import graphql.GraphQL;
import graphql.schema.GraphQLSchema;
import graphql.schema.idl.RuntimeWiring;
import graphql.schema.idl.SchemaGenerator;
import graphql.schema.idl.SchemaParser;
import graphql.schema.idl.TypeDefinitionRegistry;
import io.micronaut.context.annotation.Bean;
import io.micronaut.context.annotation.Factory;
import io.micronaut.core.io.ResourceResolver;

import javax.inject.Singleton;
import java.io.BufferedReader;
import java.io.InputStreamReader;

@Factory (1)
public class GraphQLFactory {

    @Bean
    @Singleton
    public GraphQL graphQL(ResourceResolver resourceResolver, HelloDataFetcher helloDataFetcher) { (2)

        SchemaParser schemaParser = new SchemaParser();
        SchemaGenerator schemaGenerator = new SchemaGenerator();

        // Parse the schema.
        TypeDefinitionRegistry typeRegistry = new TypeDefinitionRegistry();
        typeRegistry.merge(schemaParser.parse(new BufferedReader(new InputStreamReader(
                resourceResolver.getResourceAsStream("classpath:schema.graphqls").get()))));

        // Create the runtime wiring.
        RuntimeWiring runtimeWiring = RuntimeWiring.newRuntimeWiring()
                .type("Query", typeWiring -> typeWiring
                        .dataFetcher("hello", helloDataFetcher))
                .build();

        // Create the executable schema.
        GraphQLSchema graphQLSchema = schemaGenerator.makeExecutableSchema(typeRegistry, runtimeWiring);

        // Return the GraphQL bean.
        return GraphQL.newGraphQL(graphQLSchema).build();
    }
}

import graphql.GraphQL
import graphql.schema.idl.RuntimeWiring
import graphql.schema.idl.SchemaGenerator
import graphql.schema.idl.SchemaParser
import graphql.schema.idl.TypeDefinitionRegistry
import groovy.transform.CompileStatic
import io.micronaut.context.annotation.Bean
import io.micronaut.context.annotation.Factory
import io.micronaut.core.io.ResourceResolver
import javax.inject.Singleton

@Factory (1)
@CompileStatic
class GraphQLFactory {

    @Bean
    @Singleton
    GraphQL graphQL(ResourceResolver resourceResolver, HelloDataFetcher helloDataFetcher) { (2)

        def schemaParser = new SchemaParser()
        def schemaGenerator = new SchemaGenerator()

        // Parse the schema.
        def typeRegistry = new TypeDefinitionRegistry()
        typeRegistry.merge(schemaParser.parse(new BufferedReader(new InputStreamReader(
                resourceResolver.getResourceAsStream("classpath:schema.graphqls").get()))))

        // Create the runtime wiring.
        def runtimeWiring = RuntimeWiring.newRuntimeWiring()
                .type("Query", { typeWiring -> typeWiring
                        .dataFetcher("hello", helloDataFetcher) })
                .build()

        // Create the executable schema.
        def graphQLSchema = schemaGenerator.makeExecutableSchema(typeRegistry, runtimeWiring)

        // Return the GraphQL bean.
        return GraphQL.newGraphQL(graphQLSchema).build()
    }
}

import graphql.GraphQL
import graphql.schema.idl.RuntimeWiring
import graphql.schema.idl.SchemaGenerator
import graphql.schema.idl.SchemaParser
import graphql.schema.idl.TypeDefinitionRegistry
import io.micronaut.context.annotation.Bean
import io.micronaut.context.annotation.Factory
import io.micronaut.core.io.ResourceResolver
import java.io.BufferedReader
import java.io.InputStreamReader
import javax.inject.Singleton

@Factory (1)
class GraphQLFactory {

    @Bean
    @Singleton
    fun graphQL(resourceResolver: ResourceResolver, helloDataFetcher: HelloDataFetcher): GraphQL { (2)

        val schemaParser = SchemaParser()
        val schemaGenerator = SchemaGenerator()

        // Parse the schema.
        val typeRegistry = TypeDefinitionRegistry();
        typeRegistry.merge(schemaParser.parse(BufferedReader(InputStreamReader(
                resourceResolver.getResourceAsStream("classpath:schema.graphqls").get()))))

        // Create the runtime wiring.
        val runtimeWiring = RuntimeWiring.newRuntimeWiring()
                .type("Query") { typeWiring -> typeWiring
                        .dataFetcher("hello", helloDataFetcher) }
                .build()

        // Create the executable schema.
        val graphQLSchema = schemaGenerator.makeExecutableSchema(typeRegistry, runtimeWiring)

        // Return the GraphQL bean.
        return GraphQL.newGraphQL(graphQLSchema).build()
    }
}