public static List<String> getDestinationQueueNamesFromCounterColumns(
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 {
SliceCounterQuery<String, String> sliceQuery =
HFactory.createCounterSliceQuery(keyspace, stringSerializer, stringSerializer);
sliceQuery.setKey(rowName);
sliceQuery.setColumnFamily(columnFamilyName);
sliceQuery.setRange("", "", false, Integer.MAX_VALUE);
QueryResult<CounterSlice<String>> result = sliceQuery.execute();
CounterSlice<String> columnSlice = result.get();
for (HCounterColumn<String> column : columnSlice.getColumns()) {
rowList.add(column.getName());
}
} catch (Exception e) {
throw new CassandraDataAccessException(
"Error while accessing data from :" + columnFamilyName, e);
}
return rowList;
}
public Map<String, Long> getQueueCounters(UUID queueId) throws Exception {
Map<String, Long> counters = new HashMap<String, Long>();
Keyspace ko = cass.getApplicationKeyspace(applicationId);
SliceCounterQuery<UUID, String> q = createCounterSliceQuery(ko, ue, se);
q.setColumnFamily(COUNTERS.getColumnFamily());
q.setRange(null, null, false, ALL_COUNT);
QueryResult<CounterSlice<String>> r = q.setKey(queueId).execute();
for (HCounterColumn<String> column : r.get().getColumns()) {
counters.put(column.getName(), column.getValue());
}
return counters;
}
public AggregateCounterSet getAggregateCounters(
UUID queueId,
String category,
String counterName,
CounterResolution resolution,
long start,
long finish,
boolean pad) {
start = resolution.round(start);
finish = resolution.round(finish);
long expected_time = start;
Keyspace ko = cass.getApplicationKeyspace(applicationId);
SliceCounterQuery<String, Long> q = createCounterSliceQuery(ko, se, le);
q.setColumnFamily(APPLICATION_AGGREGATE_COUNTERS.getColumnFamily());
q.setRange(start, finish, false, ALL_COUNT);
QueryResult<CounterSlice<Long>> r =
q.setKey(
counterUtils.getAggregateCounterRow(
counterName, null, null, queueId, category, resolution))
.execute();
List<AggregateCounter> counters = new ArrayList<AggregateCounter>();
for (HCounterColumn<Long> column : r.get().getColumns()) {
AggregateCounter count = new AggregateCounter(column.getName(), column.getValue());
if (pad && !(resolution == CounterResolution.ALL)) {
while (count.getTimestamp() != expected_time) {
counters.add(new AggregateCounter(expected_time, 0));
expected_time = resolution.next(expected_time);
}
expected_time = resolution.next(expected_time);
}
counters.add(count);
}
if (pad && !(resolution == CounterResolution.ALL)) {
while (expected_time <= finish) {
counters.add(new AggregateCounter(expected_time, 0));
expected_time = resolution.next(expected_time);
}
}
return new AggregateCounterSet(counterName, queueId, category, counters);
}