Spring配置事务在DAO层和SERVICE层(事务在service中的实现)
2011-03-19 20:31
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Spring通过AOP实现声明式事务管理。通常通过TransactionProxyFactoryBean设置Spring事务代理。我们需要一个目标对象包装在事务代理中。这个目标对象一般是一个普通Java对象的bean。当我们定义TransactionProxyFactoryBean时,必须提供一个相关的 PlatformTransactionManager的引用和事务属性。 事务属性含有上面描述的事务定义。
PlatformTransactionManager:
HibernateTransactionManager需要一个SessionFactory的引用
JtaTransactionManager
一.把事务放置在了DAO层:
Java代码
<!—hibernateTransactionManager-->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—DAO层接口实现-->
<bean id="companyDAOTarget"
class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—spring对DAO层的事务代理-->
<bean id="companyDAOProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="target">
<ref local="companyDAOTarget" />
</property>
<property name="transactionAttributes">
<props>
<prop key="insert*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="find*">
PROPAGATION_REQUIRED,readOnly
</prop>
</props>
</property>
</bean>
<!—业务层接口实现,把DAO注入到Service里面-->
<bean name="companyManageTarget"
class="com.vstsoft.querycompany.service.impl.CompanyManageTarget">
<property name="companyDAO">
<ref bean="companyDAOProxy" />
</property>
</bean>
<!—spring对Service层的代理-->
<bean id="companyManageProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>com.vstsoft.querycompany.service.CompanyManage</value>
</property>
<property name="target">
<ref bean="companyManageTarget" />
</property>
</bean>
<!—配置struts访问,把service层注入到action里面-->
<bean name="/company"
class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false">
<property name="companyManage">
<ref local="companyManageProxy" />
</property>
</bean>
二.把事务放置在了Service层:
Java代码
<!—jtaTransactionManager-->
<bean id="jtaTransactionManager"
class="org.springframework.transaction.jta.JtaTransactionManager" />
<!—DAO层接口实现-->
<bean id="companyDAOTarget"
class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—spring对DAO层的代理-->
<bean id="companyDAOProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>com.vstsoft.querycompany.dao.CompanyDAO</value>
</property>
<property name="target">
<ref bean="companyDAOTarget" />
</property>
</bean>
<!—业务层接口实现,把DAO注入到Service里面-->
<bean name="companyManageTarget"
class="com.vstsoft.querycompany.service.impl.CompanyManageTarget">
<property name="companyDAO">
<ref bean="companyDAOProxy" />
</property>
</bean>
<!—spring代理业务层的事务管理-->
<bean id="companyManageProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref local="jtaTransactionManager" />
</property>
<property name="transactionAttributes">
<props>
<prop key="set*">PROPAGATION_REQUIRED</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
<property name="target">
<ref bean="companyManageTarget" />
</property>
</bean>
<!—配置struts访问,把service层注入到action里面-->
<bean name="/company"
class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false">
<property name="companyManage">
<ref local="companyManageProxy" />
</property>
</bean>
例如:在service层的接口实现CompanyManageImpl里面有个setData方法:按顺序执行对数据库的数据查询,数据删除,数据插入数据库,如果哪一步出异常(运行时异常),以上三个操作都将事务回滚。
PlatformTransactionManager:
HibernateTransactionManager需要一个SessionFactory的引用
JtaTransactionManager
一.把事务放置在了DAO层:
Java代码
<!—hibernateTransactionManager-->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—DAO层接口实现-->
<bean id="companyDAOTarget"
class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—spring对DAO层的事务代理-->
<bean id="companyDAOProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref bean="transactionManager" />
</property>
<property name="target">
<ref local="companyDAOTarget" />
</property>
<property name="transactionAttributes">
<props>
<prop key="insert*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="find*">
PROPAGATION_REQUIRED,readOnly
</prop>
</props>
</property>
</bean>
<!—业务层接口实现,把DAO注入到Service里面-->
<bean name="companyManageTarget"
class="com.vstsoft.querycompany.service.impl.CompanyManageTarget">
<property name="companyDAO">
<ref bean="companyDAOProxy" />
</property>
</bean>
<!—spring对Service层的代理-->
<bean id="companyManageProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>com.vstsoft.querycompany.service.CompanyManage</value>
</property>
<property name="target">
<ref bean="companyManageTarget" />
</property>
</bean>
<!—配置struts访问,把service层注入到action里面-->
<bean name="/company"
class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false">
<property name="companyManage">
<ref local="companyManageProxy" />
</property>
</bean>
<!—hibernateTransactionManager--> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory"> <ref local="sessionFactory" /> </property> </bean> <!—DAO层接口实现--> <bean id="companyDAOTarget" class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl"> <property name="sessionFactory"> <ref local="sessionFactory" /> </property> </bean> <!—spring对DAO层的事务代理--> <bean id="companyDAOProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> <property name="transactionManager"> <ref bean="transactionManager" /> </property> <property name="target"> <ref local="companyDAOTarget" /> </property> <property name="transactionAttributes"> <props> <prop key="insert*">PROPAGATION_REQUIRED</prop> <prop key="delete*">PROPAGATION_REQUIRED</prop> <prop key="find*"> PROPAGATION_REQUIRED,readOnly </prop> </props> </property> </bean> <!—业务层接口实现,把DAO注入到Service里面--> <bean name="companyManageTarget" class="com.vstsoft.querycompany.service.impl.CompanyManageTarget"> <property name="companyDAO"> <ref bean="companyDAOProxy" /> </property> </bean> <!—spring对Service层的代理--> <bean id="companyManageProxy" class="org.springframework.aop.framework.ProxyFactoryBean"> <property name="proxyInterfaces"> <value>com.vstsoft.querycompany.service.CompanyManage</value> </property> <property name="target"> <ref bean="companyManageTarget" /> </property> </bean> <!—配置struts访问,把service层注入到action里面--> <bean name="/company" class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false"> <property name="companyManage"> <ref local="companyManageProxy" /> </property> </bean>
二.把事务放置在了Service层:
Java代码
<!—jtaTransactionManager-->
<bean id="jtaTransactionManager"
class="org.springframework.transaction.jta.JtaTransactionManager" />
<!—DAO层接口实现-->
<bean id="companyDAOTarget"
class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<!—spring对DAO层的代理-->
<bean id="companyDAOProxy"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>com.vstsoft.querycompany.dao.CompanyDAO</value>
</property>
<property name="target">
<ref bean="companyDAOTarget" />
</property>
</bean>
<!—业务层接口实现,把DAO注入到Service里面-->
<bean name="companyManageTarget"
class="com.vstsoft.querycompany.service.impl.CompanyManageTarget">
<property name="companyDAO">
<ref bean="companyDAOProxy" />
</property>
</bean>
<!—spring代理业务层的事务管理-->
<bean id="companyManageProxy"
class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager">
<ref local="jtaTransactionManager" />
</property>
<property name="transactionAttributes">
<props>
<prop key="set*">PROPAGATION_REQUIRED</prop>
<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
<property name="target">
<ref bean="companyManageTarget" />
</property>
</bean>
<!—配置struts访问,把service层注入到action里面-->
<bean name="/company"
class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false">
<property name="companyManage">
<ref local="companyManageProxy" />
</property>
</bean>
<!—jtaTransactionManager--> <bean id="jtaTransactionManager" class="org.springframework.transaction.jta.JtaTransactionManager" /> <!—DAO层接口实现--> <bean id="companyDAOTarget" class="com.vstsoft.querycompany.dao.impl.CompanyDAOImpl"> <property name="sessionFactory"> <ref local="sessionFactory" /> </property> </bean> <!—spring对DAO层的代理--> <bean id="companyDAOProxy" class="org.springframework.aop.framework.ProxyFactoryBean"> <property name="proxyInterfaces"> <value>com.vstsoft.querycompany.dao.CompanyDAO</value> </property> <property name="target"> <ref bean="companyDAOTarget" /> </property> </bean> <!—业务层接口实现,把DAO注入到Service里面--> <bean name="companyManageTarget" class="com.vstsoft.querycompany.service.impl.CompanyManageTarget"> <property name="companyDAO"> <ref bean="companyDAOProxy" /> </property> </bean> <!—spring代理业务层的事务管理--> <bean id="companyManageProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> <property name="transactionManager"> <ref local="jtaTransactionManager" /> </property> <property name="transactionAttributes"> <props> <prop key="set*">PROPAGATION_REQUIRED</prop> <prop key="find*">PROPAGATION_REQUIRED,readOnly</prop> </props> </property> <property name="target"> <ref bean="companyManageTarget" /> </property> </bean> <!—配置struts访问,把service层注入到action里面--> <bean name="/company" class="com.vstsoft.querycompany.web.action.CompanyAction" singleton="false"> <property name="companyManage"> <ref local="companyManageProxy" /> </property> </bean>
例如:在service层的接口实现CompanyManageImpl里面有个setData方法:按顺序执行对数据库的数据查询,数据删除,数据插入数据库,如果哪一步出异常(运行时异常),以上三个操作都将事务回滚。
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