private void checkMessageAttributes()

in src/main/java/com/amazon/sqs/javamessaging/AmazonSQSExtendedClient.java [840:866]
25 lines of code
4 McCabe index (conditional complexity)

    private void checkMessageAttributes(Map<String, MessageAttributeValue> messageAttributes) {
        int msgAttributesSize = getMsgAttributesSize(messageAttributes);
        if (msgAttributesSize > clientConfiguration.getPayloadSizeThreshold()) {
            String errorMessage = "Total size of Message attributes is " + msgAttributesSize
                    + " bytes which is larger than the threshold of " + clientConfiguration.getPayloadSizeThreshold()
                    + " Bytes. Consider including the payload in the message body instead of message attributes.";
            LOG.error(errorMessage);
            throw SdkClientException.create(errorMessage);
        }

        int messageAttributesNum = messageAttributes.size();
        if (messageAttributesNum > SQSExtendedClientConstants.MAX_ALLOWED_ATTRIBUTES) {
            String errorMessage = "Number of message attributes [" + messageAttributesNum
                    + "] exceeds the maximum allowed for large-payload messages ["
                    + SQSExtendedClientConstants.MAX_ALLOWED_ATTRIBUTES + "].";
            LOG.error(errorMessage);
            throw SdkClientException.create(errorMessage);
        }
        Optional<String> largePayloadAttributeName = getReservedAttributeNameIfPresent(messageAttributes);

        if (largePayloadAttributeName.isPresent()) {
            String errorMessage = "Message attribute name " + largePayloadAttributeName.get()
                    + " is reserved for use by SQS extended client.";
            LOG.error(errorMessage);
            throw SdkClientException.create(errorMessage);
        }
    }