Examples with TreeRange org.apache.cassandra.utils.MerkleTree.TreeRange used on opensource projects

Example 1 with TreeRange

use of org.apache.cassandra.utils.MerkleTree.TreeRange in project cassandra by apache.

the class MerkleTreeTest method testHashRandom.

@Test
public void testHashRandom() {
    int max = 1000000;
    TOKEN_SCALE = new BigInteger("" + max);
    mt = new MerkleTree(partitioner, fullRange(), RECOMMENDED_DEPTH, 32);
    Random random = new Random();
    while (true) {
        if (!mt.split(tok(random.nextInt(max))))
            break;
    }
    // validate the tree
    TreeRangeIterator ranges = mt.invalids();
    for (TreeRange range : ranges) range.addHash(new RowHash(range.right, new byte[0], 0));
    assert mt.hash(new Range<>(tok(-1), tok(-1))) != null : "Could not hash tree " + mt;
}

Example 2 with TreeRange

use of org.apache.cassandra.utils.MerkleTree.TreeRange in project cassandra by apache.

the class MerkleTreesTest method testHashRandom.

@Test
public void testHashRandom() {
    int max = 1000000;
    TOKEN_SCALE = new BigInteger("" + max);
    mts = new MerkleTrees(partitioner);
    mts.addMerkleTree(32, fullRange());
    Random random = new Random();
    while (true) {
        if (!mts.split(tok(random.nextInt(max))))
            break;
    }
    // validate the tree
    TreeRangeIterator ranges = mts.invalids();
    for (TreeRange range : ranges) range.addHash(new RowHash(range.right, new byte[0], 0));
    assert mts.hash(new Range<>(tok(-1), tok(-1))) != null : "Could not hash tree " + mts;
}

Example 3 with TreeRange

use of org.apache.cassandra.utils.MerkleTree.TreeRange in project cassandra by apache.

the class MerkleTreesTest method testDifference.

@Test
public void testDifference() {
    int maxsize = 16;
    mts = new MerkleTrees(partitioner);
    mts.addMerkleTree(32, fullRange());
    MerkleTrees mts2 = new MerkleTrees(partitioner);
    mts2.addMerkleTree(32, fullRange());
    mts.init();
    mts2.init();
    // add dummy hashes to both trees
    for (TreeRange range : mts.invalids()) range.addAll(new HIterator(range.right));
    for (TreeRange range : mts2.invalids()) range.addAll(new HIterator(range.right));
    TreeRange leftmost = null;
    TreeRange middle = null;
    // give some room for splitting
    mts.maxsize(fullRange(), maxsize + 2);
    // split the leftmost
    Iterator<TreeRange> ranges = mts.invalids();
    leftmost = ranges.next();
    mts.split(leftmost.right);
    // set the hashes for the leaf of the created split
    middle = mts.get(leftmost.right);
    middle.hash("arbitrary!".getBytes());
    mts.get(partitioner.midpoint(leftmost.left, leftmost.right)).hash("even more arbitrary!".getBytes());
    // trees should disagree for (leftmost.left, middle.right]
    List<Range<Token>> diffs = MerkleTrees.difference(mts, mts2);
    assertEquals(diffs + " contains wrong number of differences:", 1, diffs.size());
    assertTrue(diffs.contains(new Range<>(leftmost.left, middle.right)));
}

Example 4 with TreeRange

use of org.apache.cassandra.utils.MerkleTree.TreeRange in project cassandra by apache.

the class MerkleTreesTest method testValidateTree.

/**
     * Generate two trees with different splits, but containing the same keys, and
     * check that they compare equally.
     *
     * The set of keys used in this test is: #{2,4,6,8,12,14,0}
     */
@Test
public void testValidateTree() {
    // this test needs slightly more resolution
    TOKEN_SCALE = new BigInteger("16");
    Range<Token> full = new Range<>(tok(-1), tok(-1));
    Iterator<TreeRange> ranges;
    MerkleTrees mts2 = new MerkleTrees(partitioner);
    mts2.addMerkleTree(Integer.MAX_VALUE, fullRange());
    mts.split(tok(8));
    mts.split(tok(4));
    mts.split(tok(12));
    mts.split(tok(6));
    mts.split(tok(10));
    ranges = mts.invalids();
    // (-1,4]: depth 2
    ranges.next().addAll(new HIterator(2, 4));
    // (4,6]
    ranges.next().addAll(new HIterator(6));
    // (6,8]
    ranges.next().addAll(new HIterator(8));
    // (8,10]
    ranges.next().addAll(new HIterator(/*empty*/
    new int[0]));
    // (10,12]
    ranges.next().addAll(new HIterator(12));
    // (12,-1]: depth 2
    ranges.next().addAll(new HIterator(14, -1));
    mts2.split(tok(8));
    mts2.split(tok(4));
    mts2.split(tok(12));
    mts2.split(tok(2));
    mts2.split(tok(10));
    mts2.split(tok(9));
    mts2.split(tok(11));
    ranges = mts2.invalids();
    // (-1,2]
    ranges.next().addAll(new HIterator(2));
    // (2,4]
    ranges.next().addAll(new HIterator(4));
    // (4,8]: depth 2
    ranges.next().addAll(new HIterator(6, 8));
    // (8,9]
    ranges.next().addAll(new HIterator(/*empty*/
    new int[0]));
    // (9,10]
    ranges.next().addAll(new HIterator(/*empty*/
    new int[0]));
    // (10,11]: depth 4
    ranges.next().addAll(new HIterator(/*empty*/
    new int[0]));
    // (11,12]: depth 4
    ranges.next().addAll(new HIterator(12));
    // (12,-1]: depth 2
    ranges.next().addAll(new HIterator(14, -1));
    byte[] mthash = mts.hash(full);
    byte[] mt2hash = mts2.hash(full);
    assertHashEquals("Tree hashes did not match: " + mts + " && " + mts2, mthash, mt2hash);
}

Example 5 with TreeRange

use of org.apache.cassandra.utils.MerkleTree.TreeRange in project cassandra by apache.

the class MerkleTreesTest method testSerialization.

@Test
public void testSerialization() throws Exception {
    Range<Token> first = new Range<>(tok(3), tok(4));
    Collection<Range<Token>> ranges = new ArrayList<>();
    ranges.add(first);
    ranges.add(new Range<Token>(tok(5), tok(2)));
    mts = new MerkleTrees(partitioner);
    mts.addMerkleTrees(256, ranges);
    // populate and validate the tree
    mts.init();
    for (TreeRange range : mts.invalids()) range.addAll(new HIterator(range.right));
    byte[] initialhash = mts.hash(first);
    long serializedSize = MerkleTrees.serializer.serializedSize(mts, MessagingService.current_version);
    DataOutputBuffer out = new DataOutputBuffer();
    MerkleTrees.serializer.serialize(mts, out, MessagingService.current_version);
    byte[] serialized = out.toByteArray();
    assertEquals(serializedSize, serialized.length);
    DataInputBuffer in = new DataInputBuffer(serialized);
    MerkleTrees restored = MerkleTrees.serializer.deserialize(in, MessagingService.current_version);
    assertHashEquals(initialhash, restored.hash(first));
}