Example usage for org.apache.cassandra.db.lifecycle SSTableSet CANONICAL

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Prototype

SSTableSet CANONICAL

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Usage

From source file:com.jeffjirsa.cassandra.db.compaction.TimeWindowCompactionStrategy.java

License:Apache License

/**
 *
 * @param gcBefore/*from ww  w  . ja  va  2  s  .c  o m*/
 * @return
 */
private List<SSTableReader> getNextBackgroundSSTables(final int gcBefore) {
    if (Iterables.isEmpty(cfs.getSSTables(SSTableSet.LIVE)))
        return Collections.emptyList();

    Set<SSTableReader> uncompacting = ImmutableSet
            .copyOf(filter(cfs.getUncompactingSSTables(), sstables::contains));

    // Find fully expired SSTables. Those will be included no matter what.
    Set<SSTableReader> expired = Collections.emptySet();

    if (System.currentTimeMillis() - lastExpiredCheck > options.expiredSSTableCheckFrequency) {
        logger.debug("TWCS expired check sufficiently far in the past, checking for fully expired SSTables");
        expired = CompactionController.getFullyExpiredSSTables(cfs, uncompacting,
                cfs.getOverlappingSSTables(SSTableSet.CANONICAL, uncompacting), gcBefore);
        lastExpiredCheck = System.currentTimeMillis();
    } else {
        logger.debug("TWCS skipping check for fully expired SSTables");
    }

    Set<SSTableReader> candidates = Sets.newHashSet(filterSuspectSSTables(uncompacting));

    List<SSTableReader> compactionCandidates = new ArrayList<>(
            getNextNonExpiredSSTables(Sets.difference(candidates, expired), gcBefore));
    if (!expired.isEmpty()) {
        logger.debug("Including expired sstables: {}", expired);
        compactionCandidates.addAll(expired);
    }

    return compactionCandidates;
}

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