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 Summary

Modifier and Type	Method	Description
<M> reactor.core.publisher.Mono<String>	addListener(Class<M> type, MessageListener<M> listener)	Subscribes to this topic.
reactor.core.publisher.Mono<Integer>	countSubscribers()	Returns amount of subscribers to this topic across all Redisson instances.
<M> reactor.core.publisher.Flux<M>	getMessages(Class<M> type)	Returns continues stream of published messages.
reactor.core.publisher.Mono<Long>	publish(Object message)	Publish the message to all subscribers of this topic asynchronously.
reactor.core.publisher.Mono<Void>	removeAllListeners()	Removes all listeners attached to this topic instance
reactor.core.publisher.Mono<Void>	removeListener(String... listenerIds)	Removes the listener by id attached to this topic instance
reactor.core.publisher.Mono<Long>	size()	Amount of messages stored in Redis Stream object.

Methods inherited from interface org.redisson.api.RExpirableReactive

clearExpire, expire, expire, expire, expireAt, expireAt, expireIfGreater, expireIfGreater, expireIfLess, expireIfLess, expireIfNotSet, expireIfNotSet, expireIfSet, expireIfSet, getExpireTime, remainTimeToLive

Methods inherited from interface org.redisson.api.RObjectReactive

addListener, copy, delete, dump, getCodec, getIdleTime, getName, isExists, migrate, move, removeListener, rename, renamenx, restore, restore, restoreAndReplace, restoreAndReplace, sizeInMemory, touch, unlink

Method Details

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.

Though messages broadcasted across all topic instances, listener is attached to this topic instance.

Watchdog is started when listener was registered.

Type Parameters:

M - - type of message

Parameters:

type - - type of message

listener - for messages

Returns:

id of listener attached to this topic instance

See Also:

• Config.setReliableTopicWatchdogTimeout(long)
• MessageListener

removeListener

reactor.core.publisher.Mono<Void> removeListener(String... listenerIds)

Removes the listener by id attached to this topic instance

Parameters:

listenerIds - - listener ids

Returns:

void

removeAllListeners

reactor.core.publisher.Mono<Void> removeAllListeners()

Removes all listeners attached to this topic instance

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