Java Range类代码示例

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/**
 * When there is no difference between two, LocalSyncTask should return stats with 0 difference.
 */
@Test
public void testNoDifference() throws Throwable
{
    final InetAddress ep1 = InetAddress.getByName("127.0.0.1");
    final InetAddress ep2 = InetAddress.getByName("127.0.0.1");

    Range<Token> range = new Range<>(partirioner.getMinimumToken(), partirioner.getRandomToken());
    RepairJobDesc desc = new RepairJobDesc(UUID.randomUUID(), UUID.randomUUID(), KEYSPACE1, "Standard1", Arrays.asList(range));

    MerkleTrees tree1 = createInitialTree(desc);

    MerkleTrees tree2 = createInitialTree(desc);

    // difference the trees
    // note: we reuse the same endpoint which is bogus in theory but fine here
    TreeResponse r1 = new TreeResponse(ep1, tree1);
    TreeResponse r2 = new TreeResponse(ep2, tree2);
    LocalSyncTask task = new LocalSyncTask(desc, r1, r2, ActiveRepairService.UNREPAIRED_SSTABLE);
    task.run();

    assertEquals(0, task.get().numberOfDifferences);
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
public StreamRequest deserialize(DataInputPlus in, int version) throws IOException
{
    String keyspace = in.readUTF();
    long repairedAt = in.readLong();
    int rangeCount = in.readInt();
    List<Range<Token>> ranges = new ArrayList<>(rangeCount);
    for (int i = 0; i < rangeCount; i++)
    {
        Token left = Token.serializer.deserialize(in, MessagingService.globalPartitioner(), version);
        Token right = Token.serializer.deserialize(in, MessagingService.globalPartitioner(), version);
        ranges.add(new Range<>(left, right));
    }
    int cfCount = in.readInt();
    List<String> columnFamilies = new ArrayList<>(cfCount);
    for (int i = 0; i < cfCount; i++)
        columnFamilies.add(in.readUTF());
    return new StreamRequest(keyspace, ranges, columnFamilies, repairedAt);
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
public LeveledScanner(Collection<SSTableReader> sstables, Collection<Range<Token>> ranges)
{
    this.ranges = ranges;

    // add only sstables that intersect our range, and estimate how much data that involves
    this.sstables = new ArrayList<>(sstables.size());
    long length = 0;
    for (SSTableReader sstable : sstables)
    {
        this.sstables.add(sstable);
        long estimatedKeys = sstable.estimatedKeys();
        double estKeysInRangeRatio = 1.0;

        if (estimatedKeys > 0 && ranges != null)
            estKeysInRangeRatio = ((double) sstable.estimatedKeysForRanges(ranges)) / estimatedKeys;

        length += sstable.uncompressedLength() * estKeysInRangeRatio;
    }

    totalLength = length;
    Collections.sort(this.sstables, SSTableReader.sstableComparator);
    sstableIterator = this.sstables.iterator();
    assert sstableIterator.hasNext(); // caller should check intersecting first
    currentScanner = sstableIterator.next().getScanner(ranges, CompactionManager.instance.getRateLimiter());
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
@Test
public void testGetNeighborsPlusOneInLocalDC() throws Throwable
{
    TokenMetadata tmd = StorageService.instance.getTokenMetadata();
    
    // generate rf+1 nodes, and ensure that all nodes are returned
    Set<InetAddress> expected = addTokens(1 + Keyspace.open(keyspaceName).getReplicationStrategy().getReplicationFactor());
    expected.remove(FBUtilities.getBroadcastAddress());
    // remove remote endpoints
    TokenMetadata.Topology topology = tmd.cloneOnlyTokenMap().getTopology();
    HashSet<InetAddress> localEndpoints = Sets.newHashSet(topology.getDatacenterEndpoints().get(DatabaseDescriptor.getLocalDataCenter()));
    expected = Sets.intersection(expected, localEndpoints);

    Collection<Range<Token>> ranges = StorageService.instance.getLocalRanges(keyspaceName);
    Set<InetAddress> neighbors = new HashSet<InetAddress>();
    for (Range<Token> range : ranges)
    {
        neighbors.addAll(ActiveRepairService.getNeighbors(keyspaceName, range, Arrays.asList(DatabaseDescriptor.getLocalDataCenter()), null));
    }
    assertEquals(expected, neighbors);
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
@Test
public void testMoveRight() throws UnknownHostException
{
    // Moves to the right : last part to fetch, nothing to stream

    int movingNodeIdx = 1;
    BigIntegerToken newToken = new BigIntegerToken("35267647932558653966460912964485513216");
    BigIntegerToken[] tokens = initTokens();
    BigIntegerToken[] tokensAfterMove = initTokensAfterMove(tokens, movingNodeIdx, newToken);
    Pair<Set<Range<Token>>, Set<Range<Token>>> ranges = calculateStreamAndFetchRanges(tokens, tokensAfterMove, movingNodeIdx);

    assertEquals("No data should be streamed", ranges.left.size(), 0);
    assertEquals(ranges.right.iterator().next().left, tokens[movingNodeIdx]);
    assertEquals(ranges.right.iterator().next().right, tokensAfterMove[movingNodeIdx]);

}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/**
 * If the key is to be associated with a valid value, a mutation is created
 * for it with the given column family and columns. In the event the value
 * in the column is missing (i.e., null), then it is marked for
 * {@link Deletion}. Similarly, if the entire value for a key is missing
 * (i.e., null), then the entire key is marked for {@link Deletion}.
 * </p>
 *
 * @param keybuff
 *            the key to write.
 * @param value
 *            the value to write.
 * @throws IOException
 */
@Override
public void write(ByteBuffer keybuff, List<Mutation> value) throws IOException
{
    Range<Token> range = ringCache.getRange(keybuff);

    // get the client for the given range, or create a new one
    RangeClient client = clients.get(range);
    if (client == null)
    {
        // haven't seen keys for this range: create new client
        client = new RangeClient(ringCache.getEndpoint(range));
        client.start();
        clients.put(range, client);
    }

    for (Mutation amut : value)
        client.put(Pair.create(keybuff, amut));
        progressable.progress();
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/**
 * @param sstable SSTable to scan; must not be null
 * @param tokenRanges A set of token ranges to scan
 * @param limiter background i/o RateLimiter; may be null
 */
private SSTableScanner(SSTableReader sstable, Collection<Range<Token>> tokenRanges, RateLimiter limiter)
{
    assert sstable != null;

    this.dfile = limiter == null ? sstable.openDataReader() : sstable.openDataReader(limiter);
    this.ifile = sstable.openIndexReader();
    this.sstable = sstable;
    this.dataRange = null;

    List<AbstractBounds<RowPosition>> boundsList = new ArrayList<>(tokenRanges.size());
    for (Range<Token> range : Range.normalize(tokenRanges))
        addRange(range.toRowBounds(), boundsList);

    this.rangeIterator = boundsList.iterator();
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/** see CASSANDRA-5407 */
@Test
public void testGetScannerForNoIntersectingRanges() throws Exception
{
    Keyspace keyspace = Keyspace.open(KEYSPACE1);
    ColumnFamilyStore store = keyspace.getColumnFamilyStore("Standard1");
    partitioner = store.getPartitioner();

    new RowUpdateBuilder(store.metadata, 0, "k1")
        .clustering("xyz")
        .add("val", "abc")
        .build()
        .applyUnsafe();

    store.forceBlockingFlush();
    boolean foundScanner = false;
    for (SSTableReader s : store.getLiveSSTables())
    {
        try (ISSTableScanner scanner = s.getScanner(new Range<Token>(t(0), t(1)), null))
        {
            scanner.next(); // throws exception pre 5407
            foundScanner = true;
        }
    }
    assertTrue(foundScanner);
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/**
 * Create repair job to run on specific columnfamily
 */
public RepairJob(UUID sessionId, String keyspace, String columnFamily, Range<Token> range, boolean isSequential)
{
    this.desc = new RepairJobDesc(sessionId, keyspace, columnFamily, range);
    this.isSequential = isSequential;
    this.treeRequests = new RequestCoordinator<InetAddress>(isSequential)
    {
        public void send(InetAddress endpoint)
        {
            ValidationRequest request = new ValidationRequest(desc, gcBefore);
            MessagingService.instance().sendOneWay(request.createMessage(), endpoint);
        }
    };
    this.differencers = new RequestCoordinator<Differencer>(isSequential)
    {
        public void send(Differencer d)
        {
            StageManager.getStage(Stage.ANTI_ENTROPY).execute(d);
        }
    };
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
TreeRange getHelper(Hashable hashable, Token pleft, Token pright, byte depth, Token t)
{
    if (hashable instanceof Leaf)
    {
        // we've reached a hash: wrap it up and deliver it
        return new TreeRange(this, pleft, pright, depth, hashable);
    }
    // else: node.

    Inner node = (Inner)hashable;
    if (Range.contains(pleft, node.token, t))
        // left child contains token
        return getHelper(node.lchild, pleft, node.token, inc(depth), t);
    // else: right child contains token
    return getHelper(node.rchild, node.token, pright, inc(depth), t);
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
public Multimap<Range<Token>, InetAddress> getPendingRangesMM(String keyspaceName)
{
    Multimap<Range<Token>, InetAddress> map = HashMultimap.create();
    PendingRangeMaps pendingRangeMaps = this.pendingRanges.get(keyspaceName);

    if (pendingRangeMaps != null)
    {
        for (Map.Entry<Range<Token>, List<InetAddress>> entry : pendingRangeMaps)
        {
            Range<Token> range = entry.getKey();
            for (InetAddress address : entry.getValue())
            {
                map.put(range, address);
            }
        }
    }

    return map;
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
public int forceRepairAsync(String keyspace, RepairParallelism parallelismDegree, Collection<String> dataCenters, Collection<String> hosts, Collection<Range<Token>> ranges, boolean fullRepair, String... columnFamilies)
{
    if (ranges.isEmpty() || Keyspace.open(keyspace).getReplicationStrategy().getReplicationFactor() < 2)
        return 0;

    int cmd = nextRepairCommand.incrementAndGet();
    if (ranges.size() > 0)
    {
        if (FBUtilities.isWindows() && parallelismDegree != RepairParallelism.PARALLEL)
        {
            logger.warn("Snapshot-based repair is not yet supported on Windows.  Reverting to parallel repair.");
            parallelismDegree = RepairParallelism.PARALLEL;
        }
        new Thread(createRepairTask(cmd, keyspace, ranges, parallelismDegree, dataCenters, hosts, fullRepair, columnFamilies)).start();
    }
    return cmd;
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/**
 * @return list of Token ranges (_not_ keys!) together with estimated key count,
 *      breaking up the data this node is responsible for into pieces of roughly keysPerSplit
 */
public List<Pair<Range<Token>, Long>> getSplits(String keyspaceName, String cfName, Range<Token> range, int keysPerSplit)
{
    Keyspace t = Keyspace.open(keyspaceName);
    ColumnFamilyStore cfs = t.getColumnFamilyStore(cfName);
    List<DecoratedKey> keys = keySamples(Collections.singleton(cfs), range);

    long totalRowCountEstimate = cfs.estimatedKeysForRange(range);

    // splitCount should be much smaller than number of key samples, to avoid huge sampling error
    int minSamplesPerSplit = 4;
    int maxSplitCount = keys.size() / minSamplesPerSplit + 1;
    int splitCount = Math.max(1, Math.min(maxSplitCount, (int)(totalRowCountEstimate / keysPerSplit)));

    List<Token> tokens = keysToTokens(range, keys);
    return getSplits(tokens, splitCount, cfs);
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
private void transfer(SSTableReader sstable, List<Range<Token>> ranges) throws Exception
{
    StreamPlan streamPlan = new StreamPlan("StreamingTransferTest").transferFiles(LOCAL, makeStreamingDetails(ranges, Refs.tryRef(Arrays.asList(sstable))));
    streamPlan.execute().get();
    verifyConnectionsAreClosed();

    //cannot add files after stream session is finished
    try
    {
        streamPlan.transferFiles(LOCAL, makeStreamingDetails(ranges, Refs.tryRef(Arrays.asList(sstable))));
        fail("Should have thrown exception");
    }
    catch (RuntimeException e)
    {
        //do nothing
    }
}
 

import org.apache.cassandra.dht.Range; //导入依赖的package包/类
/** @return the number of nodes bootstrapping into source's primary range */
public int pendingRangeChanges(InetAddress source)
{
    int n = 0;
    Collection<Range<Token>> sourceRanges = getPrimaryRangesFor(getTokens(source));
    lock.readLock().lock();
    try
    {
        for (Token token : bootstrapTokens.keySet())
            for (Range<Token> range : sourceRanges)
                if (range.contains(token))
                    n++;
    }
    finally
    {
        lock.readLock().unlock();
    }
    return n;
}