private List<String> getTags(
Keyspace keyspaceOperator,
String columnfamily,
String cfId,
String startRange,
String endRange) {
SliceQuery<String, String, String> query =
HFactory.createSliceQuery(
keyspaceOperator,
StringSerializer.get(),
StringSerializer.get(),
StringSerializer.get())
.setColumnFamily(columnfamily)
.setKey(cfId)
.setRange(TAG_COLUMN_MIN_NAME, TAG_COLUMN_MAX_NAME, false, Integer.MAX_VALUE);
QueryResult<ColumnSlice<String, String>> queryResult = query.execute();
ColumnSlice<String, String> columnSlice = queryResult.get();
SortedSet<String> tags = new TreeSet<String>();
for (HColumn<String, String> hColumn : columnSlice.getColumns()) {
tags.add(hColumn.getValue());
}
return new ArrayList<String>(tags);
}
/**
* Get Number of <String,String> type columns in a given row in a cassandra column family
*
* @param rowName row Name we are querying for
* @param columnFamilyName columnFamilName
* @param keyspace
* @param count
* @return
*/
public static ColumnSlice<String, String> getStringTypeColumnsInARow(
String rowName, String columnFamilyName, Keyspace keyspace, int count)
throws CassandraDataAccessException {
if (keyspace == null) {
throw new CassandraDataAccessException("Can't access Data , no keyspace provided ");
}
if (columnFamilyName == null || rowName == null) {
throw new CassandraDataAccessException(
"Can't access data with columnFamily = " + columnFamilyName + " and rowName=" + rowName);
}
try {
SliceQuery sliceQuery =
HFactory.createSliceQuery(keyspace, stringSerializer, stringSerializer, stringSerializer);
sliceQuery.setKey(rowName);
sliceQuery.setColumnFamily(columnFamilyName);
sliceQuery.setRange("", "", false, count);
QueryResult<ColumnSlice<String, String>> result = sliceQuery.execute();
ColumnSlice<String, String> columnSlice = result.get();
return columnSlice;
} catch (Exception e) {
throw new CassandraDataAccessException(
"Error while getting data from : " + columnFamilyName, e);
}
}
/**
* Get set of messages in a column family
*
* @param queueName QueueName
* @param columnFamilyName ColumnFamilyName
* @param keyspace Cassandra KeySpace
* @param count max message count limit
* @return ColumnSlice which contain the messages
* @throws CassandraDataAccessException
*/
public static ColumnSlice<Long, byte[]> getMessagesFromQueue(
String queueName, String columnFamilyName, Keyspace keyspace, int count)
throws CassandraDataAccessException {
if (keyspace == null) {
throw new CassandraDataAccessException("Can't access Data , no keyspace provided ");
}
if (columnFamilyName == null || queueName == null) {
throw new CassandraDataAccessException(
"Can't access data with columnFamily = "
+ columnFamilyName
+ " and queueName="
+ queueName);
}
try {
SliceQuery<String, Long, byte[]> sliceQuery =
HFactory.createSliceQuery(
keyspace, stringSerializer, longSerializer, bytesArraySerializer);
sliceQuery.setKey(queueName);
sliceQuery.setRange((long) 0, Long.MAX_VALUE, false, count);
sliceQuery.setColumnFamily(columnFamilyName);
QueryResult<ColumnSlice<Long, byte[]>> result = sliceQuery.execute();
ColumnSlice<Long, byte[]> columnSlice = result.get();
return columnSlice;
} catch (Exception e) {
throw new CassandraDataAccessException(
"Error while getting data from " + columnFamilyName, e);
}
}
/**
* Get List of Strings in a Given ROW in a Cassandra Column Family Here we assume that the columns
* in a given row have string data and key and value in the given column in that row have same
* values.
*
* @param columnFamilyName Name of the column Family
* @param rowName Row name
* @param keyspace keySpace
* @return List of string in that given row.
* @throws CassandraDataAccessException In case of database access error or data error
*/
public static List<String> getRowList(String columnFamilyName, String rowName, Keyspace keyspace)
throws CassandraDataAccessException {
ArrayList<String> rowList = new ArrayList<String>();
if (keyspace == null) {
throw new CassandraDataAccessException("Can't access Data , no keyspace provided ");
}
if (columnFamilyName == null || rowName == null) {
throw new CassandraDataAccessException(
"Can't access data with columnFamily =" + columnFamilyName + " and rowName=" + rowName);
}
try {
SliceQuery<String, String, String> sliceQuery =
HFactory.createSliceQuery(keyspace, stringSerializer, stringSerializer, stringSerializer);
sliceQuery.setKey(rowName);
sliceQuery.setColumnFamily(columnFamilyName);
sliceQuery.setRange("", "", false, 10000);
QueryResult<ColumnSlice<String, String>> result = sliceQuery.execute();
ColumnSlice<String, String> columnSlice = result.get();
for (HColumn<String, String> column : columnSlice.getColumns()) {
rowList.add(column.getName());
}
} catch (Exception e) {
throw new CassandraDataAccessException(
"Error while accessing data from :" + columnFamilyName, e);
}
return rowList;
}
@Override
public String getLastRevision(String executionPlanIdentifier) {
ColumnSlice<String, byte[]> cs;
String rangeStart =
new StringBuffer(String.valueOf(timeAt1970.getTime())).append("_").toString();
boolean firstLoop = true;
while (true) {
SliceQuery<String, String, byte[]> q = HFactory.createSliceQuery(keyspace, sser, sser, bser);
q.setColumnFamily(INDEX_COLUMN_FAMILY_NAME)
.setKey(executionPlanIdentifier)
.setRange(rangeStart, String.valueOf(Long.MAX_VALUE), false, 1000);
QueryResult<ColumnSlice<String, byte[]>> r = q.execute();
cs = r.get();
int size = cs.getColumns().size();
if (firstLoop && size == 0) {
return null;
} else if (size == 0) {
return rangeStart;
} else {
firstLoop = false;
}
int lastIndex = size - 1;
rangeStart = cs.getColumns().get(lastIndex).getName();
if (size < 1000) {
break;
}
}
log.info("found revision " + rangeStart);
return rangeStart;
}
@Override
public PersistenceObject load(
PersistenceManagementEvent persistenceManagementEvent, String nodeId) {
List<NodeSnapshot> list = new ArrayList<NodeSnapshot>();
ColumnSlice<String, byte[]> cs;
SliceQuery<String, String, byte[]> q = HFactory.createSliceQuery(keyspace, sser, sser, bser);
q.setColumnFamily(COLUMN_FAMILY_NAME)
.setKey(persistenceManagementEvent.getRevision())
.setRange("", "", false, 1000)
.setColumnNames(nodeId);
QueryResult<ColumnSlice<String, byte[]>> r = q.execute();
cs = r.get();
PersistenceObject persistenceObject = null;
for (HColumn<String, byte[]> hc : cs.getColumns()) {
persistenceObject = (PersistenceObject) ByteSerializer.BToO(hc.getValue());
// list.add(new NodeSnapshot(hc.getName(), hc.getValue()));
}
// return list;
return persistenceObject;
}
public Queue getQueue(String queuePath, UUID queueId) {
SliceQuery<UUID, String, ByteBuffer> q =
createSliceQuery(cass.getApplicationKeyspace(applicationId), ue, se, be);
q.setColumnFamily(QUEUE_PROPERTIES.getColumnFamily());
q.setKey(queueId);
q.setRange(null, null, false, ALL_COUNT);
QueryResult<ColumnSlice<String, ByteBuffer>> r = q.execute();
ColumnSlice<String, ByteBuffer> slice = r.get();
List<HColumn<String, ByteBuffer>> results = slice.getColumns();
return deserializeQueue(results);
}
@Override
public Message getMessage(UUID messageId) {
SliceQuery<UUID, String, ByteBuffer> q =
createSliceQuery(cass.getApplicationKeyspace(applicationId), ue, se, be);
q.setColumnFamily(MESSAGE_PROPERTIES.getColumnFamily());
q.setKey(messageId);
q.setRange(null, null, false, ALL_COUNT);
QueryResult<ColumnSlice<String, ByteBuffer>> r = q.execute();
ColumnSlice<String, ByteBuffer> slice = r.get();
List<HColumn<String, ByteBuffer>> results = slice.getColumns();
return deserializeMessage(results);
}
/* situation options:
* 1. ID:*:*
* 2. URN:*:*
* 3. ID:URN:*
* 4. URN:ID:*
*/
@Override
public Iterator<Node[]> queryVersioning(
Node[] query, int limit, String keyspace, int situation, String ID, String URN)
throws StoreException {
Iterator<Node[]> it = super.query(query, limit, keyspace);
if (it != null) {
return it;
}
String columnFamily = CF_S_PO;
int[] map = _maps.get(columnFamily);
Node[] q = Util.reorder(query, map);
// _log.info("query: " + Nodes.toN3(query) + " idx: " + columnFamily + " reordered: " +
// Nodes.toN3(q));
if (isVariable(q[0])) {
// scan over all
throw new UnsupportedOperationException("triple patterns must have at least one constant");
} else {
// SPO cf has one node as key and two nodes as colname
Node[] nxKey = getQueryKeyBySituation(q[0], situation);
String key_ID = nxKey[0].toN3();
int colNameTupleLength = 2;
// check ID and get the latest if neccessary
if (ID != null && ID.contains("last") && URN != null)
/*ID = String.valueOf(lastVersioningNumber(keyspace,q[0].toString()
, URN));*/
ID = lastCommitTxID(keyspace, q[0].toString());
/* TM: query composite */
SliceQuery<String, Composite, String> query_comp =
HFactory.createSliceQuery(
getExistingKeyspace(keyspace),
StringSerializer.get(),
CompositeSerializer.get(),
StringSerializer.get());
Composite columnStart = getCompositeStart(ID, URN, situation, q);
Composite columnEnd = getCompositeEnd(ID, URN, situation, q);
query_comp.setColumnFamily(columnFamily).setKey(key_ID);
/*_log.info("QUERY COMPOSITE ...on CF " + columnFamily + "..... on key " + key_ID);
_log.info("QUERY COMPOSITE " + Nodes.toN3(q) + "--" + Nodes.toN3(new Node[] {q[1], q[2]})) ;
_log.info("QUERY COMPOSITE situation: " + situation );*/
// use the extended map
map = _maps_ext.get(columnFamily);
it =
new ColumnSliceIteratorComposite<String>(
query_comp, nxKey, columnStart, columnEnd, map, limit, colNameTupleLength, query);
}
return it;
}
@Override
public Set<String> getQueueCounterNames(String queuePath) throws Exception {
Set<String> names = new HashSet<String>();
Keyspace ko = cass.getApplicationKeyspace(applicationId);
SliceQuery<String, String, ByteBuffer> q = createSliceQuery(ko, se, se, be);
q.setColumnFamily(QueuesCF.QUEUE_DICTIONARIES.toString());
q.setKey(CassandraPersistenceUtils.key(getQueueId(queuePath), DICTIONARY_COUNTERS).toString());
q.setRange(null, null, false, ALL_COUNT);
List<HColumn<String, ByteBuffer>> columns = q.execute().get().getColumns();
for (HColumn<String, ByteBuffer> column : columns) {
names.add(column.getName());
}
return names;
}
CompositeQueryIterator(String key, Composite start, Composite end) {
this.key = key;
this.start = start;
this.end = end;
SliceQuery<String, Composite, String> sliceQuery =
HFactory.createSliceQuery(
tutorialKeyspace,
StringSerializer.get(),
new CompositeSerializer(),
StringSerializer.get());
sliceQuery.setColumnFamily("CountryStateCity");
sliceQuery.setKey(key);
sliceIterator = new ColumnSliceIterator(sliceQuery, start, end, false);
}
public PlaceLogRecord findPlaceLogRecord(String id) {
if (id == null) return null;
SliceQuery<UUID, String, String> q =
HFactory.createSliceQuery(KeyspaceFactory.get(), us, ss, ss);
q.setColumnFamily(PLACE_LOG_RECORD)
.setKey(UUID.fromString(id))
.setColumnNames("url", "app_version", "user_agent", "log_level", "username");
QueryResult<ColumnSlice<String, String>> r = q.execute();
PlaceLogRecord record = new PlaceLogRecord();
record.setId(id);
record.setVersion(0);
record.setAppVersion(getString(r.get().getColumnByName("app_version")));
record.setLogLevel(getString(r.get().getColumnByName("log_level")));
record.setUrl(getString(r.get().getColumnByName("url")));
record.setUserAgent(getString(r.get().getColumnByName("user_agent")));
record.setUsername(getString(r.get().getColumnByName("username")));
return record;
}
@Override
public Iterator<HColumn<String, String>> queryBrigesTimeStats(
Node[] query, String keyspace, String start_time, String end_time) throws StoreException {
// SPO, OSP cfs have one node as key and two nodes as colname
Node[] nxKey = new Node[] {query[0]};
String key = query[0].toN3();
int colNameTupleLength = 1;
SliceQuery<String, String, String> sq =
HFactory.createSliceQuery(getExistingKeyspace(keyspace), _ss, _ss, _ss)
.setColumnFamily(CF_S_PO)
.setRange(start_time, end_time, false, Integer.MAX_VALUE)
.setKey(key);
QueryResult<ColumnSlice<String, String>> results = sq.execute();
List<HColumn<String, String>> columns = results.get().getColumns();
Iterator<HColumn<String, String>> it_columns = columns.iterator();
return it_columns;
}
@PreAuthorize("hasRole('ROLE_ADMINISTRATOR')")
public List<PlaceLogRecord> findPlaceLogRecordsByUsername(
String username, Long startKey, Integer count) {
if (username == null || username.isEmpty()) return null;
SliceQuery<String, Long, UUID> q1 =
HFactory.createSliceQuery(KeyspaceFactory.get(), ss, ls, us);
q1.setColumnFamily(PLACE_LOG_RECORD_TIMELINE)
.setKey(username)
.setRange(startKey, null, true, count);
QueryResult<ColumnSlice<Long, UUID>> r1 = q1.execute();
List<PlaceLogRecord> records = new ArrayList<PlaceLogRecord>();
for (HColumn<Long, UUID> column : r1.get().getColumns()) {
PlaceLogRecord record = new PlaceLogRecord();
record = findPlaceLogRecord(column.getValue().toString());
record.setTimestamp(column.getName());
records.add(record);
}
return records;
}
public void runQuery() throws IOException {
MultigetSliceQuery<DataPointsRowKey, Integer, ByteBuffer> msliceQuery =
HFactory.createMultigetSliceQuery(
m_keyspace, ROW_KEY_SERIALIZER, IntegerSerializer.get(), ByteBufferSerializer.get());
msliceQuery.setColumnFamily(m_columnFamily);
msliceQuery.setKeys(m_rowKeys);
if (m_descending) msliceQuery.setRange(m_endTime, m_startTime, true, m_multiRowReadSize);
else msliceQuery.setRange(m_startTime, m_endTime, false, m_multiRowReadSize);
Rows<DataPointsRowKey, Integer, ByteBuffer> rows = msliceQuery.execute().get();
List<Row<DataPointsRowKey, Integer, ByteBuffer>> unfinishedRows =
new ArrayList<Row<DataPointsRowKey, Integer, ByteBuffer>>();
for (Row<DataPointsRowKey, Integer, ByteBuffer> row : rows) {
List<HColumn<Integer, ByteBuffer>> columns = row.getColumnSlice().getColumns();
if (!m_limit && columns.size() == m_multiRowReadSize) unfinishedRows.add(row);
writeColumns(row.getKey(), columns);
}
// Iterate through the unfinished rows and get the rest of the data.
// todo: use multiple threads to retrieve this data
for (Row<DataPointsRowKey, Integer, ByteBuffer> unfinishedRow : unfinishedRows) {
DataPointsRowKey key = unfinishedRow.getKey();
SliceQuery<DataPointsRowKey, Integer, ByteBuffer> sliceQuery =
HFactory.createSliceQuery(
m_keyspace, ROW_KEY_SERIALIZER, IntegerSerializer.get(), ByteBufferSerializer.get());
sliceQuery.setColumnFamily(m_columnFamily);
sliceQuery.setKey(key);
List<HColumn<Integer, ByteBuffer>> columns = unfinishedRow.getColumnSlice().getColumns();
do {
Integer lastTime = columns.get(columns.size() - 1).getName();
if (m_descending) sliceQuery.setRange(lastTime - 1, m_startTime, true, m_singleRowReadSize);
else sliceQuery.setRange(lastTime + 1, m_endTime, false, m_singleRowReadSize);
columns = sliceQuery.execute().get().getColumns();
writeColumns(key, columns);
} while (columns.size() == m_singleRowReadSize);
}
}
@Override
public Iterator<Node[]> query(Node[] query, int limit, String keyspace) throws StoreException {
Iterator<Node[]> it = super.query(query, limit, keyspace);
if (it != null) {
return it;
}
String columnFamily = selectColumnFamily(query);
int[] map = _maps.get(columnFamily);
Node[] q = Util.reorder(query, map);
// _log.info("query: " + Nodes.toN3(query) + " idx: " + columnFamily + " reordered: " +
// Nodes.toN3(q));
if (isVariable(q[0])) {
// scan over all
throw new UnsupportedOperationException("triple patterns must have at least one constant");
} else {
if (columnFamily.equals(CF_PO_S)) {
if (isVariable(q[1])) {
// we use a secondary index for P only when no other constant is given
IndexedSlicesQuery<byte[], String, String> isq =
HFactory.createIndexedSlicesQuery(getExistingKeyspace(keyspace), _bs, _ss, _ss)
.setColumnFamily(columnFamily)
.addEqualsExpression("!p", q[0].toN3())
.setReturnKeysOnly();
it =
new HashIndexedSlicesQueryIterator(
isq, map, limit, columnFamily, getExistingKeyspace(keyspace));
} else {
// here we always have a PO lookup, POS (=SPO) is handled by OSP or SPO
// we retrieve all columns from a single row
// in POS the keys are hashes, we retrieve P and O from columns !p and !o
ByteBuffer key = createKey(new Node[] {q[0], q[1]});
SliceQuery<byte[], String, String> sq =
HFactory.createSliceQuery(getExistingKeyspace(keyspace), _bs, _ss, _ss)
.setColumnFamily(columnFamily)
.setKey(key.array())
.setRange("!o", "!p", false, 2);
QueryResult<ColumnSlice<String, String>> res = sq.execute();
if (res.get().getColumns().size() == 0) return new ArrayList<Node[]>().iterator();
Node[] nxKey = new Node[2];
try {
nxKey[0] = NxParser.parseNode(res.get().getColumnByName("!p").getValue());
nxKey[1] = NxParser.parseNode(res.get().getColumnByName("!o").getValue());
} catch (ParseException e) {
e.printStackTrace();
}
it = new ColumnSliceIterator<byte[]>(sq, nxKey, "<", "", map, limit, 1);
}
} else {
String startRange = "", endRange = "";
if (!isVariable(q[1])) {
// if there is more than one constant, we need to modify the range
startRange = q[1].toN3();
endRange = startRange + "_";
if (!isVariable(q[2])) {
startRange = Nodes.toN3(new Node[] {q[1], q[2]});
endRange = startRange;
}
}
// SPO, OSP cfs have one node as key and two nodes as colname
Node[] nxKey = new Node[] {q[0]};
String key = q[0].toN3();
int colNameTupleLength = 2;
SliceQuery<String, String, String> sq =
HFactory.createSliceQuery(getExistingKeyspace(keyspace), _ss, _ss, _ss)
.setColumnFamily(columnFamily)
.setKey(key);
it =
new ColumnSliceIterator<String>(
sq, nxKey, startRange, endRange, map, limit, colNameTupleLength);
}
}
return it;
}
/**
* Get a list of UUIDs that can be read for the client. This comes directly from the queue inbox,
* and DOES NOT take into account client messages
*
* @param queueId The queue id to read
* @param bounds The bounds to use when reading
* @return
*/
protected List<UUID> getQueueRange(UUID queueId, QueueBounds bounds, SearchParam params) {
if (bounds == null) {
logger.error("Necessary queue bounds not found");
throw new QueueException("Neccessary queue bounds not found");
}
UUID finish_uuid = params.reversed ? bounds.getOldest() : bounds.getNewest();
List<UUID> results = new ArrayList<UUID>(params.limit);
UUID start = params.startId;
if (start == null) {
start = params.reversed ? bounds.getNewest() : bounds.getOldest();
}
if (start == null) {
logger.error("No first message in queue");
return results;
}
if (finish_uuid == null) {
logger.error("No last message in queue");
return results;
}
long start_ts_shard = roundLong(getTimestampInMillis(start), QUEUE_SHARD_INTERVAL);
long finish_ts_shard = roundLong(getTimestampInMillis(finish_uuid), QUEUE_SHARD_INTERVAL);
long current_ts_shard = start_ts_shard;
if (params.reversed) {
current_ts_shard = finish_ts_shard;
}
while ((current_ts_shard >= start_ts_shard) && (current_ts_shard <= finish_ts_shard)) {
UUID slice_start = MIN_TIME_UUID;
UUID slice_end = MAX_TIME_UUID;
if (current_ts_shard == start_ts_shard) {
slice_start = start;
}
if (current_ts_shard == finish_ts_shard) {
slice_end = finish_uuid;
}
SliceQuery<ByteBuffer, UUID, ByteBuffer> q = createSliceQuery(ko, be, ue, be);
q.setColumnFamily(QUEUE_INBOX.getColumnFamily());
q.setKey(getQueueShardRowKey(queueId, current_ts_shard));
q.setRange(slice_start, slice_end, params.reversed, params.limit + 1);
List<HColumn<UUID, ByteBuffer>> cassResults = q.execute().get().getColumns();
for (int i = 0; i < cassResults.size(); i++) {
HColumn<UUID, ByteBuffer> column = cassResults.get(i);
// skip the first one, we've already read it
if (i == 0 && params.skipFirst && params.startId.equals(column.getName())) {
continue;
}
UUID id = column.getName();
results.add(id);
logger.debug("Added id '{}' to result set for queue id '{}'", id, queueId);
if (results.size() >= params.limit) {
return results;
}
}
if (params.reversed) {
current_ts_shard -= QUEUE_SHARD_INTERVAL;
} else {
current_ts_shard += QUEUE_SHARD_INTERVAL;
}
}
return results;
}
