使用Spring Batch进行事务管理

Question

我发现实际上是Spring，我能够设置一些工作。现在，我想使用Hibernate/JPA将导入的数据保存到数据库中，但我总是出现这样的错误：

14:46:43.500 [main] ERROR o.s.b.core.step.AbstractStep   - Encountered an error executing the step javax.persistence.TransactionRequiredException: no transaction is in progress

我明白问题出在交易上。以下是EntityManager和TransactionManager的spring java配置：

 @Configuration
public class PersistenceSpringConfig implements EnvironmentAware
{


    @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory() throws Exception
  {
    // Initializes the entity manager
    LocalContainerEntityManagerFactoryBean factoryBean = new LocalContainerEntityManagerFactoryBean();
    factoryBean.setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
    factoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
    factoryBean.setDataSource(dataSource());

    // Scans the database model
    factoryBean.setPackagesToScan(EntiteJuridiqueJPA.class.getPackage().getName());

    // Defines the Hibernate properties
    Properties jpaProperties = new Properties();
    jpaProperties.setProperty("hibernate.show_sql", "false");
    jpaProperties.setProperty("hibernate.format_sql", "false");
    String connectionURL = "jdbc:h2:file:" + getDatabaseLocation();
    jpaProperties.setProperty("hibernate.connection.url", connectionURL);
    jpaProperties.setProperty("hibernate.connection.username", "sa");
    jpaProperties.setProperty("hibernate.connection.driver_class", "org.h2.Driver");
    jpaProperties.setProperty("hibernate.dialect", H2Dialect.class.getName());
    jpaProperties.setProperty("hibernate.hbm2ddl.auto", "create");
    jpaProperties.setProperty("hibernate.hbm2ddl.import_files_sql_extractor", "org.hibernate.tool.hbm2ddl.MultipleLinesSqlCommandExtractor");
    jpaProperties.setProperty("hibernate.hbm2ddl.import_files",
        "org/springframework/batch/core/schema-drop-h2.sql,org/springframework/batch/core/schema-h2.sql");

    factoryBean.setJpaProperties(jpaProperties);
    return factoryBean;
  }



 @Bean
  public PlatformTransactionManager transactionManager2() throws Exception
  {
    EntityManagerFactory object = entityManagerFactory().getObject();
    JpaTransactionManager jpaTransactionManager = new JpaTransactionManager(object);
    return jpaTransactionManager;
  }

 @Bean
  public ItemWriter<EntiteJuridiqueJPA> writer()
  {
    JpaItemWriter<EntiteJuridiqueJPA> writer = new JpaItemWriter<EntiteJuridiqueJPA>();    
    writer.setEntityManagerFactory(entityManagerFactory.getObject());
    return writer;
  }

这是导致异常的代码:javax.persistence.TransactionRequiredException:没有事务正在进行

有什么解决这个问题的想法吗？

[编辑]我也放入了作业定义和步骤定义。我所有的Spring配置都是用Java编写的。

 @Configuration
@EnableBatchProcessing
@Import(PersistenceSpringConfig.class)
public class BatchSpringConfig
{
  @Autowired
  private JobBuilderFactory  jobBuilders;

  @Autowired
  private StepBuilderFactory stepBuilders;

  @Autowired
  private DataSource         dataSource;

  @Autowired
  private LocalContainerEntityManagerFactoryBean entityManagerFactory;

  @Bean
  public Step step()
  {
    return stepBuilders.get("step").<EntiteJuridique, EntiteJuridiqueJPA> chunk(5).reader(cvsReader(null))
        .processor(processor()).writer(writer()).listener(processListener()).build();
  }

  @Bean
  @StepScope
  public FlatFileItemReader<EntiteJuridique> cvsReader(@Value("#{jobParameters[input]}") String input)
  {
    FlatFileItemReader<EntiteJuridique> flatFileReader = new FlatFileItemReader<EntiteJuridique>();
    flatFileReader.setLineMapper(lineMapper());
    flatFileReader.setResource(new ClassPathResource(input));
    return flatFileReader;
  }

  @Bean
  public LineMapper<EntiteJuridique> lineMapper()
  {
    DefaultLineMapper<EntiteJuridique> lineMapper = new DefaultLineMapper<EntiteJuridique>();
    DelimitedLineTokenizer lineTokenizer = new DelimitedLineTokenizer();
    lineTokenizer.setDelimiter(";");
    lineTokenizer.setNames(new String[] { "MEGA_ENTITE", "PORTEFEUILLE", "MEGA_ENTITE", "Libellé" });

    BeanWrapperFieldSetMapper<EntiteJuridique> fieldSetMapper = new BeanWrapperFieldSetMapper<EntiteJuridique>();
    fieldSetMapper.setTargetType(EntiteJuridique.class);

    lineMapper.setLineTokenizer(lineTokenizer);
    lineMapper.setFieldSetMapper(fieldSetMapper);

    return lineMapper;
  }

  @Bean
  public Job dataInitializer()
  {
    return jobBuilders.get("dataInitializer").listener(protocolListener()).start(step()).build();
  }

  @Bean
  public ItemProcessor<EntiteJuridique, EntiteJuridiqueJPA> processor()
  {
    return new EntiteJuridiqueProcessor();
  }

  @Bean
  public ItemWriter<EntiteJuridiqueJPA> writer()
  {
    JpaItemWriter<EntiteJuridiqueJPA> writer = new JpaItemWriter<EntiteJuridiqueJPA>();    
    writer.setEntityManagerFactory(entityManagerFactory.getObject());
    return writer;
    // return new EntiteJuridiqueWriter();
  }

  @Bean
  public ProtocolListener protocolListener()
  {
    return new ProtocolListener();
  }

  @Bean
  public CSVProcessListener processListener()
  {
    return new CSVProcessListener();
  }

  @Bean
  public PlatformTransactionManager transactionManager2() throws Exception
  {
    EntityManagerFactory object = entityManagerFactory.getObject();
    JpaTransactionManager jpaTransactionManager = new JpaTransactionManager(object);
    return jpaTransactionManager;
  }

任何人都可以给出更多的见解，如何在spring Batch中管理事务？谢谢你的帮助？

Answer 1

问题是您正在创建第二个事务管理器(transactionManager2)，但Spring Batch正在使用另一个事务管理器来启动事务。如果您使用@enableBatchProcessing，Spring Batch会自动注册一个事务管理器用于其事务，而您的JpaTransactionManager永远不会被使用。如果希望更改Spring Batch用于事务的事务管理器，则必须实现接口BatchConfigurer。看看这个例子：https://github.com/codecentric/spring-batch-javaconfig/blob/master/src/main/java/de/codecentric/batch/configuration/websphereinfrastructureconfiguration.java。在这里，我将事务管理器切换到WebspherUowTransactionManager，您可以以同样的方式将事务管理器切换到其他事务管理器。下面是解释它的博客文章的链接:http://blog.codecentric.de/en/2013/06/spring-batch-2-2-javaconfig-part-3-profiles-and-environments/