程序包 com.baomidou.mybatisplus.extension.plugins.inner

类 OptimisticLockerInnerInterceptor

java.lang.Object

com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor

所有已实现的接口:

InnerInterceptor

public class OptimisticLockerInnerInterceptor
extends Object
implements InnerInterceptor

Optimistic Lock Light version

Intercept on Executor.update;

Support version types: int/Integer, long/Long, java.util.Date, java.sql.Timestamp

For extra types, please define a subclass and override getUpdatedVersionVal() method.

How to use?

(1) Define an Entity and add Version annotation on one entity field.

(2) Add OptimisticLockerInnerInterceptor into mybatis plugin.

How to work?

if update entity with version column=1:

(1) no OptimisticLockerInnerInterceptor:

SQL: update tbl_test set name='abc' where id=100001;

(2) add OptimisticLockerInnerInterceptor:

SQL: update tbl_test set name='abc',version=2 where id=100001 and version=1;

从以下版本开始:

3.4.0

作者:

yuxiaobin

构造器概要

构造器

构造器	说明
OptimisticLockerInnerInterceptor()
OptimisticLockerInnerInterceptor(boolean wrapperMode)

方法概要

修饰符和类型	方法	说明
void	beforeUpdate(org.apache.ibatis.executor.Executor executor, org.apache.ibatis.mapping.MappedStatement ms, Object parameter)	Executor.update(MappedStatement, Object) 操作前置处理
protected void	doOptimisticLocker(Map<String,Object> map, String msId)
protected Object	getUpdatedVersionVal(Class<?> clazz, Object originalVersionVal)	This method provides the control for version value. Returned value type must be the same as original one.
protected com.baomidou.mybatisplus.core.metadata.TableFieldInfo	getVersionFieldInfo(Class<?> entityClazz)
void	setException(RuntimeException exception)	自定义异常处理

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 com.baomidou.mybatisplus.extension.plugins.inner.InnerInterceptor

beforeGetBoundSql, beforePrepare, beforeQuery, setProperties, willDoQuery, willDoUpdate

构造器详细资料

OptimisticLockerInnerInterceptor

public OptimisticLockerInnerInterceptor()

OptimisticLockerInnerInterceptor

public OptimisticLockerInnerInterceptor(boolean wrapperMode)

方法详细资料

beforeUpdate

public void beforeUpdate(org.apache.ibatis.executor.Executor executor,
 org.apache.ibatis.mapping.MappedStatement ms,
 Object parameter)

从接口复制的说明: InnerInterceptor

Executor.update(MappedStatement, Object) 操作前置处理

改改sql啥的

指定者:

beforeUpdate 在接口中 InnerInterceptor

参数:

executor - Executor(可能是代理对象)

ms - MappedStatement

parameter - parameter

doOptimisticLocker

protected void doOptimisticLocker(Map<String,Object> map,
 String msId)

getVersionFieldInfo

protected com.baomidou.mybatisplus.core.metadata.TableFieldInfo getVersionFieldInfo(Class<?> entityClazz)

getUpdatedVersionVal

protected Object getUpdatedVersionVal(Class<?> clazz,
 Object originalVersionVal)

This method provides the control for version value.
Returned value type must be the same as original one.

参数:

originalVersionVal - ignore

返回:

updated version val

setException

public void setException(RuntimeException exception)

自定义异常处理