Package org.forum.server.specific_code

Class DataFetchersDelegatePostImpl

java.lang.Object
org.forum.server.specific_code.DataFetchersDelegatePostImpl
All Implemented Interfaces:
DataFetchersDelegatePost
@Component public class DataFetchersDelegatePostImpl extends Object implements DataFetchersDelegatePost
Author:
etienne-sf

  • Field Details

    • logger

      protected org.slf4j.Logger logger
      The logger for this instance

  • Constructor Details

    • DataFetchersDelegatePostImpl

      public DataFetchersDelegatePostImpl()

  • Method Details

    • author

      public reactor.core.publisher.Flux<Member> author(org.dataloader.BatchLoaderEnvironment batchLoaderEnvironment, graphql.GraphQLContext graphQLContext, List<Post> keys)
      Description copied from interface: DataFetchersDelegatePost
      This methods loads the data for ${dataFetcher.graphQLType}.author. It is generated as the generateBatchMappingDataFetchers plugin parameter is true.
      Specified by:
      author in interface DataFetchersDelegatePost
      Parameters:
      batchLoaderEnvironment - The environement for this batch loaded. You can extract the GraphQLContext from this parameter.
      keys - The objects for which the value for the author field must be retrieved.
      Returns:
      This method returns ${dataFetcher.batchMappingReturnType.value}, as defined by the batchMappingDataFetcherReturnType plugin parameter.
      Please look at the spring-graphql annotation for a documentation on how to return the proper values

    • unorderedReturnBatchLoader

      public List<Post> unorderedReturnBatchLoader(List<Long> keys, org.dataloader.BatchLoaderEnvironment env)
      Description copied from interface: DataFetchersDelegatePost
      This method loads a list of ${dataFetcher.field.name}, based on the list of id to be fetched. This method is used by graphql-java java-dataloader to highly optimize the number of requests to the server, when recursing down through the object associations.
      You can find more information on this page: graphql-java batching
      Important notes:
      • The list returned may be in any order: this method is called by the default implementation of batchLoader, which will sort the value return by this method, according to the given keys list.
      • There may be missing values (no value for a given key): the default implementation of batchLoader will replace these missing values by a null value at this key's position.
      • One of batchLoader or unorderedReturnBatchLoader must be overriden in the data fetcher implementation. If not, then a NullPointerException will be thrown at runtime, with a proper error message.
      • If your data storage implementation makes it complex to return values in the same order as the keys list, then it's easier to override unorderedReturnBatchLoader, and let the default implementation of batchLoader order the values
      • If your data storage implementation makes it easy to return values in the same order as the keys list, then the execution is a little quicker if you override batchLoader, as there would be no sort of the returned list.
      Specified by:
      unorderedReturnBatchLoader in interface DataFetchersDelegatePost
      Parameters:
      keys - A list of ID's id, for which the matching objects must be returned
      env - The Data Loader environment
      Returns: