The following example shows how you might use SiteIdForItem with SiteLinkDroplet to identify a product’s site ID, then generate an absolute URL to the product on that site. The generated URL is used to set a request-scope variable that other JSPs can access:

<dsp:page>
<%--
  Generate a cross site URL and set in request scope parameter 'siteLinkUrl' so
  it's accessible to the calling JSP

  Expected page parameters:
    product - product item
    siteId -  the site to use in generated URL; if not supplied, use SiteIdForItem
              to obtain the site ID from the product item.
--%>
  <dsp:importbean bean="/atg/dynamo/droplet/multisite/SiteLinkDroplet"/>
  <dsp:importbean bean="/atg/commerce/multisite/SiteIdForItem"/>

  <dsp:getvalueof var="product" param="product"/>
  <dsp:getvalueof var="siteId" param="siteId"/>

  <c:choose>

    <%-- No site ID supplied, so get one from SiteIdForItem --%>
    <c:when test="${empty siteId}">
      <dsp:droplet name="SiteIdForItem">
        <dsp:param name="item" param="product"/>
        <dsp:param name="shareableTypeId" value="atg.ShoppingCart"/>
        <dsp:param name="currentSiteFirst" value="true"/>
        <dsp:oparam name="output">
          <dsp:getvalueof var="productSiteId" param="siteId"/>

          <dsp:droplet name="SiteLinkDroplet">
             <dsp:param name="siteId" value="${productSiteId}"/>
             <dsp:param name="path" param="product.template.url"/>
             <dsp:oparam name="output">
               <dsp:getvalueof var="siteLinkUrl" scope="request" param="url"/>
             </dsp:oparam>
          </dsp:droplet>
        </dsp:oparam>
      </dsp:droplet>
    </c:when>

    <%-- Site ID supplied --%>
    <c:otherwise>
      <dsp:droplet name="SiteLinkDroplet">
        <dsp:param name="siteId" value="${siteId}"/>
        <dsp:param name="path" param="product.template.url"/>
        <dsp:oparam name="output">
          <dsp:getvalueof var="siteLinkUrl" scope="request" param="url"/>
        </dsp:oparam>
      </dsp:droplet>
    </c:otherwise>
  </c:choose>

</dsp:page>