@Override
protected boolean claimFifoEntry(byte[] row, byte[] value, byte[] oldValue) throws IOException {
Put put = new Put(keyDistributor.getDistributedKey(row));
put.add(QueueEntryRow.COLUMN_FAMILY, stateColumnName, value);
return hTable.checkAndPut(
put.getRow(), QueueEntryRow.COLUMN_FAMILY, stateColumnName, oldValue, put);
}
@Override
protected void undoState(Iterable<byte[]> rows, int size) throws IOException {
List<Delete> deletes = Lists.newArrayListWithCapacity(size);
for (byte[] row : rows) {
Delete delete = new Delete(keyDistributor.getDistributedKey(row));
delete.deleteColumns(QueueEntryRow.COLUMN_FAMILY, stateColumnName);
deletes.add(delete);
}
hTable.delete(deletes);
hTable.flushCommits();
}
@Override
protected void updateState(Iterable<byte[]> rows, int size, byte[] value) throws IOException {
List<Put> puts = Lists.newArrayListWithCapacity(size);
for (byte[] row : rows) {
Put put = new Put(keyDistributor.getDistributedKey(row));
put.add(QueueEntryRow.COLUMN_FAMILY, stateColumnName, value);
puts.add(put);
}
hTable.put(puts);
hTable.flushCommits();
}