com.baomidou.mybatisplus.plugins

类 OptimisticLockerInterceptor

java.lang.Object

com.baomidou.mybatisplus.plugins.OptimisticLockerInterceptor

所有已实现的接口:

org.apache.ibatis.plugin.Interceptor

@Intercepts(value=@Signature(type=org.apache.ibatis.executor.Executor.class,method="update",args={org.apache.ibatis.mapping.MappedStatement.class,java.lang.Object.class}))
public class OptimisticLockerInterceptor
extends Object
implements org.apache.ibatis.plugin.Interceptor

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 OptimisticLockerInterceptor into mybatis plugin.

How to work?
if update entity with version column=1:
(1) no OptimisticLockerInterceptor:
SQL: update tbl_test set name='abc' where id=100001;
(2) add OptimisticLockerInterceptor:
SQL: update tbl_test set name='abc',version=2 where id=100001 and version=1;

作者:

yuxiaobin

字段概要

字段

限定符和类型	字段和说明
static String	MP_OPTLOCK_ET_ORIGINAL

构造器概要

构造器

构造器和说明
OptimisticLockerInterceptor()

方法概要

方法

限定符和类型	方法和说明
protected Object	getUpdatedVersionVal(Object originalVersionVal) This method provides the control for version value.
Object	intercept(org.apache.ibatis.plugin.Invocation invocation)
Object	plugin(Object target)
void	setProperties(Properties properties)

从类继承的方法 java.lang.Object

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

字段详细资料

MP_OPTLOCK_ET_ORIGINAL

public static final String MP_OPTLOCK_ET_ORIGINAL

另请参阅:

常量字段值

构造器详细资料

OptimisticLockerInterceptor

public OptimisticLockerInterceptor()

方法详细资料

intercept

public Object intercept(org.apache.ibatis.plugin.Invocation invocation)
                 throws Throwable

指定者:

intercept 在接口中 org.apache.ibatis.plugin.Interceptor

抛出:

Throwable

getUpdatedVersionVal

protected Object getUpdatedVersionVal(Object originalVersionVal)

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

参数:

originalVersionVal -

返回:

updated version val

plugin

public Object plugin(Object target)

指定者:

plugin 在接口中 org.apache.ibatis.plugin.Interceptor

setProperties

public void setProperties(Properties properties)

指定者:

setProperties 在接口中 org.apache.ibatis.plugin.Interceptor