Example usage for org.springframework.messaging.simp.stomp BufferingStompDecoder getBufferSize

Introduction

In this page you can find the example usage for org.springframework.messaging.simp.stomp BufferingStompDecoder getBufferSize.

Prototype

public int getBufferSize() 

Source Link

Document

Calculate the current buffer size.

Usage

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

/**
 * Handle incoming WebSocket messages from clients.
 *///from   w  w  w. java 2 s  .co  m
public void handleMessageFromClient(WebSocketSession session, WebSocketMessage<?> webSocketMessage,
        MessageChannel outputChannel) {

    List<Message<byte[]>> messages;
    try {
        ByteBuffer byteBuffer;
        if (webSocketMessage instanceof TextMessage) {
            byteBuffer = ByteBuffer.wrap(((TextMessage) webSocketMessage).asBytes());
        } else if (webSocketMessage instanceof BinaryMessage) {
            byteBuffer = ((BinaryMessage) webSocketMessage).getPayload();
        } else {
            return;
        }

        BufferingStompDecoder decoder = this.decoders.get(session.getId());
        if (decoder == null) {
            throw new IllegalStateException("No decoder for session id '" + session.getId() + "'");
        }

        messages = decoder.decode(byteBuffer);
        if (messages.isEmpty()) {
            if (logger.isTraceEnabled()) {
                logger.trace("Incomplete STOMP frame content received in session " + session + ", bufferSize="
                        + decoder.getBufferSize() + ", bufferSizeLimit=" + decoder.getBufferSizeLimit() + ".");
            }
            return;
        }
    } catch (Throwable ex) {
        if (logger.isErrorEnabled()) {
            logger.error("Failed to parse " + webSocketMessage + " in session " + session.getId()
                    + ". Sending STOMP ERROR to client.", ex);
        }
        handleError(session, ex, null);
        return;
    }

    for (Message<byte[]> message : messages) {
        try {
            StompHeaderAccessor headerAccessor = MessageHeaderAccessor.getAccessor(message,
                    StompHeaderAccessor.class);
            Assert.state(headerAccessor != null, "No StompHeaderAccessor");

            headerAccessor.setSessionId(session.getId());
            headerAccessor.setSessionAttributes(session.getAttributes());
            headerAccessor.setUser(getUser(session));
            headerAccessor.setHeader(SimpMessageHeaderAccessor.HEART_BEAT_HEADER,
                    headerAccessor.getHeartbeat());
            if (!detectImmutableMessageInterceptor(outputChannel)) {
                headerAccessor.setImmutable();
            }

            if (logger.isTraceEnabled()) {
                logger.trace("From client: " + headerAccessor.getShortLogMessage(message.getPayload()));
            }

            StompCommand command = headerAccessor.getCommand();
            boolean isConnect = StompCommand.CONNECT.equals(command);
            if (isConnect) {
                this.stats.incrementConnectCount();
            } else if (StompCommand.DISCONNECT.equals(command)) {
                this.stats.incrementDisconnectCount();
            }

            try {
                SimpAttributesContextHolder.setAttributesFromMessage(message);
                boolean sent = outputChannel.send(message);

                if (sent) {
                    if (isConnect) {
                        Principal user = headerAccessor.getUser();
                        if (user != null && user != session.getPrincipal()) {
                            this.stompAuthentications.put(session.getId(), user);
                        }
                    }
                    if (this.eventPublisher != null) {
                        Principal user = getUser(session);
                        if (isConnect) {
                            publishEvent(this.eventPublisher, new SessionConnectEvent(this, message, user));
                        } else if (StompCommand.SUBSCRIBE.equals(command)) {
                            publishEvent(this.eventPublisher, new SessionSubscribeEvent(this, message, user));
                        } else if (StompCommand.UNSUBSCRIBE.equals(command)) {
                            publishEvent(this.eventPublisher, new SessionUnsubscribeEvent(this, message, user));
                        }
                    }
                }
            } finally {
                SimpAttributesContextHolder.resetAttributes();
            }
        } catch (Throwable ex) {
            if (logger.isErrorEnabled()) {
                logger.error("Failed to send client message to application via MessageChannel" + " in session "
                        + session.getId() + ". Sending STOMP ERROR to client.", ex);
            }
            handleError(session, ex, message);
        }
    }
}

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