/**
* 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);
}
private ByteBuffer getPartitionKey(Map<String, ByteBuffer> keyColumns) {
ByteBuffer partitionKey;
if (partitionKeyColumns.size() > 1) {
ByteBuffer[] keys = new ByteBuffer[partitionKeyColumns.size()];
for (int i = 0; i < keys.length; i++)
keys[i] = keyColumns.get(partitionKeyColumns.get(i).getName());
partitionKey = CompositeType.build(keys);
} else {
partitionKey = keyColumns.get(partitionKeyColumns.get(0).getName());
}
return partitionKey;
}
@Override
public void close() throws IOException {
// close all the clients before throwing anything
IOException clientException = null;
for (RangeClient client : clients.values()) {
try {
client.close();
} catch (IOException e) {
clientException = e;
}
}
if (clientException != null) throw clientException;
}
