org.universAAL.ui.resource.server
Class ResourceServer

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.universAAL.ui.resource.server.ResourceServer

All Implemented Interfaces:

Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public class ResourceServer
extends javax.servlet.http.HttpServlet

Resource Server receives GET and POST requests and exposes/serves requested resources from the common resources storage. One of the usage scenarios of this artefact is following: UI Handlers that are not always on the same node can, by using this server, obtain common (also application specific) resources. Since universAAL middleware does not have the capability to transfer binary files UI Handlers can obtain icons and other media types and connect them with the abstract UI representations comming from the applications. This way application developers can store specific resources into the common folder and then simply add their names to the abstract UI representations. The job of the UI Handlers is to merge this resources with the rendered user interfaces.

Author:

Andrej Grguric

See Also:

Serialized Form

Field Summary

static File	confHome
static String	PATH_TO_RESOURCES Path to resources; e.g. ...runner\configurations\ResourceServer

Constructor Summary

ResourceServer(ModuleContext mcontext)

Method Summary

protected void	doGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
protected void	doPost(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp)
String	getMimeType(String name) Determine mime type of the resource.
boolean	isAuthorized(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse resp) Checks if the resource Requester is authorized to access resource

Methods inherited from class javax.servlet.http.HttpServlet

doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service

Methods inherited from class javax.servlet.GenericServlet

destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

confHome

public static File confHome

PATH_TO_RESOURCES

public static String PATH_TO_RESOURCES

Path to resources; e.g. ...runner\configurations\ResourceServer

Constructor Detail

ResourceServer

public ResourceServer(ModuleContext mcontext)

Method Detail

getMimeType

public String getMimeType(String name)

Determine mime type of the resource. If resource type is not recognized (between gif, png, jpg, jpeg, xml, au, aa3, aac, aif, al, mp4, mpeg) null is returned.

Parameters:

name - resoruce name

Returns:

mime type

doGet

protected void doGet(javax.servlet.http.HttpServletRequest req,
                     javax.servlet.http.HttpServletResponse resp)
              throws javax.servlet.ServletException,
                     IOException

Overrides:

doGet in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException

isAuthorized

public boolean isAuthorized(javax.servlet.http.HttpServletRequest req,
                            javax.servlet.http.HttpServletResponse resp)

Checks if the resource Requester is authorized to access resource

Parameters:

req - The request

resp - The response

doPost

protected void doPost(javax.servlet.http.HttpServletRequest req,
                      javax.servlet.http.HttpServletResponse resp)
               throws javax.servlet.ServletException,
                      IOException

Overrides:

doPost in class javax.servlet.http.HttpServlet

Throws:

javax.servlet.ServletException

IOException