Examples with Store org.h2.mvstore.db.MVTableEngine.Store used on opensource projects

Example 1 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project jackrabbit-oak by apache.

the class BlobCache method addGeneration.

@Override
public void addGeneration(int generation, boolean readOnly) {
    CacheMap<Long, byte[]> d = cache.openMap(generation, "data", new MVMap.Builder<Long, byte[]>());
    data.addReadMap(generation, d);
    CacheMap<String, byte[]> m = cache.openMap(generation, "meta", new MVMap.Builder<String, byte[]>());
    meta.addReadMap(generation, m);
    if (!readOnly) {
        // the order is important:
        // if we switch the data first,
        // we could end up with the data in store 1
        // but the metadata in store 2 - which could
        // result in a data block not found if store 1
        // is removed later on
        meta.setWriteMap(m);
        data.setWriteMap(d);
    }
    if (streamStore == null) {
        streamStore = new StreamStore(data);
    }
}

Example 2 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project h2database by h2database.

the class ScriptBase method openInput.

/**
 * Open the input stream.
 */
void openInput() {
    String file = getFileName();
    if (file == null) {
        return;
    }
    if (isEncrypted()) {
        initStore();
        in = new FileStoreInputStream(store, this, compressionAlgorithm != null, false);
    } else {
        InputStream inStream;
        try {
            inStream = FileUtils.newInputStream(file);
        } catch (IOException e) {
            throw DbException.convertIOException(e, file);
        }
        in = new BufferedInputStream(inStream, Constants.IO_BUFFER_SIZE);
        in = CompressTool.wrapInputStream(in, compressionAlgorithm, SCRIPT_SQL);
        if (in == null) {
            throw DbException.get(ErrorCode.FILE_NOT_FOUND_1, SCRIPT_SQL + " in " + file);
        }
    }
}

Example 3 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project h2database by h2database.

the class BackupCommand method backupTo.

private void backupTo(String fileName) {
    Database db = session.getDatabase();
    if (!db.isPersistent()) {
        throw DbException.get(ErrorCode.DATABASE_IS_NOT_PERSISTENT);
    }
    try {
        Store mvStore = db.getMvStore();
        if (mvStore != null) {
            mvStore.flush();
        }
        String name = db.getName();
        name = FileUtils.getName(name);
        try (OutputStream zip = FileUtils.newOutputStream(fileName, false)) {
            ZipOutputStream out = new ZipOutputStream(zip);
            db.flush();
            if (db.getPageStore() != null) {
                String fn = db.getName() + Constants.SUFFIX_PAGE_FILE;
                backupPageStore(out, fn, db.getPageStore());
            }
            // synchronize on the database, to avoid concurrent temp file
            // creation / deletion / backup
            String base = FileUtils.getParent(db.getName());
            synchronized (db.getLobSyncObject()) {
                String prefix = db.getDatabasePath();
                String dir = FileUtils.getParent(prefix);
                dir = FileLister.getDir(dir);
                ArrayList<String> fileList = FileLister.getDatabaseFiles(dir, name, true);
                for (String n : fileList) {
                    if (n.endsWith(Constants.SUFFIX_LOB_FILE)) {
                        backupFile(out, base, n);
                    }
                    if (n.endsWith(Constants.SUFFIX_MV_FILE) && mvStore != null) {
                        MVStore s = mvStore.getStore();
                        boolean before = s.getReuseSpace();
                        s.setReuseSpace(false);
                        try {
                            InputStream in = mvStore.getInputStream();
                            backupFile(out, base, n, in);
                        } finally {
                            s.setReuseSpace(before);
                        }
                    }
                }
            }
            out.close();
        }
    } catch (IOException e) {
        throw DbException.convertIOException(e, fileName);
    }
}

Example 4 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project h2database by h2database.

the class BackupCommand method backupPageStore.

private void backupPageStore(ZipOutputStream out, String fileName, PageStore store) throws IOException {
    Database db = session.getDatabase();
    fileName = FileUtils.getName(fileName);
    out.putNextEntry(new ZipEntry(fileName));
    int pos = 0;
    try {
        store.setBackup(true);
        while (true) {
            pos = store.copyDirect(pos, out);
            if (pos < 0) {
                break;
            }
            int max = store.getPageCount();
            db.setProgress(DatabaseEventListener.STATE_BACKUP_FILE, fileName, pos, max);
        }
    } finally {
        store.setBackup(false);
    }
    out.closeEntry();
}

Example 5 with Store

use of org.h2.mvstore.db.MVTableEngine.Store in project h2database by h2database.

the class Explain method query.

@Override
public ResultInterface query(int maxrows) {
    Column column = new Column("PLAN", Value.STRING);
    Database db = session.getDatabase();
    ExpressionColumn expr = new ExpressionColumn(db, column);
    Expression[] expressions = { expr };
    result = new LocalResult(session, expressions, 1);
    if (maxrows >= 0) {
        String plan;
        if (executeCommand) {
            PageStore store = null;
            Store mvStore = null;
            if (db.isPersistent()) {
                store = db.getPageStore();
                if (store != null) {
                    store.statisticsStart();
                }
                mvStore = db.getMvStore();
                if (mvStore != null) {
                    mvStore.statisticsStart();
                }
            }
            if (command.isQuery()) {
                command.query(maxrows);
            } else {
                command.update();
            }
            plan = command.getPlanSQL();
            Map<String, Integer> statistics = null;
            if (store != null) {
                statistics = store.statisticsEnd();
            } else if (mvStore != null) {
                statistics = mvStore.statisticsEnd();
            }
            if (statistics != null) {
                int total = 0;
                for (Entry<String, Integer> e : statistics.entrySet()) {
                    total += e.getValue();
                }
                if (total > 0) {
                    statistics = new TreeMap<>(statistics);
                    StringBuilder buff = new StringBuilder();
                    if (statistics.size() > 1) {
                        buff.append("total: ").append(total).append('\n');
                    }
                    for (Entry<String, Integer> e : statistics.entrySet()) {
                        int value = e.getValue();
                        int percent = (int) (100L * value / total);
                        buff.append(e.getKey()).append(": ").append(value);
                        if (statistics.size() > 1) {
                            buff.append(" (").append(percent).append("%)");
                        }
                        buff.append('\n');
                    }
                    plan += "\n/*\n" + buff.toString() + "*/";
                }
            }
        } else {
            plan = command.getPlanSQL();
        }
        add(plan);
    }
    result.done();
    return result;
}