У меня есть проект Spring Batch, в котором я читаю данные из источника данных, обрабатываю их и записываю в другой первичный источник данных. Я расширяю CrudRepository для операций дао.
Я пытаюсь настроить несколько источников данных для моего приложения springbatch + spring boot. Ниже приведена структура пакета:
myproject
---com
---batch
---config
---firstDsConfig.java
---secondDsConfig.java
---firstrepository
---firstCrudRepository.java
---secondRepository
---SecondCrudRepository.java
---firstEntity
---firstDBEntity.java
---secondEntity
---secondDBEntity.java
----main
---MyMainClass.java
Код для firstDsConfig.java:
@Configuration
@EnableJpaRepositories(
entityManagerFactoryRef = "firstEntityManagerFactory",
transactionManagerRef = "firstTransactionManager",
basePackages = "com.batch.firstrepository"
)
@EnableTransactionManagement
public class FirstDbConfig {
@Primary
@Bean(name = "firstEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean firstEntityManagerFactory(final EntityManagerFactoryBuilder builder,
final @Qualifier("firstDs") DataSource dataSource) {
return builder
.dataSource(dataSource)
.packages("com.batch.firstEntity")
.persistenceUnit("abc")
.build();
}
@Primary
@Bean(name = "firstTransactionManager")
public PlatformTransactionManager firstTransactionManager(@Qualifier("firstEntityManagerFactory")
EntityManagerFactory firstEntityManagerFactory) {
return new JpaTransactionManager(firstEntityManagerFactory);
}
@Primary
@Bean(name = "firstDs")
@ConfigurationProperties(prefix = "spring.datasource.first")
public DataSource firstDataSource() {
return DataSourceBuilder.create().build();
}
}
Код для secondDsConfig:
@Configuration
@EnableJpaRepositories(
entityManagerFactoryRef = "secondEntityManagerFactory",
transactionManagerRef = "secondTransactionManager",
basePackages = "com.batch.secondrepository"
)
@EnableTransactionManagement
public class FirstDbConfig {
@Primary
@Bean(name = "secondEntityManagerFactory")
public LocalContainerEntityManagerFactoryBean secondEntityManagerFactory(final EntityManagerFactoryBuilder builder,
final @Qualifier("secondDs") DataSource dataSource) {
return builder
.dataSource(dataSource)
.packages("com.batch.secondEntity")
.persistenceUnit("xyz")
.build();
}
@Primary
@Bean(name = "secondTransactionManager")
public PlatformTransactionManager secondTransactionManager(@Qualifier("secondEntityManagerFactory")
EntityManagerFactory firstEntityManagerFactory) {
return new JpaTransactionManager(secondEntityManagerFactory);
}
@Primary
@Bean(name = "secondDs")
@ConfigurationProperties(prefix = "spring.datasource.second")
public DataSource secondDataSource() {
return DataSourceBuilder.create().build();
}
}
Вот мой основной класс
@EnableScheduling
@EnableBatchProcessing
@SpringBootApplication(scanBasePackages = { "com.batch" })
public class MyMainClass {
@Autowired
private JobLauncher jobLauncher;
@Autowired
private JobRepository jobRepository;
@Autowired
@Qualifier(firstDs)
private DataSource dataSource;
@Autowired
@Qualifier("myJob")
private Job job;
public static void main(String[] args) throws Exception {
SpringApplication.run(MyMainClass.class, args);
}
@EventListener(ApplicationReadyEvent.class)
private void start() throws Exception {
jobLauncher.run(job, new JobParameters());
}
@Bean(name="jobService")
public JobService jobService() throws Exception {
SimpleJobServiceFactoryBean factoryBean = new SimpleJobServiceFactoryBean();
factoryBean.setDataSource(dataSource);
factoryBean.setJobRepository(jobRepository);
factoryBean.setJobLocator(new MapJobRegistry());
factoryBean.setJobLauncher(jobLauncher);
factoryBean.afterPropertiesSet();
return factoryBean.getObject();
}
}
Вот грубое репо:
Первый творожный репо
public interface FirstCrudRepository extends CrudRepository<FirstDbEntity, Integer> {
List<FirstDbEntity> findByOId(String oId);
}
Второй творожный репо
public interface SecondCrudRepository extends CrudRepository<SecondDbEntity, Integer> {
List<SecondDbEntity> findByPid(String pid);
}
Когда я запускаю свое приложение, я вижу следующую ошибку при сохранении записи с помощью FirstCrudRepository:
org.springframework.transaction.IllegalTransactionStateException: Pre-bound JDBC Connection found! JpaTransactionManager does not support running within DataSourceTransactionManager if told to manage the DataSource itself. It is recommended to use a single JpaTransactionManager for all transactions on a single DataSource, no matter whether JPA or JDBC access.
Примечание. Я могу успешно получать сведения из SecondCrudRepository