flex 4的RemoteObject的用法

访问远程Java对象

19.2.1  服务器端：实现POJO Java类

使用POJO类作为远程Java对象

19.2.2  服务器端：部署POJO Java类

19.2.3  服务器端：配置remote-config.xml

原始remote-config.xml文件

配置远程服务目标

<?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 id="shoppingCart">
        <properties>
            <source>com.mark.pojo.shoppingCart</source>
            <scope>session</scope>
        </properties>
    </destination>
</service>

限制远程Java对象可访问方法

<destination id="shoppingCart">
        <properties>
            <source>com.mark.pojo.shoppingCart</source>
            <scope>session</scope>
            <include-methods>
                <method name="purchaseItem"/>
                <method name="deleteItem"/>
            </include-methods>
        </properties>
    </destination>

<destination id="shoppingCart">
        <properties>
            <source>com.mark.pojo.shoppingCart</source>
            <scope>session</scope>
            <exclude-methods>
                <method name="purchaseItem"/>
            </exclude-methods>
        </properties>
    </destination>

19.2.4  客户端：实例化RemoteObject组件对象

var remoteObj:RemoteObject = new RemoteObject();
remoteObj.destination = "shoppingCart";

19.2.5  客户端：调用远程Java对象方法

<mx:RemoteObject id="remoteObj" destination="shoppingCart"/>
<mx:Button label="购物" click="remoteObj.purchase(‘TV’)"/>

19.2.6  客户端：处理响应和异常

……
<mx:Script>
    <![CDATA[
        import mx.rpc.events.FaultEvent;
        import mx.rpc.events.ResultEvent;
 
        //RemoteObject对象result事件侦听器方法
        private function roRespondHandler(event:ResultEvent):void{
            //处理远程服务响应   
        }
 
        //RemoteObject对象fault事件侦听器方法
        private function roErrorHandler(event:FaultEvent):void{
            //处理远程服务调用异常   
        }
    ]]>
</mx:Script>
    <!--实例化远程对象组件-->
    <mx:RemoteObject id="remoteObj" destination="shoppingCart"
        result="roRespondHandler(event)" fault="roErrorHandler(event)"/>
    <!--调用远程对象组件-->
    <mx:Button label="购物" click="remoteObj.purchase()"/>
……

19.2.7  使用<mx:operation>处理多个方法

使用mx.rpc.remoting.Operation类

使用<mx:method>标签

<mx:RemoteObject id="remoteObj" destination="shoppingCart"
    fault="roErrorHandler(event)">
    <mx:method name="clearCart" result="clearROResultHandler(event);"/>
    <mx:method name="deleteItem"
            result="deleteROResultHandler(event);">
        <mx:arguments>
            <item>{comboItem.selectedItem.data}</item>
        </mx:arguments>
    </mx:method>
<!-—参数顺序必须与purchaseItem(String itemName,int quantity)方法相匹配-->
    <mx:method name="purchaseItem"
            result="purchaseROResultHandler(event);">
        <mx:arguments>
            <item>{comboItem.selectedItem.data}</item>
            <qty>{txtQuantity.text}</qty>
        </mx:arguments>
    </mx:method>
</mx:RemoteObject>

    <mx:Button label="购物" click="remoteObj.purchaseItem.send()"/>