Examples with IndexStatus herddb.storage.IndexStatus used on opensource projects

Example 11 with IndexStatus

use of herddb.storage.IndexStatus in project herddb by diennea.

the class MemoryHashIndexManager method checkpoint.

@Override
public List<PostCheckpointAction> checkpoint(LogSequenceNumber sequenceNumber, boolean pin) throws DataStorageManagerException {
    if (createdInTransaction > 0) {
        LOGGER.log(Level.INFO, "checkpoint for index " + index.name + " skipped, this index is created on transaction " + createdInTransaction + " which is not committed");
        return Collections.emptyList();
    }
    List<PostCheckpointAction> result = new ArrayList<>();
    LOGGER.log(Level.INFO, "flush index {0}", new Object[] { index.name });
    long pageId = newPageId.getAndIncrement();
    Holder<Long> count = new Holder<>();
    dataStorageManager.writeIndexPage(tableSpaceUUID, index.uuid, pageId, (out) -> {
        long entries = 0;
        // version
        out.writeVLong(1);
        // flags for future implementations
        out.writeVLong(0);
        out.writeVInt(data.size());
        for (Map.Entry<Bytes, List<Bytes>> entry : data.entrySet()) {
            out.writeArray(entry.getKey());
            List<Bytes> entrydata = entry.getValue();
            out.writeVInt(entrydata.size());
            for (Bytes v : entrydata) {
                out.writeArray(v);
                ++entries;
            }
        }
        count.value = entries;
    });
    IndexStatus indexStatus = new IndexStatus(index.name, sequenceNumber, newPageId.get(), Collections.singleton(pageId), null);
    result.addAll(dataStorageManager.indexCheckpoint(tableSpaceUUID, index.uuid, indexStatus, pin));
    LOGGER.log(Level.INFO, "checkpoint index {0} finished: logpos {1}, {2} entries, page {3}", new Object[] { index.name, sequenceNumber, Long.toString(count.value), Long.toString(pageId) });
    return result;
}