Example project fails to start - mysql

Question

Configuration File
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.example.demo.resolver.Mutation;
import com.example.demo.resolver.Query;
import graphql.GraphQL;
import graphql.schema.GraphQLSchema;
import static com.coxautodev.graphql.tools.SchemaParser.newParser;
#Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {
#Autowired
private static Query query;
#Autowired
private static Mutation mutation;
#Bean
public BCryptPasswordEncoder passwordEncoder() {
BCryptPasswordEncoder bCryptPasswordEncoder = new BCryptPasswordEncoder();
return bCryptPasswordEncoder;
}
#Autowired
public GraphQL graphQL() {
return GraphQL.newGraphQL(graphQLSchema())
.build();
}
public static GraphQLSchema graphQLSchema(){
return newParser()
.file("schema.graphqls")
.resolvers(query,mutation)
.build()
.makeExecutableSchema();
}
}
Schema.graphqls
type User {
uid: Long!
name: String!
password: String!
address: String!
mobile: Long!
}
type Query {
allUsers: [User]
}
type Mutation {
createUser(): User
}
schema {
query: Query
mutation: Mutation
}
Error
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webMvcConfig': Injection of autowired dependencies failed; nested exception is org.antlr.v4.runtime.misc.ParseCancellationException
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:372) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.web.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:154) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.web.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:134) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.boot.web.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:87) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:169) [spring-web-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5170) [catalina.jar:8.0.27]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:8.0.27]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) [catalina.jar:8.0.27]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) [catalina.jar:8.0.27]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_144]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]
Caused by: org.antlr.v4.runtime.misc.ParseCancellationException: null
at org.antlr.v4.runtime.BailErrorStrategy.recoverInline(BailErrorStrategy.java:90) ~[antlr4-runtime-4.5.1.jar:4.5.1]
at graphql.parser.antlr.GraphqlParser.name(GraphqlParser.java:1361) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.inputValueDefinition(GraphqlParser.java:3099) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.argumentsDefinition(GraphqlParser.java:3037) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.fieldDefinition(GraphqlParser.java:2965) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.objectTypeDefinition(GraphqlParser.java:2834) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.typeDefinition(GraphqlParser.java:2654) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.typeSystemDefinition(GraphqlParser.java:2437) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.definition(GraphqlParser.java:250) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.document(GraphqlParser.java:166) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.Parser.parseDocument(Parser.java:29) ~[graphql-java-3.0.0.jar:na]
at com.coxautodev.graphql.tools.SchemaParserBuilder.build(SchemaParserBuilder.kt:101) ~[graphql-java-tools-3.2.0.jar:na]
at com.example.demo.config.WebMvcConfig.graphQLSchema(WebMvcConfig.java:44) ~[classes/:0.0.1-SNAPSHOT]
at com.example.demo.config.WebMvcConfig.graphQL(WebMvcConfig.java:35) ~[classes/:0.0.1-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:701) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
... 26 common frames omitted
Caused by: org.antlr.v4.runtime.InputMismatchException: null
at org.antlr.v4.runtime.BailErrorStrategy.recoverInline(BailErrorStrategy.java:85) ~[antlr4-runtime-4.5.1.jar:4.5.1]
... 46 common frames omitted

Answer 1

As explained in the stack trace this is a parsing exception:
Caused by: org.antlr.v4.runtime.InputMismatchException: null => This is relative to an input
Caused by: org.antlr.v4.runtime.misc.ParseCancellationException: null
at org.antlr.v4.runtime.BailErrorStrategy.recoverInline(BailErrorStrategy.java:90) ~[antlr4-runtime-4.5.1.jar:4.5.1]
at graphql.parser.antlr.GraphqlParser.name(GraphqlParser.java:1361) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.inputValueDefinition(GraphqlParser.java:3099) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.argumentsDefinition(GraphqlParser.java:3037) ~[graphql-java-3.0.0.jar:na]
at graphql.parser.antlr.GraphqlParser.fieldDefinition(GraphqlParser.java:2965) ~[graphql-java-3.0.0.jar:na]=> The exception is raised while trying to parse the name of the input
So what's wrong ? In your Mutation you declared a field name createUser and you added brackets: In GraphQL when brackets are used, it means that you have at least on input / argument and the input must in the form <input name>: <input type>
Remove the brackets and it should works ;-)