Can not register extended scalars.

[jaggerwang]

When using JSON scalar type from (graphql-java-extended-scalars)[https://github.com/graphql-java/graphql-java-extended-scalars], I got the following error.

Caused by: com.coxautodev.graphql.tools.SchemaClassScannerError: Unable to match type definition (NonNullType{type=TypeName{name='JSON'}}) with java type (class net.jaggerwang.sbip.entity.FileEntity$Meta): No TypeDefinition for type name JSON
        at com.coxautodev.graphql.tools.TypeClassMatcher.error(TypeClassMatcher.kt:22) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.TypeClassMatcher.match(TypeClassMatcher.kt:91) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.TypeClassMatcher.match$default(TypeClassMatcher.kt:32) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.TypeClassMatcher.match(TypeClassMatcher.kt:75) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.TypeClassMatcher.match(TypeClassMatcher.kt:28) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.SchemaClassScanner.scanResolverInfoForPotentialMatches(SchemaClassScanner.kt:268) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.SchemaClassScanner.scanQueueItemForPotentialMatches(SchemaClassScanner.kt:251) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.SchemaClassScanner.scanQueue(SchemaClassScanner.kt:103) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.SchemaClassScanner.scanForClasses(SchemaClassScanner.kt:81) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.SchemaParserBuilder.scan(SchemaParserBuilder.kt:169) ~[graphql-java-tools-5.7.1.jar:na]
        at com.coxautodev.graphql.tools.SchemaParserBuilder.build(SchemaParserBuilder.kt:210) ~[graphql-java-tools-5.7.1.jar:na]
        at graphql.kickstart.tools.boot.GraphQLJavaToolsAutoConfiguration.schemaParser(GraphQLJavaToolsAutoConfiguration.java:115) ~[graphql-kickstart-spring-boot-autoconfigure-tools-6.0.0.jar:na]
        at graphql.kickstart.tools.boot.GraphQLJavaToolsAutoConfiguration$$EnhancerBySpringCGLIB$$a7ca3dd0.CGLIB$schemaParser$3(<generated>) ~[graphql-kickstart-spring-boot-autoconfigure-tools-6.0.0.jar:na]
        at graphql.kickstart.tools.boot.GraphQLJavaToolsAutoConfiguration$$EnhancerBySpringCGLIB$$a7ca3dd0$$FastClassBySpringCGLIB$$943c8c05.invoke(<generated>) ~[graphql-kickstart-spring-boot-autoconfigure-tools-6.0.0.jar:na]
        at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) ~[spring-core-5.2.1.RELEASE.jar:5.2.1.RELEASE]
        at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) ~[spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
        at graphql.kickstart.tools.boot.GraphQLJavaToolsAutoConfiguration$$EnhancerBySpringCGLIB$$a7ca3dd0.schemaParser(<generated>) ~[graphql-kickstart-spring-boot-autoconfigure-tools-6.0.0.jar:na]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:na]
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
        at java.base/java.lang.reflect.Method.invoke(Method.java:566) ~[na:na]
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.1.RELEASE.jar:5.2.1.RELEASE]
        ... 142 common frames omitted

Here is my code.

...

type File {
    id: Long!
    userId: Long!
    region: String!
    bucket: String!
    path: String!
    meta: FileMeta!
    createdAt: String!
    updatedAt: String
    user: User!
    url: String!
    thumbs: JSON
}

type FileMeta {
    name: String!
    size: Long!
    type: String!
}

...

...

@Configuration
public class SbipConfig {
    ...

    @Bean
    public ObjectMapper objectMapper() {
        return new ObjectMapper().registerModule(new JavaTimeModule())
                .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
    }

    @Bean
    public SchemaParserOptions schemaParserOptions() {
        return SchemaParserOptions.newOptions()
                .objectMapperProvider(fieldDefinition -> objectMapper()).build();
    }

    @Bean
    public GraphQLScalarType jsonType() {
        return ExtendedScalars.Json;
    }

    @Bean
    public GraphQLScalarType dateTimeType() {
        return ExtendedScalars.DateTime;
    }

    @Bean
    public GraphQLScalarType urlType() {
        return ExtendedScalars.Url;
    }
}

...

@Component
public class FileResolver extends BaseResolver implements GraphQLResolver<FileEntity> {
    @Value("${storage.local.url-base}")
    private String urlBase;

    public UserEntity user(FileEntity fileEntity) {
        return userUsecases.info(fileEntity.getUserId());
    }

    public String url(FileEntity fileEntity) {
        if (fileEntity.getRegion() == FileEntity.Region.LOCAL) {
            return Paths.get(urlBase, fileEntity.getBucket(), fileEntity.getPath()).toString();
        } else {
            return "";
        }
    }

    public Map<FileEntity.ThumbType, String> thumbs(FileEntity fileEntity) {
        if (fileEntity.getMeta().getType().startsWith("image/")) {
            var thumbs = new HashMap<FileEntity.ThumbType, String>();
            var u = url(fileEntity);
            thumbs.put(FileEntity.ThumbType.SMALL,
                    String.format("%s?process=%s", u, "thumb-small"));
            thumbs.put(FileEntity.ThumbType.MIDDLE,
                    String.format("%s?process=%s", u, "thumb-middle"));
            thumbs.put(FileEntity.ThumbType.LARGE,
                    String.format("%s?process=%s", u, "thumb-large"));
            thumbs.put(FileEntity.ThumbType.HUGE, String.format("%s?process=%s", u, "thumb-huge"));
            return thumbs;
        } else {
            return null;
        }
    }
}

<?xml version="1.0" encoding="UTF-8" ?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.2.1.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	<groupId>net.jaggerwang</groupId>
	<artifactId>spring-boot-in-practice</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>Sbip</name>
	<description>Spring boot in practice</description>

	<properties>
		<java.version>11</java.version>
		<start-class>net.jaggerwang.sbip.SbipApplication</start-class>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-mongodb</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.session</groupId>
			<artifactId>spring-session-data-redis</artifactId>
		</dependency>

		<dependency>
			<groupId>com.graphql-java-kickstart</groupId>
			<artifactId>graphql-spring-boot-starter</artifactId>
			<version>6.0.0</version>
		</dependency>
		<dependency>
			<groupId>com.graphql-java-kickstart</groupId>
			<artifactId>graphiql-spring-boot-starter</artifactId>
			<version>6.0.0</version>
		</dependency>
		<dependency>
			<groupId>com.graphql-java-kickstart</groupId>
			<artifactId>voyager-spring-boot-starter</artifactId>
			<version>6.0.0</version>
		</dependency>
		<dependency>
			<groupId>com.graphql-java</groupId>
			<artifactId>graphql-java-extended-scalars</artifactId>
			<version>1.0.1</version>
		</dependency>


		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.flywaydb</groupId>
			<artifactId>flyway-core</artifactId>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-pool2</artifactId>
		</dependency>
		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>28.1-jre</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>com.graphql-java-kickstart</groupId>
			<artifactId>graphql-spring-boot-starter-test</artifactId>
			<version>6.0.0</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>com.h2database</groupId>
			<artifactId>h2</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

[jaggerwang]

Repository: https://github.com/jaggerwang/spring-boot-in-practice

[oliemansm]

Have you added scalar JSON to your schema too? Don't see it mentioned here.

[jaggerwang]

I'm not using this library any more, but directly use GraphQL Java Spring. Thanks!