Spring Boot中的多个数据源和模式创建

Question

我正在使用Spring Boot.我终于设法设置了两个数据源,但现在我面临另一个问题.

1. 有两个数据源spring.jpa.hibernate.ddl-auto=create似乎停止在我的春季启动应用程序spring.jpa.generate-ddl=true中工作,现在只做工作

2. 我无法为每个数据源选择自动创建策略.我更愿意为数据源1创建模式,只使用第二个数据库中创建的模式和数据源2.

任何机构都知道如何解决这些问题？注意我不想在可能的情况下完全丢弃自动配置.我甚至不知道,如果hibernate能够在一个持久性单元中初始化模式.

application.properties

spring.datasource-internal.url=jdbc:hsqldb:mem:testdb
spring.datasource-internal.username=sa
spring.datasource-internal.password=sa
spring.datasource-internal.driver-class-name=org.hsqldb.jdbcDriver
spring.datasource-internal.jpa.database-platform=org.hibernate.dialect.HSQLDialect

spring.datasource-external.url=jdbc:hsqldb:mem:testexternal
spring.datasource-external.username=sa
spring.datasource-external.password=sa
spring.datasource-external.driver-class-name=org.hsqldb.jdbcDriver
spring.datasource-external.jpa.database-platform=org.hibernate.dialect.HSQLDialect

flyway.enabled=false
spring.jpa.hibernate.ddl-auto=create
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true

DBInternalConfig

    @Configuration
    @EnableTransactionManagement
    @EnableJpaRepositories(basePackages = "cz.data.internal",
            entityManagerFactoryRef = "internalEntityManagerFactory",
            transactionManagerRef = "internalTransactionManager")
    public class DBConfigInternal {


        public static final String INTERNAL = "internal";

        @Bean(name = "internalDataSource")
        @Primary
        @ConfigurationProperties(prefix = "spring.datasource-internal")
        public DataSource internalDataSource() {
            return DataSourceBuilder.create().build();
        }

        @Bean(name = "internalEntityManagerFactory")
        @Primary
        public LocalContainerEntityManagerFactoryBean internalEntityManagerFactory(
                EntityManagerFactoryBuilder builder) {
            return builder
                    .dataSource(internalDataSource())
                    .packages("cz.data.internal.entity")
                    .persistenceUnit(INTERNAL)
                    .build();
        }

        @Bean(name = "internalTransactionManager")
        @Primary
        public PlatformTransactionManager internalTransactionManager() {
            JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
            jpaTransactionManager.setDataSource(internalDataSource());
            jpaTransactionManager.setPersistenceUnitName(INTERNAL);
            return jpaTransactionManager;
        }
    }

DBExternalConfig

    @Configuration
    @EnableTransactionManagement
    @EnableJpaRepositories(
            basePackages = "cz.data.external",
            entityManagerFactoryRef = "externalEntityManagerFactory",
            transactionManagerRef = "externalTransactionManager")
    public class DBConfigExternal {


        public static final String EXTERNAL = "external";

        @Bean(name = "externalDataSource")
        @ConfigurationProperties(prefix = "spring.datasource-external")
        public DataSource externalDataSource() {
            return DataSourceBuilder.create().build();
        }

        @Bean(name = "externalEntityManagerFactory")
        public LocalContainerEntityManagerFactoryBean externalEntityManagerFactory(
                EntityManagerFactoryBuilder builder) {
            return builder
                    .dataSource(externalDataSource())
                    .packages("cz.data.external.entity")
                    .persistenceUnit(EXTERNAL)
                    .build();
        }

        @Bean(name = "externalTransactionManager")
        public PlatformTransactionManager externalTransactionManager() {
            JpaTransactionManager jpaTransactionManager = new JpaTransactionManager();
            jpaTransactionManager.setDataSource(externalDataSource());
            jpaTransactionManager.setPersistenceUnitName(EXTERNAL);
            return jpaTransactionManager;
        }
    }

MW

Answer 1

spring.jpa.hibernate.ddl-auto=create已停止工作,不是因为你有两个DataSource,而是因为你的应用程序正在创建它自己的LocalContainerEntityManagerFactoryBeans.这具有禁用a的自动配置的效果,LocalContainerEntityManagerFactoryBean因此您现在必须自己配置它.

您可以将两个实体管理器配置为具有不同的模式生成行为(第一个执行更新,第二个执行创建):

@Bean(name = "externalEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean externalEntityManagerFactory(
        EntityManagerFactoryBuilder builder) {
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("hibernate.hbm2ddl.auto", "update");
    return builder
            .dataSource(externalDataSource())
            .packages("cz.data.external.entity")
            .persistenceUnit(EXTERNAL)
            .properties(properties)
            .build();
}

@Bean(name = "internalEntityManagerFactory")
@Primary
public LocalContainerEntityManagerFactoryBean internalEntityManagerFactory(
        EntityManagerFactoryBuilder builder) {
    Map<String, Object> properties = new HashMap<String, Object>();
    properties.put("hibernate.hbm2ddl.auto", "create");
    return builder
            .dataSource(internalDataSource())
            .packages("cz.data.internal.entity")
            .persistenceUnit(INTERNAL)
            .properties(properties)
            .build();
}