List of one() Examples

Examples of one()

com.datastax.driver.core.ResultSet.one()
Returns the next result from this ResultSet. @return the next row in this resultSet or null if this ResultSet isexhausted.
com.mongodb.DBCursor.one()
Returns the first document that matches the query. @return the first matching document @since 2.12
com.tinkerpop.gremlin.driver.ResultSet.one()
Get the next {@link Result} from the stream, blocking until one is available.
edu.cmu.sphinx.fst.semiring.Semiring.one()
Semiring's one element
kodkod.ast.Expression.one()
Returns the formula 'one this'. The effect of this method is the same as calling this.apply(ONE). @return this.apply(ONE)
kodkod.engine.bool.BooleanMatrix.one()
Returns a BooleanValue that constraints exactly one value in this.elements to be true. @return { f: BooleanValue | f <=> #this.elements[int] = 1 }
org.apache.cassandra.cql3.UntypedResultSet.one()
org.sgx.yuigwt.yui.node.Node.one()
selects one node that match the selector relative to this node. @param sel @return
org.sgx.yuigwt.yuigallery.YuiGalleryContext.one()
ptolemy.data.Token.one()
Returns a new Token representing the multiplicative identity. It should be overridden in subclasses. @exception IllegalActionException If this method is notsupported by the derived class. @return A new Token containing the multiplicative identity.If this token is a nil token, then {@link #NIL} is returned.

Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

    {
        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));
    }


    public static int incrementAndGetGeneration()
    {
        String req = "SELECT gossip_generation FROM system.%s WHERE key='%s'";

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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

    {
        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);

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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

            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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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

    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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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

        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"));
    }


    public static boolean bootstrapComplete()
    {
        return getBootstrapState() == BootstrapState.COMPLETED;

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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()


        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.

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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

        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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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

    {
        String query = String.format("SELECT super FROM %s.%s WHERE name = '%s'", AUTH_KS, USERS_CF, escape(username));
        try
        {
            UntypedResultSet result = QueryProcessor.process(query);
            return !result.isEmpty() && result.one().getBoolean("super");
        }
        catch (RequestExecutionException e)
        {
            throw new RuntimeException(e);
        }

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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

        String req = "SELECT truncated_at FROM system.%s WHERE key = '%s'";
        UntypedResultSet rows = processInternal(String.format(req, LOCAL_CF, LOCAL_KEY));
        if (rows.isEmpty())
            return Collections.emptyMap();


        UntypedResultSet.Row row = rows.one();
        Map<UUID, ByteBuffer> rawMap = row.getMap("truncated_at", UUIDType.instance, BytesType.instance);
        if (rawMap == null)
            return Collections.emptyMap();


        Map<UUID, Pair<ReplayPosition, Long>> positions = new HashMap<UUID, Pair<ReplayPosition, Long>>();

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Examples of org.apache.cassandra.cql3.UntypedResultSet.one()

        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!");

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