protected Object handleDownMessage(final Event evt, final Message msg, Address dest, int length) {
if (dest != null) // 2nd line of defense, not really needed
return down_prot.down(evt);
long block_time = max_block_times != null ? getMaxBlockTime(length) : max_block_time;
while (running) {
boolean rc = credits.decrement(length, block_time);
if (rc || max_block_times != null || !running) break;
if (needToSendCreditRequest()) {
List<Tuple<Address, Long>> targets = credits.getMembersWithCreditsLessThan(min_credits);
for (Tuple<Address, Long> tuple : targets)
sendCreditRequest(tuple.getVal1(), Math.min(max_credits, max_credits - tuple.getVal2()));
}
}
// send message - either after regular processing, or after blocking (when enough credits are
// available again)
return down_prot.down(evt);
}
