Examples with VERSION_TRAILERS org.neo4j.kernel.impl.store.format.Capability.VERSION_TRAILERS used on opensource projects

Example 1 with VERSION_TRAILERS

use of org.neo4j.kernel.impl.store.format.Capability.VERSION_TRAILERS in project neo4j by neo4j.

the class StoreMigrator method moveMigratedFiles.

@Override
public void moveMigratedFiles(File migrationDir, File storeDir, String versionToUpgradeFrom, String versionToUpgradeTo) throws IOException {
    // Move the migrated ones into the store directory
    StoreFile.fileOperation(MOVE, fileSystem, migrationDir, storeDir, StoreFile.currentStoreFiles(), // allow to skip non existent source files
    true, // allow to overwrite target files
    ExistingTargetStrategy.OVERWRITE, StoreFileType.values());
    // move the files with the page cache.
    try {
        Iterable<FileHandle> fileHandles = pageCache.streamFilesRecursive(migrationDir)::iterator;
        for (FileHandle fh : fileHandles) {
            Predicate<StoreFile> predicate = storeFile -> storeFile.fileName(StoreFileType.STORE).equals(fh.getFile().getName());
            if (StreamSupport.stream(StoreFile.currentStoreFiles().spliterator(), false).anyMatch(predicate)) {
                final Optional<PagedFile> optionalPagedFile = pageCache.getExistingMapping(fh.getFile());
                if (optionalPagedFile.isPresent()) {
                    optionalPagedFile.get().close();
                }
                fh.rename(new File(storeDir, fh.getFile().getName()), StandardCopyOption.REPLACE_EXISTING);
            }
        }
    } catch (NoSuchFileException e) {
    //This means that we had no files only present in the page cache, this is fine.
    }
    RecordFormats oldFormat = selectForVersion(versionToUpgradeFrom);
    RecordFormats newFormat = selectForVersion(versionToUpgradeTo);
    boolean movingAwayFromVersionTrailers = oldFormat.hasCapability(VERSION_TRAILERS) && !newFormat.hasCapability(VERSION_TRAILERS);
    if (movingAwayFromVersionTrailers) {
        StoreFile.removeTrailers(versionToUpgradeFrom, fileSystem, storeDir, pageCache.pageSize());
    }
    File neoStore = new File(storeDir, MetaDataStore.DEFAULT_NAME);
    long logVersion = MetaDataStore.getRecord(pageCache, neoStore, Position.LOG_VERSION);
    long lastCommittedTx = MetaDataStore.getRecord(pageCache, neoStore, Position.LAST_TRANSACTION_ID);
    // update or add upgrade id and time and other necessary neostore records
    updateOrAddNeoStoreFieldsAsPartOfMigration(migrationDir, storeDir, versionToUpgradeTo);
    // delete old logs
    legacyLogs.deleteUnusedLogFiles(storeDir);
    if (movingAwayFromVersionTrailers) {
        // write a check point in the log in order to make recovery work in the newer version
        new StoreMigratorCheckPointer(storeDir, fileSystem).checkPoint(logVersion, lastCommittedTx);
    }
}