The new version of Mybatis-Plus uses optimistic lock, how to use MP_OPTLOCK_VERSION_ORIGINAL and the new version of the plug-in

The new version of Mybatis-Plus uses optimistic lock, how to use MP_OPTLOCK_VERSION_ORIGINAL and the new version of the plug-in

In the old version of the configuration class, we usually register directly.

 // 注册乐观锁插件
    @Bean
    public OptimisticLockerInterceptor optimisticLockerInnerInterceptor() {
    
    
        return new OptimisticLockerInterceptor();
    }

Then in version 3.4.0, this usage was abandoned, and we can see the comments provided by the source code.

Old version:

New version: The

new version adds MybatisPlusInterceptor, which is equivalent to the total interceptor class. Put the original classes on it as internal classes. , Using the same idea as spring

We can use this method to configure the previous plug-in, and it is still a List collection, we can configure multiple plug-ins at the same time, take the optimistic lock plug-in and the paging plug-in for example:

 // 注册乐观锁插件与分页插件
 
    /**
     * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false 避免缓存出现问题(该属性会在旧插件移除后一同移除)
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
    
    
        MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
        //分页插件
        mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        //乐观锁插件
        mybatisPlusInterceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
        
        return mybatisPlusInterceptor;
    }

The old version needs to register multiple beans to configure

 // 注册乐观锁插件
    @Bean
    public OptimisticLockerInterceptor optimisticLockerInterceptor() {
    
    
        return new OptimisticLockerInterceptor();
    }

    // 分页插件
    @Bean
    public PaginationInterceptor paginationInterceptor() {
    
    
        return  new PaginationInterceptor();
    }

In this way, optimistic lock and paging plugins can be used normally, the same is true for other plugins