public AlertResult sendMails()

in dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-email/src/main/java/org/apache/dolphinscheduler/plugin/alert/email/MailSender.java [155:213]
45 lines of code
14 McCabe index (conditional complexity)

    public AlertResult sendMails(List<String> receivers, List<String> receiverCcs, String title, String content) {
        AlertResult alertResult = new AlertResult();
        alertResult.setSuccess(false);

        // if there is no receivers && no receiversCc, no need to process
        if (CollectionUtils.isEmpty(receivers) && CollectionUtils.isEmpty(receiverCcs)) {
            return alertResult;
        }

        receivers.removeIf(StringUtils::isEmpty);
        Thread.currentThread().setContextClassLoader(getClass().getClassLoader());

        if (showType.equals(ShowType.TABLE.getDescp()) || showType.equals(ShowType.TEXT.getDescp())) {
            // send email
            HtmlEmail email = new HtmlEmail();

            try {
                Session session = getSession();
                email.setMailSession(session);
                email.setFrom(mailSenderEmail);
                email.setCharset(StandardCharsets.UTF_8.name());
                if (CollectionUtils.isNotEmpty(receivers)) {
                    // receivers mail
                    for (String receiver : receivers) {
                        email.addTo(receiver);
                    }
                }

                if (CollectionUtils.isNotEmpty(receiverCcs)) {
                    // cc
                    for (String receiverCc : receiverCcs) {
                        email.addCc(receiverCc);
                    }
                }
                // sender mail
                return getStringObjectMap(title, content, alertResult, email);
            } catch (Exception e) {
                handleException(alertResult, e);
            }
        } else if (showType.equals(ShowType.ATTACHMENT.getDescp())
                || showType.equals(ShowType.TABLE_ATTACHMENT.getDescp())) {
            try {

                String partContent = (showType.equals(ShowType.ATTACHMENT.getDescp())
                        ? "Please see the attachment " + title + EmailConstants.EXCEL_SUFFIX_XLSX
                        : htmlTable(content, false));

                attachment(title, content, partContent);

                alertResult.setSuccess(true);
                return alertResult;
            } catch (Exception e) {
                handleException(alertResult, e);
                return alertResult;
            }
        }
        return alertResult;

    }