/**
* 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;
}
/** The main loop of the polling thread. */
@Override
public void run() {
while (true) {
// free memory alarm
EdgeTriggeredAlarmControl freeMemAlarmControl = readerDevice.getFreeMemoryAlarmControl();
if (isEdgeTriggeredAlarmReadyForFire(readerDevice.getFreeMemory(), freeMemAlarmControl)) {
if (freeMemoryAlarm == null)
freeMemoryAlarm =
new FreeMemoryAlarm("FreeMemoryAlarm", freeMemAlarmControl.getLevel(), readerDevice);
if (!alarmIsSuppressed(freeMemAlarmControl)) {
fireAlarm_(freeMemoryAlarm, freeMemAlarmControl);
freeMemoryAlarm = null;
} else {
freeMemoryAlarm.suppress();
log.debug(freeMemoryAlarm.getName() + " suppressed");
}
}
// other alarms...
// operational status alarms
readerDevice.getOperStatus();
ReadPoint[] readPoints = readerDevice.getAllReadPoints();
for (int i = 0; i < readPoints.length; i++) {
readPoints[i].getOperStatus();
}
IOPort[] ioPorts = readerDevice.getAllIOPorts();
for (int i = 0; i < ioPorts.length; i++) {
ioPorts[i].getOperStatus();
}
NotificationChannel[] notifChans = readerDevice.getAllNotificationChannels();
for (int i = 0; i < notifChans.length; i++) {
notifChans[i].getOperStatus();
}
Source[] sources = readerDevice.getAllSources();
for (int i = 0; i < sources.length; i++) {
sources[i].getOperStatus();
}
try {
Thread.sleep(AlarmManager.POLL_INTERVAL);
} catch (InterruptedException ignore) {
}
}
}
/**
* 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");
}
/**
* Fires an alarm iff all relevant conditions are fulfilled.
*
* @param alarm The alarm
* @param alarmControl The alarm control
*/
public void fireAlarm(Alarm alarm, AlarmControl alarmControl) {
if (alarmControl.getEnabled()) {
try {
if (alarm instanceof TTOperStatusAlarm) {
TTOperStatusAlarm operStatusAlarm = (TTOperStatusAlarm) alarm;
TTOperationalStatusAlarmControl operStatusAlarmControl =
(TTOperationalStatusAlarmControl) alarmControl;
if ((operStatusAlarmControl.getTriggerFromState() == OperationalStatus.ANY)
|| (operStatusAlarmControl.getTriggerToState() == OperationalStatus.ANY)
|| (operStatusAlarm.getFromState() == operStatusAlarmControl.getTriggerFromState())
|| (operStatusAlarm.getToState() == operStatusAlarmControl.getTriggerToState())) {
if (!alarmIsSuppressed(operStatusAlarmControl)) {
fireAlarm_(operStatusAlarm, operStatusAlarmControl);
} else {
operStatusAlarm.suppress();
log.debug(operStatusAlarm.getName() + " suppressed");
}
}
} else if (alarmControl instanceof EdgeTriggeredAlarmControl) {
EdgeTriggeredAlarmControl edgeTriggeredAlarmControl =
(EdgeTriggeredAlarmControl) alarmControl;
if (edgeTriggeredAlarmControl.getStatus() == EdgeTriggeredAlarmStatus.ARMED) {
if (!alarmIsSuppressed(edgeTriggeredAlarmControl)) {
fireAlarm_(alarm, edgeTriggeredAlarmControl);
} else {
alarm.suppress();
log.debug(alarm.getName() + " suppressed");
}
}
} else {
if (!alarmIsSuppressed(alarmControl)) {
fireAlarm_(alarm, alarmControl);
} else {
alarm.suppress();
log.debug(alarm.getName() + " suppressed");
}
}
} catch (ClassCastException cce) {
log.error("Alarm and AlarmControl don't match.");
}
}
}
