Examples with NoSuchFileException java.nio.file.NoSuchFileException used on opensource projects

Example 16 with NoSuchFileException

use of java.nio.file.NoSuchFileException in project neo4j by neo4j.

the class CommonAbstractStore method checkAndLoadStorage.

/**
     * This method is called by constructors. Checks the header record and loads the store.
     * <p>
     * Note: This method will map the file with the page cache. The store file must not
     * be accessed directly until it has been unmapped - the store file must only be
     * accessed through the page cache.
     * @param createIfNotExists If true, creates and initialises the store file if it does not exist already. If false,
     * this method will instead throw an exception in that situation.
     */
protected void checkAndLoadStorage(boolean createIfNotExists) {
    int pageSize = pageCache.pageSize();
    int filePageSize;
    try (PagedFile pagedFile = pageCache.map(storageFileName, pageSize, ANY_PAGE_SIZE)) {
        extractHeaderRecord(pagedFile);
        filePageSize = pageCache.pageSize() - pageCache.pageSize() % getRecordSize();
    } catch (NoSuchFileException | StoreNotFoundException e) {
        if (createIfNotExists) {
            try {
                createStore(pageSize);
                return;
            } catch (IOException e1) {
                e.addSuppressed(e1);
            }
        }
        if (e instanceof StoreNotFoundException) {
            throw (StoreNotFoundException) e;
        }
        throw new StoreNotFoundException("Store file not found: " + storageFileName, e);
    } catch (IOException e) {
        throw new UnderlyingStorageException("Unable to open store file: " + storageFileName, e);
    }
    loadStorage(filePageSize);
}

Example 17 with NoSuchFileException

use of java.nio.file.NoSuchFileException in project neo4j by neo4j.

the class NeoStores method verifyRecordFormat.

private void verifyRecordFormat() {
    try {
        String expectedStoreVersion = recordFormats.storeVersion();
        long record = getRecord(pageCache, neoStoreFileName, STORE_VERSION);
        if (record != MetaDataRecordFormat.FIELD_NOT_PRESENT) {
            String actualStoreVersion = versionLongToString(record);
            RecordFormats actualStoreFormat = RecordFormatSelector.selectForVersion(actualStoreVersion);
            if (!isCompatibleFormats(actualStoreFormat)) {
                throw new UnexpectedStoreVersionException(actualStoreVersion, expectedStoreVersion);
            }
        }
    } catch (NoSuchFileException e) {
    // Occurs when there is no file, which is obviously when creating a store.
    // Caught as an exception because we want to leave as much interaction with files as possible
    // to the page cache.
    } catch (IOException e) {
        throw new UnderlyingStorageException(e);
    }
}

Example 18 with NoSuchFileException

use of java.nio.file.NoSuchFileException in project neo4j by neo4j.

the class EphemeralFileSystemAbstraction method renameFile.

@Override
public void renameFile(File from, File to, CopyOption... copyOptions) throws IOException {
    from = canonicalFile(from);
    to = canonicalFile(to);
    if (!files.containsKey(from)) {
        throw new NoSuchFileException("'" + from + "' doesn't exist");
    }
    boolean replaceExisting = false;
    for (CopyOption copyOption : copyOptions) {
        replaceExisting |= copyOption == REPLACE_EXISTING;
    }
    if (files.containsKey(to) && !replaceExisting) {
        throw new FileAlreadyExistsException("'" + to + "' already exists");
    }
    if (!isDirectory(to.getParentFile())) {
        throw new NoSuchFileException("Target directory[" + to.getParent() + "] does not exists");
    }
    files.put(to, files.remove(from));
}

Example 19 with NoSuchFileException

use of java.nio.file.NoSuchFileException 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);
    }
}

Example 20 with NoSuchFileException

use of java.nio.file.NoSuchFileException in project jdk8u_jdk by JetBrains.

the class BlockDeviceSize method main.

public static void main(String[] args) throws Throwable {
    try (FileChannel ch = FileChannel.open(BLK_PATH, READ);
        RandomAccessFile file = new RandomAccessFile(BLK_FNAME, "r")) {
        long size1 = ch.size();
        long size2 = file.length();
        if (size1 != size2) {
            throw new RuntimeException("size differs when retrieved" + " in different ways: " + size1 + " != " + size2);
        }
        System.out.println("OK");
    } catch (NoSuchFileException nsfe) {
        System.err.println("File " + BLK_FNAME + " not found." + " Skipping test");
    } catch (AccessDeniedException ade) {
        System.err.println("Access to " + BLK_FNAME + " is denied." + " Run test as root.");
    }
}