@Override
public QueueSet searchSubscribers(String publisherQueuePath, Query query) {
if (query == null) {
query = new Query();
}
publisherQueuePath = normalizeQueuePath(publisherQueuePath);
UUID publisherQueueId = getQueueId(publisherQueuePath);
if (!query.hasFilterPredicates() && !query.hasSortPredicates()) {
return getSubscribers(publisherQueuePath, null, query.getLimit());
}
QueueSet results = null;
String composite_cursor = null;
QueryProcessor qp = new QueryProcessor(query);
List<QuerySlice> slices = qp.getSlices();
int search_count = query.getLimit() + 1;
if (slices.size() > 1) {
search_count = DEFAULT_SEARCH_COUNT;
}
for (QuerySlice slice : slices) {
QueueSet r = null;
try {
r = searchQueueIndex(publisherQueueId, slice, search_count);
} catch (Exception e) {
logger.error("Error during search", e);
}
if (r == null) {
continue;
}
if (r.size() > query.getLimit()) {
r.setCursorToLastResult();
}
if (r.getCursor() != null) {
if (composite_cursor != null) {
composite_cursor += "|";
} else {
composite_cursor = "";
}
int hashCode = slice.hashCode();
logger.info("Cursor hash code: {} ", hashCode);
composite_cursor += hashCode + ":" + r.getCursor();
}
if (results != null) {
results.and(r);
} else {
results = r;
}
}
return results;
}
public QueueSet searchQueueIndex(UUID publisherQueueId, QuerySlice slice, int count)
throws Exception {
ByteBuffer start = null;
if (slice.getCursor() != null) {
start = slice.getCursor();
} else if (slice.getStart() != null) {
DynamicComposite s =
new DynamicComposite(slice.getStart().getCode(), slice.getStart().getValue());
if (!slice.getStart().isInclusive()) {
setEqualityFlag(s, ComponentEquality.GREATER_THAN_EQUAL);
}
start = s.serialize();
}
ByteBuffer finish = null;
if (slice.getFinish() != null) {
DynamicComposite f =
new DynamicComposite(slice.getFinish().getCode(), slice.getFinish().getValue());
if (slice.getFinish().isInclusive()) {
setEqualityFlag(f, ComponentEquality.GREATER_THAN_EQUAL);
}
finish = f.serialize();
}
if (slice.isReversed() && (start != null) && (finish != null)) {
ByteBuffer temp = start;
start = finish;
finish = temp;
}
List<HColumn<ByteBuffer, ByteBuffer>> results =
createSliceQuery(cass.getApplicationKeyspace(applicationId), be, be, be)
.setColumnFamily(PROPERTY_INDEX.getColumnFamily())
.setKey(bytebuffer(key(publisherQueueId, slice.getPropertyName())))
.setRange(start, finish, slice.isReversed(), count)
.execute()
.get()
.getColumns();
QueueSet queues = new QueueSet();
for (HColumn<ByteBuffer, ByteBuffer> column : results) {
DynamicComposite c = DynamicComposite.fromByteBuffer(column.getName());
queues.addQueue(c.get(3, se), c.get(2, ue));
}
return queues;
}
