So, my problem is : All my project is (well ?) configured but I don’t have lazy loading !
This a sample project I’m making to prepare the real project coming just after.
In simple words, I have 3 tables : Category, Product, Client, and the association between the last two, Buy.
On the Flex side I have two simple datagrid, the first one contains the products, and the second one contains the clients associated with the selected product.
On the server side a Spring-BlazeDS-Integration architecture and a service which retrieves all the products.
My config files :
web.xml
enter code here
<web-app>
<display-name>Spring BlazeDS Integration</display-name>
<description>Spring BlazeDS Integration</description>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/classes/log4j.properties</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/applicationContext.xml</param-value>
</context-param>
<filter>
<filter-name>openSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
<init-param>
<param-name>flushMode</param-name>
<param-value>ALWAYS</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>openSessionInViewFilter</filter-name>
<url-pattern>/messagebroker/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>Spring MVC Servlet Dispatcher</servlet-name>
<display-name>Spring MVC Servlet Dispatcher</display-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/webApplicationContext.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>RDSDispatchServlet</servlet-name>
<servlet-class>flex.rds.server.servlet.FrontEndServlet</servlet-class>
<init-param>
<param-name>messageBrokerId</param-name>
<param-value>_messageBroker</param-value>
</init-param>
<init-param>
<param-name>useAppserverSecurity</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>10</load-on-startup>
</servlet>
<servlet-mapping id="RDS_DISPATCH_MAPPING">
<servlet-name>RDSDispatchServlet</servlet-name>
<url-pattern>/CFIDE/main/ide.cfm</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Spring MVC Servlet Dispatcher</servlet-name>
<url-pattern>/messagebroker/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
</web-app>
applicationContext.xml
<beans xmlns="..">
<bean id="transactionProxy" abstract="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager" ref="txManager" />
<property name="transactionAttributes">
<props>
<prop key="create*">PROPAGATION_REQUIRED</prop>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
<prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
</props>
</property>
</bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="mappingResources">
<list>
<value>tuto/Product.hbm.xml</value>
<value>tuto/Client.hbm.xml</value>
<value>tuto/Category.hbm.xml</value>
<value>tuto/Buy.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
<property name="dataSource"><ref bean="dataSource"/></property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/tuto" />
<property name="username" value="root" />
</bean>
</beans>
webApplicationContext.xml
<beans xmlns=".....">
<bean id="hibernate-lazy-adapter" class="org.springframework.flex.core.ManageableComponentFactoryBean">
<constructor-arg value="net.digitalprimates.persistence.hibernate.HibernateAdapter"/>
<property name="properties">
<value>
{
"hibernate": {
"sessionFactory": {"class":"net.digitalprimates.persistence.hibernate.utils.SpringSessionUtil", "getCurrentSessionMethod":"getCurrentSession"
}, "loadMethod":"load"
}
}
</value>
</property>
</bean>
<flex:message-broker>
<flex:remoting-service default-adapter-id="hibernate-lazy-adapter" default-channels="my-amf" />
</flex:message-broker>
<bean id="productService" parent="transactionProxy">
<property name="target">
<bean class="tuto.ServiceProductImpl">
<property name="productDAO"><ref bean="productDAO"/></property>
</bean>
</property>
<flex:remoting-destination/>
</bean>
<bean id="productDAO" class="tuto.DAOProductHibernate" lazy-init="default">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
</beans>
product.hbm.xml
<hibernate-mapping package="tuto">
<class name="Product" table="product">
<id name="productId" type="long" column="product_id">
<generator class="increment"/>
</id>
<property name="name" column="name" type="string" not-null="true" length="40"/>
<many-to-one name="category" column="category_id" class="Category" not-null="true" lazy="false">
</many-to-one>
<set name="clients" table="buy" cascade="delete">
<key column="product_id"/>
<many-to-many column="client_id" class="Client"/>
</set>
</class>
</hibernate-mapping>
And here’s the code in ProductDAO.java
public Collection<Product> findAll() {
Session session = SessionFactoryUtils.getSession(getSessionFactory(), false);
try {
return session.createQuery("from Product").list();
} catch (HibernateException e) {
throw SessionFactoryUtils.convertHibernateAccessException(e);
}
}
If you need more information to help, please ask, I just didn’t want to post to much code in the first message 🙂
So as you can see I just retrieve the products from the database, but when I select a product in the datagrid, the client’s datagrid is populated, so the Clients are loaded too !
Plus, I have a log trace and I can see there is more than one request on the Product table, there’s also several on the Client table.
In my opinion only one should be here ! No ?!
I’m waiting for your suggestion, thanks a lot !
Arnaud.
Problem solved !
Change this :
to this :
And in all the beans, change this :
to this :
Now it works 🙂