Package org.iq80.leveldb

Examples of org.iq80.leveldb.WriteOptions

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        Options options = new Options().createIfMissing(true);

        File path = getTestDirectory(getClass().getName() + "_" + NEXT_ID.incrementAndGet());
        DB db = firstFactory.open(path, options);

        WriteOptions wo = new WriteOptions().sync(false);
        ReadOptions ro = new ReadOptions().fillCache(true).verifyChecksums(true);
        db.put(bytes("Tampa"), bytes("green"));
        db.put(bytes("London"), bytes("red"));
        db.put(bytes("New York"), bytes("blue"));
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    @Override
    public void put(byte[] key, byte[] value)
            throws DBException
    {
        put(key, value, new WriteOptions());
    }
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    @Override
    public void delete(byte[] key)
            throws DBException
    {
        writeInternal(new WriteBatchImpl().delete(key), new WriteOptions());
    }
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    @Override
    public void write(WriteBatch updates)
            throws DBException
    {
        writeInternal((WriteBatchImpl) updates, new WriteOptions());
    }
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            start();

            boolean known = true;

            if (benchmark.equals("fillseq")) {
                write(new WriteOptions(), SEQUENTIAL, FRESH, num, valueSize, 1);
            }
            else if (benchmark.equals("fillbatch")) {
                write(new WriteOptions(), SEQUENTIAL, FRESH, num, valueSize, 1000);
            }
            else if (benchmark.equals("fillrandom")) {
                write(new WriteOptions(), RANDOM, FRESH, num, valueSize, 1);
            }
            else if (benchmark.equals("overwrite")) {
                write(new WriteOptions(), RANDOM, EXISTING, num, valueSize, 1);
            }
            else if (benchmark.equals("fillsync")) {
                write(new WriteOptions().sync(true), RANDOM, FRESH, num / 1000, valueSize, 1);
            }
            else if (benchmark.equals("fill100K")) {
                write(new WriteOptions(), RANDOM, FRESH, num / 1000, 100 * 1000, 1);
            }
            else if (benchmark.equals("readseq")) {
                readSequential();
            }
            else if (benchmark.equals("readreverse")) {
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            long previousLogNumber = versions.getPrevLogNumber();
            List<File> filenames = Filename.listFiles(databaseDir);

            List<Long> logs = Lists.newArrayList();
            for (File filename : filenames) {
                FileInfo fileInfo = Filename.parseFileName(filename);

                if (fileInfo != null &&
                        fileInfo.getFileType() == FileType.LOG &&
                        ((fileInfo.getFileNumber() >= minLogNumber) || (fileInfo.getFileNumber() == previousLogNumber))) {
                    logs.add(fileInfo.getFileNumber());
                }
            }

            // Recover in the order in which the logs were generated
            VersionEdit edit = new VersionEdit();
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        for (FileMetaData fileMetaData : versions.getLiveFiles()) {
            live.add(fileMetaData.getNumber());
        }

        for (File file : Filename.listFiles(databaseDir)) {
            FileInfo fileInfo = Filename.parseFileName(file);
            if (fileInfo == null)
              continue;
            long number = fileInfo.getFileNumber();
            boolean keep = true;
            switch (fileInfo.getFileType()) {
                case LOG:
                    keep = ((number >= versions.getLogNumber()) ||
                            (number == versions.getPrevLogNumber()));
                    break;
                case DESCRIPTOR:
                    // Keep my manifest file, and any newer incarnations'
                    // (in case there is a race that allows other incarnations)
                    keep = (number >= versions.getManifestFileNumber());
                    break;
                case TABLE:
                    keep = live.contains(number);
                    break;
                case TEMP:
                    // Any temp files that are currently being written to must
                    // be recorded in pending_outputs_, which is inserted into "live"
                    keep = live.contains(number);
                    break;
                case CURRENT:
                case DB_LOCK:
                case INFO_LOG:
                    keep = true;
                    break;
            }

            if (!keep) {
                if (fileInfo.getFileType() == FileType.TABLE) {
                    tableCache.evict(number);
                }
                // todo info logging system needed
//                Log(options_.info_log, "Delete type=%d #%lld\n",
//                int(type),
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    DbIterator internalIterator()
    {
        mutex.lock();
        try {
            // merge together the memTable, immutableMemTable, and tables in version set
            MemTableIterator iterator = null;
            if (immutableMemTable != null) {
                iterator = immutableMemTable.iterator();
            }
            Version current = versions.getCurrent();
            return new DbIterator(memTable.iterator(), iterator, current.getLevel0Files(), current.getLevelIterators(), internalKeyComparator);
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    {
        Slice record = Slices.allocate(SIZE_OF_LONG + SIZE_OF_INT + updates.getApproximateSize());
        final SliceOutput sliceOutput = record.output();
        sliceOutput.writeLong(sequenceBegin);
        sliceOutput.writeInt(updates.size());
        updates.forEach(new Handler()
        {
            @Override
            public void put(Slice key, Slice value)
            {
                sliceOutput.writeByte(VALUE.getPersistentId());
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    }

    private BlockIterator getNextBlock()
    {
        Slice blockHandle = blockIterator.next().getValue();
        Block dataBlock = table.openBlock(blockHandle);
        return dataBlock.iterator();
    }
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