public List<InetAddress> calculateNaturalEndpoints(Token token, TokenMetadata metadata) {
int replicas = getReplicationFactor();
ArrayList<Token> tokens = metadata.sortedTokens();
List<InetAddress> endpoints = new ArrayList<InetAddress>(replicas);
if (tokens.isEmpty()) return endpoints;
// Add the token at the index by default
Iterator<Token> iter = TokenMetadata.ringIterator(tokens, token, false);
while (endpoints.size() < replicas && iter.hasNext()) {
endpoints.add(metadata.getEndpoint(iter.next()));
}
return endpoints;
}
public List<InetAddress> calculateNaturalEndpoints(Token token, TokenMetadata metadata) {
int replicas = getReplicationFactor();
ArrayList<Token> tokens = metadata.sortedTokens();
List<InetAddress> endpoints = new ArrayList<InetAddress>(replicas);
if (tokens.isEmpty()) return endpoints;
// Add the token at the index by default
Iterator<Token> iter = TokenMetadata.ringIterator(tokens, token, false);
while (endpoints.size() < replicas && iter.hasNext()) {
endpoints.add(metadata.getEndpoint(iter.next()));
}
if (endpoints.size() < replicas)
throw new IllegalStateException(
String.format(
"replication factor (%s) exceeds number of endpoints (%s)",
replicas, endpoints.size()));
return endpoints;
}
/**
* Test whether write endpoints is correct when the node is leaving. Uses StorageService.onChange
* and does not manipulate token metadata directly.
*/
@Test
public void newTestWriteEndpointsDuringLeave() throws Exception {
StorageService ss = StorageService.instance;
final int RING_SIZE = 6;
final int LEAVING_NODE = 3;
TokenMetadata tmd = ss.getTokenMetadata();
tmd.clearUnsafe();
IPartitioner partitioner = RandomPartitioner.instance;
VersionedValue.VersionedValueFactory valueFactory =
new VersionedValue.VersionedValueFactory(partitioner);
ArrayList<Token> endpointTokens = new ArrayList<Token>();
ArrayList<Token> keyTokens = new ArrayList<Token>();
List<InetAddress> hosts = new ArrayList<InetAddress>();
List<UUID> hostIds = new ArrayList<UUID>();
Util.createInitialRing(ss, partitioner, endpointTokens, keyTokens, hosts, hostIds, RING_SIZE);
Map<Token, List<InetAddress>> expectedEndpoints = new HashMap<Token, List<InetAddress>>();
for (String keyspaceName : Schema.instance.getNonLocalStrategyKeyspaces()) {
for (Token token : keyTokens) {
List<InetAddress> endpoints = new ArrayList<InetAddress>();
Iterator<Token> tokenIter = TokenMetadata.ringIterator(tmd.sortedTokens(), token, false);
while (tokenIter.hasNext()) {
endpoints.add(tmd.getEndpoint(tokenIter.next()));
}
expectedEndpoints.put(token, endpoints);
}
}
// Third node leaves
ss.onChange(
hosts.get(LEAVING_NODE),
ApplicationState.STATUS,
valueFactory.leaving(Collections.singleton(endpointTokens.get(LEAVING_NODE))));
assertTrue(tmd.isLeaving(hosts.get(LEAVING_NODE)));
Thread.sleep(100); // because there is a tight race between submit and blockUntilFinished
PendingRangeCalculatorService.instance.blockUntilFinished();
AbstractReplicationStrategy strategy;
for (String keyspaceName : Schema.instance.getNonLocalStrategyKeyspaces()) {
strategy = getStrategy(keyspaceName, tmd);
for (Token token : keyTokens) {
int replicationFactor = strategy.getReplicationFactor();
HashSet<InetAddress> actual =
new HashSet<InetAddress>(
tmd.getWriteEndpoints(
token,
keyspaceName,
strategy.calculateNaturalEndpoints(token, tmd.cloneOnlyTokenMap())));
HashSet<InetAddress> expected = new HashSet<InetAddress>();
for (int i = 0; i < replicationFactor; i++) {
expected.add(expectedEndpoints.get(token).get(i));
}
// if the leaving node is in the endpoint list,
// then we should expect it plus one extra for when it's gone
if (expected.contains(hosts.get(LEAVING_NODE)))
expected.add(expectedEndpoints.get(token).get(replicationFactor));
assertEquals("mismatched endpoint sets", expected, actual);
}
}
}