2. Agenda for this season
What is Spring?
Why Spring with Flex?
Why Spring BlazeDS Integration?
What is & Why Cairngorm UM?
What is & why generic DAO?
What is & Why CairnSpring?
3. WHAT IS SPRING?
The result is looser coupling between
components. The Spring IoC container has
proven to be a solid foundation for
building robust enterprise applications.
`
The components managed by the Spring IoC
container are called Spring beans.
4. WHAT IS SPRING?
The Spring framework includes several other
modules in addition to its core IoC
container.
http://www.springframework.org.
5. WHY WE NEED FLEX ACCESS
SPRING?
In scenario of the Remoting and Data
Management Services approaches:
It enable the tightest integration with
Spring. There is no need to transform
data, or to expose services in a certain
way: the Flex application works directly
with the beans registered in the Spring IoC
container.
6. WHY WE NEED FLEX ACCESS
SPRING?
The BlazeDS Remoting enables binding your
valueobjects with Java pojo Classes easily
by metadata
[RemoteClass(alias=”com.adobe.pojo.ob”]
By using the Spring Security 2.0 we can
make our application secured for
transactions.
7. WHAT is BlazeDS?
BlazeDS provides a set of services that lets you connect
a client-side application to server-side data, and pass
data among multiple clients connected to the server.
BlazeDS implements real-time messaging between
clients.
Browser application
or AIR
.swf
http(s)
domain
blazeds server
External Remote
Services Service
Procedure Messaging
Proxy
Calls
9. SPRING BLAZEDS INTEGRATION
Example:
WEB.XML
Spring BlazeDS Integration servlet
<servlet>
<servlet-name>spring-flex</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/flex-servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
Mapping Spring BlazeDS Integration servlet to handle all requests to '/spring/*
<servlet-mapping>
<servlet-name>spring-flex</servlet-name>
<url-pattern>/spring/*</url-pattern>
</servlet-mapping>
10. SPRING BLAZE DS EXAMPLE
flex-servlet-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:flex="http://www.springframework.org/schema/flex"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/flex
http://www.springframework.org/schema/flex/spring-flex-1.0.xsd">
<context:component-scan base-package="org.springbyexample.web.service" />
<flex:message-broker/> ----Spring BlazeDS Integration configuration of the BlazeDS message broker, which
handles remoting and messaging requests.
<flex:remoting-destination ref="personDao" /> ---Exposes the personDao bean as a BlazeDS remoting destination
</beans>
11. TRADITIONAL BLAZE DS WAY
The BlazeDS configuration first imports the 'remoting-config.xml',The parameters in the URL 'server.name' and
'server.port' are supplied by the Flex runtime. The 'context.root' parameter needs to be supplied during
compilation using the 'context-root' compiler option.
services-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<services-config>
<services>
<service-include file-path="remoting-config.xml" />
<default-channels>
<channel ref="person-amf"/>
</default-channels>
</services>
<channels>
<channel-definition id="person-amf" class="mx.messaging.channels.AMFChannel">
<endpoint url="http://{server.name}:{server.port}/{context.root}/spring/messagebroker/amf"
class="flex.messaging.endpoints.AMFEndpoint"/>
</channel-definition>
</channels>
</services-config>
12. SPRING BLAZEDS INTEGRATION
PersonService.java
@Service
@RemotingDestination
public class PersonService {
private final PersonDao personDao;
/**
* Constructor
*/
@Autowired
public PersonService(PersonDao personDao) {
this.personDao = personDao;
}
public void remove(int id) {
Person person = personDao.findPersonById(id);
personDao.delete(person);
}
}
PersonDeleteCommand.as
var ro:RemoteObject = new RemoteObject("personDao");
ro.remove(id);
ro.addEventListener(ResultEvent.RESULT, updateSearch);
13.
14. Cairngorm with UM Extensions
Universal Mind Cairngorm Extensions
( UM – CGX is easy to migrate from CG)
Event – Business logic combined together
Command logic can be aggregated to
context-specific command classes
(minimizes the number of classes)
Support for easy queue of delegate calls
(SequenceGenerator)
15. Cairngorm with UM Extensions
Create Responder in view
Add responder to event
Cache/Store responder from event to
command
In Command, on success/failure call back
these responders
On view handle success/failure to control
view states
16. Cairngorm with UM Extensions
View Layer Model Layer Control Layer
ModelLocator via IResponder
tcp/ip
via databinding
View Command Delegate Server
via eventdispatching
MVC Classic Usage
View Layer Business Layer
via IResponder via IResponder
tcp/ip
View Command Delegate Server
via eventdispatching
Using View Notifications
17. J2EE – DAO INTRODUCTION
All database access in the system is made
through a DAO to achieve encapsulation.
Each DAO instance is responsible for one
primary domain object or entity. If a
domain object has an independent
lifecycle, it should have its own DAO.
The DAO is responsible for creations,
reads (by primary key), updates, and
deletions -- that is, CRUD -- on the
domain object.
18. generic DAO
For creating a new DAO we need →
a Hibernate mapping file,
a plain old Java interface,
and 10 lines in your Spring configuration
file.
Resource:
http://www.ibm.com/developerworks/java/library/j-
genericdao.html
19. CairnSpring
The CairnSpring includes both Caringorm UM,
Generic DAO along with the Spring BlazeDS
Integration.
It also enables Paging request.
http://www.code.google.com/p/cairnspring
