问题
I have two entity manager configurations for two separate databases but when I try to auto-wire an entity manager in to configure my GraphQLExecutor bean I get an exception stating that there are two beans that match the criteria even though I've specified a unit name in the PersistenceContext.
Exception
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'graphQLExecutor': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'javax.persistence.EntityManager' available: expected single matching bean but found 2: org.springframework.orm.jpa.SharedEntityManagerCreator#0,org.springframework.orm.jpa.SharedEntityManagerCreator#1 at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:321) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.4.RELEASE.jar:1.5.4.RELEASE] at com.ogl.JpaDemoApplication.main(JpaDemoApplication.java:15) [classes/:na] Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'javax.persistence.EntityManager' available: expected single matching bean but found 2: org.springframework.orm.jpa.SharedEntityManagerCreator#0,org.springframework.orm.jpa.SharedEntityManagerCreator#1 at org.springframework.beans.factory.config.DependencyDescriptor.resolveNotUnique(DependencyDescriptor.java:173) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:518) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:496) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:627) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:169) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:318) ~[spring-context-4.3.9.RELEASE.jar:4.3.9.RELEASE] ... 17 common frames omitted
Entity Manager 1
package com.ogl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
@Configuration
@EnableJpaRepositories(basePackages = "com.ogl.system", entityManagerFactoryRef = "companyEntityManagerFactory", transactionManagerRef = "companyTransactionManager")
public class SystemJpaConfig {
private final Environment environment;
@Autowired
public SystemJpaConfig(Environment environment) {
this.environment = environment;
}
@Bean("systemEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean systemEntityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setPackagesToScan("com.ogl.system");
entityManagerFactoryBean.setPersistenceUnitName("system");
entityManagerFactoryBean.setDataSource(systemDataSource());
HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setDatabase(Database.POSTGRESQL);
adapter.setShowSql(true);
adapter.setGenerateDdl(false);
entityManagerFactoryBean.setJpaVendorAdapter(adapter);
return entityManagerFactoryBean;
}
@Bean
DataSource systemDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getProperty("p4.datasource.driver"));
dataSource.setUrl(environment.getProperty("p4.system.url"));
dataSource.setUsername(environment.getProperty("p4.system.user"));
dataSource.setPassword(environment.getProperty("p4.system.password"));
return dataSource;
}
@Bean
public PlatformTransactionManager systemTransactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory((systemEntityManagerFactory().getObject()));
return transactionManager;
}
}
Entity Manager 2
package com.ogl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
@Configuration
@EnableJpaRepositories(basePackages = "com.ogl.company", entityManagerFactoryRef = "companyEntityManagerFactory", transactionManagerRef = "companyTransactionManager")
public class CompanyJpaConfig {
private final Environment environment;
@Autowired
public CompanyJpaConfig(Environment environment) {
this.environment = environment;
}
@Primary
@Bean("companyEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean companyEntityManagerFactory() {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setPackagesToScan("com.ogl.company");
entityManagerFactoryBean.setPersistenceUnitName("company");
entityManagerFactoryBean.setDataSource(companyDataSource());
HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setDatabase(Database.POSTGRESQL);
adapter.setShowSql(true);
adapter.setGenerateDdl(false);
entityManagerFactoryBean.setJpaVendorAdapter(adapter);
return entityManagerFactoryBean;
}
@Bean
DataSource companyDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getProperty("p4.datasource.driver"));
dataSource.setUrl(environment.getProperty("p4.company.url"));
dataSource.setUsername(environment.getProperty("p4.company.user"));
dataSource.setPassword(environment.getProperty("p4.company.password"));
return dataSource;
}
@Primary
@Bean
public PlatformTransactionManager companyTransactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory((companyEntityManagerFactory().getObject()));
return transactionManager;
}
}
Injection
package com.ogl;
import org.crygier.graphql.GraphQLExecutor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Configuration
@ComponentScan
public class GraphQLJpaConfig {
@PersistenceContext(unitName = "company")
private EntityManager entityManager;
@Bean
public GraphQLExecutor graphQLExecutor() {
return new GraphQLExecutor(entityManager);
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ogl</groupId>
<artifactId>jpa-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>jpa-demo</name>
<description>Demo project for JPA</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.graphql-java</groupId>
<artifactId>graphql-java</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>com.crygier</groupId>
<artifactId>graphql-jpa</artifactId>
<version>0.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
回答1:
You have defined two entitymanager. Now you have to tell spring which one should injected. For this you can use the @Qualifier
Annotation:
@PersistenceContext(unitName = "company")
@Qualifier(<Name of the entitimanager you want to use>)
private EntityManager entityManager;
回答2:
Can you try giving the annotation @Primary over entityManagerFactory and transactionManager in one of the configuration files once?
回答3:
Found a solution by marking the class I was injecting with the EntityManager with @Component and then auto-wiring that class into the class that uses the GraphQLExecutor:
New class marked @Component
package p4;
import org.crygier.graphql.GraphQLExecutor;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Component
public class CompanyGraphQLComponent {
@PersistenceContext(unitName = "company")
private EntityManager entityManager;
public GraphQLExecutor graphQLExecutor() {
return new GraphQLExecutor(entityManager);
}
}
Class auto-wiring CompanyGraphQLComponent
package p4.rest.controllers;
import core_services.persistence.CompanyContextHolder;
import core_services.records.system.Company;
import graphql.ExecutionResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import p4.CompanyGraphQLComponent;
import p4.records.GraphQLQuery;
@RestController
public class GraphQLController {
@Autowired
private CompanyGraphQLComponent companyGraphQLComponent;
@RequestMapping(value = "/graphql", consumes = MediaType.APPLICATION_JSON_VALUE)
public ExecutionResult postJson(@RequestBody GraphQLQuery graphQLQuery) {
return companyGraphQLComponent.graphQLExecutor().execute(graphQLQuery.getQuery(), graphQLQuery.getVariables());
}
}
回答4:
I have two datasources, marking one as primary solved the issue
来源:https://stackoverflow.com/questions/44970133/no-qualifying-bean-of-type-javax-persistence-entitymanager-available-expected