我正在使用Spring Boot。我最终设法设置了两个数据源,但现在我面临另一个问题。
- 当有两个数据源时,
spring.jpa.hibernate.ddl-auto=create
在我的Spring Boot应用程序中似乎不起作用,只有spring.jpa.generate-ddl=true
才能完成工作。 - 我无法为每个数据源选择自动创建策略。我希望为数据源一创建模式,并在第二个数据源(数据源二)中使用所创建的模式。
有人知道如何解决这些问题吗?请注意,如果可能,我不想完全放弃自动配置。我甚至还不知道,Hibernate是否能够只初始化一个持久化单元的模式。
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
数据库内部配置
@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
:数据库外部配置。
@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;
}
}
M.W.
spring.jpa.hibernate.ddl-auto=create
只因您有两个数据源而停止工作。Spring Boot 将自动配置 Hibernate 以使用@Primary
的任意一个数据源。 我猜测您添加了一些额外的配置,从而关闭了 Hibernate 的自动配置,但因为您没有提供足够的信息来重新创建您正在尝试解决的问题,所以很难确定。 - Andy Wilkinson