Spring事务管理

事务管理器接口PlatformTransactionManager

Spring事务管理中心接口

public interface PlatformTransactionManager{
    TransactionStatus getTransaction(@Nullable TransactionDefinition definition)
            throws TransactionException;

    void commit(TransactionStatus status) throws TransactionException;

    void rollback(TransactionStatus status) throws TransactionException;
}

常用实现类

事务管理器通常会在项目启动时初始化，以HibernateTransactionManager为例

    @Bean
    public HibernateTransactionManager transactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(sessionFactory().getObject());
        return transactionManager;
    }

事务定义TransactionDefinition

定义事务隔离级别与传播行为

public interface TransactionDefinition {

    int PROPAGATION_REQUIRED = 0;
    int PROPAGATION_SUPPORTS = 1;
    int PROPAGATION_MANDATORY = 2;
    int PROPAGATION_REQUIRES_NEW = 3;
    int PROPAGATION_NOT_SUPPORTED = 4;
    int PROPAGATION_NEVER = 5;
    int PROPAGATION_NESTED = 6;
    int ISOLATION_DEFAULT = -1;

    int ISOLATION_READ_UNCOMMITTED = Connection.TRANSACTION_READ_UNCOMMITTED;
    int ISOLATION_READ_COMMITTED = Connection.TRANSACTION_READ_COMMITTED;
    int ISOLATION_REPEATABLE_READ = Connection.TRANSACTION_REPEATABLE_READ;
    int ISOLATION_SERIALIZABLE = Connection.TRANSACTION_SERIALIZABLE;

    int TIMEOUT_DEFAULT = -1;
    int getPropagationBehavior();
    int getIsolationLevel();
    int getTimeout();
    boolean isReadOnly();
    @Nullable
    

TransactionInterceptor

声明式事务通过方法拦截器关联Spring的事务处理，编程式事务则是通过模板方法TransactionTemplate

事务同步器TransactionSynchronizationManager