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package broadcast
import "encoding/json"
// Subscriber defines the ability to operate as message passing broker.
type Subscriber interface {
// Subscribe broker to one or multiple topics.
Subscribe(upstream chan *Message, topics ...string) error
// SubscribePattern broker to pattern.
SubscribePattern(upstream chan *Message, pattern string) error
// Unsubscribe broker from one or multiple topics.
Unsubscribe(upstream chan *Message, topics ...string) error
// UnsubscribePattern broker from pattern.
UnsubscribePattern(upstream chan *Message, pattern string) error
}
type Storage interface {
Store(topics ...string)
StorePattern(pattern string)
}
type Publisher interface {
// Publish one or multiple Channel.
Publish(messages ...*Message) error
}
// Message represent single message.
type Message struct {
// Topic message been pushed into.
Topic string `json:"topic"`
// Payload to be broadcasted. Must be valid json when transferred over RPC.
Payload json.RawMessage `json:"payload"`
}
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