com.graphql_java_generator.samples.basic.server

Interface QueryDataFetchersDelegate

All Known Implementing Classes:

QueryDataFetchersDelegateImpl

public interface QueryDataFetchersDelegate

Author:

generated by graphql-java-generator

See Also:

https://github.com/graphql-java-generator/graphql-java-generator

Method Summary

Modifier and Type	Method and Description
String	hello(graphql.schema.DataFetchingEnvironment dataFetchingEnvironment, String name) This method loads the data for Query.hello.

Method Detail

hello

String hello(graphql.schema.DataFetchingEnvironment dataFetchingEnvironment,
             String name)

This method loads the data for Query.hello.
For optimization, this method returns a CompletableFuture. 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.
You can implements this method like this:

Parameters:

dataFetchingEnvironment - The GraphQL DataFetchingEnvironment. It gives you access to the full GraphQL context for this DataFetcher

name - The input parameter sent in the query by the GraphQL consumer

Throws:

NoSuchElementException - This method may return a NoSuchElementException exception. In this case, the exception is trapped by the calling method, and the return is consider as null. This allows to use the Optional.get() method directly, without caring of wheter or not there is a value. The generated code will take care of the NoSuchElementException exception.