70 lines
1.6 KiB
Go
70 lines
1.6 KiB
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
|
|
Connect() error
|
|
Disconnect() error
|
|
Publish(string, *Message, ...PublishOption) error
|
|
Subscribe(string, Handler, ...SubscribeOption) (Subscriber, error)
|
|
String() string
|
|
}
|
|
|
|
// Handler is used to process messages via a subscription of a topic.
|
|
// The handler is passed a publication interface which contains the
|
|
// message and optional Ack method to acknowledge receipt of the message.
|
|
type Handler func(Publication) error
|
|
|
|
type Message struct {
|
|
Header map[string]string
|
|
Body []byte
|
|
}
|
|
|
|
// Publication is given to a subscription handler for processing
|
|
type Publication interface {
|
|
Topic() string
|
|
Message() *Message
|
|
Ack() error
|
|
}
|
|
|
|
// Subscriber is a convenience return type for the Subscribe method
|
|
type Subscriber interface {
|
|
Options() SubscribeOptions
|
|
Topic() string
|
|
Unsubscribe() error
|
|
}
|
|
|
|
var (
|
|
DefaultBroker Broker = newHttpBroker()
|
|
)
|
|
|
|
func NewBroker(opts ...Option) Broker {
|
|
return newHttpBroker(opts...)
|
|
}
|
|
|
|
func Init(opts ...Option) error {
|
|
return DefaultBroker.Init(opts...)
|
|
}
|
|
|
|
func Connect() error {
|
|
return DefaultBroker.Connect()
|
|
}
|
|
|
|
func Disconnect() error {
|
|
return DefaultBroker.Disconnect()
|
|
}
|
|
|
|
func Publish(topic string, msg *Message, opts ...PublishOption) error {
|
|
return DefaultBroker.Publish(topic, msg, opts...)
|
|
}
|
|
|
|
func Subscribe(topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
|
|
return DefaultBroker.Subscribe(topic, handler, opts...)
|
|
}
|
|
|
|
func String() string {
|
|
return DefaultBroker.String()
|
|
}
|