40 lines
1.0 KiB
Go
40 lines
1.0 KiB
Go
// Package broker is an interface used for asynchronous messaging
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package broker
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// Broker is an interface used for asynchronous messaging.
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type Broker interface {
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Init(...Option) error
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Options() Options
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Address() string
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Connect() error
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Disconnect() error
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Publish(topic string, m *Message, opts ...PublishOption) error
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Subscribe(topic string, h Handler, opts ...SubscribeOption) (Subscriber, error)
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String() string
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}
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// Handler is used to process messages via a subscription of a topic.
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// The handler is passed a publication interface which contains the
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// message and optional Ack method to acknowledge receipt of the message.
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type Handler func(Event) error
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type Message struct {
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Header map[string]string
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Body []byte
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}
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// Event is given to a subscription handler for processing
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type Event interface {
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Topic() string
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Message() *Message
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Ack() error
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Error() error
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}
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// Subscriber is a convenience return type for the Subscribe method
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type Subscriber interface {
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Options() SubscribeOptions
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Topic() string
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Unsubscribe() error
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}
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