close github.com/unistack-org/micro-roadmap/issues/26 (#3) Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
// Package broker is an interface used for asynchronous messaging
|
|
package broker
|
|
|
|
import "context"
|
|
|
|
var (
|
|
DefaultBroker Broker = &NoopBroker{opts: NewOptions()}
|
|
)
|
|
|
|
// Broker is an interface used for asynchronous messaging.
|
|
type Broker interface {
|
|
Init(...Option) error
|
|
Options() Options
|
|
Address() string
|
|
Connect(context.Context) error
|
|
Disconnect(context.Context) error
|
|
Publish(context.Context, string, *Message, ...PublishOption) error
|
|
Subscribe(context.Context, string, Handler, ...SubscribeOption) (Subscriber, error)
|
|
String() string
|
|
}
|
|
|
|
// Handler is used to process messages via a subscription of a topic.
|
|
type Handler func(Event) error
|
|
|
|
// Event is given to a subscription handler for processing
|
|
type Event interface {
|
|
Topic() string
|
|
Message() *Message
|
|
Ack() error
|
|
Error() error
|
|
}
|
|
|
|
// Message is used to transfer data
|
|
type Message struct {
|
|
Header map[string]string // contains message metadata
|
|
Body []byte // contains message body
|
|
}
|
|
|
|
// Subscriber is a convenience return type for the Subscribe method
|
|
type Subscriber interface {
|
|
Options() SubscribeOptions
|
|
Topic() string
|
|
Unsubscribe(context.Context) error
|
|
}
|