Package org.forum.server.specific_code

Class DataFetchersDelegateSubscriptionImpl

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

  • Constructor Details

    • DataFetchersDelegateSubscriptionImpl

      public DataFetchersDelegateSubscriptionImpl()

  • Method Details

    • subscribeToNewPost

      public reactor.core.publisher.Flux<Post> subscribeToNewPost(graphql.schema.DataFetchingEnvironment dataFetchingEnvironment, String boardName)
      Description copied from interface: DataFetchersDelegateSubscription
      This method loads the data for Subscription.subscribeToNewPost. It may return whatever is accepted by the Spring Controller, that is:
      • A resolved value of any type (typically, a org.forum.server.graphql.Post)
      • Mono and Flux for asynchronous value(s). Supported for controller methods and for any DataFetcher as described in Reactive DataFetcher. This would typically be a Mono<org.forum.server.graphql.Post> or a Flux<org.forum.server.graphql.Post>
      • Kotlin coroutine and Flow are adapted to Mono and Flux
      • java.util.concurrent.Callable to have the value(s) produced asynchronously. For this to work, AnnotatedControllerConfigurer must be configured with an Executor. This would typically by a Callable<org.forum.server.graphql.Post>
      As a complement to the spring-graphql documentation, you may also return:
      • A CompletableFuture<?>, for instance CompletableFuture<org.forum.server.graphql.Post>. This allows to use graphql-java java-dataloader to highly optimize the number of requests to the server. The principle is this one: The data loader collects all the data to load, avoid to load several times the same data, and allows parallel execution of the queries, if multiple queries are to be run.
      • A Publisher (instead of a Flux), for Subscription for instance
      Specified by:
      subscribeToNewPost in interface DataFetchersDelegateSubscription
      Parameters:
      dataFetchingEnvironment - The GraphQL DataFetchingEnvironment. It gives you access to the full GraphQL context for this DataFetcher
      boardName - The input parameter sent in the query by the GraphQL consumer, as defined in the GraphQL schema.