public Host updateSpeed(Host host) {
if (host == null) return null;
double speed =
host.getEngineList()
.stream()
.map(EngineRole::getCurrentSpeed)
.reduce((double) 0, (a, b) -> a + b);
HostSpeedRcd speedRcd = new HostSpeedRcd();
Date time = new Date();
speedRcd.setHost(host);
speedRcd.setTime(time);
speedRcd.setSpeed(speed);
host.getSpeedRcds().add(speedRcd);
host.setCurrentSpeed(speed);
host.setRecordTime(time);
_pm.exec(speedRcd, HibernateEngine.DB_INSERT, true);
_pm.exec(host, HibernateEngine.DB_UPDATE, true);
return host;
}
