Examples of org.apache.cassandra.dht.Range

org.apache.cassandra.dht.Range
A representation of the range that a node is responsible for on the DHT ring. Author : Avinash Lakshman ( alakshman@facebook.com) & Prashant Malik ( pmalik@facebook.com )

        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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        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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        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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        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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    {
        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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        // check that it is correctly marked as leaving in tmd
        assertTrue(tmd.isLeaving(hosts.get(2)));


        // check that pending ranges are correct (primary range should go to 1st node, first
        // replica range to 4th node and 2nd replica range to 5th node)
        assertTrue(tmd.getPendingRanges(hosts.get(0)).get(0).equals(new Range(endPointTokens.get(1),
                                                                              endPointTokens.get(2))));
        assertTrue(tmd.getPendingRanges(hosts.get(3)).get(0).equals(new Range(endPointTokens.get(4),
                                                                              endPointTokens.get(0))));
        assertTrue(tmd.getPendingRanges(hosts.get(4)).get(0).equals(new Range(endPointTokens.get(0),
                                                                              endPointTokens.get(1))));


        for (int i=0; i<keyTokens.size(); ++i)
        {
            Collection<InetAddress> endPoints = testStrategy.getWriteEndpoints(keyTokens.get(i), testStrategy.getNaturalEndpoints(keyTokens.get(i)));

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        List<TokenRange> ranges = new ArrayList<TokenRange>();
        Token.TokenFactory tf = getPartitioner().getTokenFactory();


        for (Map.Entry<Range<Token>, List<InetAddress>> entry : getRangeToAddressMap(keyspace).entrySet())
        {
            Range range = entry.getKey();
            List<InetAddress> addresses = entry.getValue();
            List<String> endpoints = new ArrayList<String>(addresses.size());
            List<String> rpc_endpoints = new ArrayList<String>(addresses.size());
            List<EndpointDetails> epDetails = new ArrayList<EndpointDetails>(addresses.size());

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        List<TokenRange> ranges = new ArrayList<TokenRange>();
        Token.TokenFactory tf = getPartitioner().getTokenFactory();


        for (Map.Entry<Range<Token>, List<InetAddress>> entry : getRangeToAddressMap(keyspace).entrySet())
        {
            Range range = entry.getKey();
            List<InetAddress> addresses = entry.getValue();
            List<String> endpoints = new ArrayList<String>(addresses.size());
            List<String> rpc_endpoints = new ArrayList<String>(addresses.size());
            List<EndpointDetails> epDetails = new ArrayList<EndpointDetails>(addresses.size());

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            return Collections.emptyList();
        List<Range> ranges = new ArrayList<Range>();
        int size = sortedTokens.size();
        for (int i = 1; i < size; ++i)
        {
            Range range = new Range(sortedTokens.get(i - 1), sortedTokens.get(i));
            ranges.add(range);
        }
        Range range = new Range(sortedTokens.get(size - 1), sortedTokens.get(0));
        ranges.add(range);


        return ranges;
    }

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    }


    /** return a token to which if a node bootstraps it will get about 1/2 of this node's range */
    public Token getBootstrapToken()
    {
        Range range = getLocalPrimaryRange();
        List<DecoratedKey> keys = new ArrayList<DecoratedKey>();
        for (ColumnFamilyStore cfs : ColumnFamilyStore.all())
        {
            for (DecoratedKey key : cfs.allKeySamples())
            {
                if (range.contains(key.token))
                    keys.add(key);
            }
        }
        FBUtilities.sortSampledKeys(keys, range);

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