Bean creation exception on FactoryBean type check

[cwt9562]

I got many warnings when I bootstrap my app with spring 4.1.8, mybatis 3.2.7 & mybatis-spring 1.2.2.

一月 05, 2016 3:00:13 下午 org.springframework.beans.factory.support.DefaultListableBeanFactory getTypeForFactoryBean
警告: Bean creation exception on FactoryBean type check: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fileAttributeMapper' defined in file [E:\ELearning\DEV\Code\Java\common-center\resource-center\resource-center-service\target\classes\com\netdragon\resource\center\transform\dao\FileAttributeMapper.class]: Cannot resolve reference to bean 'simpleSqlSessionFactoryBean' while setting bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'simpleSqlSessionFactoryBean': Requested bean is currently in creation: Is there an unresolvable circular reference?

These are two mapperScannerConfigurers and two sqlSessionFactoryBeans.

[harawata]

You need to use sqlSessionFactoryBeanName instead of sqlSessionFactory.
See the documentation for a longer explanation.

Please post the config details if it does not solve your problem.

[cwt9562]

My config:

@Configuration
public class MapperScannerConfig {

    @Bean(name = "mapperScannerConfigurer")
    public MapperScannerConfigurer mapperScannerConfigurer() throws Exception {
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setMarkerInterface(BaseMapper.class);
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("sqlSessionFactoryBean");
        mapperScannerConfigurer.setBasePackage("com.netdragon.resource.center");
        return mapperScannerConfigurer;
    }

    @Bean(name = "simpleMapperScannerConfigurer")
    public MapperScannerConfigurer simpleMapperScannerConfigurer() throws Exception {
        MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
        mapperScannerConfigurer.setMarkerInterface(SimpleBaseMapper.class);
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("simpleSqlSessionFactoryBean");
        mapperScannerConfigurer.setBasePackage("com.netdragon.resource.center");
        return mapperScannerConfigurer;
    }

}

[gariem]

You may need to use @MapperScan("org.mybatis.spring.sample.mapper") instead, then you can @autowire a javax.sql.DataSource object and use it to setup your SqlSessionFactoryBean:

@Configuration
@MapperScan(basePackages = "com.yourdomain.yourapp.persistence", sessionFactoryRef = "sqlSessionFactory")

public class ScannerConfig{

@Autowired
DataSource dataSource;

    @Bean(name = "sqlSessionFactory")
    public SqlSessionFactory sqlSessionFactory() {
        SqlSessionFactoryBean sessionFactory = new SqlSessionFactoryBean();
        sessionFactory.setDataSource(dataSource);
        sessionFactory.setTypeAliasesPackage("com.yourdomain.yourapp.domain");
        SqlSessionFactory sqlSessionFactory = null;
        try {
            sqlSessionFactory = sessionFactory.getObject();
        } catch (Exception e) {
            LOGGER.error("Error creating sqlSessionFactory", e);
        }
        return sqlSessionFactory;
    }
}

PD: In order to @autowire the javax.sql.DatSource object you need to setup the spring.datasource.* properties in your application.yml file (if you're using spring-boot). In case you're not using spring-cloud, you can still do it manually this way (you will need to somehow provide the configuration parameters: url, user, password and driverClassName) :

    @Bean
    public DataSource dataSource(){
        DataSourceBuilder factory = DataSourceBuilder
                .create()
                .driverClassName(driverClassName)
                .url(url)
                .username(username)
                .password(password);
        return factory.build();
    }

You will then need to change the dataSource reference in the sqlSessionFactory method to the dataSource() method annotated with the @bean annotation.

PD2: If then you plan to add spring-cloud-config-client, you're likely to have other problems because the @MapperScan is actually a BeanDefinitionRegistryPostProcessor and gets instatiated before the BeanFacoryPostProcessor responsible for enabling properties placeholders. Thus, you're not going to be able to autowire a datasource object in that case.

[passionlim]

1.2.4 release may solve this problem.

https://github.com/mybatis/spring/issues?q=milestone%3A1.2.4
#59