public static Entry<Key, Value> checkColumn(
Environment env, IteratorSetting iterConf, Bytes row, Column col) {
Span span = Span.exact(row, col);
Scanner scanner;
try {
// TODO reuse or share scanner
scanner = env.getConnector().createScanner(env.getTable(), env.getAuthorizations());
} catch (TableNotFoundException e) {
// TODO proper exception handling
throw new RuntimeException(e);
}
scanner.setRange(SpanUtil.toRange(span));
scanner.addScanIterator(iterConf);
Iterator<Entry<Key, Value>> iter = scanner.iterator();
if (iter.hasNext()) {
Entry<Key, Value> entry = iter.next();
Key k = entry.getKey();
Bytes r = Bytes.of(k.getRowData().toArray());
Bytes cf = Bytes.of(k.getColumnFamilyData().toArray());
Bytes cq = Bytes.of(k.getColumnQualifierData().toArray());
Bytes cv = Bytes.of(k.getColumnVisibilityData().toArray());
if (r.equals(row)
&& cf.equals(col.getFamily())
&& cq.equals(col.getQualifier())
&& cv.equals(col.getVisibility())) {
return entry;
} else {
throw new RuntimeException("unexpected key " + k + " " + row + " " + col);
}
}
return null;
}
public static long getNotificationTS(Environment env, String row, Column col) {
Scanner scanner;
try {
scanner = env.getConnector().createScanner(env.getTable(), env.getAuthorizations());
} catch (TableNotFoundException e) {
throw new RuntimeException(e);
}
IteratorSetting iterCfg = new IteratorSetting(11, NotificationIterator.class);
scanner.addScanIterator(iterCfg);
Text cv = ByteUtil.toText(col.getVisibility());
scanner.setRange(SpanUtil.toRange(Span.prefix(row)));
scanner.fetchColumn(
ByteUtil.toText(ColumnConstants.NOTIFY_CF), new Text(NotificationUtil.encodeCol(col)));
for (Entry<Key, org.apache.accumulo.core.data.Value> entry : scanner) {
if (entry.getKey().getColumnVisibility().equals(cv)) {
return Notification.from(entry.getKey()).getTimestamp();
}
}
throw new RuntimeException("No notification found");
}
public static void writeColumn(Column col, DataOutputStream out) throws IOException {
ByteUtil.write(out, col.getFamily());
ByteUtil.write(out, col.getQualifier());
ByteUtil.write(out, col.getVisibility());
}