Examples with CommitLogSegmentFileComparator org.apache.cassandra.db.commitlog.CommitLogSegment.CommitLogSegmentFileComparator used on opensource projects

Example 1 with CommitLogSegmentFileComparator

use of org.apache.cassandra.db.commitlog.CommitLogSegment.CommitLogSegmentFileComparator in project cassandra by apache.

the class CommitLog method recoverSegmentsOnDisk.

/**
 * Perform recovery on commit logs located in the directory specified by the config file.
 *
 * @return the number of mutations replayed
 * @throws IOException
 */
public int recoverSegmentsOnDisk() throws IOException {
    BiPredicate<File, String> unmanagedFilesFilter = (dir, name) -> CommitLogDescriptor.isValid(name) && CommitLogSegment.shouldReplay(name);
    // archiving pass, which we should not treat as serious.
    for (File file : new File(segmentManager.storageDirectory).tryList(unmanagedFilesFilter)) {
        archiver.maybeArchive(file.path(), file.name());
        archiver.maybeWaitForArchiving(file.name());
    }
    assert archiver.archivePending.isEmpty() : "Not all commit log archive tasks were completed before restore";
    archiver.maybeRestoreArchive();
    // List the files again as archiver may have added segments.
    File[] files = new File(segmentManager.storageDirectory).tryList(unmanagedFilesFilter);
    int replayed = 0;
    if (files.length == 0) {
        logger.info("No commitlog files found; skipping replay");
    } else {
        Arrays.sort(files, new CommitLogSegmentFileComparator());
        logger.info("Replaying {}", StringUtils.join(files, ", "));
        replayed = recoverFiles(files);
        logger.info("Log replay complete, {} replayed mutations", replayed);
        for (File f : files) segmentManager.handleReplayedSegment(f);
    }
    return replayed;
}