Examples of MerkleTree

org.apache.cassandra.utils.MerkleTree
A MerkleTree implemented as a binary tree. A MerkleTree is a full binary tree that represents a perfect binary tree of depth 'hashdepth'. In a perfect binary tree, each leaf contains a sequentially hashed range, and each inner node contains the binary hash of its two children. In the MerkleTree, many ranges will not be split to the full depth of the perfect binary tree: the leaves of this tree are Leaf objects, which contain the computed values of the nodes that would be below them if the tree were perfect. The hash values of the inner nodes of the MerkleTree are calculated lazily based on their children when the hash of a range is requested with hash(range). Inputs passed to TreeRange.validate should be calculated using a very secure hash, because all hashing internal to the tree is accomplished using XOR. If two MerkleTrees have the same hashdepth, they represent a perfect tree of the same depth, and can always be compared, regardless of size or splits.

Examples of org.apache.cassandra.utils.MerkleTree

        Validator validator = new Validator(new CFPair(tablename, cfname));
        validator.prepare();
        validator.complete();


        // grab reference to the tree
        MerkleTree tree = validator.tree;


        // notify ourself (should immediately be delivered into AE_STAGE)
        aes.notifyNeighbors(validator, LOCAL, Arrays.asList(LOCAL));
        flushAES().get(5, TimeUnit.SECONDS);

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Examples of org.apache.cassandra.utils.MerkleTree

        Validator validator = new Validator(new CFPair("Keyspace1", "lcf"));
        validator.prepare();


        // create a clone with no values filled
        validator.complete();
        MerkleTree ltree = validator.tree;
        validator = new Validator(new CFPair("Keyspace1", "rcf"));
        validator.prepare();
        validator.complete();
        MerkleTree rtree = validator.tree;


        // change a range in one of the trees
        Token min = StorageService.instance.getPartitioner().getMinimumToken();
        ltree.invalidate(min);
        MerkleTree.TreeRange changed = ltree.invalids(new Range(min, min)).next();

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Examples of org.apache.cassandra.utils.MerkleTree


        // generate a tree
        Validator validator = new Validator(request);
        validator.prepare(store);
        validator.completeTree();
        MerkleTree ltree = validator.tree;


        // and a clone
        validator = new Validator(request);
        validator.prepare(store);
        validator.completeTree();
        MerkleTree rtree = validator.tree;


        // change a range in one of the trees
        Token ltoken = StorageService.getPartitioner().midpoint(local_range.left, local_range.right);
        ltree.invalidate(ltoken);
        MerkleTree.TreeRange changed = ltree.get(ltoken);

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Examples of org.apache.cassandra.utils.MerkleTree

        
        // generate a tree
        Validator validator = new Validator(request);
        validator.prepare(store);
        validator.completeTree();
        MerkleTree ltree = validator.tree;


        // and a clone
        validator = new Validator(request);
        validator.prepare(store);
        validator.completeTree();
        MerkleTree rtree = validator.tree;


        // change a range in one of the trees
        Token ltoken = StorageService.getPartitioner().midpoint(local_range.left, local_range.right);
        ltree.invalidate(ltoken);
        MerkleTree.TreeRange changed = ltree.get(ltoken);

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Examples of org.apache.cassandra.utils.MerkleTree

    {
        // generate a tree
        Validator validator = new Validator(request);
        validator.prepare(store);
        validator.complete();
        MerkleTree ltree = validator.tree;


        // and a clone
        validator = new Validator(request);
        validator.prepare(store);
        validator.complete();
        MerkleTree rtree = validator.tree;


        // change a range we own in one of the trees
        Token ltoken = StorageService.instance.getLocalToken();
        ltree.invalidate(ltoken);
        MerkleTree.TreeRange changed = ltree.invalids(StorageService.instance.getLocalPrimaryRange()).next();

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Examples of org.apache.cassandra.utils.MerkleTree

    
    private void testTreeResponseWrite() throws IOException
    {
        AntiEntropyService.Validator v0 = new AntiEntropyService.Validator(Statics.req);
        IPartitioner part = new RandomPartitioner();
        MerkleTree mt = new MerkleTree(part, MerkleTree.RECOMMENDED_DEPTH, Integer.MAX_VALUE);
        List<Token> tokens = new ArrayList<Token>();
        for (int i = 0; i < 10; i++)
        {
            Token t = part.getRandomToken();
            tokens.add(t);
            mt.split(t);
        }
        AntiEntropyService.Validator v1 = new AntiEntropyService.Validator(Statics.req, mt);
        DataOutputStream out = getOutput("service.TreeResponse.bin");
        AntiEntropyService.TreeResponseVerbHandler.SERIALIZER.serialize(v0, out);
        AntiEntropyService.TreeResponseVerbHandler.SERIALIZER.serialize(v1, out);

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Examples of org.apache.cassandra.utils.MerkleTree

    {
        // generate a tree
        Validator validator = new Validator(request);
        validator.prepare(store);
        validator.complete();
        MerkleTree ltree = validator.tree;


        // and a clone
        validator = new Validator(request);
        validator.prepare(store);
        validator.complete();
        MerkleTree rtree = validator.tree;


        // change a range we own in one of the trees
        Token ltoken = StorageService.instance.getLocalToken();
        ltree.invalidate(ltoken);
        MerkleTree.TreeRange changed = ltree.invalids(StorageService.instance.getLocalPrimaryRange()).next();

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Examples of org.apache.cassandra.utils.MerkleTree

        Validator validator = new Validator(new CFPair(tablename, cfname));
        validator.prepare(store);
        validator.complete();


        // grab reference to the tree
        MerkleTree tree = validator.tree;


        // notify ourself (should immediately be delivered into AE_STAGE)
        aes.notifyNeighbors(validator, LOCAL, Arrays.asList(LOCAL));
        flushAES().get(5, TimeUnit.SECONDS);

View Full Code Here

Examples of org.apache.cassandra.utils.MerkleTree

    {
        // generate a tree
        Validator validator = new Validator(new CFPair(tablename, cfname));
        validator.prepare(store);
        validator.complete();
        MerkleTree ltree = validator.tree;


        // and a clone
        validator = new Validator(new CFPair(tablename, cfname));
        validator.prepare(store);
        validator.complete();
        MerkleTree rtree = validator.tree;


        // change a range in one of the trees
        Token min = StorageService.instance.getPartitioner().getMinimumToken();
        ltree.invalidate(min);
        MerkleTree.TreeRange changed = ltree.invalids(new Range(min, min)).next();

View Full Code Here

Examples of org.apache.cassandra.utils.MerkleTree

        
        // generate a tree
        Validator validator = new Validator(request);
        validator.prepare(store);
        validator.complete();
        MerkleTree ltree = validator.tree;


        // and a clone
        validator = new Validator(request);
        validator.prepare(store);
        validator.complete();
        MerkleTree rtree = validator.tree;


        // change a range in one of the trees
        Token ltoken = StorageService.getPartitioner().midpoint(local_range.left, local_range.right);
        ltree.invalidate(ltoken);
        MerkleTree.TreeRange changed = ltree.get(ltoken);

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