Flex學習之五

本文主要學習Flex跟spring如何集成。參考文檔是 Spring BlazeDS Integration Reference Guide。spring已經提供了與flex的集成的支持，主要的jar包下載地址：http://www.springsource.com /download/community?project=Spring%20BlazeDS%20Integration

flex與spring集成的核心思想就是讓spring來管理 MessageBroker。如何集成？可以總結為三步。
1、首先，修改 web.xml文件，將之前配置的 MessageBrokerServlet  去掉改成spring的，

<servlet>
<servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/config/web-application-config.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
<url-pattern>/messagebroker/*</url-pattern>
</servlet-mapping>

2，新建文件 web-application-config.xml

<?xml version="1.0" encoding="GB2312" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:flex="http://www.springframework.org/schema/flex" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
           http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/flex
           http://www.springframework.org/schema/flex/spring-flex-1.0.xsd">

<!-- Bootstraps and exposes the BlazeDS MessageBroker simplest form -->
<flex:message-broker id="_messageBroker"
services-config-path="/WEB-INF/flex/services-config.xml">
<flex:mapping pattern="/messagebroker/*" />
<flex:exception-translator ref="myExceptionTranslator" />
</flex:message-broker>
       
         <!--
          上面配置是一種簡單配置，另外一種更簡單配置為：
           <flex:message-broker/> 
         
           還有一種配置為：
           <bean id="mySpringManagedMessageBroker"
class="org.springframework.flex.core.MessageBrokerFactoryBean">
<property name="servicesConfigPath"
value="classpath*:flex/services-config.xml" />
            </bean>
          -->

<!-- Maps request paths at /* to the BlazeDS MessageBroker -->
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<value>
/*=_messageBroker
        </value>
</property>
</bean>

        <!-- 下面這個Adapter似乎不用配置，因為我注釋后照樣可以使用 -->
<!--
Dispatches requests mapped to a MessageBroker <bean
class="org.springframework.flex.servlet.MessageBrokerHandlerAdapter"
/>
-->

</beans>

3，寫remoting-config.xml 文件：
<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service"
    class="flex.messaging.services.RemotingService">

    <adapters>
        <adapter-definition id="java-object"
            class="flex.messaging.services.remoting.adapters.JavaAdapter"
            default="true"/>
    </adapters>

    <default-channels>
        <channel ref="my-amf"/>
    </default-channels>
   
</service>   
   
到目前為止，flex已經跟spring集成到一起了。
4、將spring的bean導出為flex的Destination。我們要在web-application-config.xml文件中增加。
有三種方式：
第一種：
         <bean id="productService" class="flex.samples.product.ProductServiceImpl" />
          <flex:remoting-destination ref="productService" />
第二種：
        <bean id="productService" class="flex.samples.product.ProductServiceImpl" >
          <flex:remoting-destination />
        </bean>
第三種：
        <bean id="product" class="org.springframework.flex.remoting.RemotingDestinationExporter">
    <property name="messageBroker" ref="_messageBroker"/>
    <property name="service" ref="productService"/>
    <property name="serviceId" value="productService"/>
    <property name="includeMethods" value="read, update"/>
    <property name="excludeMethods" value="create, delete"/>
    <property name="channels" value="my-amf, my-secure-amf"/>
</bean>


附件是一個例子工程，沒有提供jar，工程中所需要的jar
backport-util-concurrent.jar
cfgatewayadapter.jar
cglib-nodep-2.1_3.jar
commons-codec-1.3.jar
commons-httpclient-3.0.1.jar
commons-logging.jar
concurrent.jar
flex-messaging-common.jar
flex-messaging-core.jar
flex-messaging-opt.jar
flex-messaging-proxy.jar
flex-messaging-remoting.jar
jackson-lgpl-0.9.5.jar
org.springframework.flex-1.0.0.RC1.jar
spring2.5.6.jar
spring-webmvc.jar
xalan.jar