Spring notes

Difference between struts and Spring

Struts	Spring
web framework	application framework
not layered framework	layered framework
heavy weight framework	Light weight framework
Support tag lib.	Does not support tag lib.
Provide manually code to integrate with ORM	xml configuration required
AOP,IOC not available	AOP,IOC available

How do u integrate struts with spring

   1)  include the "struts2-spring-plugin.jar” library into your project classpath.

             <dependency>

                    <groupId>org.apache.struts</groupId>

                    <artifactId>struts2-spring-plugin</artifactId>

                    <version>2.1.8</version>

             </dependency>

 2)     Configure the Spring listener “org.springframework.web.context.ContextLoaderListener” in web.xml file.

           <listener>

                   <listener-class>

                        org.springframework.web.context.ContextLoaderListener

                   </listener-class>

           </listener>

3)      Register all the Spring’s Beans in the applicationContext.xml file, the Spring listener will locate this xml file automatically.

       <bean id="msgBean" class="example.Success" >

           <property name="message" value="welcome to student DB"></property>

       </bean>

4)Struts.xml

                                <action name="showHomePage" class="msgBean">

                                                <result>/example/Login.jsp</result>

                                </action>

How to handle transaction management in Spring?

ApplicationContext.xml

<bean id="ds" class="org.sf.jdbc.datasource.DriverManagerDataSource">

                <property name="driverClassName" value="com.mysql.jdbc.Driver">

                <property name="url" value=""/>

                <property name="username" value=""/>

                <property name="password" value=""/>

</bean>

<bean id=”sessionFactory” class=”org.sf.orm.hibernate3.LocalSessionFactoryBean”>

                <property name=”dataSource” ref=”ds”/>

                <property name=”mappingResources”>

                                <list>

                                         <value>Account.hbm.xml</value>

                                </list>

                </property>

                <property name=”hibernateProperties”        >

                                <props>

                                         <prop key=”hibernate.dialect”>OracleDialect</prop>

                                         <prop key=”show_sql”>true</prop>

                                </props>

                </property>

</bean>

<bean id="hibernateTemp" class="org.sf.orm.Hibernate3.HibernateTemplate" autowire="constructor"/>

<bean id="accounServiceProxy" class="org.sf.tx.interceptor.TransactionProxyFactoryBean">

                <property name="transactionManager" ref="txManager">

                 <property name="target" ref="accountServiceTarget">

                 <property name="transactionAttributes">

                      <props>

                          <prop key="addAccount*">PROPGATION_REQUIRED</prop>

                          <prop key="deposite*">PROPGATION_REQUIRED</prop>

                          <prop key="transferFunds*">PROPGATION_REQUIRES_NEW</prop>

                       </props>

                  </property>

</bean>

<bean id=”txManager” class=”org.sf.orm.hibernate3.HibernateTransactionManager” autowire=”constructor”/>

<bean id="accountServiceTarget" class="AccountServiceImpl"/>

<bean id="accountDAO" class="AccountDAOImpl"/>

[Note: hibernateTemp internally will use sessionFactory]

               

AccountDAOImpl.java

Public class AccountDAOImpl implements AccountDAO{

                @Autowired

                HibernateTemplate hibernateTemp;

                Public void addAccount(Account acc){

       hibernateTemp.save(acc);

}

}

AccountServiceImpl.java

Public class AccountServiceImpl implements AccountService{

                @Autowired

                Private AccountDAO accountDAO;

                //getters and setters of accountDAO

                Public void addAccount(Account acc){

       accountDAO.addAccount(acc);

}

}

Client.java

                AccountService accService = (AccountService)ctx.getBean("accountServiceProxy");

                accService.addAccount(acc1);