Examples of org.apache.cassandra.cql3.UntypedResultSet

org.apache.cassandra.cql3.UntypedResultSet
a utility for doing internal cql-based queries

        else
        {
            ColumnFamilyStore cfs = table.getColumnFamilyStore(LOCAL_CF);


            String req = "SELECT cluster_name FROM system.%s WHERE key='%s'";
            UntypedResultSet result = processInternal(String.format(req, LOCAL_CF, LOCAL_KEY));


            if (result.isEmpty() || !result.one().has("cluster_name"))
            {


                // this is a brand new node
                if (!cfs.getSSTables().isEmpty())
                    throw new ConfigurationException("Found system table files, but they couldn't be loaded!");


                // no system files.  this is a new node.
                req = "INSERT INTO system.%s (key, cluster_name) VALUES ('%s', '%s')";
                processInternal(String.format(req, LOCAL_CF, LOCAL_KEY, DatabaseDescriptor.getClusterName()));
                return;
            }


            savedClusterName = result.one().getString("cluster_name");
        }


        if (!DatabaseDescriptor.getClusterName().equals(savedClusterName))
            throw new ConfigurationException("Saved cluster name " + savedClusterName + " != configured name " + DatabaseDescriptor.getClusterName());
    }

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    }


    public static Collection<Token> getSavedTokens()
    {
        String req = "SELECT tokens FROM system.%s WHERE key='%s'";
        UntypedResultSet result = processInternal(String.format(req, LOCAL_CF, LOCAL_KEY));
        return result.isEmpty() || !result.one().has("tokens")
             ? Collections.<Token>emptyList()
             : deserializeTokens(result.one().<String>getSet("tokens", UTF8Type.instance));
    }

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    }


    public static int incrementAndGetGeneration()
    {
        String req = "SELECT gossip_generation FROM system.%s WHERE key='%s'";
        UntypedResultSet result = processInternal(String.format(req, LOCAL_CF, LOCAL_KEY));


        int generation;
        if (result.isEmpty() || !result.one().has("gossip_generation"))
        {
            // seconds-since-epoch isn't a foolproof new generation
            // (where foolproof is "guaranteed to be larger than the last one seen at this ip address"),
            // but it's as close as sanely possible
            generation = (int) (System.currentTimeMillis() / 1000);
        }
        else
        {
            // Other nodes will ignore gossip messages about a node that have a lower generation than previously seen.
            final int storedGeneration = result.one().getInt("gossip_generation") + 1;
            final int now = (int) (System.currentTimeMillis() / 1000);
            if (storedGeneration >= now)
            {
                logger.warn("Using stored Gossip Generation {} as it is greater than current system time {}.  See CASSANDRA-3654 if you experience problems",
                            storedGeneration, now);

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    }


    public static BootstrapState getBootstrapState()
    {
        String req = "SELECT bootstrapped FROM system.%s WHERE key='%s'";
        UntypedResultSet result = processInternal(String.format(req, LOCAL_CF, LOCAL_KEY));


        if (result.isEmpty() || !result.one().has("bootstrapped"))
            return BootstrapState.NEEDS_BOOTSTRAP;


        return BootstrapState.valueOf(result.one().getString("bootstrapped"));
    }

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    public static UUID getLocalHostId()
    {
        UUID hostId = null;


        String req = "SELECT host_id FROM system.%s WHERE key='%s'";
        UntypedResultSet result = processInternal(String.format(req, LOCAL_CF, LOCAL_KEY));


        // Look up the Host UUID (return it if found)
        if (!result.isEmpty() && result.one().has("host_id"))
        {
            return result.one().getUUID("host_id");
        }


        // ID not found, generate a new one, persist, and then return it.
        hostId = UUID.randomUUID();
        logger.warn("No host ID found, created {} (Note: This should happen exactly once per node).", hostId);

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        int throttleInKB = DatabaseDescriptor.getBatchlogReplayThrottleInKB() / StorageService.instance.getTokenMetadata().getAllEndpoints().size();
        RateLimiter rateLimiter = RateLimiter.create(throttleInKB == 0 ? Double.MAX_VALUE : throttleInKB * 1024);


        try
        {
            UntypedResultSet page = process("SELECT id, data, written_at FROM %s.%s LIMIT %d",
                                            Table.SYSTEM_KS,
                                            SystemTable.BATCHLOG_CF,
                                            PAGE_SIZE);


            while (!page.isEmpty())
            {
                UUID id = processBatchlogPage(page, rateLimiter);


                if (page.size() < PAGE_SIZE)
                    break; // we've exhausted the batchlog, next query would be empty.


                page = process("SELECT id, data, written_at FROM %s.%s WHERE token(id) > token(%s) LIMIT %d",
                               Table.SYSTEM_KS,
                               SystemTable.BATCHLOG_CF,

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        String password = credentials.get(PASSWORD_KEY);
        if (password == null)
            throw new AuthenticationException(String.format("Required key '%s' is missing", PASSWORD_KEY));


        UntypedResultSet result;
        try
        {
            ResultMessage.Rows rows = authenticateStatement.execute(consistencyForUser(username),
                                                                    new QueryState(new ClientState(true)),
                                                                    Lists.newArrayList(ByteBufferUtil.bytes(username)));
            result = new UntypedResultSet(rows.result);
        }
        catch (RequestValidationException e)
        {
            throw new AssertionError(e); // not supposed to happen
        }
        catch (RequestExecutionException e)
        {
            throw new AuthenticationException(e.toString());
        }


        if (result.isEmpty() || !BCrypt.checkpw(password, result.one().getString(SALTED_HASH)))
            throw new AuthenticationException("Username and/or password are incorrect");


        return new AuthenticatedUser(username);
    }

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     * @param username Username to query.
     * @return true is the user is a superuser, false if they aren't or don't exist at all.
     */
    public static boolean isSuperuser(String username)
    {
        UntypedResultSet result = selectUser(username);
        return !result.isEmpty() && result.one().getBoolean("super");
    }

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        try
        {
            ResultMessage.Rows rows = selectUserStatement.execute(consistencyForUser(username),
                                                                  new QueryState(new ClientState(true)),
                                                                  Lists.newArrayList(ByteBufferUtil.bytes(username)));
            return new UntypedResultSet(rows.result);
        }
        catch (RequestValidationException e)
        {
            throw new AssertionError(e); // not supposed to happen
        }

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        assertEquals(500, BatchlogManager.instance.countAllBatches());
        assertEquals(500, BatchlogManager.instance.getTotalBatchesReplayed());


        for (int i = 0; i < 1000; i++)
        {
            UntypedResultSet result = QueryProcessor.processInternal(String.format("SELECT * FROM \"Keyspace1\".\"Standard1\" WHERE key = intAsBlob(%d)", i));
            if (i < 500)
            {
                assertEquals(bytes(i), result.one().getBytes("key"));
                assertEquals(bytes(i), result.one().getBytes("column1"));
                assertEquals(bytes(i), result.one().getBytes("value"));
            }
            else
            {
                assertTrue(result.isEmpty());
            }
        }


        // Ensure that no stray mutations got somehow applied.
        UntypedResultSet result = QueryProcessor.processInternal(String.format("SELECT count(*) FROM \"Keyspace1\".\"Standard1\""));
        assertEquals(500, result.one().getLong("count"));
    }

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