Example usage for org.springframework.messaging.simp.user UserDestinationResult getTargetDestinations

Introduction

In this page you can find the example usage for org.springframework.messaging.simp.user UserDestinationResult getTargetDestinations.

Prototype

public Set<String> getTargetDestinations() 

Source Link

Document

The target destinations that the source destination was translated to, one per active user session, e.g.

Usage

From source file:org.springframework.messaging.simp.user.UserDestinationMessageHandler.java

@Override
public void handleMessage(Message<?> message) throws MessagingException {
    Message<?> messageToUse = message;
    if (this.broadcastHandler != null) {
        messageToUse = this.broadcastHandler.preHandle(message);
        if (messageToUse == null) {
            return;
        }/*w  ww  .  j a v a 2  s .  c o  m*/
    }

    UserDestinationResult result = this.destinationResolver.resolveDestination(messageToUse);
    if (result == null) {
        return;
    }

    if (result.getTargetDestinations().isEmpty()) {
        if (logger.isTraceEnabled()) {
            logger.trace("No active sessions for user destination: " + result.getSourceDestination());
        }
        if (this.broadcastHandler != null) {
            this.broadcastHandler.handleUnresolved(messageToUse);
        }
        return;
    }

    SimpMessageHeaderAccessor accessor = SimpMessageHeaderAccessor.wrap(messageToUse);
    initHeaders(accessor);
    accessor.setNativeHeader(SimpMessageHeaderAccessor.ORIGINAL_DESTINATION, result.getSubscribeDestination());
    accessor.setLeaveMutable(true);

    messageToUse = MessageBuilder.createMessage(messageToUse.getPayload(), accessor.getMessageHeaders());
    if (logger.isTraceEnabled()) {
        logger.trace("Translated " + result.getSourceDestination() + " -> " + result.getTargetDestinations());
    }
    for (String target : result.getTargetDestinations()) {
        this.messagingTemplate.send(target, messageToUse);
    }
}

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