/**
* If the key is to be associated with a valid value, a mutation is created for it with the given
* table and columns. In the event the value in the column is missing (i.e., null), then it is
* marked for {@link Deletion}. Similarly, if the entire value for a key is missing (i.e., null),
* then the entire key is marked for {@link Deletion}.
*
* @param keyColumns the key to write.
* @param values the values to write.
* @throws IOException
*/
@Override
public void write(Map<String, ByteBuffer> keyColumns, List<ByteBuffer> values)
throws IOException {
TokenRange range = ringCache.getRange(getPartitionKey(keyColumns));
// get the client for the given range, or create a new one
final InetAddress address = ringCache.getEndpoints(range).get(0);
RangeClient client = clients.get(address);
if (client == null) {
// haven't seen keys for this range: create new client
client = new RangeClient(ringCache.getEndpoints(range));
client.start();
clients.put(address, client);
}
// add primary key columns to the bind variables
List<ByteBuffer> allValues = new ArrayList<ByteBuffer>(values);
for (ColumnMetadata column : partitionKeyColumns)
allValues.add(keyColumns.get(column.getName()));
for (ColumnMetadata column : clusterColumns) allValues.add(keyColumns.get(column.getName()));
client.put(allValues);
if (progressable != null) progressable.progress();
if (context != null) HadoopCompat.progress(context);
}
public List<InetAddress> getEndpoints(TokenRange range) {
Set<Host> hostSet = rangeMap.get(range);
List<InetAddress> addresses = new ArrayList<>(hostSet.size());
for (Host host : hostSet) {
addresses.add(host.getAddress());
}
return addresses;
}