Examples with DBOpEnvException org.apache.jena.dboe.DBOpEnvException used on opensource projects

Example 1 with DBOpEnvException

use of org.apache.jena.dboe.DBOpEnvException in project jena by apache.

the class FilenameUtils method scanForDirByPattern.

/**
 * Find the files in this directory that have namebase as a prefix and
 *  are then numbered.
 *  <p>
 *  Returns a sorted list from, low to high index.
 */
public static List<Path> scanForDirByPattern(Path directory, String namebase, String nameSep) {
    Pattern pattern = Pattern.compile(Pattern.quote(namebase) + Pattern.quote(nameSep) + "[\\d]+");
    List<Path> paths = new ArrayList<>();
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(directory, namebase + nameSep + "*")) {
        for (Path entry : stream) {
            if (!pattern.matcher(entry.getFileName().toString()).matches()) {
                throw new DBOpEnvException("Invalid filename for matching: " + entry.getFileName());
            // Alternative: Skip bad trailing parts but more likely there is a naming problem.
            // LOG.warn("Invalid filename for matching: {} skipped", entry.getFileName());
            // continue;
            }
            // Follows symbolic links.
            if (!Files.isDirectory(entry))
                throw new DBOpEnvException("Not a directory: " + entry);
            paths.add(entry);
        }
    } catch (IOException ex) {
        FmtLog.warn(LOG, "Can't inspect directory: (%s, %s)", directory, namebase);
        throw new DBOpEnvException(ex);
    }
    Comparator<Path> comp = (f1, f2) -> {
        int num1 = extractIndex(f1.getFileName().toString(), namebase, nameSep);
        int num2 = extractIndex(f2.getFileName().toString(), namebase, nameSep);
        return Integer.compare(num1, num2);
    };
    paths.sort(comp);
    // indexes.sort(Long::compareTo);
    return paths;
}

Example 2 with DBOpEnvException

use of org.apache.jena.dboe.DBOpEnvException in project jena by apache.

the class IO_DB method scanForDirByPattern.

/**
 * Find the files in this directory that have namebase as a prefix and
 *  are then numbered.
 *  <p>
 *  Returns a sorted list from, low to high index.
 */
public static List<Path> scanForDirByPattern(Path directory, String namebase, String nameSep) {
    Pattern pattern = Pattern.compile(Pattern.quote(namebase) + Pattern.quote(nameSep) + "[\\d]+");
    List<Path> paths = new ArrayList<>();
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(directory, namebase + "*")) {
        for (Path entry : stream) {
            if (!pattern.matcher(entry.getFileName().toString()).matches()) {
                throw new DBOpEnvException("Invalid filename for matching: " + entry.getFileName());
            // Alternative: Skip bad trailing parts but more likely there is a naming problem.
            // LOG.warn("Invalid filename for matching: {} skipped", entry.getFileName());
            // continue;
            }
            // Follows symbolic links.
            if (!Files.isDirectory(entry))
                throw new DBOpEnvException("Not a directory: " + entry);
            paths.add(entry);
        }
    } catch (IOException ex) {
        FmtLog.warn(IO_DB.class, "Can't inspect directory: (%s, %s)", directory, namebase);
        throw new DBOpEnvException(ex);
    }
    Comparator<Path> comp = (f1, f2) -> {
        int num1 = extractIndex(f1.getFileName().toString(), namebase, nameSep);
        int num2 = extractIndex(f2.getFileName().toString(), namebase, nameSep);
        return Integer.compare(num1, num2);
    };
    paths.sort(comp);
    // indexes.sort(Long::compareTo);
    return paths;
}

Example 3 with DBOpEnvException

use of org.apache.jena.dboe.DBOpEnvException in project jena by apache.

the class ProcessFileLock method lockOperation.

/**
 * Take the lock.
 * <p>
 * Write our PID into the file and return true if it succeeds.
 * <p>
 * Try to get the existing PID if it fails.
 */
private boolean lockOperation(NoLockAction action) {
    synchronized (sync) {
        if (fileLock != null)
            throw new AlreadyLocked("Failed to get a lock: file='" + filepath + "': Lock already held");
        try {
            fileLock = (action != NoLockAction.WAIT) ? fileChannel.tryLock() : fileChannel.lock();
            if (fileLock == null) {
                switch(action) {
                    case EXCEPTION:
                        {
                            // Read without the lock.
                            // This isn't perfect (synchronization issues across multiple processes)
                            // but it is only providing helpful information.
                            int pid = readProcessId(-99);
                            if (pid >= 0)
                                throw new DBOpEnvException("Failed to get a lock: file='" + filepath + "': held by process " + pid);
                            throw new DBOpEnvException("Failed to get a lock: file='" + filepath + "': failed to get the holder's process id");
                        }
                    case RETURN:
                        return false;
                    case WAIT:
                        throw new InternalError("FileChannel.lock returned null");
                }
            }
            // Got the lock. Record our process id.
            int pid = ProcessUtils.getPid(-1);
            writeProcessId(pid);
            return true;
        } catch (IOException ex) {
            if (action == NoLockAction.RETURN)
                return false;
            throw new DBOpEnvException("Failed to get a lock: file='" + filepath + "'", ex);
        }
    }
}

Example 4 with DBOpEnvException

use of org.apache.jena.dboe.DBOpEnvException in project jena by apache.

the class BPlusTreeFactory method createEmptyBPT.

/**
 * Allocate root node space. The root is a Node with a Records block.
 * @param stateMgr
 */
private static int createEmptyBPT(BPTStateMgr stateMgr, BPTreeNodeMgr nodeManager, BPTreeRecordsMgr recordsMgr) {
    // Create an empty records block.
    nodeManager.startUpdate();
    recordsMgr.startUpdate();
    // Empty tree.
    stateMgr.setState(0, 0, 0);
    try {
        BPTreeRecords recordsPage = recordsMgr.create();
        if (recordsPage.getId() != BPlusTreeParams.RootId)
            throw new DBOpEnvException("Root blocks must be at position zero (got " + recordsPage.getId() + ")");
        // Empty data block.
        recordsMgr.write(recordsPage);
        recordsMgr.release(recordsPage);
        // Not this - we haven't full initialized and the BPTreeRecords has null BPTreeRecordsMgr
        // recordsPage.write();
        // recordsPage.release();
        BPTreeNode n = nodeManager.createNode(BPlusTreeParams.RootParent);
        // n.ptrs is currently invalid.  count was 0 so thinks it has a pointer.
        // Force to right layout.
        // No pointers
        n.ptrs.setSize(0);
        // Add the page below
        n.ptrs.add(recordsPage.getId());
        // n.ptrs.set(0, page.getId()); // This is the same as the size is one.
        n.setIsLeaf(true);
        // Count is count of records.
        n.setCount(0);
        int rootId = n.getId();
        nodeManager.write(n);
        nodeManager.release(n);
        // This makes the next blocks alocated 1 and 1 - just like a transaction.
        // Blocks 0/0 are always an empty tree unless the bulk loader built the tree.
        stateMgr.setState(0, 1, 1);
        return rootId;
    } finally {
        recordsMgr.finishUpdate();
        nodeManager.finishUpdate();
    }
// stateMgr.setState(0, 1, 1);
}

Example 5 with DBOpEnvException

use of org.apache.jena.dboe.DBOpEnvException in project jena by apache.

the class BPlusTreeParams method readMeta.

public static BPlusTreeParams readMeta(MetaFile mf) {
    try {
        int pOrder = mf.getPropertyAsInteger(ParamOrder);
        int pKeyLen = mf.getPropertyAsInteger(ParamKeyLength);
        int pRecLen = mf.getPropertyAsInteger(ParamValueLength);
        return new BPlusTreeParams(pOrder, pKeyLen, pRecLen);
    } catch (NumberFormatException ex) {
        Log.error(BPlusTreeParams.class, "Badly formed metadata for B+Tree");
        throw new DBOpEnvException("Failed to read metadata");
    }
}