blazeds, spring3整合实现RPC服务和消息服务

环境:

  MyEclipse 7.5

  Flash Builder 4 plugin for eclipse

  Tomcat 6

  BlazeDS 4.0.0

  springframework 3.0.3

  Spring-flex整合 org.springframework.flex-1.0.3.RELEASE.jar (适用于spring2.5.6+,blazeds3.2+)

步骤:

  1. 创建带有Flex支持的Web工程,通过J2EE Web工程添加Flex项目,进行BlazeDS开发

  2. 导入spring包和spring-flex集成包。

  3. 配置web.xml,配置DispatcherServlet,使用spring进行管理,并将请求映射到MessageBroker。

  4. 创建web-application-config.xml,配置flex服务,主要是在spring中配置MessageBroker。

  5. 创建remoting-destination和 message-destination,修改channel属性。

  6. 创建mxml文件,定义channelSet,注册remote-object和定义Productor, Consumer.

注意:

  当不使用spring直接配置blazeDS实现RPC和消息服务时,仅需要在remoting-config.xml和messaging-config.xml中配置destination,只要在这些文件中配置了默认通道,mxml文件中不需要再定义channelSet即可执行。而使用spirng时,仅当将default-channels定义在services-config.xml的services标签中才有效,若在services-config.xml的services标签中加载其他配置文件,在这些文件中配置各自的default-channels,会报如下错误:[MessagingError message='×××'artgallerydataservice' either does not exist or the destination has no channels defined (and the application does not define any default channels.)'],原因是没有找到通道。如果仅将通道定义在<flex:message-destination>或<flex:remoting-destination>中,也会出现同样的情况。

  对于以上的两个问题,我觉得几乎不可理解,解决方案是在mxml文件中定义channelSet以找到amf通道。

项目代码: 

  目录结构: 

   

   Web.xml:

web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
    xmlns
="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi
="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation
="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
>
    
    
<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/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>
    
  
<welcome-file-list>
    
<welcome-file>index.jsp</welcome-file>
  
</welcome-file-list>
</web-app>

  web-application-config.xml: 

    <flex:message-broker/>是非常重要的,它还有其它的几种表示方法,但以这种最为简单,它通过MessageBrokerHandlerAdapter和HandlerMapping将请求发送给spring管理的MessageBroker。

    注意这里一定要导入spring-flex集成的schemaLocation,remoting-destination和 message-destination也在这里定义。

 web-application-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<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">

    
<flex:message-broker/>

    
<flex:message-destination id="msg_dest"/>
    
<bean id="flex_test" class="test.Test">
        
<flex:remoting-destination/>
    
</bean>
</beans>

  services-config.xml: 

     这里最重要的是channels的定义和配置。

 services-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<services-config>

    
<services>
      
<default-channels>
        
<channel ref="my-amf"/>
      
</default-channels>
    
</services>

    
<security>
        
<login-command class="flex.messaging.security.TomcatLoginCommand" server="Tomcat"/>
        
<!-- Uncomment the correct app server
        <login-command class="flex.messaging.security.TomcatLoginCommand" server="JBoss">
        <login-command class="flex.messaging.security.JRunLoginCommand" server="JRun"/>        
        <login-command class="flex.messaging.security.WeblogicLoginCommand" server="Weblogic"/>
        <login-command class="flex.messaging.security.WebSphereLoginCommand" server="WebSphere"/>
        
-->

        
<!-- 
        <security-constraint id="basic-read-access">
            <auth-method>Basic</auth-method>
            <roles>
                <role>guests</role>
                <role>accountants</role>
                <role>employees</role>
                <role>managers</role>
            </roles>
        </security-constraint>
         
-->
    
</security>

    
<channels>

        
<channel-definition id="my-amf" class="mx.messaging.channels.AMFChannel">
            
<endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/amf" class="flex.messaging.endpoints.AMFEndpoint"/>
        
</channel-definition>

        
<channel-definition id="my-secure-amf" class="mx.messaging.channels.SecureAMFChannel">
            
<endpoint url="https://{server.name}:{server.port}/{context.root}/messagebroker/amfsecure" class="flex.messaging.endpoints.SecureAMFEndpoint"/>
            
<properties>
                
<add-no-cache-headers>false</add-no-cache-headers>
            
</properties>
        
</channel-definition>

        
<channel-definition id="my-polling-amf" class="mx.messaging.channels.AMFChannel">
            
<endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/amfpolling" class="flex.messaging.endpoints.AMFEndpoint"/>
            
<properties>
                
<polling-enabled>true</polling-enabled>
                
<polling-interval-seconds>1</polling-interval-seconds>
            
</properties>
        
</channel-definition>

        
<!--
        <channel-definition id="my-http" class="mx.messaging.channels.HTTPChannel">
            <endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/http" class="flex.messaging.endpoints.HTTPEndpoint"/>
        </channel-definition>

        <channel-definition id="my-secure-http" class="mx.messaging.channels.SecureHTTPChannel">
            <endpoint url="https://{server.name}:{server.port}/{context.root}/messagebroker/httpsecure" class="flex.messaging.endpoints.SecureHTTPEndpoint"/>
            <properties>
                <add-no-cache-headers>false</add-no-cache-headers>
            </properties>
        </channel-definition>
        
-->
    
</channels>

    
<logging>
        
<target class="flex.messaging.log.ConsoleTarget" level="Error">
            
<properties>
                
<prefix>[BlazeDS] </prefix>
                
<includeDate>false</includeDate>
                
<includeTime>false</includeTime>
                
<includeLevel>false</includeLevel>
                
<includeCategory>false</includeCategory>
            
</properties>
            
<filters>
                
<pattern>Endpoint.*</pattern>
                
<pattern>Service.*</pattern>
                
<pattern>Configuration</pattern>
            
</filters>
        
</target>
    
</logging>

    
<system>
        
<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>

</services-config>

  messaging-config.xml, proxy-config.xml, remoting-config.xml:

    略。和blazeDS提供的几乎一样。 

 

   test.Test.java:

    这里只定义了一个方法,用以测试远程方法调用。

package test;

public class Test {

    
public void done(){
        System.out.println(
"OK.");
    }
}

   flex_test.mxml: 

    这个不做过多解释。 这里定义了AMFChannel和ChannelSet,避免找不到通道的问题。Productor和Consumer是实现BlazeDS消息服务的两个组件,AsyncMessage是用来发送消息的。

flex_test.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s
="library://ns.adobe.com/flex/spark" 
               xmlns:mx
="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600"
               creationComplete
="consumer.subscribe();">
    
    
<fx:Script>
        
<![CDATA[
            import mx.controls.Alert;
            import mx.messaging.messages.*;
            import mx.messaging.events.*;
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;
            
            // Write received message to TextArea control.
            private function messageHandler(event: MessageEvent):void {
            ta.text += event.message.body + "\n";
            }
            
            // Compose the message as an instance of AsyncMessage, 
            // then use the Producer.send() method to send it.
            private function sendMessage():void {
                var message: AsyncMessage = new AsyncMessage();
                message.body = userName.text + ": " + msg.text;
                producer.send(message);
                msg.text = "";
            }
            
            protected function button_clickHandler(event:MouseEvent):void
            {
                // TODO Auto-generated method stub
                object.done();
            }
            
            protected function resulth(event:ResultEvent):void
            {
                label.text="succeed!";
            }
            
            protected function faulth(event:FaultEvent):void
            {
                label.text="failed!";
                Alert.show("远程对象调用失败:\n"+event.fault);
            }
            
        
]]>
    
</fx:Script>
    
    
<fx:Declarations>
        
<!-- 将非可视元素(例如服务、值对象)放在此处 -->
        
<mx:AMFChannel id="polling_amf" url="../messagebroker/amfpolling" />
        
<mx:ChannelSet id="polling_channel" channels="{[polling_amf]}" />
        
<mx:AMFChannel id="amf" url="../messagebroker/amf" />
        
<mx:ChannelSet id="amf_channel" channels="{[amf]}" />
        
        
<mx:Producer id="producer" destination="msg_dest" channelSet="{polling_channel}"/>
        
<mx:Consumer id="consumer" destination="msg_dest" channelSet="{polling_channel}"
                     message
="messageHandler(event)"/>
        
        
<mx:RemoteObject id="object" destination="flex_test" 
                         channelSet
="{amf_channel}" 
                         result
="resulth(event);" fault="faulth(event);" />
        
    
</fx:Declarations>
    
<s:TextArea x="42" y="56" width="289" height="163" id="ta"/>
    
<s:Label x="42" y="244" text="User Name"/>
    
<s:Label x="43" y="272" text="Message"/>
    
<s:TextInput x="120" y="237" width="128" id="userName"/>
    
<s:TextInput x="120" y="267" id="msg"/>
    
<s:Button x="261" y="237" label="Send" height="52" click="sendMessage();"/>
    
<s:Label x="42" y="26" text="Message Content"/>
    
<mx:VRule x="411" y="26" height="263"/>
    
<s:Button x="468" y="54" label="RPC Service Test" width="148" height="39" id="button" click="button_clickHandler(event)"/>
    
<s:Label y="140" text="Guess the Result!" verticalAlign="middle" textAlign="center" width="177" height="79" x="456" id="label"/>
</s:Application>

  执行结果:

  

原文地址:https://www.cnblogs.com/noam/p/1793504.html