/**
* Checks whether an edge-triggered alarm can be fired (does not care about the suppress interval
* - use the <code>isSuppressed</code> method).
*
* @param value The current value of the corresponding managed object field
* @param alarmControl The alarm control
* @return <code>true</code> if it can be fired, <code>false</code> otherwise
*/
private boolean isEdgeTriggeredAlarmReadyForFire(
long value, EdgeTriggeredAlarmControl alarmControl) {
if (alarmControl.getEnabled()) {
boolean fallingEdge = alarmControl.getDirection() == EdgeTriggeredAlarmDirection.FALLING;
if (alarmControl.getStatus() == EdgeTriggeredAlarmStatus.FIRED) {
if (fallingEdge) {
if (value > alarmControl.getRearmThreshold())
alarmControl.setStatus(EdgeTriggeredAlarmStatus.ARMED);
} else {
if (value < alarmControl.getRearmThreshold())
alarmControl.setStatus(EdgeTriggeredAlarmStatus.ARMED);
}
}
if (alarmControl.getStatus() == EdgeTriggeredAlarmStatus.ARMED) {
if (fallingEdge) {
if (value < alarmControl.getAlarmThreshold()) {
return true;
}
} else {
if (value > alarmControl.getAlarmThreshold()) {
return true;
}
}
}
}
return false;
}
/**
* Fires an alarm.
*
* @param alarm The alarm
* @param alarmControl The alarm control
*/
private void fireAlarm_(Alarm alarm, AlarmControl alarmControl) {
alarmProcessor.process(alarm);
lastFiredTimes.remove(alarmControl);
lastFiredTimes.put(alarmControl, System.currentTimeMillis());
if (alarmControl instanceof EdgeTriggeredAlarmControl) {
((EdgeTriggeredAlarmControl) alarmControl).setStatus(EdgeTriggeredAlarmStatus.FIRED);
}
log.debug(alarm.getName() + " fired");
}
