blazeds使用remote访问

 欢迎交流转载，请注明出处：http://www.cnblogs.com/shizhongtao/p/3487128.html

1.配置及说明

• jar包说明

从官方上下的Blazeds中，默认的配置有四个文件,都在WEB-INF/Flex目录下：services-config.xml、remoting-config.xml、proxy-config.xml、messaging-config.xml。要使用他，首先把lib目录下的jar包拷贝到你自己创建的web项目中去，当然你可以用maven来管理jar包，这样就会方便很多。这里作为demo，我把目录的截图展示一下：

其中xalan.jar在本例中并没有用到，它是处理xml文档的一个jar包。

• web.xml配置文件

在web.xml中加入监听（就是个设计模式中的观察者模式），来将HttpFlexSession类作为监听器注册到web.xml中，这样当J2EE HttpSession属性和代理属性的变化时候，就会通知FlexSession属性和目前绑定的listener做相应处理。

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

加入blazeds提供的servlet，这样当URL请求符合/messagebroker/*（这个和后面展示的channel中的那个路径对应）模式时候，它会在Servlet容器启动时启动,并在启动时读取配置文件/WEB-INF/flex/services-config.xml.

 <!-- MessageBroker Servlet -->
    <servlet>
        <servlet-name>MessageBrokerServlet</servlet-name>
        <display-name>MessageBrokerServlet</display-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>

• 服务配置文件flex/services-config.xml

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

     <services>
         <service-include file-path="remoting-config.xml" />
         <service-include file-path="proxy-config.xml" />
         <service-include file-path="messaging-config.xml" />
     </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>
     <!--Channel的作用就是帮助我们传输消息.Channel使用URL与Endpoint通信.Endpoint就是消息传输的接收器,它并不真正处理消息,它将处理过程委托给service  -->
     <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>4</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>
     <!-- 输出到控制台 ,若要使用Servlet日志文件作为目标,将class属性改为"flex.messaging.log.ServletLogTarget".-->
       <!-- 中level="Error"为日志的记录级别.有None,Error,Warn,Info,Debug,All六种选择 -->
         <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>
             <!-- 信息的过滤条件,只有匹配的类别才会被记录到指定的目标中 -->
             <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>

配置文件就简单说明到这，有兴趣自己googling。。。。。

2.创建简单remote例子。

这里面我就用flexbuilder4.6和myeclipse两个分开来创建项目。我觉得这样舒服，你要是不爽，你也可以装插件，都在eclipse中编译。

• 后代java代码

 package com.bing.test;

 public class HelloWorld {

     public String getHelloWorld(String name){
         System.out.println("hello "+name);
         return "this is a test for " +name;
     }
 }

• 远程服务配置文件

 <?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>
     <!-- destination设置服务终端的目的地,属性id为客户端组件RemoteObject的destination -->
     <destination id="helloWorld" channels="my-amf">
         <properties>
             <source>com.bing.test.HelloWorld</source>
         </properties>
     </destination>
 </service>

• 前台flexbuilder中配置及代码

新建flex项目dstest，在服务器设置这一步，选择如下，当然你也可以创建好项目后在设置。

创建好之后，编写flex代码

 <?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">
     <fx:Script>
         <![CDATA[
             import mx.rpc.events.FaultEvent;
             import mx.rpc.events.ResultEvent;

             // Send the message in response to a Button click.
             private function dotest():void {
                 var text:String = ti.text;
                 remoteObject.getHelloWorld(text);
             }

             // Handle the recevied message.
             private function resultHandler(event:ResultEvent):void {
                 ta.text += "服务器返回: "+ event.result + "\n";
             }

             // Handle a message fault.
             private function faultHandler(event:FaultEvent):void {
                 ta.text += "Received fault: " + event.fault + "\n";
             }
         ]]>
     </fx:Script>
     <fx:Declarations>
         <s:RemoteObject id="remoteObject"
                         destination="helloWorld"
                         result="resultHandler(event);"
                         fault="faultHandler(event);"/>
     </fx:Declarations>

     <s:layout>
         <s:VerticalLayout gap="10" />
     </s:layout>
     <s:Label text="输入名字"/>
     <s:TextInput id="ti" text="Hello World!"/>
     <s:Button label="Send" click="dotest();"/>
     <s:TextArea id="ta" width="100%" height="100%"/>
 </s:Application>

编译之后，在myeclipse的项目目录下会出现一个debug目录，如下：

修改index.jsp页面，加入超链接

<html>
<body>
<h2>Hello World!</h2>
<a href="dstest-debug/dstest.html">ddd</a>
</body>
</html>

好了，这样就可以启动访问了。