@Override
public void removeValuesUnusedLongerThan(long minimumAge, TimeUnit unit)
throws BinaryStoreException {
try {
Date deadline = new Date(new Date().getTime() - unit.toMillis(minimumAge));
// When querying using 2nd indexes, Cassandra
// (it's not CQL specific) requires that you use an '=' for at least one of
// the indexed column in the where clause. This is a limitation of Cassandra.
// So we have to do some tricks here
ResultSet rs =
session.execute(
"SELECT cid from modeshape.binary where usage=0 and usage_time < "
+ deadline.getTime()
+ " allow filtering;");
Iterator<Row> rows = rs.iterator();
while (rows.hasNext()) {
session.execute(
"DELETE from modeshape.binary where cid = '" + rows.next().getString("cid") + "';");
}
rs =
session.execute(
"SELECT cid from modeshape.binary where usage=1 and usage_time < "
+ deadline.getTime()
+ " allow filtering;");
rows = rs.iterator();
while (rows.hasNext()) {
session.execute(
"DELETE from modeshape.binary where cid = '" + rows.next().getString("cid") + "';");
}
} catch (RuntimeException e) {
throw new BinaryStoreException(e);
}
}
////////////////////////////////////
// Overridden Methods for IBackingMap
////////////////////////////////////
@SuppressWarnings("unchecked")
@Override
public List<T> multiGet(List<List<Object>> keys) {
try {
List<T> values = new ArrayList<T>();
for (List<Object> rowKey : keys) {
Statement statement = mapper.retrieve(rowKey);
ResultSet results = session.execute(statement);
// TODO: Better way to check for empty results besides accessing entire results list
Iterator<Row> rowIter = results.iterator();
Row row;
if (results != null && rowIter.hasNext() && (row = rowIter.next()) != null) {
if (rowIter.hasNext()) {
LOG.error("Found non-unique value for key [{}]", rowKey);
} else {
values.add((T) mapper.getValue(row));
}
} else {
values.add(null);
}
}
_mreads.incrBy(values.size());
LOG.debug("Retrieving the following keys: {} with values: {}", keys, values);
return values;
} catch (Exception e) {
checkCassandraException(e);
throw new IllegalStateException("Impossible to reach this code");
}
}
private void test() {
ResultSet result =
cassandraCQLUnit.session.execute(
"select * from testCQLTable WHERE id='1690e8da-5bf8-49e8-9583-4dff8a570737'");
String val = result.iterator().next().getString("value");
assertEquals("Cql loaded string", val);
}
/**
* Test content for existence.
*
* @param key content identifier
* @param alive true inside used content and false for checking within content marked as unused.
* @return true if content found
* @throws BinaryStoreException
*/
private boolean contentExists(BinaryKey key, boolean alive) throws BinaryStoreException {
try {
String query = "SELECT payload from modeshape.binary where cid='" + key.toString() + "'";
query = alive ? query + " and usage=1;" : query + " and usage = 0;";
ResultSet rs = session.execute(query);
return rs.iterator().hasNext();
} catch (RuntimeException e) {
throw new BinaryStoreException(e);
}
}
@Test
public void testTridentTopology() throws Exception {
Session session = cassandraCQLUnit.session;
String[] stationIds = {"station-1", "station-2", "station-3"};
for (int i = 1; i < 4; i++) {
ResultSet resultSet =
session.execute(
"INSERT INTO weather.station(id, name) VALUES(?, ?)",
stationIds[i - 1],
"Foo-Station-" + new Random().nextInt());
}
ResultSet rows = cassandraCQLUnit.session.execute("SELECT * FROM weather.station");
for (Row row : rows) {
System.out.println("####### row = " + row);
}
WeatherBatchSpout weatherBatchSpout =
new WeatherBatchSpout(
new Fields("weather_station_id", "temperature", "event_time"), 3, stationIds);
TridentTopology topology = new TridentTopology();
Stream stream = topology.newStream("cassandra-trident-stream", weatherBatchSpout);
CassandraStateFactory insertValuesStateFactory = getInsertTemperatureStateFactory();
CassandraStateFactory selectWeatherStationStateFactory = getSelectWeatherStationStateFactory();
TridentState selectState = topology.newStaticState(selectWeatherStationStateFactory);
stream =
stream.stateQuery(
selectState,
new Fields("weather_station_id"),
new CassandraQuery(),
new Fields("name"));
stream = stream.each(new Fields("name"), new PrintFunction(), new Fields("name_x"));
stream.partitionPersist(
insertValuesStateFactory,
new Fields("weather_station_id", "name", "event_time", "temperature"),
new CassandraStateUpdater(),
new Fields());
StormTopology stormTopology = topology.build();
LocalCluster cluster = new LocalCluster();
cluster.submitTopology("wordCounter", getConfig(), stormTopology);
Thread.sleep(30 * 1000);
rows = cassandraCQLUnit.session.execute("SELECT * FROM weather.temperature");
Assert.assertTrue(rows.iterator().hasNext()); // basic sanity check
cluster.killTopology("wordCounter");
cluster.shutdown();
}
@Override
public Iterable<BinaryKey> getAllBinaryKeys() throws BinaryStoreException {
try {
ResultSet rs = session.execute("SELECT cid from modeshape.binary WHERE usage=1;");
Iterator<Row> it = rs.iterator();
HashSet<BinaryKey> keys = new HashSet<BinaryKey>();
while (it.hasNext()) {
keys.add(new BinaryKey(it.next().getString("cid")));
}
return keys;
} catch (RuntimeException e) {
throw new BinaryStoreException(e);
}
}
private Row getRow(ResultSet resultSet) {
Iterator<Row> iterator = resultSet.iterator();
if (!iterator.hasNext()) {
return null;
}
Row firstRow = iterator.next();
if (singleResult && iterator.hasNext()) {
throw new CassandraNotSingleResultException(resultSet);
}
return firstRow;
}
