MySQL 5.7 Spring JPA 事务管理不起作用
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【中文标题】MySQL 5.7 Spring JPA 事务管理不起作用【英文标题】:MySQL 5.7 Spring JPA transaction management not worknig 【发布时间】:2021-10-15 09:54:22 【问题描述】:mysql 版本:5.7.35
正在使用的 MySQL JDBC 驱动程序:mysql-connector-java-8.0.25.jar:8.0.25
Spring Boot:2.5.0
我有两个数据库表:
create table first
(
id bigint auto_increment
primary key,
item_id int not null,
element varchar(25) not null
version int not null,
unique (item_id, element)
) ENGINE=InnoDB;
和
create table second
(
id bigint auto_increment
primary key,
item_id int not null,
element varchar(25) not null
version int not null,
unique(item_id, element)
) ENGINE=InnoDB;
我们不用担心为什么我有 2 张外观完全相同的桌子。我在这里简化问题陈述。实际上,业务逻辑需要 2 个具有多列的独立表。
在我的 Spring Boot 2 应用程序中,我必须配置 2 个数据源:Vertica
(用于读取数据)和MySQL 5.7.35
用于持久化。
相关的MySQLDataSourceConfig.java
(我也有类似的课程VerticaDataSourceConfig.java
,这里不展示)
@Configuration
@ConfigurationProperties("mysql.datasource")
@EnableTransactionManagement
@EnableJpaRepositories(
entityManagerFactoryRef = "mysqlEntityManagerFactory",
transactionManagerRef = "mysqlTransactionManager",
basePackages = "com.mysql.package.repository"
)
public class MySQLDataSourceConfig extends HikariConfig
public final static String PERSISTENCE_UNIT_NAME = "mysql";
public final static String PACKAGES_TO_SCAN = "com.mysql.package.entity";
@Autowired private Environment env;
@Bean
public HikariDataSource mysqlDataSource()
return new HikariDataSource(this);
@Bean
public LocalContainerEntityManagerFactoryBean mysqlEntityManagerFactory(
final HikariDataSource mysqlDataSource)
return new LocalContainerEntityManagerFactoryBean()
setDataSource(mysqlDataSource);
setPersistenceProviderClass(HibernatePersistenceProvider.class);
setPersistenceUnitName(PERSISTENCE_UNIT_NAME);
setPackagesToScan(PACKAGES_TO_SCAN);
HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setDatabasePlatform("org.hibernate.dialect.MySQL57Dialect");
adapter.setDatabase(Database.MYSQL);
adapter.setShowSql(true);
setJpaVendorAdapter(adapter);
Properties jpaProperties = new Properties();
jpaProperties.put("hibernate.ddl-auto", env.getProperty("mysql.jpa.hibernate.ddl-auto"));
jpaProperties.put("hibernate.show-sql", env.getProperty("mysql.jpa.hibernate.show-sql"));
jpaProperties.put("hibernate.format_sql", env.getProperty("mysql.jpa.hibernate.format_sql"));
//jpaProperties.put("hibernate.dialect", env.getProperty("mysql.jpa.properties.hibernate.dialect"));
setJpaProperties(jpaProperties);
afterPropertiesSet();
;
@Bean
public PlatformTransactionManager mysqlTransactionManager(EntityManagerFactory mysqlEntityManagerFactory)
return new JpaTransactionManager(mysqlEntityManagerFactory);
application.yaml
用于 MySQL
特定属性(Vertica
的类似属性未在此处显示:
spring:
autoconfigure:
exclude: >
org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration,
org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration,
org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration
mysql:
datasource:
jdbc-url: jdbc:mysql://$MYSQL_HOST:localhost:3306/mydb
username: root
password: mypassword
driver-class-name: com.mysql.jdbc.Driver
hikari:
connectionTimeout: 30000
idleTimeout: 30000
maxLifetime: 2000000
maximumPoolSize: 20
minimumIdle: 5
poolName: mysql-db-pool
#username: $DB_USER
#password: $DB_PASSWORD
jpa:
hibernate:
ddl-auto: none
format_sql: true
show-sql: true
naming:
physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
naming-strategy: org.hibernate.cfg.ImprovedNamingStrategy
properties:
hibernate:
#dialect: org.hibernate.dialect.MySQL57Dialect
dialect: org.hibernate.dialect.MySQLInnoDBDialect
#storage_engine: innodb
#default_schema: hotspot
这里是存储库类:
MySQLFirstRepository.java
@Repository
public interface MySQLFirstRepository extends CrudRepository<First, BigInteger>
MySQLSecondRepository.java
@Repository
public interface MySQLSecondRepository extends CrudRepository<Second, BigInteger>
您也可以假设我在运行应用程序时提供了一个 JVM 属性:
-Dhibernate.dialect.storage_engine=innodb
以下是实体类:
First.java
@Entity
@Table(name = "first")
@Getter
@Builder
@ToString
@NoArgsConstructor
@AllArgsConstructor
public class First
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private BigInteger id;
@Column(name = "item_id")
private BigInteger itemId;
@Column(name = "element")
private String element;
@Column(name = "version")
@Version
private int version;
Second.java
@Entity
@Table(name = "second")
@Getter
@Builder
@ToString
@NoArgsConstructor
@AllArgsConstructor
public class Second
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private BigInteger id;
@Column(name = "item_id")
private BigInteger itemId;
@Column(name = "element")
private String element;
@Column(name = "version")
@Version
private int version;
问题:
在我的服务类中,我有这样的东西:
@Transactional(
transactionManager = "mysqlTransactionManager",
propagation = Propagation.REQUIRED,
rollbackFor = Exception.class,
isolation = Isolation.DEFAULT)
public void persist(List<First> firstList, List<Second> secondList)
firstRepo.saveAll(firstList);
secondRepo.saveAll(secondList);
secondRepo.saveAll(secondList)
方法抛出以下异常:
org.springframework.orm.jpa.JpaSystemException: org.hibernate.exception.ConstraintViolationException: could not execute statement; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.ConstraintViolationException: could not execute statement
尽管如此,第一个表被填充并且没有回滚。我读到这可能是由于 MySQL 中基于MyISAM
与InnoDB
的表,尝试了几件事(如您在上面代码片段中的注释行中所见),尝试设置前面提到的 JVM 系统属性,尝试将ENGINE=InnoDB
放入我的CREATE TABLE
语句中,但似乎没有任何效果。
请问可以帮忙吗?如果在发布之前先尝试解决方案,我将不胜感激,因为如上所述,我已经尝试了技术论坛上几乎所有可用的方法。
请注意,标准 Spring JPA 属性无法配置,因为我必须定义自己的 DataSourceConfig(因为有多个数据源),所以我必须使用 Hibernate 属性,正如您在上面的 MySQLDataSourceConfig.java
中看到的那样。
【问题讨论】:
【参考方案1】:我最终能够自己解决这个问题。在此处发布详细信息,以便其他人受益。
首先要了解一些事实:
MySQL 5.7 以上,默认存储引擎为 InnoDB (https://dev.mysql.com/doc/refman/5.7/en/innodb-introduction.html)
In MySQL 5.7, InnoDB is the default MySQL storage engine. Unless you have configured a different default storage engine, issuing a CREATE TABLE statement without an ENGINE clause creates an InnoDB table.
不需要使用-Dhibernate.dialect.storage_engine=innodb
命令行系统属性。
MySQL*InnoDBDialect
类已弃用
要使用的方言是:org.hibernate.dialect.MySQL57Dialect
解决方案:
Spring @Transactional 似乎没有被默认的 Spring Proxy AOP 正确拦截。解决方案是使用 Aspect J (Does Spring @Transactional attribute work on a private method?)
或
重构代码以确保@Transactional 方法的调用者驻留在不同的类中。
这是一个例子(只是一个例子来说明我的意思,代码应该被适当地重构并且应该使用适当的编码和设计原则)
来电代码:
@Service
public class MyService
@Autowired private Persister persister;
public void doSomething()
// do something to get a list of entity First and Second
persister.persist(firstEntityList, secondEntityList);
被调用者:
public class Persister
@Autowired private MySQLFirstRepository firstRepo;
@Autowired private MySQLSecondRepository secondRepo;
@Transactional("mysqlTransactionManager") // use other attributes to suit your needs; see some options above in the question
public void persist(List<First> firstEntityList, List<Second> secondEntityList)
firstRepo.saveAll(firstEntityList);
secondRepo.saveAll(secondEntityList);
【讨论】:
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