SOAPConnection connection = conFactory.createConnection();
MessageFactory msgFactory = MessageFactory.newInstance(SOAPConstants.SOAP_1_2_PROTOCOL);
SOAPMessage msg = msgFactory.createMessage();
SOAPBodyElement bodyElement = msg.getSOAPBody().addBodyElement(new QName("urn:switchyard-quickstart:soap-attachment:1.0", "echoImage"));
bodyElement.addTextNode("cid:switchyard.png");
AttachmentPart ap = msg.createAttachmentPart();
URL imageUrl = Classes.getResource("switchyard.png");
ap.setDataHandler(new DataHandler(new URLDataSource(imageUrl)));
ap.setContentId("switchyard.png");