This web app is a simple service that looks at an id parameter and returns the mgi_logo.png image id the value of the parameter is contained in the ftp report MGI_Elsevier.rpt. Otherwise a transparent 1 pixel gif is returned.
The report used for the id list is configured in the init-param mapFile in the web.xml file. There are 2 special values for the id parameter; test and refresh. If the id parameter value submitted is test, the mgi_logo.png image is returned.
If the id parameter value submitted is refresh, the servlet will refresh the id mappings from the mapFile. The servlet address is doi/imageMap.