@Override
public HClientPool getPool(Collection<HClientPool> pools, Set<CassandraHost> excludeHosts) {
List<HClientPool> vals = Lists.newArrayList(pools);
// shuffle pools to avoid always returning the same one when we are not terribly busy
Collections.shuffle(vals);
Collections.sort(vals, new ShufflingCompare());
Iterator<HClientPool> iterator = vals.iterator();
HClientPool concurrentHClientPool = iterator.next();
if (excludeHosts != null && excludeHosts.size() > 0) {
while (iterator.hasNext()) {
if (!excludeHosts.contains(concurrentHClientPool.getCassandraHost())) {
break;
}
concurrentHClientPool = (ConcurrentHClientPool) iterator.next();
}
}
return concurrentHClientPool;
}
public int compare(HClientPool o1, HClientPool o2) {
if (log.isDebugEnabled()) {
log.debug(
"comparing 1: {} and count {} with 2: {} and count {}",
new Object[] {
o1.getCassandraHost(), o1.getNumActive(), o2.getCassandraHost(), o2.getNumActive()
});
}
return o1.getNumActive() - o2.getNumActive();
}