private Integer seekToSubColumn(
CFMetaData metadata,
FileDataInput file,
ByteBuffer sblockId,
List<IndexHelper.IndexInfo> indexList)
throws IOException {
file.readInt(); // column count
/* get the various column ranges we have to read */
AbstractType comparator = metadata.comparator;
int index = IndexHelper.indexFor(sblockId, indexList, comparator, false);
if (index == indexList.size()) return null;
IndexHelper.IndexInfo indexInfo = indexList.get(index);
if (comparator.compare(sblockId, indexInfo.firstName) < 0) return null;
FileMark mark = file.mark();
FileUtils.skipBytesFully(file, indexInfo.offset);
while (file.bytesPastMark(mark) < indexInfo.offset + indexInfo.width) {
Integer dataLength = isSubBlockFound(metadata, file, sblockId);
if (dataLength == null) return null;
if (dataLength < 0) continue;
return dataLength;
}
return null;
}
private List<String> getKeyLocations(ByteBuffer key) {
List<InetAddress> endpoints = StorageService.instance.getLiveNaturalEndpoints(cfsKeyspace, key);
DatabaseDescriptor.getEndpointSnitch()
.sortByProximity(FBUtilities.getLocalAddress(), endpoints);
List<String> hosts = new ArrayList<String>(endpoints.size());
for (InetAddress endpoint : endpoints) {
hosts.add(endpoint.getHostName());
}
return hosts;
}
private IColumn validateAndGetColumn(List<Row> rows, ByteBuffer columnName)
throws NotFoundException {
if (rows.isEmpty()) throw new NotFoundException();
if (rows.size() > 1) throw new RuntimeException("Block id returned more than one row");
Row row = rows.get(0);
if (row.cf == null) throw new NotFoundException();
IColumn col = row.cf.getColumn(columnName);
if (col == null || !col.isLive()) throw new NotFoundException();
return col;
}
public List<List<String>> describe_keys(String keyspace, List<ByteBuffer> keys)
throws TException {
List<List<String>> keyEndpoints = new ArrayList<List<String>>(keys.size());
for (ByteBuffer key : keys) {
keyEndpoints.add(getKeyLocations(key));
}
return keyEndpoints;
}
@Override
public String toString() {
return "#<Client for " + endpoints.toString() + ">";
}