Package org.apache.cassandra.dht

Examples of org.apache.cassandra.dht.IPartitioner

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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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            throw new InvalidRequestException("exactly one of {start key, end key} or {start token, end token} must be specified");
        }

        if (range.start_key != null)
        {
            IPartitioner p = StorageService.getPartitioner();
            Token startToken = p.getToken(range.start_key);
            Token endToken = p.getToken(range.end_key);
            if (startToken.compareTo(endToken) > 0 && !endToken.equals(p.getMinimumToken()))
            {
                if (p instanceof RandomPartitioner)
                    throw new InvalidRequestException("start key's md5 sorts after end key's md5.  this is not allowed; you probably should not specify end key at all, under RandomPartitioner");
                else
                    throw new InvalidRequestException("start key must sort before (or equal to) finish key in your partitioner!");
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    @Test
    public void testValidatorAdd() throws Throwable
    {
        Validator validator = new Validator(new CFPair(tablename, cfname));
        IPartitioner part = validator.tree.partitioner();
        Token min = part.getMinimumToken();
        Token mid = part.midpoint(min, min);
        validator.prepare();

        // add a row with the minimum token
        validator.add(new CompactedRow(new DecoratedKey(min, "nonsense!"),
                                       new DataOutputBuffer()));
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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 = table.getColumnFamilyStore("Indexed1").scan(clause, range, filter);
        assert rows.size() == 0;

        expr = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(2L));
        clause = new IndexClause(Arrays.asList(expr), ByteBufferUtil.EMPTY_BYTE_BUFFER, 100);
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        // basic single-expression query
        IndexExpression expr1 = new IndexExpression(ByteBufferUtil.bytes("birthdate"), IndexOperator.EQ, ByteBufferUtil.bytes(1L));
        IndexExpression expr2 = new IndexExpression(ByteBufferUtil.bytes("notbirthdate"), IndexOperator.GT, ByteBufferUtil.bytes(1L));
        IndexClause clause = new IndexClause(Arrays.asList(new IndexExpression[]{ expr1, expr2 }), ByteBufferUtil.EMPTY_BYTE_BUFFER, 1);
        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() == 1 : StringUtils.join(rows, ",");
    }
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    private void queryBirthdate(Table table) throws CharacterCodingException
    {
        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.getColumnFamilyStore("Indexed2").scan(clause, range, filter);
        assert rows.size() == 1 : StringUtils.join(rows, ",");
        assertEquals("k1", ByteBufferUtil.string(rows.get(0).key.key));
    }
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    {
        StorageService ss = StorageService.instance();

        TokenMetadata tmd = ss.getTokenMetadata();
        tmd.clearUnsafe();
        IPartitioner partitioner = new RandomPartitioner();
        AbstractReplicationStrategy testStrategy = new RackUnawareStrategy(tmd, partitioner, 3);

        IPartitioner oldPartitioner = ss.setPartitionerUnsafe(partitioner);
        AbstractReplicationStrategy oldStrategy = ss.setReplicationStrategyUnsafe(testStrategy);

        ArrayList<Token> endPointTokens = new ArrayList<Token>();
        ArrayList<Token> keyTokens = new ArrayList<Token>();
        List<InetAddress> hosts = new ArrayList<InetAddress>();
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    public void testSimultaneousMove() throws UnknownHostException
    {
        StorageService ss = StorageService.instance();
        TokenMetadata tmd = ss.getTokenMetadata();
        tmd.clearUnsafe();
        IPartitioner partitioner = new RandomPartitioner();
        AbstractReplicationStrategy testStrategy = new RackUnawareStrategy(tmd, partitioner, 3);

        IPartitioner oldPartitioner = ss.setPartitionerUnsafe(partitioner);
        AbstractReplicationStrategy oldStrategy = ss.setReplicationStrategyUnsafe(testStrategy);

        ArrayList<Token> endPointTokens = new ArrayList<Token>();
        ArrayList<Token> keyTokens = new ArrayList<Token>();
        List<InetAddress> hosts = new ArrayList<InetAddress>();
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    public void testStateJumpToBootstrap() throws UnknownHostException
    {
        StorageService ss = StorageService.instance();
        TokenMetadata tmd = ss.getTokenMetadata();
        tmd.clearUnsafe();
        IPartitioner partitioner = new RandomPartitioner();
        AbstractReplicationStrategy testStrategy = new RackUnawareStrategy(tmd, partitioner, 3);

        IPartitioner oldPartitioner = ss.setPartitionerUnsafe(partitioner);
        AbstractReplicationStrategy oldStrategy = ss.setReplicationStrategyUnsafe(testStrategy);

        ArrayList<Token> endPointTokens = new ArrayList<Token>();
        ArrayList<Token> keyTokens = new ArrayList<Token>();
        List<InetAddress> hosts = new ArrayList<InetAddress>();
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Related Classes of org.apache.cassandra.dht.IPartitioner

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  • 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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