关于 google app 上部署flex 应用 实践 和一些问题

用到的相关组件

 

spring-flex-1.0.1.RELEASE.zip lib下所有包

blazeds_bin_3-0-0-544.zip  lib下所有包

jackson-core-asl-1.0.1.jar

 

spring-flex-1.0.1.RELEASE.zip 依赖spring-core.jar 和 spring-webmvc.jar   jackson-core-asl-1.0.1.jar

 

其它jar是google app 工程自带<!--StartFragment -->

 

 

首先web.xml

 

因为用到spring 所以把blazeds的默认设置改了。详细请看spring-flex-1.0.1.RELEASE.zip 中文档

 

<welcome-file-list>
  <welcome-file>myblog.html</welcome-file>
 </welcome-file-list>
 

    <!-- Http Flex Session attribute and binding listener support -->
<!--    <listener>-->
<!--        <listener-class>flex.messaging.HttpFlexSession</listener-class>-->
<!--    </listener>-->

    <!-- MessageBroker Servlet -->
<!--    <servlet>-->
<!--        <servlet-name>MessageBrokerServlet</servlet-name>-->
<!--        <servlet-class>flex.messaging.MessageBrokerServlet</servlet-class>-->
<!--        <init-param>-->
<!--            <param-name>services.configuration.file</param-name>-->
<!--            <param-value>/WEB-INF/flex/services-config.xml</param-value>-->
<!--       </init-param>-->
<!--        <load-on-startup>1</load-on-startup>-->
<!--    </servlet>-->

<!--    <servlet-mapping>-->
<!--        <servlet-name>MessageBrokerServlet</servlet-name>-->
<!--        <url-pattern>/messagebroker/*</url-pattern>-->
<!--    </servlet-mapping>-->

    <!-- for WebSphere deployment, please uncomment -->
    <!--
    <resource-ref>
        <description>Flex Messaging WorkManager</description>
        <res-ref-name>wm/MessagingWorkManager</res-ref-name>
        <res-type>com.ibm.websphere.asynchbeans.WorkManager</res-type>
        <res-auth>Container</res-auth>
        <res-sharing-scope>Shareable</res-sharing-scope>
    </resource-ref>
    -->
   
    <servlet>
  <servlet-name>SpringDispatcherServlet</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>SpringDispatcherServlet</servlet-name>
        <url-pattern>/messagebroker/*</url-pattern>
    </servlet-mapping>
  

 

web-application-config.xml 配置

<!--_messageBroker 这个名字是写死的。这都是官方文档的配置。我试着改名。里边某处好像用到这个服务名会报错。具体情况没去研究-->

<bean id="_messageBroker" class="org.springframework.flex.core.MessageBrokerFactoryBean" >
<!--  <property name="servicesConfigPath" value="classpath*:services-config.xml" />-->
 </bean>
 
 <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
     <property name="mappings">
         <value>/*=_messageBroker</value>
     </property>
 </bean>
 
 <bean class="org.springframework.flex.servlet.MessageBrokerHandlerAdapter"/>   
 
 <!-- 方法一-->
<!-- <bean id="user" class="org.springframework.flex.remoting.FlexRemotingServiceExporter">-->
<!--  <property name="messageBroker" ref="mySpringManagedMessageBroker"/>-->
<!--  <property name="service" ref="userService"/>-->
<!-- </bean>-->
<!-- 方法二-->
<!-- <bean id="userService" class="com.UserServiceImpl">-->
<!--  <flex:remoting-destination /> -->
<!-- </bean>-->
 <!-- 方法三-->
 <bean id="userService" class="com.UserServiceImpl"/>
 <flex:remoting-destination ref = "userService"/>

 

<!--方法一二三是指三指将服务暴露方式   原始的是在remote-config.xml中配置 spring-flex提供三种方式不需要改remote-config.xml-->

 

</beans>

 

 

请注意。整合的过程中感到几个莫名的问题

 

2009-12-13 17:03:03 com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /favicon.ico
2009-12-13 17:03:04 com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: Nested in org.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.RuntimeException: Session support is not enabled in appengine-web.xml.  To enable sessions, put <sessions-enabled>true</sessions-enabled> in that file.  Without it, getSession() is allowed, but manipulation of sessionattributes is not.:
java.lang.RuntimeException: Session support is not enabled in appengine-web.xml.  To enable sessions, put <sessions-enabled>true</sessions-enabled> in that file.  Without it, getSession() is allowed, but manipulation of sessionattributes is not.
 at com.google.apphosting.utils.jetty.StubSessionManager$StubSession.throwException(StubSessionManager.java:67)
 at com.google.apphosting.utils.jetty.StubSessionManager$StubSession.setAttribute(StubSessionManager.java:63)

 

根据异常信息

在appengine-web.xml 配置中加上<sessions-enabled>true</sessions-enabled> 解决

 

 

org.springframework.beans.factory.BeanCreationException: Error creating bean with name '_messageBroker' defined in ServletContext resource [/WEB-INF/config/web-application-config.xml]: Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanInitializationException: MessageBroker initialization failed; nested exception is java.lang.NoClassDefFoundError: java.lang.management.ManagementFactory is a restricted class. Please see the Google  App Engine developer's guide for more details.
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1338)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:473)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
 at java.security.AccessController.doPrivileged(Native Method)
 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
 at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)

 

nested exception is java.lang.NoClassDefFoundError: java.lang.management.ManagementFactory is a restricted class  此类好像是在google java 白名单之外  有网在找到相应解决方案

services-config.xml <system>下加入<manageable>false</manageable>

 

 <system>
     <manageable>false</manageable>
        <redeploy>
            <enabled>false</enabled>
            <!--
            <watch-interval>20</watch-interval>
            <watch-file>{context.root}/WEB-INF/flex/services-config.xml</watch-file>
            <watch-file>{context.root}/WEB-INF/flex/proxy-config.xml</watch-file>
            <watch-file>{context.root}/WEB-INF/flex/remoting-config.xml</watch-file>
            <watch-file>{context.root}/WEB-INF/flex/messaging-config.xml</watch-file>
            <watch-file>{context.root}/WEB-INF/flex/data-management-config.xml</watch-file>
            <touch-file>{context.root}/WEB-INF/web.xml</touch-file>
             -->
        </redeploy>
    </system>

 

 

 问题3:在本地一直调试成功。部署到google app 报

Fault Code : Server.Processing.DuplicateSessionDetected.

Error Message : Detected duplicate HTTP-based FlexSessions, generally due to the remote host disabling session cookies. Session cookies must be enabled to manage the client connection correctly.

 

问题有点闷:在这外链接上找到了解决方案 But, my suggession if you are not really concern with BlazeDS version, roll back to BlazeDS 3.0.0.544    将blazeds换成3.0  之前一直用3.2 部署有问题

http://iamsri.wordpress.com/2009/11/09/flex-tip-server-processing-duplicatesessiondetected/

 

至此问题全部解决  flex-spring 本人e文不大好。看spring-flex 文档有吃力。

 

 

忘记贴上前台代码了:

 

<mx:Script>
  <![CDATA[
   import mx.collections.ArrayCollection;
   import mx.rpc.events.ResultEvent;

   private function getUserList():void
   {
    RemoteService.execute("userService", "getUserList", [], resultUserList);
   }

   [Bindable]
   private var obj:Object = new Object();
   private function resultUserList(event:ResultEvent):void
   {
    var userList:ArrayCollection=event.result as ArrayCollection;
    obj = userList[0];
   }
   
      ]]>
 </mx:Script>

 <mx:TextArea id="ggg" x="109" y="122" text="{obj.id}"/>
 <mx:Button label="click" click="getUserList();" x="144" y="193"/>

 

RemoteService.as

 

package
{
 import mx.controls.Alert;
 import mx.messaging.Channel;
 import mx.messaging.ChannelSet;
 import mx.messaging.channels.AMFChannel;
 import mx.rpc.AbstractOperation;
 import mx.rpc.events.FaultEvent;
 import mx.rpc.events.ResultEvent;
 import mx.rpc.remoting.RemoteObject;
 
 
 public class RemoteService
 {
  public function RemoteService()
  {
  }
  private static var result:Object;
  public static function execute(serviceName:String,methodName:String,param:Array,resultHandler:Function=null,faultHandler:Function=null):void{
   var remote:RemoteObject = new RemoteObject();
   remote.destination = serviceName;
   var channelSet:ChannelSet = new ChannelSet();
   var chan:Channel = new AMFChannel(null,"/messagebroker/amf");
   channelSet.addChannel(chan);
   remote.channelSet = channelSet;
   var operator:AbstractOperation = remote.getOperation(methodName);
   var resultFun:Function = resultHandler == null?autoResultHandler:resultHandler;
   var faultFun:Function = faultHandler == null?autoFaultHandler:faultHandler;
   
   remote.addEventListener(FaultEvent.FAULT,faultFun); 
   remote.addEventListener(ResultEvent.RESULT,resultFun); 
   operator.arguments = param;
   operator.send(); 
  }
  
  private static function autoResultHandler(event:ResultEvent):void{
   result = event.result as Object;
  }
  
  private static function autoFaultHandler(event:FaultEvent):void{
   Alert.show(event.message.toString());
  }
 }
}

 

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