Getting error while connecting to jpa using micronaut-data-hibernate-jpa library - jpa

Question

I want to use JPA for micronaut. For that I am using io.micronaut.data:micronaut-data-hibernate-jpa:1.0.0.M1 library. Whenever I run my application and hit the endpoint to get the data, I get the following error:
{
message: "Internal Server Error: No backing RepositoryOperations configured for repository. Check your configuration and try again"
}
I tried looking up for errors but I couldn't find one. Attaching my files here. Please help.
build.gradle
plugins {
id "net.ltgt.apt-eclipse" version "0.21"
id "com.github.johnrengelman.shadow" version "5.0.0"
id "application"
}
version "0.1"
group "micronaut.test"
repositories {
mavenCentral()
maven { url "https://jcenter.bintray.com" }
}
configurations {
// for dependencies that are needed for development only
developmentOnly
}
dependencies {
annotationProcessor platform("io.micronaut:micronaut-bom:$micronautVersion")
annotationProcessor "io.micronaut:micronaut-inject-java"
annotationProcessor "io.micronaut:micronaut-validation"
annotationProcessor "org.projectlombok:lombok:1.16.20"
annotationProcessor 'io.micronaut.data:micronaut-data-processor:1.0.0.M1'
implementation platform("io.micronaut:micronaut-bom:$micronautVersion")
compile 'io.micronaut.data:micronaut-data-hibernate-jpa:1.0.0.M1'
implementation "io.micronaut:micronaut-inject"
implementation "io.micronaut:micronaut-validation"
implementation "io.micronaut:micronaut-runtime"
implementation "io.micronaut:micronaut-http-server-netty"
implementation "io.micronaut:micronaut-http-client"
implementation 'nl.topicus:spanner-jdbc:1.1.5'
runtimeOnly "ch.qos.logback:logback-classic:1.2.3"
testAnnotationProcessor platform("io.micronaut:micronaut-bom:$micronautVersion")
testAnnotationProcessor "io.micronaut:micronaut-inject-java"
testImplementation "org.junit.jupiter:junit-jupiter-api"
testCompile "org.junit.jupiter:junit-jupiter-engine:5.1.0"
testImplementation "io.micronaut.test:micronaut-test-junit5"
testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine"
}
test.classpath += configurations.developmentOnly
mainClassName = "micronaut.test.Application"
// use JUnit 5 platform
test {
useJUnitPlatform()
}
tasks.withType(JavaCompile){
options.encoding = "UTF-8"
options.compilerArgs.add('-parameters')
}
shadowJar {
mergeServiceFiles()
}
run.classpath += configurations.developmentOnly
run.jvmArgs('-noverify', '-XX:TieredStopAtLevel=1', '-Dcom.sun.management.jmxremote')
Repository:
package micronaut.test.repo;
import io.micronaut.data.annotation.Repository;
import io.micronaut.data.repository.CrudRepository;
import micronaut.test.entity.Partner;
#Repository
public interface PartnerRepository extends CrudRepository<Partner,Integer> {
}
Service:
package micronaut.test.service;
import micronaut.test.entity.Partner;
import micronaut.test.repo.PartnerRepository;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.util.List;
#Singleton
public class SpannerService {
private PartnerRepository partnerRepository;
#Inject
public SpannerService(PartnerRepository partnerRepository) {
this.partnerRepository = partnerRepository;
}
public List<Partner> getPartners() {
return (List<Partner>) partnerRepository.findAll();
}
}
Controller:
package micronaut.test.controller;
import io.micronaut.http.MediaType;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;
import io.micronaut.http.annotation.Produces;
import micronaut.test.entity.Partner;
import micronaut.test.service.SpannerService;
import javax.inject.Inject;
import java.util.List;
#Controller("/micronaut")
public class MainController {
private SpannerService spannerService;
#Inject
public MainController(SpannerService spannerService) {
this.spannerService = spannerService;
}
#Get("/data")
#Produces(MediaType.APPLICATION_JSON)
public List<Partner> getPartners() {
return spannerService.getPartners();
}
}
stacktrace:
io.micronaut.context.exceptions.ConfigurationException: No backing RepositoryOperations configured for repository. Check your configuration and try again
at io.micronaut.data.intercept.DataIntroductionAdvice.findInterceptor(DataIntroductionAdvice.java:108)
at io.micronaut.data.intercept.DataIntroductionAdvice.intercept(DataIntroductionAdvice.java:76)
at io.micronaut.aop.MethodInterceptor.intercept(MethodInterceptor.java:40)
at io.micronaut.aop.chain.InterceptorChain.proceed(InterceptorChain.java:150)
at micronaut.test.repo.PartnerRepository$Intercepted.findAll(Unknown Source)
at micronaut.test.service.SpannerService.getPartners(SpannerService.java:22)
at micronaut.test.controller.MainController.getPartners(MainController.java:32)
at micronaut.test.controller.$MainControllerDefinition$$exec2.invokeInternal(Unknown Source)
at io.micronaut.context.AbstractExecutableMethod.invoke(AbstractExecutableMethod.java:144)
at io.micronaut.context.DefaultBeanContext$BeanExecutionHandle.invoke(DefaultBeanContext.java:2792)
at io.micronaut.web.router.AbstractRouteMatch.execute(AbstractRouteMatch.java:235)
at io.micronaut.web.router.RouteMatch.execute(RouteMatch.java:122)
at io.micronaut.http.server.netty.RoutingInBoundHandler.lambda$buildResultEmitter$19(RoutingInBoundHandler.java:1408)
at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:71)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.internal.operators.flowable.FlowableMap.subscribeActual(FlowableMap.java:37)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.internal.operators.flowable.FlowableSwitchIfEmpty.subscribeActual(FlowableSwitchIfEmpty.java:32)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14868)
at io.micronaut.http.context.ServerRequestTracingPublisher.lambda$subscribe$0(ServerRequestTracingPublisher.java:52)
at io.micronaut.http.context.ServerRequestContext.with(ServerRequestContext.java:52)
at io.micronaut.http.context.ServerRequestTracingPublisher.subscribe(ServerRequestTracingPublisher.java:52)
at io.reactivex.internal.operators.flowable.FlowableFromPublisher.subscribeActual(FlowableFromPublisher.java:29)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.micronaut.reactive.rxjava2.RxInstrumentedFlowable.subscribeActual(RxInstrumentedFlowable.java:68)
at io.reactivex.Flowable.subscribe(Flowable.java:14918)
at io.reactivex.Flowable.subscribe(Flowable.java:14865)
at io.reactivex.internal.operators.flowable.FlowableSubscribeOn$SubscribeOnSubscriber.run(FlowableSubscribeOn.java:82)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker$BooleanRunnable.run(ExecutorScheduler.java:288)
at io.reactivex.internal.schedulers.ExecutorScheduler$ExecutorWorker.run(ExecutorScheduler.java:253)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: io.micronaut.context.exceptions.NoSuchBeanException: No bean of type [io.micronaut.data.operations.RepositoryOperations] exists. Make sure the bean is not disabled by bean requirements (enable trace logging for 'io.micronaut.context.condition' to check) and if the bean is enabled then ensure the class is declared a bean and annotation processing is enabled (for Java and Kotlin the 'micronaut-inject-java' dependency should be configured as an annotation processor).
at io.micronaut.context.DefaultBeanContext.getBeanInternal(DefaultBeanContext.java:1903)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:582)
at io.micronaut.data.intercept.DataIntroductionAdvice.findInterceptor(DataIntroductionAdvice.java:105)
... 43 common frames omitted

Answer 1

Micronaut currently supports only Tomcat JDBC, Apache DBCP2 and Hikari data sources providers out of the box (see https://micronaut-projects.github.io/micronaut-sql/latest/guide/#jdbc).
You can add this line into your build.gradle which adds Tomcat JDBC Data Source provider implementation into your project:
runtime "io.micronaut.configuration:micronaut-jdbc-tomcat"
Or you can choose another implementations like Apache DBCP2:
runtime "io.micronaut.configuration:micronaut-jdbc-dbcp"
Or Hikari:
runtime "io.micronaut.configuration:micronaut-jdbc-hikari"
For nl.topicus:spanner-jdbc data source provider you have to implement your own DatasourceFactory and DatasourceConfiguration for Micronaut because there is no one yet.
You can inspire your self in io.micronaut.configuration:micronaut-jdbc-tomcat. Sources are here: https://github.com/micronaut-projects/micronaut-sql/tree/master/jdbc-tomcat/src/main/java/io/micronaut/configuration/jdbc/tomcat
For example DatasourceFactory can then look like this:
#Factory
public class DatasourceFactory implements AutoCloseable {
private static final Logger LOG = LoggerFactory.getLogger(DatasourceFactory.class);
private List<nl.topicus.jdbc.CloudSpannerDataSource> dataSources = new ArrayList<>(2);
private final DataSourceResolver dataSourceResolver;
/**
* Default constructor.
* #param dataSourceResolver The data source resolver
*/
public DatasourceFactory(#Nullable DataSourceResolver dataSourceResolver) {
this.dataSourceResolver = dataSourceResolver == null ? DataSourceResolver.DEFAULT : dataSourceResolver;
}
/**
* #param datasourceConfiguration A {#link DatasourceConfiguration}
* #return An Apache Tomcat {#link DataSource}
*/
#Context
#EachBean(DatasourceConfiguration.class)
public DataSource dataSource(DatasourceConfiguration datasourceConfiguration) {
nl.topicus.jdbc.CloudSpannerDataSource ds = new nl.topicus.jdbc.CloudSpannerDataSource();
ds.setJdbcUrl(datasourceConfiguration.getJdbcUrl());
...
dataSources.add(ds);
return ds;
}
#Override
#PreDestroy
public void close() {
for (nl.topicus.jdbc.CloudSpannerDataSource dataSource : dataSources) {
try {
dataSource.close();
} catch (Exception e) {
if (LOG.isWarnEnabled()) {
LOG.warn("Error closing data source [" + dataSource + "]: " + e.getMessage(), e);
}
}
}
}
}
Anyway you can still use Google Cloud Spanner DB with Data Source providers like Hikari and Apache DBCP2. For example:
runtime 'nl.topicus:spanner-jdbc:1.1.5'
runtime "io.micronaut.configuration:micronaut-jdbc-hikari"
The first line adds JDBC driver and the second line adds Data Source provider which will use the spanner-jdbc JDBC driver.

Answer 2

It is known that the Google Cloud Spanner uses another dialect than other databases for Hibernate ORM. I think that this dialect is pretty new. Take a look over this repository 1. Maybe it will be useful for you, not necessary for solving your current issue, but giving you some other perspective.