I'll give that a try, thanks.
Paul Benedict wrote:
Adam,
I have never seen anyone attach Spring transactional logic to an
action, and called DAOs straight from the action. That's not good
practice, because it mashes web, business, and data layers all in one
place.
I wouldn't blame struts here (yet). I'd first move your code into a
service object and then inject the service into the action. If there
really is a problem with Struts, then the problem will persist (pun
intended); but when you move them to the service layer, it will
indicate whether you have mis-configured Spring or if Struts is at fault.
Paul
Adam Ruggles wrote:
I am following the guide here
http://cwiki.apache.org/S2WIKI/struts-2-spring-2-jpa-ajax.html
For some reason when trying to map a method other than execute I
recieve the following error:
- Servlet.service() for servlet default threw exception
java.lang.NoSuchMethodException: $Proxy18.find()
Below are the configuration files and a segment of the UserAction class.
struts.xml:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd";>
<struts>
<constant name="struts.objectFactory" value="spring" />
<!-- <constant name="struts.devMode" value="true" /> -->
<include file="struts-default.xml"/>
<package name="havoc" extends="struts-default">
<action name="list" class="userAction" method="execute">
<result name="success">/WEB-INF/pages/list.jsp</result>
</action>
<action name="save" class="userAction" method="save">
<result name="success" type="redirect">/list.action</result>
</action>
<action name="find" class="userAction" method="find">
<result name="success">/WEB-INF/pages/index.jsp</result>
</action>
</package>
</struts>
Application Context
<?xml version="1.0" encoding="UTF-8"?>
<beans default-autowire="byName"
xmlns="http://www.springframework.org/schema/beans";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:aop="http://www.springframework.org/schema/aop";
xmlns:tx="http://www.springframework.org/schema/tx";
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.0.xsd";>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
autowire="no">
<property name="location" value="/WEB-INF/havoc.properties"/>
</bean>
<bean id="config" class="com.havoc.forum.util.Config" autowire="no">
<property name="location" value="/WEB-INF/havoc.properties"/>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- This will cause spring to return the raw SessionFactory
instead of the spring proxied one. -->
<!-- <property name="exposeTransactionAwareSessionFactory"
value="false" /> -->
<property name="configurationClass"
value="org.hibernate.cfg.AnnotationConfiguration"/>
<property name="configLocation"
value="classpath:hibernate.cfg.xml"/> <property
name="hibernateProperties">
<props>
<prop
key="hibernate.dialect">${hibernate.dialect}</prop>
<prop
key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>
<prop
key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop
key="hibernate.bytecode.use_reflection_optimizer">${hibernate.bytecode.use_reflection_optimizer}</prop>
<prop
key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>
<prop
key="hibernate.cache.provider_class">${hibernate.cache.provider_class}</prop>
<prop
key="hibernate.current_session_context_class">thread</prop>
<prop
key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
</props>
</property> </bean>
<!--
Instruct Spring to perform declarative transaction management
automatically
on annotated classes.
-->
<tx:annotation-driven transaction-manager="transactionManager" />
<!-- Transaction manager for a single Hibernate SessionFactory
(alternative to JTA) -->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory"><ref
bean="sessionFactory"/></property>
</bean>
<!-- Model Objects -->
<bean id="user" class="com.havoc.forum.model.User" />
<bean id="group" class="com.havoc.forum.model.Group" />
<bean id="rank" class="com.havoc.forum.model.Rank" />
<!-- Data Access Objects -->
<bean id="userDAO" class="com.havoc.forum.dao.hibernate.UserDAO" />
<bean id="groupDAO" class="com.havoc.forum.dao.hibernate.GroupDAO" />
<bean id="rankDAO" class="com.havoc.forum.dao.hibernate.RankDAO" />
<!-- Actions -->
<bean id="userAction" class="com.havoc.forum.action.UserAction"
scope="prototype" />
</beans>
UserAction
public class UserAction extends ActionSupport {
...
...
/**
* Returns a user from the database or a new user.
* @return SUCCESS or ERROR.
* @throws Exception if an error occurs.
*/
@Transactional(readOnly = true, propagation =
Propagation.REQUIRED, rollbackFor = PersistenceException.class)
public String find() {
if (user != null && user.getId() != null) {
user = userDAO.find(user.getId());
return SUCCESS;
}
user = new User();
return SUCCESS;
}
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