}
}
public ExchangeMetricWriter(int alertIntervalSec) {
this.alertIntervalSec = alertIntervalSec;
smtpNode = new CachedZNode("/global/mail_smtp", 5000);
fromNode = new CachedZNode("/global/mail_sender", 5000);
receiverNode = new CachedZNode("/global/mail_alert", 5000);
}