public static void sendMessage()

in app/src/main/java/org/apache/roller/weblogger/util/MailUtil.java [568:662]
72 lines of code
19 McCabe index (conditional complexity)

    public static void sendMessage(String from, String[] to, String[] cc, String[] bcc, String subject,
            String content, String mimeType) throws MessagingException {
        
        MailProvider mailProvider = WebloggerStartup.getMailProvider();
        if (mailProvider == null) {
            return;
        }
        
        Session session = mailProvider.getSession();
        MimeMessage message = new MimeMessage(session);
        
        // n.b. any default from address is expected to be determined by caller.
        if (! StringUtils.isEmpty(from)) {
            InternetAddress sentFrom = new InternetAddress(from);
            message.setFrom(sentFrom);
            if (log.isDebugEnabled()) {
                log.debug("e-mail from: " + sentFrom);
            }
        }
        
        if (to!=null) {
            InternetAddress[] sendTo = new InternetAddress[to.length];
            
            for (int i = 0; i < to.length; i++) {
                sendTo[i] = new InternetAddress(to[i]);
                if (log.isDebugEnabled()) {
                    log.debug("sending e-mail to: " + to[i]);
                }
            }
            message.setRecipients(Message.RecipientType.TO, sendTo);
        }
        
        if (cc != null) {
            InternetAddress[] copyTo = new InternetAddress[cc.length];
            
            for (int i = 0; i < cc.length; i++) {
                copyTo[i] = new InternetAddress(cc[i]);
                if (log.isDebugEnabled()) {
                    log.debug("copying e-mail to: " + cc[i]);
                }
            }
            message.setRecipients(Message.RecipientType.CC, copyTo);
        }
        
        if (bcc != null) {
            InternetAddress[] copyTo = new InternetAddress[bcc.length];
            
            for (int i = 0; i < bcc.length; i++) {
                copyTo[i] = new InternetAddress(bcc[i]);
                if (log.isDebugEnabled()) {
                    log.debug("blind copying e-mail to: " + bcc[i]);
                }
            }
            message.setRecipients(Message.RecipientType.BCC, copyTo);
        }
        message.setSubject((subject == null) ? "(no subject)" : subject, "UTF-8");
        message.setContent(content, mimeType);
        message.setSentDate(new java.util.Date());
        
        // First collect all the addresses together.
        Address[] remainingAddresses = message.getAllRecipients();
        int nAddresses = remainingAddresses.length;
        boolean bFailedToSome = false;
        
        SendFailedException sendex = new SendFailedException("Unable to send message to some recipients");
        
        Transport transport = mailProvider.getTransport();
        
        // Try to send while there remain some potentially good addresses
        try { 
            do {
                // Avoid a loop if we are stuck
                nAddresses = remainingAddresses.length;

                try {
                    // Send to the list of remaining addresses, ignoring the addresses attached to the message
                    transport.sendMessage(message, remainingAddresses);
                } catch(SendFailedException ex) {
                    bFailedToSome=true;
                    sendex.setNextException(ex);

                    // Extract the remaining potentially good addresses
                    remainingAddresses=ex.getValidUnsentAddresses();
                }
            } while (remainingAddresses!=null && remainingAddresses.length>0 
                    && remainingAddresses.length!=nAddresses);
            
        } finally {
            transport.close();
        }
        
        if (bFailedToSome) {
            throw sendex;
        }
    }