小贝子编程

使用@Repository微aut数据注释进行bean实例化的问题



我正在接近Micronaut框架来创建一个与数据库交互的程序。我是gradle项目配置等的新手，所以这可能是一个与此相关的问题。

我把我的项目分为两个模块:main(Application类所在的地方)和masterdata(所有项目所在的地方)

在masterdata"模块:

  • 一个带有"/test"方法返回一个字符串。
package core.masterdata.module.controllers;

import core.masterdata.module.entities.Person;
import core.masterdata.module.repositories.PersonRepository;
import core.masterdata.module.services.PersonService;
import io.micronaut.core.version.annotation.Version;
import io.micronaut.http.annotation.Controller;
import io.micronaut.http.annotation.Get;
import jakarta.inject.Inject;

import java.util.Optional;

import static core.masterdata.module.constants.EntitiesConstants.BASE_URL;

@Controller(BASE_URL + "/person/")
@Version("1")
public class PersonController {

@Inject
PersonService personService;

@Inject
PersonRepository personRepository;

@Get("test")
public String getPerson(Long pId){
return "test";
}
}
  • 一个存储库:
package core.masterdata.module.repositories;
import core.masterdata.module.entities.Person;
import io.micronaut.data.annotation.Repository;
import io.micronaut.data.repository.CrudRepository;
@Repository
public interface PersonRepository extends CrudRepository<**Person**, Long> {
}
  • 一个实体类:
package core.masterdata.module.entities;
import javax.persistence.*;
@Entity
@Table(name = "Person")
public class Person {
@Id
@GeneratedValue
@Column
private Long id;
@Column
private String name;
public Person(String name){
this.name = name;
}
public Person() {
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public void setId(Long id) {
this.id = id;
}
}

和另一个带有@Singleton注释的类(空)

项目构建和编译得很好，但是当我尝试调用API时，如果我在控制器或服务中注入存储库，我会得到一个运行时错误。

我在控制器类中也注入了@Singleton类，它在运行时不会引起问题。如果我在空类中注入存储库，然后在控制器中注入自身，我也会得到错误。

提前感谢你的帮助!

堆栈跟踪:

Unexpected error occurred: Error instantiating bean of type  [core.masterdata.module.controllers.PersonController]
Message: Multiple possible bean candidates found: [io.micronaut.aop.InterceptorRegistry, io.micronaut.aop.InterceptorRegistry]
Path Taken: new PersonController() --> PersonController.personRepository
io.micronaut.context.exceptions.BeanInstantiationException: Error instantiating bean of type  [core.masterdata.module.controllers.PersonController]
Message: Multiple possible bean candidates found: [io.micronaut.aop.InterceptorRegistry, io.micronaut.aop.InterceptorRegistry]
Path Taken: new PersonController() --> PersonController.personRepository
at io.micronaut.context.DefaultBeanContext.doCreateBean(DefaultBeanContext.java:2363)
at io.micronaut.context.DefaultBeanContext.createAndRegisterSingletonInternal(DefaultBeanContext.java:3281)
at io.micronaut.context.DefaultBeanContext.createAndRegisterSingleton(DefaultBeanContext.java:3267)
at io.micronaut.context.DefaultBeanContext.getBeanForDefinition(DefaultBeanContext.java:2820)
at io.micronaut.context.DefaultBeanContext.getBeanInternal(DefaultBeanContext.java:2782)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:1638)
at io.micronaut.context.AbstractInitializableBeanDefinition.resolveBean(AbstractInitializableBeanDefinition.java:2035)
at io.micronaut.context.AbstractInitializableBeanDefinition.getBeanForField(AbstractInitializableBeanDefinition.java:1579)
at core.masterdata.module.controllers.$PersonController$Definition.injectBean(Unknown Source)
at core.masterdata.module.controllers.$PersonController$Definition.build(Unknown Source)
at io.micronaut.context.DefaultBeanContext.doCreateBean(DefaultBeanContext.java:2336)
at io.micronaut.context.DefaultBeanContext.createAndRegisterSingletonInternal(DefaultBeanContext.java:3281)
at io.micronaut.context.DefaultBeanContext.createAndRegisterSingleton(DefaultBeanContext.java:3267)
at io.micronaut.context.DefaultBeanContext.getBeanForDefinition(DefaultBeanContext.java:2820)
at io.micronaut.context.DefaultBeanContext.access$100(DefaultBeanContext.java:151)
at io.micronaut.context.DefaultBeanContext$4.getTarget(DefaultBeanContext.java:540)
at io.micronaut.context.DefaultBeanContext$4.invoke(DefaultBeanContext.java:583)
at io.micronaut.web.router.AbstractRouteMatch.execute(AbstractRouteMatch.java:303)
at io.micronaut.web.router.RouteMatch.execute(RouteMatch.java:111)
at io.micronaut.http.context.ServerRequestContext.with(ServerRequestContext.java:103)
at io.micronaut.http.server.RouteExecutor.lambda$executeRoute$14(RouteExecutor.java:659)
at reactor.core.publisher.FluxDeferContextual.subscribe(FluxDeferContextual.java:49)
at reactor.core.publisher.Flux.subscribe(Flux.java:8469)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:426)
at io.micronaut.reactive.reactor.instrument.ReactorSubscriber.onNext(ReactorSubscriber.java:57)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2398)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:371)
at io.micronaut.reactive.reactor.instrument.ReactorSubscriber.onSubscribe(ReactorSubscriber.java:50)
at reactor.core.publisher.FluxJust.subscribe(FluxJust.java:68)
at reactor.core.publisher.Flux.subscribe(Flux.java:8469)
at io.micronaut.http.server.netty.RoutingInBoundHandler.handleRouteMatch(RoutingInBoundHandler.java:586)
at io.micronaut.http.server.netty.RoutingInBoundHandler.channelRead0(RoutingInBoundHandler.java:449)
at io.micronaut.http.server.netty.RoutingInBoundHandler.channelRead0(RoutingInBoundHandler.java:144)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:99)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:102)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.micronaut.http.netty.stream.HttpStreamsHandler.channelRead(HttpStreamsHandler.java:224)
at io.micronaut.http.netty.stream.HttpStreamsServerHandler.channelRead(HttpStreamsServerHandler.java:134)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
at io.netty.handler.codec.http.websocketx.extensions.WebSocketServerExtensionHandler.channelRead(WebSocketServerExtensionHandler.java:99)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
at io.netty.handler.codec.http.HttpServerKeepAliveHandler.channelRead(HttpServerKeepAliveHandler.java:64)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.flow.FlowControlHandler.dequeue(FlowControlHandler.java:200)
at io.netty.handler.flow.FlowControlHandler.channelRead(FlowControlHandler.java:162)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:327)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:299)
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: io.micronaut.context.exceptions.NonUniqueBeanException: Multiple possible bean candidates found: [io.micronaut.aop.InterceptorRegistry, io.micronaut.aop.InterceptorRegistry]
at io.micronaut.context.DefaultBeanContext.findConcreteCandidate(DefaultBeanContext.java:2429)
at io.micronaut.context.DefaultApplicationContext.findConcreteCandidate(DefaultApplicationContext.java:455)
at io.micronaut.context.DefaultBeanContext.lastChanceResolve(DefaultBeanContext.java:3253)
at io.micronaut.context.DefaultBeanContext.findConcreteCandidateNoCache(DefaultBeanContext.java:3140)
at io.micronaut.context.DefaultBeanContext.findConcreteCandidate(DefaultBeanContext.java:3054)
at io.micronaut.context.DefaultBeanContext.getBeanInternal(DefaultBeanContext.java:2750)
at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:888)
at io.micronaut.aop.chain.InterceptorChain.resolveInterceptors(InterceptorChain.java:205)
at io.micronaut.aop.chain.InterceptorChain.resolveIntroductionInterceptors(InterceptorChain.java:144)
at core.masterdata.module.repositories.PersonRepository$Intercepted.<init>(Unknown Source)
at core.masterdata.module.repositories.$PersonRepository$Intercepted$Definition.build(Unknown Source)
at io.micronaut.context.DefaultBeanContext.doCreateBean(DefaultBeanContext.java:2336)
... 97 common frames omitted

看起来你错误地配置了Gradle构建，并且在类路径上有多个micronaut-core依赖项。

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