private double calcAverageWithinPeriod(VirtualMachineStatisticsChangedEvent event) {
if (event.getStatistics().isNA()) {
return -1;
}
final String key = event.getVirtualMachine().getUid();
movingAverageStatistics.addStatistics(key, event.getStatistics().getMemoryHeapUsedPerc());
double average = movingAverageStatistics.getAverageAndReset(key);
if (average != -1 && logger.isLoggable(Level.FINE)) {
logger.fine(
"vm pid=["
+ event.getVirtualMachine().getDetails().getPid()
+ "] memory used=["
+ event.getStatistics().getMemoryHeapUsedPerc()
+ "%]"
+ " average=["
+ average
+ "%] values: "
+ movingAverageStatistics.toString(key));
}
return average;
}
@Override
public void destroy() throws Exception {
movingAverageStatistics.clear();
admin.getVirtualMachines().getVirtualMachineRemoved().remove(this);
admin.getVirtualMachines().getVirtualMachineStatisticsChanged().remove(this);
admin.getVirtualMachines().stopStatisticsMonitor();
}
@Override
public void virtualMachineRemoved(VirtualMachine virtualMachine) {
movingAverageStatistics.clear(virtualMachine.getUid());
final String groupUid = generateGroupUid(virtualMachine.getUid());
Alert[] alertsByGroupUid =
((InternalAlertManager) admin.getAlertManager())
.getAlertRepository()
.getAlertsByGroupUid(groupUid);
if (alertsByGroupUid.length != 0 && !alertsByGroupUid[0].getStatus().isResolved()) {
AlertFactory factory = new AlertFactory();
factory.name(ALERT_NAME);
factory.groupUid(groupUid);
factory.description(
AlertBeanUtils.getGridComponentShortName(virtualMachine)
+ " Heap memory is unavailable; JVM has been removed");
factory.severity(AlertSeverity.WARNING);
factory.status(AlertStatus.NA);
factory.componentUid(virtualMachine.getUid());
factory.componentDescription(AlertBeanUtils.getGridComponentDescription(virtualMachine));
factory.config(config.getProperties());
Alert alert = factory.toAlert();
admin.getAlertManager().triggerAlert(new HeapMemoryUtilizationAlert(alert));
}
}