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are useful for JSP-based search result paging. The count attribute names the variable used to hold the number of search results. We use the tag in SearchResults.jsp, which is shown here:

Select the drop-down to the right of When (which should read Window right now) and change its setting to read Button. Change the dialog that reads Loaded to Click. The Triggers pane should now read When button Click is raised (see Figure 8-27).

<%@ page import="java.util.SortedMap" %> <%@ page import="javax.portlet.PortletURL" %> <%@ taglib uri="/WEB-INF/tld/taglibs-lucene.tld" prefix="lucene" %> <%@ taglib uri='http://java.sun.com/portlet' prefix='portlet'%> <portlet:defineObjects/> <% String query = request.getParameter("query"); if (query == null) { query = ""; } String indexPath = (String) request.getAttribute("indexPath"); %> <lucene:search var="hits" scope="page" field="contents" analyzer="standard" query="<%= query %>" startRow="0" maxRows="20" directory="<%= indexPath %>" count="count" /> <p>Total Number of Pages for <b><%= query %></b> : <%= pageContext.getAttribute("count") %></p> <% SortedMap[] hits = (SortedMap[]) pageContext.getAttribute("hits"); %> <% if (hits.length > 0) { <p/> <% PortletURL renderUrl = renderResponse.createRenderURL(); renderUrl.setParameter("contentPath", (String) hits[i].get("url")); %> <a href="<%=renderUrl.toString()%>"><%= hits[i].get("title") %></a> <br/> <%= hits[i].get("summary") %> <br/>(Score : <%= hits[i].get("score") %>) <% } } %> for (int i = 0; i < hits.length; i++) { %>

SqlParameter[] p1 = new SqlParameter[1]; p1[0] = new SqlParameter("@cartid", cartid); object obj=SqlHelper.ExecuteScalar(sql1, p1); decimal amount = (decimal)obj; string sql2 = "INSERT INTO Orders(cartid,orderdate,amount,street, country,state,city,postalcode) VALUES(@cartid,@orderdate,@amount,@street, @country,@state,@city,@postalcode)"; SqlParameter[] p2 = new SqlParameter[8]; p2[0] = new SqlParameter("@cartid", cartid); p2[1] = new SqlParameter("@orderdate", DateTime.Now); p2[2] = new SqlParameter("@amount", amount); p2[3] = new SqlParameter("@street", street); p2[4] = new SqlParameter("@country", country); p2[5] = new SqlParameter("@state", state); p2[6] = new SqlParameter("@city", city); p2[7] = new SqlParameter("@postalcode", postalcode); int i=SqlHelper.ExecuteNonQuery(sql2, p2); string sql3 = "INSERT INTO orderdetails(cartid,productid,qty) SELECT cartid,productid,qty FROM shoppingcart WHERE cartid=@cartid"; SqlParameter[] p3 = new SqlParameter[1]; p3[0] = new SqlParameter("@cartid", cartid); SqlHelper.ExecuteNonQuery(sql3, p3); string sql4 = "DELETE FROM shoppingcart WHERE cartid=@cartid"; SqlParameter[] p4 = new SqlParameter[1]; p4[0] = new SqlParameter("@cartid", cartid); SqlHelper.ExecuteNonQuery(sql4, p4); return i; } The PlaceOrder() method accepts six parameters. These parameters essentially capture the unique cart identifier and shipping address. Inside, the method retrieves the total amount of the cart. The shopping cart ID and shipping address are stored in the Orders table. Then product details such as product ID and quantity are added to the OrderDetails table. The link between the Orders and OrderDetails tables is CartID. The records are then deleted from the ShoppingCart table. This completes the web service. Compile it to ensure that there are no syntactical errors.

Because our content is on the file system, we can open the files with a FileReader. We use a BufferedReader to write each line of the HTML content to the portlet s writer, which would work well only for HTML. In a more advanced portlet, we would abstract the content delivery out of the portlet, and return content from a content delivery adapter to the portlet. For instance, HTML pages stored on the file system or in a database could be exposed to the Web with a servlet that also fixes links to work inside the portlet framework. The servlet could also deliver images, PDF files, or Microsoft Office files from the content store. Content that already exists on a web server can be proxied to the portal using a special portlet for web application integration. Jetspeed 1 has a WebPagePortlet class that renders applications on other web servers inside a portal, so look for that portlet to be updated for JSR 168 and Jetspeed 2. Other portals use different web clipping portlets to extract content from other web sites for the portal. Check the documentation for your portal, or use an open source web clipping portlet when one is released.

A pop-up box will appear, pointing out that no timeline for this event trigger is present, and asking if you want a new one. Click OK to create it (see Figure 8-28).