protected void handleCredit(Address sender, long increase) {
Credit cred;
if (sender == null || (cred = sent.get(sender)) == null || increase <= 0) return;
long new_credit = Math.min(max_credits, cred.get() + increase);
if (log.isTraceEnabled()) {
StringBuilder sb = new StringBuilder();
sb.append("received " + increase + " credits from ")
.append(sender)
.append(", old credits: ")
.append(cred)
.append(", new credits: ")
.append(new_credit);
log.trace(sb);
}
cred.increment(increase);
}
