@SuppressWarnings("unchecked")
@Override
/**
* Update the list of pools using the provided mapping of start token to collection of hosts that
* own the token
*/
public synchronized boolean setPools(Collection<HostConnectionPool<CL>> ring) {
boolean didChange = false;
Set<HostConnectionPool<CL>> allPools = Sets.newHashSet();
// Create a mapping of end token to a list of hosts that own the token
Map<RingPosition, List<HostConnectionPool<CL>>> tokenHostMap = Maps.newHashMap();
for (HostConnectionPool<CL> pool : ring) {
allPools.add(pool);
if (!this.allPools.hasPool(pool)) didChange = true;
for (TokenRange range : pool.getHost().getTokenRanges()) {
RingPosition endToken = partitioner.getRingPositionForToken(range.getEndToken());
List<HostConnectionPool<CL>> partition = tokenHostMap.get(endToken);
if (partition == null) {
partition = Lists.newArrayList();
tokenHostMap.put(endToken, partition);
}
partition.add(pool);
}
}
// Temporary list of token that will be removed if not found in the new ring
Set<RingPosition> tokensToRemove = Sets.newHashSet(tokenHostMap.keySet());
// Iterate all tokens
for (Entry<RingPosition, List<HostConnectionPool<CL>>> entry : tokenHostMap.entrySet()) {
RingPosition token = entry.getKey();
tokensToRemove.remove(token);
// Add a new partition or modify an existing one
TokenHostConnectionPoolPartition<CL> partition = tokenToPartitionMap.get(token);
if (partition == null) {
partition = makePartition(token);
tokenToPartitionMap.put(token, partition);
didChange = true;
}
if (partition.setPools(entry.getValue())) didChange = true;
}
// Remove the tokens that are no longer in the ring
for (RingPosition token : tokensToRemove) {
tokenHostMap.remove(token);
didChange = true;
}
// Sort partitions by token
if (didChange) {
List<TokenHostConnectionPoolPartition<CL>> partitions =
Lists.newArrayList(tokenToPartitionMap.values());
Collections.sort(partitions, partitionComparator);
this.allPools.setPools(allPools);
refresh();
this.sortedRing.set(Collections.unmodifiableList(partitions));
}
return didChange;
}
