Package org.redisson.api

Interface RReliableTopic

All Superinterfaces:

RExpirable, RExpirableAsync, RObject, RObjectAsync, RReliableTopicAsync

All Known Implementing Classes:

RedissonReliableTopic

public interface RReliableTopic
extends RExpirable, RReliableTopicAsync

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> String	addListener(Class<M> type, MessageListener<M> listener)	Subscribes to this topic.
int	countListeners()	Returns amount of registered listeners to this topic instance
int	countSubscribers()	Returns amount of subscribers to this topic across all Redisson instances.
long	publish(Object message)	Publish the message to all subscribers of this topic asynchronously.
void	removeAllListeners()	Removes all listeners attached to this topic instance
void	removeListener(String... listenerIds)	Removes the listener by id attached to this topic instance
long	size()	Amount of messages stored in Redis Stream object.

Methods inherited from interface org.redisson.api.RExpirable

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

Methods inherited from interface org.redisson.api.RExpirableAsync

clearExpireAsync, expireAsync, expireAsync, expireAsync, expireAtAsync, expireAtAsync, expireIfGreaterAsync, expireIfGreaterAsync, expireIfLessAsync, expireIfLessAsync, expireIfNotSetAsync, expireIfNotSetAsync, expireIfSetAsync, expireIfSetAsync, getExpireTimeAsync, remainTimeToLiveAsync

Methods inherited from interface org.redisson.api.RObject

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

Methods inherited from interface org.redisson.api.RObjectAsync

addListenerAsync, copyAsync, deleteAsync, dumpAsync, getIdleTimeAsync, isExistsAsync, migrateAsync, moveAsync, removeListenerAsync, renameAsync, renamenxAsync, restoreAndReplaceAsync, restoreAndReplaceAsync, restoreAsync, restoreAsync, sizeInMemoryAsync, touchAsync, unlinkAsync

Methods inherited from interface org.redisson.api.RReliableTopicAsync

addListenerAsync, countSubscribersAsync, publishAsync, removeAllListenersAsync, removeListenerAsync, sizeAsync

Method Details

size

long size()

Amount of messages stored in Redis Stream object.

Returns:

amount of messages

publish

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> 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

void removeListener(String... listenerIds)

Removes the listener by id attached to this topic instance

Parameters:

listenerIds - - listener ids

removeAllListeners

void removeAllListeners()

Removes all listeners attached to this topic instance

countListeners

int countListeners()

Returns amount of registered listeners to this topic instance

Returns:

amount of listeners

countSubscribers

int countSubscribers()

Returns amount of subscribers to this topic across all Redisson instances. Each subscriber may have multiple listeners.

Returns:

amount of subscribers