Integration example of Spring and BlazeDS with Maven2.

Multiproject EAR:
- Flex 4
- Spring 3
- BlazeDS 3

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Technology:
- Flex-Cairngorm
- J2EE-Blazeds-Spring-Hibernate
- MySQL

Go to he game

Spring can provide DAO’s beans through three strategies:

1. Inject DAO’s as properties in service bean of applicationContext.xml

   <bean id="myDao" class="app.dao.MyDaoImpl">
   	<property name="sessionFactory">
   		<ref local="sessionFactory" />
   	</property>
   </bean>
   <bean id="myService" class="app.service.myService">
   	<property name="dao" ref="myDao"/>
   </bean>

   Define servies properties

   private IMyDao dao;
   public IMyDao getDao() {
   	return dao;
   }
   public void setDao(IMyDao dao) {
   	this.dao = dao;
   }

2. Create a factory (as a Singleton) that provide DAO instances whereever it was needed:

   Factory implementation:

   package app.dao;
   
   public class MyDaoFactory {
   	private static MyDaoFactory instance;
   	private IMyDao instanceDAO;
   
      public static MyDaoFactory getInstance() {
          if (instance == null) {
           	instance = new MyDaoFactory();
          }
          return instance;
      }
   
      public IMyDao getInstanceDAO() {
   		return getInstance().instanceDAO;
   	}
   
   	public void setInstanceDAO(IMyDao instanceDAO) {
   		this.instanceDAO = instanceDAO;
   	}
   }

   ApplicationContext declaration (inject DAO on the factory):

   <bean id="myDao" class="app.dao.MyDaoImpl">
   	<property name="sessionFactory">
   		<ref local="sessionFactory" />
   	</property>
   </bean>
   <bean id="myDaoFactory" class="app.dao.MyDaoFactory">
   	<property name="instanceDAO">
   		<ref local="myDao"/>
   	</property>
   </bean>

   Use it in the service:

   IMyDao myDao=MyDaoFactory.getInstance().getInstanceDAO();

3. Use the BeanFactory of Spring:

   ApplicationContext ctx = new ClassPathXmlApplicationContext(
   	new String[] { "applicationContext.xml" });
   	IMyDao myDao = (IMyDao) ctx.getBean("myDao");

Application example with Flex, BlazeDS and Spring. On this configuration you must notice on SpringFactory which provide beans of Spring to BlazeDS.

Flex Cient
Must be changed with the project url path on following files:

• Main-config.xml
• .actionScriptProperties
• .flexProperties
• .project

Servidor
build.properties must be configured with local parameters.
Project don’t include following necessary libraries(provided with spring and blazeds):

aspectjrt.jar, aspectjweaver.jar, backport-util-concurrent.jar, cfgatewayadapter.jar, commons-codec-1.3.jar, commons-dbcp.jar, commons-httpclient-3.0.1.jar, commons-logging.jar, commons-pool.jar, concurrent.jar, flex-messaging-common.jar, flex-messaging-core.jar, flex-messaging-opt.jar, flex-messaging-proxy.jar, flex-messaging-remoting.jar, hsqldb.jar, servlet-api.jar, spring.jar, standard.jar y xalan.jar.

To deploy the project:

1. Launch server HSQLDB through file server.bat (windows) or server.sh (unix)
2. Create and load database with build.xml
3. Start server and try flex application