Interface QueryRouter

public interface QueryRouter
An interface used by Queries to route themselves to an appropriate DataNode. As of 1.2 QueryRouter only supports routing by DataMap.
Since:
1.2

  • Method Details

    • route

      void route(DataNode node, Query query, Query substitutedQuery)
      A callback method that allows a query to set its preferred node during the routing phase. It allows query to further customize its routing, e.g. it is possible to implement query chains that pass multiple queries for execution.
      Parameters:
      node - node to use for query execution
      query - A query to execute.
      substitutedQuery - a query that was substituted for "query". Results must be mapped back to substituted query.

    • nodeForName

      DataNode nodeForName(String name)
      Returns a DataNode for a given name. If the name is null, a default DataNode is returned. If there's no default node, an exception is thrown.
      Since:
      5.0

    • nodeForDataMap

      DataNode nodeForDataMap(DataMap map)
      Returns a DataNode that is configured to handle a given DataMap.
      Since:
      5.0

    • engineForName

      @Deprecated(since="5.0", forRemoval=true) default DataNode engineForName(String name)
      Deprecated, for removal: This API element is subject to removal in a future version.
      renamed to nodeForName(String).
      Since:
      4.0

    • engineForDataMap

      @Deprecated(since="5.0", forRemoval=true) default DataNode engineForDataMap(DataMap map)
      Deprecated, for removal: This API element is subject to removal in a future version.
      renamed to nodeForDataMap(DataMap).