Question

我知道在互联网上有很多解决同一问题的例子。但是我试图获得帮助的是架构方面的问题。

我有一个简单的spring项目，其中有一个配置类，我正在尝试配置两个数据源 （distDataSource，shipmentDataSource）。我为下面提到的两个数据源（ MyBatisDISTDataSource，MyBatisShipmentDataSource ）有两个单独的类。

这两个数据仓库分别工作正常，但是当我尝试一起执行它时，控制台上会出现异常。

控制台异常日志

线程“主”中的异常 org.springframework.beans.factory.UnsatisfiedDependencyException：创建名称为“ distDAOImpl”的bean时出错：不满意的依赖关系通过字段“ distMapper”表示；嵌套异常为 org.springframework.beans.factory.UnsatisfiedDependencyException：在文件中定义名称为“ distMapper”的bean时出错 [D：\ eclipse \ ShippingModule \ shipment-module-v2 \ CustEquip-CourierShipmentService-PickupSvc \ target \ classes \ com \ shipment \ mapper \ DistMapper.class]：通过bean属性表示的不满意依赖性 'sqlSessionFactory';嵌套异常为 org.springframework.beans.factory.NoUniqueBeanDefinitionException：否类型为“ org.apache.ibatis.session.SqlSessionFactory”的合格Bean 可用：预期的单个匹配bean，但发现2： distSqlSessionFactory，shipmentSqlSessionFactory位于 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:588）在 org.springframework.beans.factory.annotation.InjectionMetadata.inject（InjectionMetadata.java:88）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues（AutowiredAnnotationBeanPostProcessor.java:366）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1264）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:553）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:483）在 org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:197）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:761）在 org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:867）在 org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:543）在 org.springframework.context.annotation.AnnotationConfigApplicationContext。（AnnotationConfigApplicationContext.java:84）在 com.telus.shipment.app.starter.SchedulePickup.main（SchedulePickup.java:11）造成原因： org.springframework.beans.factory.UnsatisfiedDependencyException：在文件中定义名称为“ distMapper”的bean时出错 [D：\ eclipse \ ShippingModule \ shipment-module-v2 \ CustEquip-CourierShipmentService-PickupSvc \ target \ classes \ com \ shipment \ mapper \ DistMapper.class]：通过bean属性表示的不满意依赖性 'sqlSessionFactory';嵌套异常为 org.springframework.beans.factory.NoUniqueBeanDefinitionException：否类型为“ org.apache.ibatis.session.SqlSessionFactory”的合格Bean 可用：预期的单个匹配bean，但发现2： distSqlSessionFactory，shipmentSqlSessionFactory位于 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType（AbstractAutowireCapableBeanFactory.java:1357）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1249）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:553）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:483）在 org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:306）在 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）在 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:302）在 org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:202）在 org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate（DependencyDescriptor.java:208）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1138）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1066）在 org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor $ AutowiredFieldElement.inject（AutowiredAnnotationBeanPostProcessor.java:585） ... 14更多原因： org.springframework.beans.factory.NoUniqueBeanDefinitionException：否类型为“ org.apache.ibatis.session.SqlSessionFactory”的合格Bean 可用：预期的单个匹配bean，但发现2： distSqlSessionFactory，shipmentSqlSessionFactory位于 org.springframework.beans.factory.config.DependencyDescriptor.resolveNotUnique（DependencyDescriptor.java:173）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency（DefaultListableBeanFactory.java:1116）在 org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency（DefaultListableBeanFactory.java:1066）在 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType（AbstractAutowireCapableBeanFactory.java:1342） ...另外25个

配置类

@Component
@Configuration
@Profile("local")
public class EnvironmentConfigLocal implements EnvironmentConfig {

    @Autowired @Qualifier("DISTDataSource") private MyBatisDISTDataSource distDataSource;
    @Autowired @Qualifier("ShipmentDataSource") private MyBatisShipmentDataSource shipmentDataSource;

    @PostConstruct
    public void postConstruct() {
        System.out.println("Selected Profile : Local");
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer dataProperties(final Environment environment) {
        final PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
        final YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
        final SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher();
        matcher.addActiveProfiles(environment.getActiveProfiles());
        yaml.setDocumentMatchers(matcher);
        yaml.setResources(new ClassPathResource("application.yaml"));
        propertySourcesPlaceholderConfigurer.setProperties(yaml.getObject());
        return propertySourcesPlaceholderConfigurer;
    }

    @Bean
    public DataSourceTransactionManager distTransactionManager() throws SQLException {
        return new DataSourceTransactionManager(distDataSource);
    }

    @Bean
    public DataSourceTransactionManager shipmentTransactionManager() throws SQLException {
        return new DataSourceTransactionManager(shipmentDataSource);
    }

    @Bean
    @Override
    public SqlSessionFactory distSqlSessionFactory() throws Exception {
        SqlSessionFactoryBean distSessionFactory = new SqlSessionFactoryBean();
        distSessionFactory.setDataSource(distDataSource);
        return distSessionFactory.getObject();
    }

    @Bean
    @Override
    public SqlSessionFactory shipmentSqlSessionFactory() throws Exception {
        SqlSessionFactoryBean shipmentSessionFactory = new SqlSessionFactoryBean();
        shipmentSessionFactory.setDataSource(shipmentDataSource);
        return shipmentSessionFactory.getObject();
    }
}

MyBatisDISTDataSource

@Component
@Qualifier("DISTDataSource")
public class MyBatisDISTDataSource extends PooledDataSource {

    @Value("${dist.db.poolMaximumActiveConnections}") int poolMaximumActiveConnections;
    @Value("${dist.db.poolMaximumIdleConnections}") int poolMaximumIdleConnections;

    public MyBatisDISTDataSource(
            @Value("${dist.db.driver-class}") String driver, 
            @Value("${dist.db.url}") String url,
            @Value("${dist.db.user}") String username, 
            @Value("${dist.db.password}") String password) {
        super(driver, url, username, password);
        System.out.println("DIST DB Attr: \n\t" 
                        +driver+"\n\t"
                        +url+"\n\t"
                        +username+"\n\t"
                        +password+"\n\t");
    }

    @PostConstruct
    private void setDataSourceProperties() {
        this.setPoolMaximumActiveConnections(poolMaximumActiveConnections);
        this.setPoolMaximumIdleConnections(poolMaximumIdleConnections);
    }
}

MyBatisShipmentDataSource

@Component
@Qualifier("ShipmentDataSource")
public class MyBatisShipmentDataSource extends PooledDataSource {

    @Value("${shipment.db.poolMaximumActiveConnections}") int poolMaximumActiveConnections;
    @Value("${shipment.db.poolMaximumIdleConnections}") int poolMaximumIdleConnections;

    public MyBatisShipmentDataSource(
            @Value("${shipment.db.driver-class}") String driver, 
            @Value("${shipment.db.url}") String url,
            @Value("${shipment.db.user}") String username, 
            @Value("${shipment.db.password}") String password) {
        super(driver, url, username, password);
        System.out.println("Shipment DB Attr: \n\t" 
                        +driver+"\n\t"
                        +url+"\n\t"
                        +username+"\n\t"
                        +password+"\n\t");
    }

    @PostConstruct
    private void setDataSourceProperties() {
        this.setPoolMaximumActiveConnections(poolMaximumActiveConnections);
        this.setPoolMaximumIdleConnections(poolMaximumIdleConnections);
    }
}

DistMapper

@Mapper
@Component
public interface DistMapper {
    @Select({"select * "
            + "from CONTACT_ADDRESS CA, ADDRESS A"
            + "where CONTACTING_ID = '10001134' "
            + "and PROVINCE_CD ='ON' "
            + "and STREET_NUMBER = '15'"})
    @Results({@Result(column = "CONTACTING_ID", property = "contactingId", jdbcType = JdbcType.DECIMAL)})
    public List<OutletAddress> findAddressByOutletId();

}

ShipmentMapper

@Mapper
@Component
public interface ShipmentMapper {

    @Select({"select C.CONTACT_ID " 
            + "from SHIPMENT_EVENT_TRACKING SE, SHIPMENT S, CONTACT_ADDR CA, CONTACT C " 
            + "where SE.EVENT_CD = 'PICKUP' " 
            + "and SE.SHIPMENT_ID = s.shipment_id " 
            + "and S.SENDER_ADDR_ID = CA.CONTACT_ADDR_ID " 
            + "and CA.CONTACT_ID = c.contact_id " 
            + "and C.GROUP_CD = 'OT' " 
            + "and SE.EVENT_OCCURRED_IND = 'N' " 
            + "and S.CREATION_TS >= (select CURRENT_TIMESTAMP - interval '30' day from dual)" 
            + "and S.SCHEDULE_PICKUP_IND = 'Y'"})
    @Results({
        @Result(column = "CONTACT_ID", property = "contactId", jdbcType = JdbcType.DECIMAL)})
    public CopyOnWriteArrayList<EligibleShipment> findShipmentsByOutlet();
}

Answer 1

使用spring-mybatis，您可以register一对一地映射，也可以使用scanning映射器。

如果要手动注册映射器，请确保将正确的SqlSessionFactory传递给每个映射器。如果您今年春天不这样做，将尝试自动装配SqlSessionFactory，由于其中有两个，您将得到一个错误，即找不到单个bean。

如果使用扫描映射器，请为其指定参数，以便适当的映射器使用正确的SqlSessionFactory。一种方法是将应该使用不同DataSource的映射器放置到不同的包中。在这种情况下，您需要像这样创建两个MapperScannerConfigurer bean（假设映射器位于com.mycompany.myapp.distMappersPackage和com.mycompany.myapp.shipmentMappersPackage中）

@Bean
public MapperScannerConfigurer distMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setBasePackage("com.mycompany.myapp.distMappersPackage");
    configurer.setSqlSessionFactoryBeanName("distSqlSessionFactory");
    return configurer;
}

@Bean
public MapperScannerConfigurer shipmentMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setBasePackage("com.mycompany.myapp.shipmentMappersPackage");
    configurer.setSqlSessionFactoryBeanName("shipmentSqlSessionFactory");
    return configurer;
}

或者，您可以创建两个不同的注释，并在映射器上使用它们，如下所示：

@DistMapperMarker
public interface DistMapper {
   ...
}

@ShipmentMapperMarker
public interface ShipmentMapper {
   ...
}

在这种情况下，映射器可以放在一个包中，但是您可以在annotationClass上指定MapperScannerConfigurer：

@Bean
public MapperScannerConfigurer distMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setAnnotationClass(DistMapperMarker.class);
    configurer.setSqlSessionFactoryBeanName("distSqlSessionFactory");
    return configurer;
}

@Bean
public MapperScannerConfigurer shipmentMapperScannerConfigurer() throws Exception {
    MapperScannerConfigurer configurer = new MapperScannerConfigurer();
    configurer.setAnnotationClass(ShipmentMapperMarker.class);
    configurer.setSqlSessionFactoryBeanName("shipmentSqlSessionFactory");
    return configurer;
}

对于java base spring配置，您还可以尝试使用MapperScan并将参数指定为其属性。这将需要您将弹簧配置至少分为两类。我没有使用这种方法，所以不确定是否可以正常工作。

Answer 2

@Primary在SqlSessionFactory bean之一上解决了我的问题。

    @Bean
    @Primary
    @Override
    public SqlSessionFactory sqlSessionFactory2() throws Exception {
        SqlSessionFactoryBean sessionFactory2 = new SqlSessionFactoryBean();
        sessionFactory2.setDataSource(dataSource2);
        return sessionFactory2.getObject();
    }

org.springframework.beans.factory.NoUniqueBeanDefinitionException：没有类型为'org.apache.ibatis.session.SqlSessionFactory'的合格bean

2 个答案: