Class ExecutionExamples

src/test/groovy/readme/ExecutionExamples.java:37–318

import static graphql.StarWarsSchema.queryType;

@SuppressWarnings({"unused", "UnnecessaryLocalVariable", "Convert2Lambda", "unused", "ClassCanBeStatic", "TypeParameterUnusedInFormals"})
public class ExecutionExamples {

    public static void main(String[] args) throws Exception {
        new ExecutionExamples().simpleQueryExecution();
    }

    private void simpleQueryExecution() throws Exception {
        //::FigureA
        GraphQLSchema schema = GraphQLSchema.newSchema()
                .query(queryType)
                .build();

        GraphQL graphQL = GraphQL.newGraphQL(schema)
                .build();

        ExecutionInput executionInput = ExecutionInput.newExecutionInput().query("query { hero { name } }")
                .build();

        ExecutionResult executionResult = graphQL.execute(executionInput);

        Object data = executionResult.getData();
        List<GraphQLError> errors = executionResult.getErrors();
        //::/FigureA
    }

    @SuppressWarnings({"Convert2MethodRef", "unused", "FutureReturnValueIgnored"})
    private void simpleAsyncQueryExecution() throws Exception {
        //::FigureB
        GraphQL graphQL = buildSchema();

        ExecutionInput executionInput = ExecutionInput.newExecutionInput().query("query { hero { name } }")
                .build();

        CompletableFuture<ExecutionResult> promise = graphQL.executeAsync(executionInput);

        promise.thenAccept(executionResult -> {
            // here you might send back the results as JSON over HTTP
            encodeResultToJsonAndSendResponse(executionResult);
        });

        promise.join();
        //::/FigureB
    }

    private GraphQL graphQL = buildSchema();
    private ExecutionInput executionInput = ExecutionInput.newExecutionInput().query("query { hero { name } }")
            .build();

    private void equivalentSerialAndAsyncQueryExecution() throws Exception {
        //::FigureC

        ExecutionResult executionResult = graphQL.execute(executionInput);

        // the above is equivalent to the following code (in long hand)

        CompletableFuture<ExecutionResult> promise = graphQL.executeAsync(executionInput);
        ExecutionResult executionResult2 = promise.join();