Package org.iq80.leveldb.util

Examples of org.iq80.leveldb.util.Slice

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            long approximateOffset = table.getApproximateOffsetOf(entry.getKey());
            assertTrue(approximateOffset >= lastApproximateOffset);
            lastApproximateOffset = approximateOffset;
        }

        Slice endKey = Slices.wrappedBuffer(new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
        seekingIterator.seek(endKey);
        BlockHelper.assertSequence(seekingIterator, Collections.<BlockEntry>emptyList());

        long approximateOffset = table.getApproximateOffsetOf(endKey);
        assertTrue(approximateOffset >= lastApproximateOffset);
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        return key.substring(0, key.length() - 1) + ((char) (lastByte + 1));
    }

    public static Slice before(Entry<Slice, ?> expectedEntry)
    {
        Slice slice = expectedEntry.getKey().copySlice(0, expectedEntry.getKey().length());
        int lastByte = slice.length() - 1;
        slice.setByte(lastByte, slice.getUnsignedByte(lastByte) - 1);
        return slice;
    }
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        return slice;
    }

    public static Slice after(Entry<Slice, ?> expectedEntry)
    {
        Slice slice = expectedEntry.getKey().copySlice(0, expectedEntry.getKey().length());
        int lastByte = slice.length() - 1;
        slice.setByte(lastByte, slice.getUnsignedByte(lastByte) + 1);
        return slice;
    }
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    }

    public static int estimateEntriesSize(int blockRestartInterval, List<BlockEntry> entries)
    {
        int size = 0;
        Slice previousKey = null;
        int restartBlockCount = 0;
        for (BlockEntry entry : entries) {
            int nonSharedBytes;
            if (restartBlockCount < blockRestartInterval) {
                nonSharedBytes = entry.getKey().length() - BlockBuilder.calculateSharedBytes(entry.getKey(), previousKey);
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            seekingIterator.seek(afterString(entry));
            assertSequence(seekingIterator, nextEntries.subList(1, nextEntries.size()));
        }

        Slice endKey = Slices.wrappedBuffer(new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
        seekingIterator.seek(endKey.toString(UTF_8));
        assertSequence(seekingIterator, Collections.<Entry<String, String>>emptyList());
    }
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        // test readRecord
        FileChannel fileChannel = new FileInputStream(writer.getFile()).getChannel();
        try {
            LogReader reader = new LogReader(fileChannel, NO_CORRUPTION_MONITOR, true, 0);
            for (Slice expected : records) {
                Slice actual = reader.readRecord();
                assertEquals(actual, expected);
            }
            assertNull(reader.readRecord());
        }
        finally {
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    }

    static Slice toSlice(String value, int times)
    {
        byte[] bytes = value.getBytes(UTF_8);
        Slice slice = Slices.allocate(bytes.length * times);
        SliceOutput sliceOutput = slice.output();
        for (int i = 0; i < times; i++) {
            sliceOutput.writeBytes(bytes);
        }
        return slice;
    }
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            throws Exception
    {
        File file = File.createTempFile("test", ".log");
        try {
            int recordSize = LogConstants.BLOCK_SIZE - LogConstants.HEADER_SIZE;
            Slice record = new Slice(recordSize);

            LogWriter writer = new MMapLogWriter(file, 10);
            writer.addRecord(record, false);
            writer.close();
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            throws Exception
    {
        File file = File.createTempFile("test", ".log");
        try {
            int recordSize = LogConstants.BLOCK_SIZE - LogConstants.HEADER_SIZE;
            Slice record = new Slice(recordSize);

            LogWriter writer = new FileChannelLogWriter(file, 10);
            writer.addRecord(record, false);
            writer.close();
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        for (BlockEntry entry : entries) {
            builder.add(entry);
        }

        assertEquals(builder.currentSizeEstimate(), BlockHelper.estimateBlockSize(blockRestartInterval, entries));
        Slice blockSlice = builder.finish();
        assertEquals(builder.currentSizeEstimate(), BlockHelper.estimateBlockSize(blockRestartInterval, entries));

        Block block = new Block(blockSlice, new BytewiseComparator());
        assertEquals(block.size(), BlockHelper.estimateBlockSize(blockRestartInterval, entries));
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