org.hd.d.pg2k.webSvr.virtualHosts.AlohaEarth
Class AlohaEarthMapServlet

java.lang.Object
  javax.servlet.GenericServlet
      javax.servlet.http.HttpServlet
          org.hd.d.pg2k.webSvr.virtualHosts.AlohaEarth.AlohaEarthMapServlet

All Implemented Interfaces:

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

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

Servlet to serve dynamic Aloha Earth map image. This expects to be able to collect parameters with a AEParams object.

If the parameters are missing or out of bounds then a default image is produced.

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

Images may be cached, possibly with SoftReference, though any such cache may need to be cleared when the exhibit set or meta data changes.

See Also:

Serialized Form

serialVersionUID

private static final long serialVersionUID

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

See Also:

Constant Field Values

AlohaEarthMapServlet

public AlohaEarthMapServlet()

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 AEP unchanged-since timestamp.

Overrides:

getLastModified in class javax.servlet.http.HttpServlet