问题
I am trying to setup DynamoDB locally with Spring Boot. Initially I got the setup working and was able to write/save to DynamoDB via a repository. From that point I added more classes to build my application. Now when I try to start my application, I get the following exception:
org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'agentRepository' defined in null: Cannot register bean definition [Root bean: class [org.socialsignin.spring.data.dynamodb.repository.support.DynamoDBRepositoryFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] for bean 'agentRepository': There is already [Root bean: class [org.socialsignin.spring.data.dynamodb.repository.support.DynamoDBRepositoryFactoryBean]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] bound.
I have searched SO and internet extensively but there were no any useful solution to this. The error message is misleading as well.
My project is of the following hierarchy
ai.test.as
- as
- agent
- business
- intent
- exception
- Agent.java
- AgentDTO.java
- AgentRespository.java
- AgentController.java
- AgentService.java
- AgentServiceImpl.java
- config
- DynamoDBConfig.java
DynamoDBConfig.java
package ai.test.as.config;
import ai.test.as.agent.AgentRepository;
import ai.test.as.agent.intent.template.TemplateRepository;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDBClient;
import org.socialsignin.spring.data.dynamodb.repository.config.EnableDynamoDBRepositories;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@EnableDynamoDBRepositories(basePackageClasses = {AgentRepository.class})
public class DynamoDBConfig
{
@Value("${aws.dynamodb.endpoint}")
private String dynamoDBEndpoint;
@Value("${aws.auth.accesskey}")
private String awsAccessKey;
@Value("${aws.auth.secretkey}")
private String awsSecretKey;
@Bean
public AmazonDynamoDB amazonDynamoDB()
{
AmazonDynamoDB dynamoDB = new AmazonDynamoDBClient(getAwsCredentials());
dynamoDB.setEndpoint(dynamoDBEndpoint);
return dynamoDB;
}
@Bean
public AWSCredentials getAwsCredentials()
{
return new BasicAWSCredentials(awsAccessKey, awsSecretKey);
}
}
AgentRepository.java
package ai.test.as.agent;
import ai.test.as.agent.Agent;
import org.socialsignin.spring.data.dynamodb.repository.EnableScan;
import org.springframework.data.repository.CrudRepository;
@EnableScan
public interface AgentRepository extends CrudRepository<Agent, String>
{
}
AgentController.java (Where AgentRepository is used)
@RestController
@RequestMapping(value = "/v1/agents")
public class AgentController
{
@Autowired
private AgentRepository agentRepository;
@RequestMapping(value = "/test", method = RequestMethod.POST)
public void test()
{
Agent agent = new Agent();
agent.setAgentNumber("123456");
agent.setId(1);
agentRepository.save(agent);
}
}
Spring suggests the following:
> The bean 'agentRepository', defined in null, could not be registered. A bean with that name has already been defined in null and overriding is disabled
.
What does null
mean here? Is it because something wrong in my application config? Also how is it possible that it is already registered?
Please give me some pointers because I so confused about my next steps.
回答1:
Bean overriding has to be enabled since Spring Boot 2.1,
https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.1-Release-Notes
Bean Overriding
Bean overriding has been disabled by default to prevent a bean being accidentally overridden. If you are relying on overriding, you will need to set spring.main.allow-bean-definition-overriding to true.
Set
spring.main.allow-bean-definition-overriding=true
or yml,
spring:
main:
allow-bean-definition-overriding: true
to enable overriding again.
Edit,
Bean Overriding is based of the name of the bean not its type. e.g.
@Bean
public ClassA class(){
return new ClassA();
}
@Bean
public ClassB class(){
return new ClassB();
}
Will cause this error in > 2.1, by default bean names are taken from the method name. Renaming the method or adding the name
attribute to the Bean
annotation will be a valid fix.
来源:https://stackoverflow.com/questions/53723303/springboot-beandefinitionoverrideexception-invalid-bean-definition