public static void alarm(final byte level, final String title, final String content) {
        AlarmContent alarmContent = new AlarmContent.Builder()
                                            .level(level).title(title)
                                            .content(content).namespaceId(namespaceId)
                                            .dateCreated(new Date()).build();
        alarm(alarmContent);
    }
Send alarm content.
@param level Alarm level. 0: high-emergency-critical 1: medium-critical-critical 2: low-warning-warning
@param title Alarm title
@param content Alarm content
shenyu-plugin/shenyu-plugin-base/src/main/java/org/apache/shenyu/plugin/base/alert/AlarmSender.java