private static Cassandra.Client createThriftClient(
String host, int port, String user, String passwd, ITransportFactory transportFactory)
throws Exception {
TTransport trans = transportFactory.openTransport(host, port);
TProtocol protocol = new TBinaryProtocol(trans);
Cassandra.Client client = new Cassandra.Client(protocol);
if (user != null && passwd != null) {
Map<String, String> credentials = new HashMap<>();
credentials.put(IAuthenticator.USERNAME_KEY, user);
credentials.put(IAuthenticator.PASSWORD_KEY, passwd);
AuthenticationRequest authenticationRequest = new AuthenticationRequest(credentials);
client.login(authenticationRequest);
}
return client;
}
@Override
public void init(String keyspace) {
Iterator<InetAddress> hostiter = hosts.iterator();
while (hostiter.hasNext()) {
try {
// Query endpoint to ranges map and schemas from thrift
InetAddress host = hostiter.next();
Cassandra.Client client =
createThriftClient(
host.getHostAddress(), rpcPort, this.user, this.passwd, this.transportFactory);
setPartitioner(client.describe_partitioner());
Token.TokenFactory tkFactory = getPartitioner().getTokenFactory();
for (TokenRange tr : client.describe_ring(keyspace)) {
Range<Token> range =
new Range<>(
tkFactory.fromString(tr.start_token),
tkFactory.fromString(tr.end_token),
getPartitioner());
for (String ep : tr.endpoints) {
addRangeForEndpoint(range, InetAddress.getByName(ep));
}
}
String query =
String.format(
"SELECT * FROM %s.%s WHERE keyspace_name = '%s'",
Keyspace.SYSTEM_KS, SystemKeyspace.SCHEMA_COLUMNFAMILIES_CF, keyspace);
CqlResult result =
client.execute_cql3_query(
ByteBufferUtil.bytes(query), Compression.NONE, ConsistencyLevel.ONE);
for (CqlRow row : result.rows) {
CFMetaData metadata = CFMetaData.fromThriftCqlRow(row);
knownCfs.put(metadata.cfName, metadata);
}
break;
} catch (Exception e) {
if (!hostiter.hasNext())
throw new RuntimeException("Could not retrieve endpoint ranges: ", e);
}
}
}