Examples with CellName org.apache.cassandra.db.composites.CellName used on opensource projects

Example 11 with CellName

use of org.apache.cassandra.db.composites.CellName in project janusgraph by JanusGraph.

the class CassandraEmbeddedStoreManager method retryDummyRead.

private void retryDummyRead(String ks, String cf) throws PermanentBackendException {
    final long limit = System.currentTimeMillis() + (60L * 1000L);
    while (System.currentTimeMillis() < limit) {
        try {
            // This is a singleton set.  We need to define a comparator because SimpleDenseCellName is not
            // comparable, but the comparator that we pass into the TreeSet constructor does not have to be useful
            final SortedSet<CellName> names = new TreeSet<>((o1, o2) -> 0);
            names.add(CellNames.simpleDense(ByteBufferUtil.zeroByteBuffer(1)));
            NamesQueryFilter nqf = new NamesQueryFilter(names);
            final SliceByNamesReadCommand cmd = new SliceByNamesReadCommand(ks, ByteBufferUtil.zeroByteBuffer(1), cf, 1L, nqf);
            StorageProxy.read(ImmutableList.of(cmd), ConsistencyLevel.QUORUM);
            log.info("Read on CF {} in KS {} succeeded", cf, ks);
            return;
        } catch (Throwable t) {
            log.warn("Failed to read CF {} in KS {} following creation", cf, ks, t);
        }
        try {
            Thread.sleep(1000L);
        } catch (InterruptedException e) {
            throw new PermanentBackendException(e);
        }
    }
    throw new PermanentBackendException("Timed out while attempting to read CF " + cf + " in KS " + ks + " following creation");
}