micro/broker/broker.go
Vasiliy Tolstov b4ccde2228
resurrect broker event (#26)
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2020-08-27 11:18:02 +03:00

40 lines
957 B
Go

// Package broker is an interface used for asynchronous messaging
package broker
// Broker is an interface used for asynchronous messaging.
type Broker interface {
Init(...Option) error
Options() Options
Address() string
Connect() error
Disconnect() error
Publish(topic string, m *Message, opts ...PublishOption) error
Subscribe(topic string, h Handler, opts ...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
Body []byte
Error error
}
// Subscriber is a convenience return type for the Subscribe method
type Subscriber interface {
Options() SubscribeOptions
Topic() string
Unsubscribe() error
}