问:什么是事务的传播行为?
答:事务传播行为:Spring 中,当一个 service 方法调用另外一个 service 方法的时候,因为每个 service 方法都有事 务,这时候就出现了事务的嵌套;由此,就产生了事务传播行为;
PROPAGATION_REQUIRED--支持当前事务,如果当前没有事务,就新建一个事务。这是最常见的选择。PROPAGATION_SUPPORTS--支持当前事务,如果当前没有事务,就以非事务方式执行。
PROPAGATION_MANDATORY--支持当前事务,如果当前没有事务,就抛出异常。
PROPAGATION_REQUIRES_NEW--新建事务,如果当前存在事务,把当前事务挂起。
PROPAGATION_NOT_SUPPORTED--以非事务方式执行操作,如果当前存在事务,就把当前事务挂起。
PROPAGATION_NEVER--以非事务方式执行,如果当前存在事务,则抛出异常
例子:
<tx:attributes>
<tx:methodname="insert*" propagation="REQUIRED"/>
<tx:methodname="update*"propagation="REQUIRED"/>
<tx:methodname="edit*" propagation="REQUIRED"/>
<tx:methodname="save*"propagation="REQUIRED"/>
<tx:methodname="add*"propagation="REQUIRED"/>
<tx:methodname="new*" propagation="REQUIRED" />
<tx:methodname="set*" propagation="REQUIRED"/>
<tx:methodname="remove*"propagation="REQUIRED"/>
<tx:methodname="delete*" propagation="REQUIRED"/>
<tx:methodname="change*" propagation="REQUIRED"/>
<tx:methodname="get*" propagation="REQUIRED"read-only="true"/>
<tx:methodname="find*" propagation="REQUIRED" read-only="true"/>
<tx:methodname="load*" propagation="REQUIRED" read-only="true"/>
<tx:methodname="*" propagation="REQUIRED"read-only="true"/>
</tx:attributes>
beans.xml的经典写法(前提是xml方式实现的声明式事务):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:property-placeholder location="jdbc.properties"/>
<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!--jdbc事物管理器-->
<bean id="transactionManager1"class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource1"></property>
</bean>
<tx:advice id="txAdvice1" transaction-manager="transactionManager1">
<tx:attributes>
<tx:method name="insert*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="edit*" propagation="REQUIRED"/>
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="add*" propagation="REQUIRED"/>
<tx:method name="new*" propagation="REQUIRED" />
<tx:method name="set*" propagation="REQUIRED"/>
<tx:method name="remove*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="change*" propagation="REQUIRED"/>
<tx:method name="get*" propagation="REQUIRED" read-only="true"/>
<tx:method name="find*" propagation="REQUIRED" read-only="true"/>
<tx:method name="load*" propagation="REQUIRED" read-only="true"/>
<tx:method name="*" propagation="REQUIRED" read-only="true"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:pointcut id="serviceMethod1" expression="execution(* com.cruise.service.*.*(..))"/>
<aop:advisor advice-ref="txAdvice1" pointcut-ref="serviceMethod1"/>
</aop:config>
<bean id="namedParameterJdbcTemplate1"class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
<constructor-arg ref="dataSource1"></constructor-arg>
</bean>
<bean id="bankDao1" class="com.cruise.dao.impl.BankDaoImpl">
<property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate1"></property>
</bean>
<bean id="bankService" class="com.cruise.service.impl.BankServiceImpl">
<property name="bankDao" ref="bankDao1"></property>
</bean>
</beans>
第十三讲:13 spring的事务的传播行为
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转载自blog.csdn.net/u010393325/article/details/83747620
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