service *Service `json:"service,omitempty"`
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// Action holds the action
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Action EventType `json:"action,omitempty"`
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}
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// EventType defines register event type
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type EventType int
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const (
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// EventCreate is emitted when a new service is registered
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EventCreate EventType = iota
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// EventDelete is emitted when an existing service is deregistered
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EventDelete
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// EventUpdate is emitted when an existing service is updated
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EventUpdate
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)
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// String returns human readable event type
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func (t EventType) String() string {
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switch t {
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case EventCreate:
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return "create"
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case EventDelete:
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return "delete"
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case EventUpdate:
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return "update"
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default:
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return "unknown"
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}
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}
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// Event is register event
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type Event struct {
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// Timestamp is event timestamp
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Timestamp time.Time `json:"timestamp,omitempty"`
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// Service is register service
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Service *Service `json:"service,omitempty"`
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// ID is register id
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ID string `json:"id,omitempty"`
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// Type defines type of event
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Type EventType `json:"type,omitempty"`
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}
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