Though not w.r.t GAE perspective, one problem i have experienced with jFree chart is their heavy memory usage when creating complex charts (due to its dependency on AWT). Perhaps its time to develop a better java charting API.
The architecture and cloud approach of Amazon Ec2 and GAE are completely different. So though you might get the benefit of charting or any approach by using amazon ec2, you lose other benefit by leaving GAE. ~Hari On Sun, Jun 20, 2010 at 2:40 PM, nicolas melendez <[email protected]>wrote: > amazon e2 > > > On Sun, Jun 20, 2010 at 3:51 AM, Blessed Geek <[email protected]>wrote: > >> IMPO, the best Java charting library in the world is JFreeChart. >> >> But you cannot use it for GAE. >> >> GAE architects would be overlooking one big phenomenon, if they ever >> recommend that we use client-side GWT graphics - you cannot and you >> should not if you are performing enterprise business charting. >> >> When I used to code in Cobol and Fortran 20 years ago, we would >> produce a 4 foot tall 50 lb stack of report per manager. A manager >> would pull out an inch of that report - the rest is collected by the >> janitor at 6 pm. So web-based dynamism has saved a lot of trees - we >> compelled people to print their own reports. So now, should we think >> we should compel users to give up on JPG, PNG or GIF charts in favour >> of javascripted images? >> >> No, javascripted images is not acceptable for charting. Javascripted >> images are good for SPC (statistical process control)/Shewhart, stock >> monitoring or various other real-time monitoring. But, when it comes >> to business reports, the user has to be able to right-click on the >> image and drag to paste on Open Office or MS Excel or Presentation. >> The user has to be able to edit the chart to place their own >> annotation in an Office graphics editor. Javascripted images is not >> usable that way. >> >> I realise the problem with JFreeChart and other Java graphics library >> is their dependency on AWT - and I recall having to set up video >> display emulators on headless servers hosting Tomcat to allow charting >> servlets to run. I think someone from Google recommended that people >> try using an Apache incubator library called something-something.... >> but first, are you sure GAE allows BufferedImage - isn't that an AWT >> thing? Secondly the features of that something-something... incubator >> lib compared to JFreeChart is like comparing the size of this planet >> to the Sun. >> >> So, if I need to sell my ideas to move things from local servers to >> GAE, Google needs to help me by providing means for Java graphics >> libraries to work on GAE (graphics which would either be stored on >> persistence repository or streamed directly to client). Otherwise, the >> only viable options are azure or ec2. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google App Engine for Java" group. >> To post to this group, send email to >> [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<google-appengine-java%[email protected]> >> . >> For more options, visit this group at >> http://groups.google.com/group/google-appengine-java?hl=en. >> >> > > > -- > Nicolás Meléndez > Java Software Developer > > 1) Google App Engine works: > > 1.a) http://www.clasificad.com.ar (Local free classifieds for housing, > sale, services, local community, curses,jobs, and events - GAE/J + Wicket + > YUI) > > 1.b) http://www.chessk.com (Massive multiplayer chess online GAE/J + > Applets + Wicket) > > 2) Linkedin: http://ar.linkedin.com/in/nicolasmelendez > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > [email protected]. > To unsubscribe from this group, send email to > [email protected]<google-appengine-java%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
