java – Spring @Transactional没有回滚

2023年5月11日 220次阅读

我正在使用
Spring的NamedParameterJdbcTemplate,我正在尝试使用@Transactional来确保两个插入既可以持久保存到数据库,也可以回滚,以防另一个插入失败.

该代码旨在与MySql一起运行,并在内存中使用H2进行测试.

它没有用……第二次插入失败但第一次没有回滚.

以下是相关课程：

MySpringConfig.java

package com.MyPackage.spring

@Configuration
@ComponentScan({ "com.MyPackage" })
public class MySpringConfig {

@Bean
public NamedParameterJdbcTemplate namedParameterJdbcTemplate() throws Exception {
    return new NamedParameterJdbcTemplate(dataSource());
}

@Bean
public DataSourceTransactionManager dataSourceTransactionManager() throws Exception {
    return new DataSourceTransactionManager(dataSource());
}


@Bean(name = "customerEntitiesDataSource")
public DataSource dataSource() throws Exception {
    Properties properties = new Properties();
    properties.put("url", "db-url");
    properties.put("username", "uName");
    properties.put("password", "pwd");
    BasicDataSource dataSource = BasicDataSourceFactory.createDataSource(properties);
    return dataSource;
}
}

MyDao.java

package com.MyPackage.dao

@Repository
public class MyDao {
    private ObjectMapper mapper = new ObjectMapper();

    @Autowired
    private NamedParameterJdbcTemplate jdbcTemplate;

    private static String INSERT_ELEMENT_QUERY = "INSERT INTO TableA..." + " VALUES (:param1, :param2)";

    @Transactional(rollbackFor = {Exception.class}, propagation=Propagation.REQUIRED)
    public void storeElements(List<Element> element) {


        Stream<HashMap<String, Object>> hashMapStream = elements.stream().map(
                element -> {
                    HashMap<String, Object> params = new HashMap<>();
                    params.put("param1", element.getParam1());
                    params.put("param2", element.getParam2());
                    return params;
                }
        );
        List<Map<String, Object>> collect = hashMapStream.collect(Collectors.<Map<String, Object>>toList());
        Map<String, Object>[] batchValues = new Map[]{};
        batchValues = collect.toArray(batchValues);

        jdbcTemplate.batchUpdate(INSERT_ELEMENT_QUERY, batchValues);

        computers.stream().forEach(element -> saveExtraData(element));
    }


    private static String INSERT_ELEMENT_EXTRA_DATA_QUERY = "INSERT INTO TableB... Values (:val1, :val2)";

    @Transactional(rollbackFor = {Exception.class}, propagation=Propagation.REQUIRED)
    public void saveExtraData(Element element) {

        Stream<HashMap<String, Object>> hashMapStream = element.getExtraData().stream().map(
                extra -> {
                    HashMap<String, Object> params = new HashMap<>();
                    params.put("val1", extra.getVal1());
                    params.put("val2", extra.getVal2());
                    return params;
                }
        );
        List<Map<String, Object>> collect = hashMapStream.collect(Collectors.<Map<String, Object>>toList());
        Map<String, Object>[] batchValues = new Map[]{};
        batchValues = collect.toArray(batchValues);

        jdbcTemplate.batchUpdate(INSERT_ELEMENT_EXTRA_DATA_QUERY , batchValues);
    }
}

我正在运行的测试是：将一个Elements列表发送到storeElements(),但要确保其中一个元素的extraData太长而无法存储在TableB中.然后我检查数据库以确保没有元素存储在数据库中.

插入失败,但没有回滚.

整个代码是一个Spring堆栈,从测试,一直到storeElements方法.

运行调试时,我发现在加载Spring上下文时,除了构造函数之外,没有调用任何DataSourceTransactionManager方法.

我在这里错过了什么？

最佳答案 使用@EnableTransactionManagement注释MySpringConfig以启用事务管理.

@Configuration
@ComponentScan({ "com.MyPackage" })
@EnableTransactionManagement
public class MySpringConfig {
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