使用 micronaut-data-hibernate-jpa 库连接到 jpa 时出错
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【中文标题】使用 micronaut-data-hibernate-jpa 库连接到 jpa 时出错【英文标题】：Getting error while connecting to jpa using micronaut-data-hibernate-jpa library 【发布时间】：2020-01-10 22:00:14 【问题描述】：我想为 micronaut 使用 JPA。为此，我正在使用 io.micronaut.data:micronaut-data-hibernate-jpa:1.0.0.M1 库。每当我运行我的应用程序并点击端点以获取数据时，我都会收到以下错误：
message: "Internal Server Error: No backing RepositoryOperations configured for repository. Check your configuration and try again"
我尝试查找错误，但找不到。在这里附加我的文件。请帮忙。
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')
存储库：
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>
服务：
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();
控制器：
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();
堆栈跟踪：
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
【问题讨论】：
【参考方案1】：Micronaut 目前仅支持开箱即用的 Tomcat JDBC、Apache DBCP2 和 Hikari 数据源提供程序（请参阅https://micronaut-projects.github.io/micronaut-sql/latest/guide/#jdbc）。
您可以将此行添加到您的 build.gradle 中，这会将 Tomcat JDBC 数据源提供程序实现添加到您的项目中：
runtime "io.micronaut.configuration:micronaut-jdbc-tomcat"
或者您可以选择其他实现，例如 Apache DBCP2：
runtime "io.micronaut.configuration:micronaut-jdbc-dbcp"
或者光：
runtime "io.micronaut.configuration:micronaut-jdbc-hikari"
对于 nl.topicus:spanner-jdbc 数据源提供者，您必须为 Micronaut 实现自己的 DatasourceFactory 和 DatasourceConfiguration，因为目前还没有。
您可以在io.micronaut.configuration:micronaut-jdbc-tomcat 中激发自我。来源在这里：https://github.com/micronaut-projects/micronaut-sql/tree/master/jdbc-tomcat/src/main/java/io/micronaut/configuration/jdbc/tomcat
例如 DatasourceFactory 可以如下所示：
@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);
无论如何，您仍然可以将 Google Cloud Spanner DB 与 Hikari 和 Apache DBCP2 等数据源提供程序一起使用。例如：
runtime 'nl.topicus:spanner-jdbc:1.1.5'
runtime "io.micronaut.configuration:micronaut-jdbc-hikari"
第一行添加 JDBC 驱动程序，第二行添加将使用 spanner-jdbc JDBC 驱动程序的数据源提供程序。
【讨论】：
我已经有了这个：implementation 'nl.topicus:spanner-jdbc:1.1.5'，这是 cloud-spanner 的第三方 jdbc 驱动程序
我用其他信息更新了答案。很快，您需要以 Micronaut 方式实现的 DataSource 提供程序。例如，您可以将 nl.topicus:spanner-jdbc:1.1.5 JDBC 驱动程序与 Hikari 一起使用，或者为 Micronaut 实现我们自己的 DatasourceFactory，它将直接从 nl.topicus:spanner-jdbc:1.1.5 library 使用 CloudSpannerDataSource。
更不用说，如果你使用的是mysql，请在maven的gradle中包含mysql连接器的依赖【参考方案2】：
众所周知，Google Cloud Spanner 对于 Hibernate ORM 使用的方言不同于其他数据库。我认为这种方言很新。查看此存储库1。也许它对你有用，不是解决你当前的问题所必需的，而是给你一些其他的观点。
【讨论】：
嘿。谢谢您的帮助。好像方言还在开发中。我找不到要使用的方言版本，这会给我带来编译错误。知道我能不能找到方言版本吗？ 我已经在上面的帖子中发布了这个存储库链接：github.com/GoogleCloudPlatform/google-cloud-spanner-hibernate。据我所知，这是迄今为止唯一为 Cloud Spanner 开发的东西。以上是关于使用 micronaut-data-hibernate-jpa 库连接到 jpa 时出错的主要内容，如果未能解决你的问题，请参考以下文章
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