From: Bryan S. <Bry...@aa...> - 2002-07-01 07:41:49
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Hi I have a rough and ready outline of a servlet which handles the inclusion of a header and a footer and the imagemap data available for viewing at http://coyote.aad.gov.au/JFreeServlet/example2.html. The Inc HTML checkbox refers to whether to include the html or not. (only works when png selected as output, will expand as api expands) An earlier post referred to some imagemap suggestions. One problem that I have encountered is that in order to write the imagemap html the chart needs to be created for the html page. Then it can either be saved and then served later or regenerated when the image request occurs. Currently I am supporting the following cache (saving image locally for later serving) options. 0. include through a servlet request to a file cache, delete the file after initial retrieval 1. include through a servlet request to cache, do not delete the file after initial retrieval (file deletion handled externally) 2. include image through url reference, do not delete file after initial retrieval (file deletion handled externally) 3. Dynamic chart generated when image requested (No Imagemap Support, but not requiring chart to be generated twice) 4. Dynamic with imagemap support (Note requires chart to be generated twice) Anybody got any thoughts on this? Bryan |
From: David G. <dav...@ob...> - 2002-07-02 00:13:14
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Hi Bryan, I think I understand the problem, but I don't have enough servlet experie= nce=20 to be able to comment on the solution. Hopefully someone else will have = some=20 input... Regards, DG. On Monday 01 July 2002 8:35 am, Bryan Scott wrote: > Hi > > I have a rough and ready outline of a servlet which handles the > inclusion of a header and a footer and the imagemap data available for > viewing at http://coyote.aad.gov.au/JFreeServlet/example2.html. The In= c > HTML checkbox refers to whether to include the html or not. (only work= s > when png selected as output, will expand as api expands) > > An earlier post referred to some imagemap suggestions. > > One problem that I have encountered is that in order to write the > imagemap html the chart needs to be created for the html page. Then it > can either be saved and then served later or regenerated when the image > request occurs. Currently I am supporting the following cache (saving > image locally for later serving) options. > > 0. include through a servlet request to a file cache, delete the file > after initial retrieval > 1. include through a servlet request to cache, do not delete the file > after initial retrieval (file deletion handled externally) > 2. include image through url reference, do not delete file after initia= l > retrieval (file deletion handled externally) > 3. Dynamic chart generated when image requested (No Imagemap Support, > but not requiring chart to be generated twice) > 4. Dynamic with imagemap support (Note requires chart to be generated > twice) > > Anybody got any thoughts on this? > > Bryan |