[ETC] Direct Web Remoting

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<servlet>  
    <servlet-name>dwr-invoker</servlet-name>  
    <display-name>DWR Servlet</display-name>  
    <description>Direct Web Remoter Servlet</description>  
    <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>  
    <init-param>  
         <param-name>debug</param-name>  
         <param-value>true</param-value>  
    </init-param>  
</servlet>  
       
<servlet-mapping>  
    <servlet-name>dwr-invoker</servlet-name>  
    <url-pattern>/dwr/*</url-pattern>  
</servlet-mapping>  

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 <script src='dwr/interface/ApartmentDAO.js'></script>  
 <script src='dwr/engine.js'></script>  
 <script src='dwr/util.js'></script>  
.   
.   
.   
  
 <script language="javascript">  
 function updateTotal() {   
    $("resultTable").style.display = 'none';   
    var bedrooms = document.getElementById("bedrooms").value;   
    var bathrooms = document.getElementById("bathrooms").value;   
    var price = document.getElementById("price").value;   
    ApartmentDAO.countApartments(loadTotal, bedrooms, bathrooms, price);   
 }   
  
 function loadTotal(data) {   
    document.getElementById("totalRecords").innerHTML = data;   
 }   
</script>  
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DWR은 클라이언트가 서버단의 서비스 객체를 호출하기 위한 일종의 스텁 스크립트를 자동으로 생성해준다. 
dwr/interface/*는 서버단의 서비스 객체를 호출하기 위한 자바스크립트를 만들어주는 URL이다. 그렇기 때문에 ApartmentDAO객체를 클라이언트 쪽에서 사용하기 위해서는 미리 ApartmentDAOrk 정의 되어 있는 자바스크립트를 소스에 포함시켜야 한다. 
<script src='dwr/interface/ApartmentDAO.js'></script>
그러면 ApartmentDAO의 메소드를 스크립트 안에서 사용할 수 있다. 

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<bean  
      id="productDwr"  
      class="com.tmax.tody.dwr.tody.ProductDwr"  
  >  
    <property name="moduleService">  
      <ref bean="moduleService"/>  
    </property>  
    <property name="versionService">  
      <ref bean="versionService"/>  
    </property>  
  </bean>  

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<create creator="spring" javascript="ProductDwr">    
    <param name="beanName" value="productDwr"/>    
</create>  
  
<convert converter="bean" match="com.tmax.tody.domain.tody.*"/>  

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<script type='text/javascript' src='dwr/interface/ProductDwr.js'></script>  
<script type='text/javascript' src='dwr/engine.js'></script>  
<script type='text/javascript' src='dwr/util.js'></script>  
  
<script type="text/javascript">  
    function setSubVersion(mainVersionCode, systemCode, userId) {   
      var productCode = $("productCode").value;   
      ProductDwr.findSearchSubVersions(productCode, systemCode, userId, mainVersionCode,listMainVersionProcess);   
    }   
</script>  
  
<select name="mainVersionCode" class="input" onchange="*setSubVersion*   
(this.value, '${sessionScope.currentSystem}', '${sessionScope.user.id}');" style="width:48%;">  
    <option value="">::: 선택 :::</option>  
    <c:if test="${not empty mainVersions}">  
        <c:forEach var="mv" items="${mainVersions}">  
            <option value="${mv.versionCode}" ${(param.mainVersionCode ==  mv.versionCode)? 'selected':''}>${mv.versionName}</option>  
        </c:forEach>  
    </c:if>  
</select>  
<c:choose>  
    <c:when test="${not empty subVersions}">  
        <select name="subVersionCode" class="input" style="width:50%;">  
            <option value="">::: 선택 :::</option>  
            <c:if test="${not empty subVersions}">  
                <c:forEach var="sv" items="${subVersions}">  
                    <option value="${sv.versionCode}" ${(param.subVersionCode == sv.versionCode)? 'selected':''}>${sv.versionName}</option>  
                </c:forEach>  
            </c:if>  
        </select>  
    </c:when>  
    <c:otherwise>  
        <select name="subVersionCode" class="input" style="width:50%; display:'none';">  
            <option value="">::: 선택 :::</option>  
        </select>  
    </c:otherwise>  
</c:choose>  

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<beans  
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
   xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"  
   xsi:schemaLocation="http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans.xsd   
       http://www.directwebremoting.org/schema/spring-dwr   
       http://www.directwebremoting.org/schema/spring-dwr-2.0.xsd">  
          
  
    <dwr:configuration>  
        <dwr:convert match="com.tmax.tody.domain.tody.*" type="bean"/>    
    </dwr:configuration>  
    
    <bean id="productDwr" class="com.tmax.tody.dwr.tody.ProductDwr">  
    <dwr:remote javascript="ProductDwr" />  
         <property name="moduleService">  
        <ref bean="moduleService"/>  
         </property>  
         <property name="versionService">  
        <ref bean="versionService"/>  
         </property>  
    </bean>