Examples with GraphQlService org.springframework.graphql.GraphQlService used on opensource projects

Example 1 with GraphQlService

use of org.springframework.graphql.GraphQlService in project spring-graphql by spring-projects.

the class BatchLoadingTests method batchLoader.

@Test
void batchLoader() {
    String document = "{ " + "  booksByCriteria(criteria: {author:\"Orwell\"}) { " + "    author {" + "      firstName, " + "      lastName " + "    }" + "  }" + "}";
    this.registry.forTypePair(Long.class, Author.class).registerBatchLoader((ids, env) -> Flux.fromIterable(ids).map(BookSource::getAuthor));
    GraphQlService service = GraphQlSetup.schemaResource(BookSource.schema).queryFetcher("booksByCriteria", env -> {
        Map<String, Object> criteria = env.getArgument("criteria");
        String authorName = (String) criteria.get("author");
        return BookSource.findBooksByAuthor(authorName).stream().map(book -> new Book(book.getId(), book.getName(), book.getAuthorId())).collect(Collectors.toList());
    }).dataFetcher("Book", "author", env -> {
        Book book = env.getSource();
        DataLoader<Long, Author> dataLoader = env.getDataLoader(Author.class.getName());
        return dataLoader.load(book.getAuthorId());
    }).dataLoaders(this.registry).toGraphQlService();
    Mono<RequestOutput> resultMono = service.execute(TestRequestInput.forDocument(document));
    List<Book> books = GraphQlResponse.from(resultMono).toList("booksByCriteria", Book.class);
    assertThat(books).hasSize(2);
    Author author = books.get(0).getAuthor();
    assertThat(author).isNotNull();
    assertThat(author.getFirstName()).isEqualTo("George");
    assertThat(author.getLastName()).isEqualTo("Orwell");
}