com.day.cq.commons.servlets

Interface NonExistingResourceServlet

All Superinterfaces:

OptingServlet, javax.servlet.Servlet

public interface NonExistingResourceServlet
extends OptingServlet

NonExistingResourceServlet is a specific servlet interface for servlets that need to handle non-existing resources. Via the OptingServlet.accepts(org.apache.sling.api.SlingHttpServletRequest) method the implementing servlet must check if it will handle the given non-existing path.

Please note: This is a temporary solution until Sling provides a built-in mechanism for this use case. Not to be used by client implementations!

This servlet will not be registered directly with Sling but rather with a distinct dispatcher servlet that is registered for the GET, HEAD, POST and PUT HTTP methods on the sling:nonexisting resource ( NonExistingDispatcherServlet).

To give a bit control over the order, set the standard OSGi property service.ranking (Integer) on the servlet to define an integer value for the order - the implementations with the highest number are called first. The first servlet that returns true in its OptingServlet.accepts(org.apache.sling.api.SlingHttpServletRequest) method will handle the request.

Example code:

  @Component
  @Service(NonExistingResourceServlet.class)
  @Property(name="service.ranking",intValue=10)
               
  @SuppressWarnings("serial")
  public class TesterServlet extends SlingAllMethodsServlet implements NonExistingResourceServlet {
 
      public boolean accepts(SlingHttpServletRequest request) {
          // get non-existing path (incl. selectors and extension!)
          String path = request.getResource().getPath();
          // return true if this servlet can handle this path
          return true;
      }
     
      @Override
      protected void doGet(SlingHttpServletRequest request,
                  SlingHttpServletResponse response) throws ServletException,
                  IOException {
          // handle actual GET request here
          // ...
      }
 

Method Summary

Methods inherited from interface org.apache.sling.api.servlets.OptingServlet

accepts

Methods inherited from interface javax.servlet.Servlet

destroy, getServletConfig, getServletInfo, init, service