Examples with BytesKeyValue com.jd.blockchain.ledger.merkletree.BytesKeyValue used on opensource projects

Example 1 with BytesKeyValue

use of com.jd.blockchain.ledger.merkletree.BytesKeyValue in project jdchain-core by blockchain-jd-com.

the class MerkleHashSortTreeTest method testHashBucket.

/**
 */
@Test
public void testHashBucket() {
    byte[][] keys = new byte[4][];
    byte[][] values = new byte[4][];
    for (int i = 0; i < keys.length; i++) {
        keys[i] = BytesUtils.toBytes("KEY-" + i);
        values[i] = RandomUtils.generateRandomBytes(16);
    }
    TreeOptions treeOptions = TreeOptions.build().setDefaultHashAlgorithm(ClassicAlgorithm.SHA256.code());
    Bytes bucketPrefix = Bytes.fromString("BUCKET");
    MemoryKVStorage kvStorage = new MemoryKVStorage();
    MerkleHashBucket hashBucket = new MerkleHashBucket(100, keys[0], values[0], TreeDegree.D3, treeOptions, bucketPrefix, kvStorage);
    // 验证初始化之后的数据是否正确；
    assertEquals(1, hashBucket.getKeysCount());
    MerkleValue<byte[]> value = hashBucket.getValue(keys[0]);
    assertNotNull(value);
    assertEquals(0, value.getId());
    assertArrayEquals(values[0], value.getValue());
    assertEquals(0, hashBucket.getVersion(keys[0]));
    MerkleValue<byte[]> value_v1 = hashBucket.getValue(keys[0], 1);
    assertNull(value_v1);
    MerkleValue<byte[]> value1_v1 = hashBucket.getValue(keys[1], 0);
    assertNull(value1_v1);
    // 提交数据；
    hashBucket.commit();
    // 模拟对默尔克哈希桶的存储；
    byte[] bucketBytes = BinaryProtocol.encode(hashBucket, HashBucketEntry.class);
    HashBucketEntry bucketEntry = BinaryProtocol.decode(bucketBytes);
    // 重新加载；
    hashBucket = new MerkleHashBucket(100, bucketEntry.getKeySet(), TreeDegree.D3, treeOptions, bucketPrefix, kvStorage);
    // 验证重新加载之后的数据正确性；
    value = hashBucket.getValue(keys[0]);
    assertNotNull(value);
    assertEquals(0, value.getId());
    assertArrayEquals(values[0], value.getValue());
    assertEquals(0, hashBucket.getVersion(keys[0]));
    assertEquals(1, hashBucket.getKeysCount());
    SkippingIterator<MerkleValue<HashEntry>> keysIterator = hashBucket.iterator();
    assertEquals(1, keysIterator.getTotalCount());
    assertTrue(keysIterator.hasNext());
    MerkleValue<HashEntry> entry = keysIterator.next();
    assertNotNull(entry);
    assertTrue(entry.getValue() instanceof BytesKeyValue);
    BytesKeyValue kv = (BytesKeyValue) entry.getValue();
    assertArrayEquals(keys[0], kv.getKey().toBytes());
    assertArrayEquals(values[0], kv.getValue().toBytes());
    // 验证加入新的键；
    for (int i = 1; i < keys.length; i++) {
        hashBucket.setValue(keys[i], 0, values[i]);
    }
    assertEquals(keys.length, hashBucket.getKeysCount());
    for (int i = 0; i < keys.length; i++) {
        value = hashBucket.getValue(keys[i]);
        assertNotNull(value);
        // id 即版本；
        assertEquals(0, value.getId());
        assertArrayEquals(values[i], value.getValue());
        assertEquals(0, hashBucket.getVersion(keys[i]));
    }
    hashBucket.commit();
    // 重新加载并验证数据；
    bucketBytes = BinaryProtocol.encode(hashBucket, HashBucketEntry.class);
    bucketEntry = BinaryProtocol.decode(bucketBytes);
    hashBucket = new MerkleHashBucket(100, bucketEntry.getKeySet(), TreeDegree.D3, treeOptions, bucketPrefix, kvStorage);
    assertEquals(keys.length, hashBucket.getKeysCount());
    for (int i = 0; i < keys.length; i++) {
        value = hashBucket.getValue(keys[i]);
        assertNotNull(value);
        // id 即版本；
        assertEquals(0, value.getId());
        assertArrayEquals(values[i], value.getValue());
        assertEquals(0, hashBucket.getVersion(keys[i]));
    }
}