Package org.redisson.api

Interface RReliableTopicReactive

  • All Superinterfaces:
    RExpirableReactive, RObjectReactive
    public interface RReliableTopicReactive
extends RExpirableReactive
    Reactive interface for Reliable topic based on Redis Stream object.

    Dedicated Redis connection is allocated per instance (subscriber) of this object. Messages are delivered to all listeners attached to the same Redis setup.

    Requires Redis 5.0.0 and higher.

    Author:
    Nikita Koksharov

    • Method Detail

      • size

        reactor.core.publisher.Mono<Long> size()
        Amount of messages stored in Redis Stream object.
        Returns:
        amount of messages

      • publish

        reactor.core.publisher.Mono<Long> publish​(Object message)
        Publish the message to all subscribers of this topic asynchronously. Each subscriber may have multiple listeners.
        Parameters:
        message - to send
        Returns:
        number of subscribers that received the message

      • addListener

        <M> reactor.core.publisher.Mono<String> addListener​(Class<M> type,
                                                    MessageListener<M> listener)
        Subscribes to this topic. MessageListener.onMessage method is called when any message is published on this topic.

        Watchdog is started when listener was registered.

        Type Parameters:
        M - - type of message
        Parameters:
        type - - type of message
        listener - for messages
        Returns:
        locally unique listener id
        See Also:
        Config.setReliableTopicWatchdogTimeout(long), MessageListener

      • removeListener

        reactor.core.publisher.Mono<Void> removeListener​(String... listenerIds)
        Removes the listener by id for listening this topic
        Parameters:
        listenerIds - - listener ids
        Returns:
        void

      • removeAllListeners

        reactor.core.publisher.Mono<Void> removeAllListeners()
        Removes all listeners from this topic

      • countSubscribers

        reactor.core.publisher.Mono<Integer> countSubscribers()
        Returns amount of subscribers to this topic across all Redisson instances. Each subscriber may have multiple listeners.
        Returns:
        amount of subscribers

      • getMessages

        <M> reactor.core.publisher.Flux<M> getMessages​(Class<M> type)
        Returns continues stream of published messages.
        Type Parameters:
        M - type of message
        Parameters:
        type - - type of message to listen
        Returns:
        stream of messages