Package org.iq80.leveldb

Examples of org.iq80.leveldb.Options

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        File nodeStateDir = _concatAndCreate(metadataRoot, path + "/" + secondaryId);

        _verifyDir(metadataRoot, true);

        Iq80DBFactory factory = Iq80DBFactory.factory;
        Options options = new Options();
        options = options
                .createIfMissing(true)
                .logger(_ldbLogger)
                // better safe than sorry, for store data?
                .verifyChecksums(true)
                .cacheSize(NODE_STATE_CACHE_SIZE)
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        _verifyDir(lastModDir, canCreate);
       
        StorableConverter storableConv = _storeConfig.createStorableConverter();

        Iq80DBFactory factory = Iq80DBFactory.factory;
        Options options = new Options();
        options = options
                .createIfMissing(canCreate)
                .logger(_ldbLogger)
                .verifyChecksums(false)
                ;
       
        DB dataDB;
        try {
            options = options.cacheSize(_levelDBConfig.dataCacheSize.getNumberOfBytes());
            dataDB = factory.open(dataDir, options);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to open main data LevelDB: "+e.getMessage(), e);
        }
        DB indexDB;
        try {
            options = options.cacheSize(_levelDBConfig.dataCacheSize.getNumberOfBytes());
            indexDB = factory.open(lastModDir, options);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to open last-mod index LevelDB: "+e.getMessage(), e);
        }
        return new LevelDBStoreBackend(storableConv, dbRoot, dataDB, indexDB);
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    @Test
    public void testCompactionsOnBigDataSet()
            throws Exception
    {
        Options options = new Options();
        options.createIfMissing(true);
        DbImpl db = new DbImpl(options, databaseDir);
        for (int index = 0; index < 5000000; index++) {
            String key = "Key LOOOOOOOOOOOOOOOOOONG KEY " + index;
            String value = "This is element " + index + "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABZASDFASDKLFJASDFKJSDFLKSDJFLKJSDHFLKJHSDJFSDFHJASDFLKJSDF";
            db.put(key.getBytes("UTF-8"), value.getBytes("UTF-8"));
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    @Test
    public void testEmpty()
            throws Exception
    {
        Options options = new Options();
        File databaseDir = this.databaseDir;
        DbStringWrapper db = new DbStringWrapper(options, databaseDir);
        assertNull(db.get("foo"));
    }
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    @Test
    public void testEmptyBatch()
            throws Exception
    {
        // open new db
        Options options = new Options().createIfMissing(true);
        DB db = new Iq80DBFactory().open(databaseDir, options);

        // write an empty batch
        WriteBatch batch = db.createWriteBatch();
        batch.close();
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    @Test
    public void testReadWrite()
            throws Exception
    {
        DbStringWrapper db = new DbStringWrapper(new Options(), databaseDir);
        db.put("foo", "v1");
        assertEquals(db.get("foo"), "v1");
        db.put("bar", "v2");
        db.put("foo", "v3");
        assertEquals(db.get("foo"), "v3");
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    @Test
    public void testPutDeleteGet()
            throws Exception
    {
        DbStringWrapper db = new DbStringWrapper(new Options(), databaseDir);
        db.put("foo", "v1");
        assertEquals(db.get("foo"), "v1");
        db.put("foo", "v2");
        assertEquals(db.get("foo"), "v2");
        db.delete("foo");
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    @Test
    public void testGetFromImmutableLayer()
            throws Exception
    {
        // create db with small write buffer
        DbStringWrapper db = new DbStringWrapper(new Options().writeBufferSize(100000), databaseDir);
        db.put("foo", "v1");
        assertEquals(db.get("foo"), "v1");

        // todo Block sync calls
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    @Test
    public void testGetFromVersions()
            throws Exception
    {
        DbStringWrapper db = new DbStringWrapper(new Options(), databaseDir);
        db.put("foo", "v1");
        db.compactMemTable();
        assertEquals(db.get("foo"), "v1");
    }
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    private void tableTest(int blockSize, int blockRestartInterval, List<BlockEntry> entries)
            throws IOException
    {
        reopenFile();
        Options options = new Options().blockSize(blockSize).blockRestartInterval(blockRestartInterval);
        TableBuilder builder = new TableBuilder(options, fileChannel, new BytewiseComparator());

        for (BlockEntry entry : entries) {
            builder.add(entry);
        }
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