public MessageDispatcher(SignatureManager signatureManager)
public MessageDispatcher(DataSource ds, SignatureManager signatureManager)
    public MessageDispatcher(SignatureManager signatureManager)        throws MessageDispatcherException {        this.signatureManager = signatureManager;        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();        dbf.setNamespaceAware(true);        try {            documentBuilder = dbf.newDocumentBuilder();        } catch (Exception e) {            throw new MessageDispatcherException("Could not get DocumentBuilder: " + e);        }        xmlSerializer = new XMLSerializer();    }