private void testDontPurgeAccidentaly(String k, String cfname) throws InterruptedException {
// This test catches the regression of CASSANDRA-2786
Keyspace keyspace = Keyspace.open(KEYSPACE1);
ColumnFamilyStore cfs = keyspace.getColumnFamilyStore(cfname);
// disable compaction while flushing
cfs.clearUnsafe();
cfs.disableAutoCompaction();
// Add test row
DecoratedKey key = Util.dk(k);
Mutation rm = new Mutation(KEYSPACE1, key.getKey());
rm.add(
cfname,
Util.cellname(ByteBufferUtil.bytes("sc"), ByteBufferUtil.bytes("c")),
ByteBufferUtil.EMPTY_BYTE_BUFFER,
0);
rm.applyUnsafe();
cfs.forceBlockingFlush();
Collection<SSTableReader> sstablesBefore = cfs.getSSTables();
QueryFilter filter = QueryFilter.getIdentityFilter(key, cfname, System.currentTimeMillis());
assertTrue(cfs.getColumnFamily(filter).hasColumns());
// Remove key
rm = new Mutation(KEYSPACE1, key.getKey());
rm.delete(cfname, 2);
rm.applyUnsafe();
ColumnFamily cf = cfs.getColumnFamily(filter);
assertTrue("should be empty: " + cf, cf == null || !cf.hasColumns());
// Sleep one second so that the removal is indeed purgeable even with gcgrace == 0
Thread.sleep(1000);
cfs.forceBlockingFlush();
Collection<SSTableReader> sstablesAfter = cfs.getSSTables();
Collection<SSTableReader> toCompact = new ArrayList<SSTableReader>();
for (SSTableReader sstable : sstablesAfter)
if (!sstablesBefore.contains(sstable)) toCompact.add(sstable);
Util.compact(cfs, toCompact);
cf = cfs.getColumnFamily(filter);
assertTrue("should be empty: " + cf, cf == null || !cf.hasColumns());
}
public boolean isFullyCoveredBy(ColumnFamily cf, long now) {
// cf is the beginning of a partition. It covers this filter if:
// 1) either this filter requests the head of the partition and request less
// than what cf has to offer (note: we do need to use getLiveCount() for that
// as it knows if the filter count cells or CQL3 rows).
// 2) the start and finish bound of this filter are included in cf.
if (isHeadFilter() && count <= getLiveCount(cf, now)) return true;
if (start().isEmpty() || finish().isEmpty() || !cf.hasColumns()) return false;
Composite low = isReversed() ? finish() : start();
Composite high = isReversed() ? start() : finish();
CellName first = cf.iterator(ColumnSlice.ALL_COLUMNS_ARRAY).next().name();
CellName last = cf.reverseIterator(ColumnSlice.ALL_COLUMNS_ARRAY).next().name();
return cf.getComparator().compare(first, low) <= 0
&& cf.getComparator().compare(high, last) <= 0;
}