You can pass parameters to an ATG servlet bean just as you do to an embedded JSP. For example, the following passes the storename parameter with a value of Joe's Hardware to the ATG servlet bean /test/DSBStoreTest:
<%@ taglib uri="/dspTaglib" prefix="dsp" %> <dsp:page> <html> <head><title>DSB Store Test</title></head> <body><h1>DSB Store Test</h1> <dsp:droplet name="/test/DSBStoreTest"> <dsp:param name="storename" value="Joe's Hardware"/> </dsp:droplet> </body></html> </dsp:page>
You can access these parameters with the getParameter() call found in HttpServletRequest, as in the following ATG servlet bean, DSBStoreTest.java, which prints out a header that includes the storename parameter:
public void service (DynamoHttpServletRequest request,
DynamoHttpServletResponse response)
throws ServletException, IOException
{
String storename = request.getParameter ("storename");
if (storename == null) storename = "No-Name's";
ServletOutputStream out = response.getOutputStream ();
out.println ("<h1>Welcome to " + storename + "</h1>");
}If the parameter is not defined, getParameter()returns null, so your code should be prepared for that situation.
Your ATG servlet bean can access any parameter that is visible to the dsp:droplet tag calling the ATG servlet bean. This includes parameters passed directly to the ATG servlet bean, as well as any parameters visible to the JSP containing the dsp:droplet tag.
Because getParameter() can return only Strings, this method should be used only for parameters that are not open parameters. The next sections describe a more general way to deal with parameters, both simple and open.
