Example usage for org.springframework.messaging.simp SimpAttributes SimpAttributes

Introduction

In this page you can find the example usage for org.springframework.messaging.simp SimpAttributes SimpAttributes.

Prototype

public SimpAttributes(String sessionId, Map<String, Object> attributes) 

Source Link

Document

Constructor wrapping the given session attributes map.

Usage

From source file:org.springframework.messaging.simp.SimpAttributes.java

/**
 * Extract the SiMP session attributes from the given message and
 * wrap them in a {@link SimpAttributes} instance.
 * @param message the message to extract session attributes from
 *//*from  w ww  .j a v a  2  s  . c om*/
public static SimpAttributes fromMessage(Message<?> message) {
    Assert.notNull(message, "Message must not be null");
    MessageHeaders headers = message.getHeaders();
    String sessionId = SimpMessageHeaderAccessor.getSessionId(headers);
    Map<String, Object> sessionAttributes = SimpMessageHeaderAccessor.getSessionAttributes(headers);
    if (sessionId == null) {
        throw new IllegalStateException("No session id in " + message);
    }
    if (sessionAttributes == null) {
        throw new IllegalStateException("No session attributes in " + message);
    }
    return new SimpAttributes(sessionId, sessionAttributes);
}

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From source file:org.springframework.web.socket.messaging.StompSubProtocolHandler.java

/**
 * Handle STOMP messages going back out to WebSocket clients.
 *///from w  w  w  . j a va 2 s .  c om
@Override
@SuppressWarnings("unchecked")
public void handleMessageToClient(WebSocketSession session, Message<?> message) {
    if (!(message.getPayload() instanceof byte[])) {
        if (logger.isErrorEnabled()) {
            logger.error("Expected byte[] payload. Ignoring " + message + ".");
        }
        return;
    }

    StompHeaderAccessor accessor = getStompHeaderAccessor(message);
    StompCommand command = accessor.getCommand();

    if (StompCommand.MESSAGE.equals(command)) {
        if (accessor.getSubscriptionId() == null && logger.isWarnEnabled()) {
            logger.warn("No STOMP \"subscription\" header in " + message);
        }
        String origDestination = accessor.getFirstNativeHeader(SimpMessageHeaderAccessor.ORIGINAL_DESTINATION);
        if (origDestination != null) {
            accessor = toMutableAccessor(accessor, message);
            accessor.removeNativeHeader(SimpMessageHeaderAccessor.ORIGINAL_DESTINATION);
            accessor.setDestination(origDestination);
        }
    } else if (StompCommand.CONNECTED.equals(command)) {
        this.stats.incrementConnectedCount();
        accessor = afterStompSessionConnected(message, accessor, session);
        if (this.eventPublisher != null && StompCommand.CONNECTED.equals(command)) {
            try {
                SimpAttributes simpAttributes = new SimpAttributes(session.getId(), session.getAttributes());
                SimpAttributesContextHolder.setAttributes(simpAttributes);
                Principal user = getUser(session);
                publishEvent(this.eventPublisher,
                        new SessionConnectedEvent(this, (Message<byte[]>) message, user));
            } finally {
                SimpAttributesContextHolder.resetAttributes();
            }
        }
    }

    byte[] payload = (byte[]) message.getPayload();
    if (StompCommand.ERROR.equals(command) && getErrorHandler() != null) {
        Message<byte[]> errorMessage = getErrorHandler().handleErrorMessageToClient((Message<byte[]>) message);
        if (errorMessage != null) {
            accessor = MessageHeaderAccessor.getAccessor(errorMessage, StompHeaderAccessor.class);
            Assert.state(accessor != null, "No StompHeaderAccessor");
            payload = errorMessage.getPayload();
        }
    }
    sendToClient(session, accessor, payload);
}

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