org.hd.d.pg2k.webSvr.location
Class LocThumbnailServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.hd.d.pg2k.webSvr.location.LocThumbnailServlet

All Implemented Interfaces:

java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig

public final class LocThumbnailServlet
extends javax.servlet.http.HttpServlet

Servlet to serve dynamic location thumbnail icon (ie with crosshairs). This expects two parameters, x and y, specifying the pixel coordinates of the centre of the crosshairs, ie where the exhibit is.

If the parameters are missing or out of bounds then the thumbnail is produced without crosshairs, possibly by redirection to the original (source) raw thumbnail image.

The image produced is with the type indicated by DYN_MAP_IMG_TYPE, in an efficient (small), indexed format.

Altered thumbnails may be cached, possibly with SoftReferences.

See Also:

Serialized Form

classLoadTime

private static final long classLoadTime

Creation/load time of this class.

serialVersionUID

private static final long serialVersionUID

Unique Serialisation class ID generated by http://random.hd.org/.

See Also:

Constant Field Values

LocThumbnailServlet

public LocThumbnailServlet()

doGet

public void doGet(javax.servlet.http.HttpServletRequest request,
                  javax.servlet.http.HttpServletResponse response)
           throws java.io.IOException,
                  javax.servlet.ServletException

Respond to a GET request for the content served by this servlet.

Overrides:

doGet in class javax.servlet.http.HttpServlet

Parameters:

request - The servlet request we are processing

response - The servlet response we are producing

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet error occurs

doHead

public void doHead(javax.servlet.http.HttpServletRequest request,
                   javax.servlet.http.HttpServletResponse response)
            throws java.io.IOException,
                   javax.servlet.ServletException

Respond to a HEAD request for the content served by this servlet.

Overrides:

doHead in class javax.servlet.http.HttpServlet

Parameters:

request - The servlet request we are processing

response - The servlet response we are producing

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet error occurs

doAction

public void doAction(javax.servlet.http.HttpServletRequest request,
                     javax.servlet.http.HttpServletResponse response)
              throws java.io.IOException,
                     javax.servlet.ServletException

Respond to a GET/HEAD request for the content served by this servlet. Returns the exhibit data, with a correct MIME type.

Parameters:

request - The servlet request we are processing

response - The servlet response we are producing

Throws:

java.io.IOException - if an input/output error occurs

javax.servlet.ServletException - if a servlet error occurs

getLastModified

protected long getLastModified(javax.servlet.http.HttpServletRequest request)

Have the last-modified date be the creation time of this class.

Overrides:

getLastModified in class javax.servlet.http.HttpServlet