Package org.iq80.leveldb.util

Examples of org.iq80.leveldb.util.Slice

268
269
270
271
272
273
274
275
276
277
        closed = true;
    }

    public static int crc32c(Slice data, CompressionType type)
    {
        PureJavaCrc32C crc32c = new PureJavaCrc32C();
        crc32c.update(data.getRawArray(), data.getRawOffset(), data.length());
        crc32c.update(type.persistentId() & 0xFF);
        return crc32c.getMaskedValue();
    }
View Full Code Here
33
34
35
36
37
38
39
        return comparator.name();
    }

    @Override
    public Slice findShortestSeparator(Slice start, Slice limit) {
        return new Slice(comparator.findShortestSeparator(start.getBytes(), limit.getBytes()));
    }
View Full Code Here
38
39
40
41
42
43
44
        return new Slice(comparator.findShortestSeparator(start.getBytes(), limit.getBytes()));
    }

    @Override
    public Slice findShortSuccessor(Slice key) {
        return new Slice(comparator.findShortSuccessor(key.getBytes()));
    }
View Full Code Here
129
130
131
132
133
134
135
136
137
138
139
140
141
        // If we just wrote a block, we can now add the handle to index block
        if (pendingIndexEntry) {
            Preconditions.checkState(dataBlockBuilder.isEmpty(), "Internal error: Table has a pending index entry but data block builder is empty");

            Slice shortestSeparator = userComparator.findShortestSeparator(lastKey, key);

            Slice handleEncoding = BlockHandle.writeBlockHandle(pendingHandle);
            indexBlockBuilder.add(shortestSeparator, handleEncoding);
            pendingIndexEntry = false;
        }

        lastKey = key;
View Full Code Here
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
    private BlockHandle writeBlock(BlockBuilder blockBuilder)
            throws IOException
    {
        // close the block
        Slice raw = blockBuilder.finish();

        // attempt to compress the block
        Slice blockContents = raw;
        CompressionType blockCompressionType = CompressionType.NONE;
        if (compressionType == CompressionType.SNAPPY) {
            ensureCompressedOutputCapacity(maxCompressedLength(raw.length()));
            try {
                int compressedSize = Snappy.compress(raw.getRawArray(), raw.getRawOffset(), raw.length(), compressedOutput.getRawArray(), 0);

                // Don't use the compressed data if compressed less than 12.5%,
                if (compressedSize < raw.length() - (raw.length() / 8)) {
                    blockContents = compressedOutput.slice(0, compressedSize);
                    blockCompressionType = CompressionType.SNAPPY;
                }
            }
            catch (IOException ignored) {
                // compression failed, so just store uncompressed form
            }
        }

        // create block trailer
        BlockTrailer blockTrailer = new BlockTrailer(blockCompressionType, crc32c(blockContents, blockCompressionType));
        Slice trailer = BlockTrailer.writeBlockTrailer(blockTrailer);

        // create a handle to this block
        BlockHandle blockHandle = new BlockHandle(position, blockContents.length());

        // write data and trailer
        position += fileChannel.write(new ByteBuffer[]{blockContents.toByteBuffer(), trailer.toByteBuffer()});

        // clean up state
        blockBuilder.reset();

        return blockHandle;
View Full Code Here
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
        // TODO(postrelease): Add stats and other meta blocks
        BlockHandle metaindexBlockHandle = writeBlock(metaIndexBlockBuilder);

        // add last handle to index block
        if (pendingIndexEntry) {
            Slice shortSuccessor = userComparator.findShortSuccessor(lastKey);

            Slice handleEncoding = BlockHandle.writeBlockHandle(pendingHandle);
            indexBlockBuilder.add(shortSuccessor, handleEncoding);
            pendingIndexEntry = false;
        }

        // write index block
        BlockHandle indexBlockHandle = writeBlock(indexBlockBuilder);

        // write footer
        Footer footer = new Footer(metaindexBlockHandle, indexBlockHandle);
        Slice footerEncoding = Footer.writeFooter(footer);
        position += fileChannel.write(footerEncoding.toByteBuffer());
    }
View Full Code Here
103
104
105
106
107
108
109
110
111
112
        return new BlockHandle(offset, (int) size);
    }

    public static Slice writeBlockHandle(BlockHandle blockHandle)
    {
        Slice slice = Slices.allocate(MAX_ENCODED_LENGTH);
        SliceOutput sliceOutput = slice.output();
        writeBlockHandleTo(blockHandle, sliceOutput);
        return slice.slice();
    }
View Full Code Here
45
46
47
48
49
50
51
52
53
54
55
56
        if (sharedBytes < Math.min(start.length(), limit.length())) {
            // if we can add one to the last shared byte without overflow and the two keys differ by more than
            // one increment at this location.
            int lastSharedByte = start.getUnsignedByte(sharedBytes);
            if (lastSharedByte < 0xff && lastSharedByte + 1 < limit.getUnsignedByte(sharedBytes)) {
                Slice result = start.copySlice(0, sharedBytes + 1);
                result.setByte(sharedBytes, lastSharedByte + 1);

                assert (compare(result, limit) < 0) : "start must be less than last limit";
                return result;
            }
        }
View Full Code Here
62
63
64
65
66
67
68
69
70
71
72
73
    {
        // Find first character that can be incremented
        for (int i = 0; i < key.length(); i++) {
            int b = key.getUnsignedByte(i);
            if (b != 0xff) {
                Slice result = key.copySlice(0, i + 1);
                result.setByte(i, b +1);
                return result;
            }
        }
        // key is a run of 0xffs.  Leave it alone.
        return key;
View Full Code Here
71
72
73
74
75
76
77
78
79
        return new Footer(metaindexBlockHandle, indexBlockHandle);
    }

    public static Slice writeFooter(Footer Footer)
    {
        Slice slice = Slices.allocate(ENCODED_LENGTH);
        writeFooter(Footer, slice.output());
        return slice;
    }
View Full Code Here
TOP

Related Classes of org.iq80.leveldb.util.Slice

  • co.cask.cdap.data2.dataset2.lib.table.leveldb.LevelDBOrderedTableCore
  • co.cask.cdap.data2.dataset2.lib.table.leveldb.LevelDBOrderedTableService
  • com.alexkasko.springjdbc.compress.SnappyCompressor
  • com.cloudhopper.datastore.leveldb.LevelDbDataStore
  • com.fasterxml.storemate.backend.leveldb.LevelDBBuilder
  • com.google.common.util.concurrent.ThreadFactoryBuilder
  • com.nabalive.server.web.DataUtil
  • com.nabalive.server.web.TokenUtil
  • com.saasovation.common.port.adapter.persistence.eventsourcing.leveldb.LevelDBJournal
  • com.saasovation.common.port.adapter.persistence.eventsourcing.leveldb.LevelDBJournalRepairTool
    • Copyright © 2018 www.massapicom. All rights reserved.
    All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.