org.springframework.messaging.simp.config

Class MessageBrokerRegistry

java.lang.Object

org.springframework.messaging.simp.config.MessageBrokerRegistry

public class MessageBrokerRegistry
extends Object

A registry for configuring message broker options.

Since:

4.0

Author:

Rossen Stoyanchev, Sebastien Deleuze

Constructor Summary

Constructors

Constructor and Description
MessageBrokerRegistry(SubscribableChannel clientInboundChannel, MessageChannel clientOutboundChannel)

Method Summary

Modifier and Type	Method and Description
ChannelRegistration	configureBrokerChannel() Customize the channel used to send messages from the application to the message broker.
SimpleBrokerRegistration	enableSimpleBroker(String... destinationPrefixes) Enable a simple message broker and configure one or more prefixes to filter destinations targeting the broker (e.g.
StompBrokerRelayRegistration	enableStompBrokerRelay(String... destinationPrefixes) Enable a STOMP broker relay and configure the destination prefixes supported by the message broker.
protected Collection<String>	getApplicationDestinationPrefixes()
protected ChannelRegistration	getBrokerChannelRegistration()
protected PathMatcher	getPathMatcher()
protected SimpleBrokerMessageHandler	getSimpleBroker(SubscribableChannel brokerChannel)
protected StompBrokerRelayMessageHandler	getStompBrokerRelay(SubscribableChannel brokerChannel)
protected String	getUserDestinationPrefix()
MessageBrokerRegistry	setApplicationDestinationPrefixes(String... prefixes) Configure one or more prefixes to filter destinations targeting application annotated methods.
MessageBrokerRegistry	setPathMatcher(PathMatcher pathMatcher) Configure the PathMatcher to use to match the destinations of incoming messages to @MessageMapping and @SubscribeMapping methods.
MessageBrokerRegistry	setUserDestinationPrefix(String destinationPrefix) Configure the prefix used to identify user destinations.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MessageBrokerRegistry

public MessageBrokerRegistry(SubscribableChannel clientInboundChannel,
                             MessageChannel clientOutboundChannel)

Method Detail

enableSimpleBroker

public SimpleBrokerRegistration enableSimpleBroker(String... destinationPrefixes)

Enable a simple message broker and configure one or more prefixes to filter destinations targeting the broker (e.g. destinations prefixed with "/topic").

enableStompBrokerRelay

public StompBrokerRelayRegistration enableStompBrokerRelay(String... destinationPrefixes)

Enable a STOMP broker relay and configure the destination prefixes supported by the message broker. Check the STOMP documentation of the message broker for supported destinations.

configureBrokerChannel

public ChannelRegistration configureBrokerChannel()

Customize the channel used to send messages from the application to the message broker. By default, messages from the application to the message broker are sent synchronously, which means application code sending a message will find out if the message cannot be sent through an exception. However, this can be changed if the broker channel is configured here with task executor properties.

getBrokerChannelRegistration

protected ChannelRegistration getBrokerChannelRegistration()

setApplicationDestinationPrefixes

public MessageBrokerRegistry setApplicationDestinationPrefixes(String... prefixes)

Configure one or more prefixes to filter destinations targeting application annotated methods. For example destinations prefixed with "/app" may be processed by annotated methods while other destinations may target the message broker (e.g. "/topic", "/queue").

When messages are processed, the matching prefix is removed from the destination in order to form the lookup path. This means annotations should not contain the destination prefix.

Prefixes that do not have a trailing slash will have one automatically appended.

getApplicationDestinationPrefixes

protected Collection<String> getApplicationDestinationPrefixes()

setUserDestinationPrefix

public MessageBrokerRegistry setUserDestinationPrefix(String destinationPrefix)

Configure the prefix used to identify user destinations. User destinations provide the ability for a user to subscribe to queue names unique to their session as well as for others to send messages to those unique, user-specific queues.

For example when a user attempts to subscribe to "/user/queue/position-updates", the destination may be translated to "/queue/position-updatesi9oqdfzo" yielding a unique queue name that does not collide with any other user attempting to do the same. Subsequently when messages are sent to "/user/{username}/queue/position-updates", the destination is translated to "/queue/position-updatesi9oqdfzo".

The default prefix used to identify such destinations is "/user/".

getUserDestinationPrefix

protected String getUserDestinationPrefix()

setPathMatcher

public MessageBrokerRegistry setPathMatcher(PathMatcher pathMatcher)

Configure the PathMatcher to use to match the destinations of incoming messages to @MessageMapping and @SubscribeMapping methods.

By default AntPathMatcher is configured. However applications may provide an AntPathMatcher instance customized to use "." (commonly used in messaging) instead of "/" as path separator or provide a completely different PathMatcher implementation.

Note that the configured PathMatcher is only used for matching the portion of the destination after the configured prefix. For example given application destination prefix "/app" and destination "/app/price.stock.**", the message might be mapped to a controller with "price" and "stock.**" as its type and method-level mappings respectively.

When the simple broker is enabled, the PathMatcher configured here is also used to match message destinations when brokering messages.

Since:

4.1

getPathMatcher

protected PathMatcher getPathMatcher()

getSimpleBroker

protected SimpleBrokerMessageHandler getSimpleBroker(SubscribableChannel brokerChannel)

getStompBrokerRelay

protected StompBrokerRelayMessageHandler getStompBrokerRelay(SubscribableChannel brokerChannel)