Package org.apache.cassandra.dht

Examples of org.apache.cassandra.dht.IPartitioner

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        sliceRange.setStart(new byte[0]).setFinish(new byte[0]);
        sliceRange.setCount(column_count);
        predicate.setSlice_range(sliceRange);

        // From keys "" to ""...
        IPartitioner partitioner = StorageService.getPartitioner();
        ByteBuffer empty = ByteBufferUtil.EMPTY_BYTE_BUFFER;
        Range range = new Range(partitioner.getToken(empty), partitioner.getToken(empty));

        // Get a bunch of rows!
        List<Row> rows;
        try
        {
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    /**
     * Record token being used by another node
     */
    public static synchronized void updateToken(InetAddress ep, Token token)
    {
        IPartitioner p = StorageService.getPartitioner();
        ColumnFamily cf = ColumnFamily.create(Table.SYSTEM_TABLE, STATUS_CF);
        cf.addColumn(new Column(p.getTokenFactory().toByteArray(token), ByteBuffer.wrap(ep.getAddress()), System.currentTimeMillis()));
        RowMutation rm = new RowMutation(Table.SYSTEM_TABLE, RING_KEY);
        rm.add(cf);
        try
        {
            rm.apply();
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    /**
     * Remove stored token being used by another node
     */
    public static synchronized void removeToken(Token token)
    {
        IPartitioner p = StorageService.getPartitioner();
        RowMutation rm = new RowMutation(Table.SYSTEM_TABLE, RING_KEY);
        rm.delete(new QueryPath(STATUS_CF, null, p.getTokenFactory().toByteArray(token)), System.currentTimeMillis());
        try
        {
            rm.apply();
        }
        catch (IOException e)
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    /**
     * This method is used to update the System Table with the new token for this node
    */
    public static synchronized void updateToken(Token token)
    {
        IPartitioner p = StorageService.getPartitioner();
        ColumnFamily cf = ColumnFamily.create(Table.SYSTEM_TABLE, STATUS_CF);
        cf.addColumn(new Column(SystemTable.TOKEN, p.getTokenFactory().toByteArray(token), System.currentTimeMillis()));
        RowMutation rm = new RowMutation(Table.SYSTEM_TABLE, LOCATION_KEY);
        rm.add(cf);
        try
        {
            rm.apply();
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     *
     */
    public static HashMap<Token, InetAddress> loadTokens()
    {
        HashMap<Token, InetAddress> tokenMap = new HashMap<Token, InetAddress>();
        IPartitioner p = StorageService.getPartitioner();
        Table table = Table.open(Table.SYSTEM_TABLE);
        QueryFilter filter = QueryFilter.getIdentityFilter(decorate(RING_KEY), new QueryPath(STATUS_CF));
        ColumnFamily cf = table.getColumnFamilyStore(STATUS_CF).getColumnFamily(filter);
        if (cf != null)
        {
            for (IColumn column : cf.getSortedColumns())
            {
                try
                {
                    ByteBuffer v = column.value();
                    byte[] addr = new byte[v.remaining()];
                    ByteBufferUtil.arrayCopy(v, v.position(), addr, 0, v.remaining());
                    tokenMap.put(p.getTokenFactory().fromByteArray(column.name()), InetAddress.getByAddress(addr));
                }
                catch (UnknownHostException e)
                {
                    throw new IOError(e);
                }
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        // verify we get it back w/ index query too
        IndexExpression expr = new IndexExpression(COLUMN, IndexOperator.EQ, VALUE);
        IndexClause clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, Integer.MAX_VALUE);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        rows = table.getColumnFamilyStore(CF1).scan(clause, range, filter);
        assertEquals(LOOPS, rows.size());

        // we don't allow cleanup when the local host has no range to avoid wipping up all data when a node has not join the ring.
        // So to make sure cleanup erase everything here, we give the localhost the tiniest possible range.
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    @Test
    public void testSkipStartKey() throws IOException, ExecutionException, InterruptedException
    {
        ColumnFamilyStore cfs = insertKey1Key2();

        IPartitioner p = StorageService.getPartitioner();
        List<Row> result = cfs.getRangeSlice(ByteBufferUtil.EMPTY_BYTE_BUFFER,
                                             Util.range(p, "key1", "key2"),
                                             10,
                                             new NamesQueryFilter(ByteBufferUtil.bytes("asdf")));
        assertEquals(1, result.size());
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        // basic single-expression query
        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(1L));
        IndexClause clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, 100);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        List<Row> rows = Table.open("Keyspace1").getColumnFamilyStore("Indexed1").scan(clause, range, filter);

        assert rows != null;
        assert rows.size() == 2 : StringUtils.join(rows, ",");
       
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        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(34L));
        IndexExpression expr2 = new IndexExpression(ByteBufferUtil.bytes("notbirthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(1L));
        IndexClause clause = new IndexClause(Arrays.asList(expr, expr2), ByteBufferUtil.EMPTY_BYTE_BUFFER, 100);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        List<Row> rows = Table.open("Keyspace1").getColumnFamilyStore("Indexed1").scan(clause, range, filter);

        assert rows != null;
        assert rows.size() == 50 : rows.size();
        Set<DecoratedKey> keys = new HashSet<DecoratedKey>();
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        rm.apply();

        IndexExpression expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(1L));
        IndexClause clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, 100);
        IFilter filter = new IdentityQueryFilter();
        IPartitioner p = StorageService.getPartitioner();
        Range range = new Range(p.getMinimumToken(), p.getMinimumToken());
        List<Row> rows = cfs.scan(clause, range, filter);
        assert rows.size() == 1 : StringUtils.join(rows, ",");
        String key = new String(rows.get(0).key.key.array(),rows.get(0).key.key.position(),rows.get(0).key.key.remaining());
        assert "k1".equals( key );
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Related Classes of org.apache.cassandra.dht.IPartitioner

  • org.apache.cassandra.avro.AvroValidation
  • org.apache.cassandra.db.BatchlogManager
  • org.apache.cassandra.db.BinaryMemtable
  • org.apache.cassandra.db.CleanupTest
  • org.apache.cassandra.db.ColumnFamilyStore
  • org.apache.cassandra.db.ColumnFamilyStoreTest
  • org.apache.cassandra.db.DBManager
  • org.apache.cassandra.db.HintedHandOffManager
  • org.apache.cassandra.db.Memtable
  • org.apache.cassandra.db.SerializationsTest
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