Examples with LongPredicate java.util.function.LongPredicate used on opensource projects

Example 21 with LongPredicate

use of java.util.function.LongPredicate in project bboxdb by jnidzwetzki.

the class SSTableCheckpointRunnable method isCheckpointNeeded.

/**
 * Decide if a new checkpoint is needed
 * @return
 */
protected boolean isCheckpointNeeded(final TupleStoreManager ssTableManager) {
    final List<ReadOnlyTupleStore> inMemoryStores = ssTableManager.getAllInMemoryStorages();
    if (inMemoryStores.isEmpty()) {
        return false;
    }
    final long currentTime = System.currentTimeMillis();
    // The checkpoint predicate
    final LongPredicate checkpointPredicate = m -> {
        final long checkpointThreshold = TimeUnit.MICROSECONDS.toMillis(m) + maxUncheckpointedMiliseconds;
        return checkpointThreshold < currentTime;
    };
    final boolean checkpointNeeded = inMemoryStores.stream().filter(Objects::nonNull).mapToLong(m -> m.getOldestTupleVersionTimestamp()).anyMatch(checkpointPredicate);
    logger.debug("Checkpoint for {} needed {}", ssTableManager.getTupleStoreName().getFullname(), checkpointNeeded);
    return checkpointNeeded;
}