arjan, There are two sides to the App Engine API: the client and the server. The client side (appengine-api.jar) lives entirely in "user-land". If you so chose, you could create your own version of these classes. In the end, the client ends up talking to the server through a binary protocol in order to fulfill much of the API.
Having this separation means that you can evolve the client and server independently. For example, dev_appserver and prod obviously have two different server backends for the same client API. You can take that one step further and even independently implement your own server if you so chose. It also means that its trivial to do things like test out and even deploy hotfixes for individual applications instead of waiting for full releases. On Thu, May 12, 2011 at 4:31 PM, arjan tijms <arjan.ti...@gmail.com> wrote: > Hi ya! > > On May 12, 1:05 am, Didier Durand <durand.did...@gmail.com> wrote: > > 1 of the reasons is that all applications don't run all at the same > > version on the gae productive infrastructure. So, google would have to > > know which one you are using in order to put it for you in your war > > when you upload it. > > Hmmm, there are two possible problems with that explanation: > > 1. Aren't the GAE jars in the war the ones for local simulation and > not the actual ones used by the live GAE production servers? > 2. Why would Google need to put them into the war when we upload it? > Tomcat doesn't add the servlet-api jars to my war when I deploy it to > Tomcat, JBoss AS doesn't add the EJB, JPA, etc etc jars to a war being > deployed to it, Resin also doesn't do this. In fact, I've never > encountered any Java server that required jars for functionality that > the server provided to be put into the war. WEB-INF/lib is for extra > functionality that the server -does not- provide. > > If they just use it for detecting the version for which you developed > your app, then why not just put that version number in appengine- > web.xml? > > -- > 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 > google-appengine-java@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com. > 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 google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
