micro/broker/broker.go

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// Package broker is an interface used for asynchronous messaging
package broker
var (
DefaultBroker Broker
)
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// Broker is an interface used for asynchronous messaging.
type Broker interface {
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Init(...Option) error
Options() Options
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Address() string
Connect() error
Disconnect() error
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Publish(topic string, m *Message, opts ...PublishOption) error
Subscribe(topic string, h Handler, opts ...SubscribeOption) (Subscriber, error)
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String() string
}
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// 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
}