Thanks a lot guys, I'll give it a try.
On Aug 3, 1:40 pm, Daniel Jue <teamp...@gmail.com> wrote:
> Thinking more on this particular app, I think you've hit the nail on the
> head.
>
> While I don't know all the requirements, I would say you would split this
> into a few pieces:
> A console/service app that gets text from somewhere and runs it.
> (The somewhere could be directly from a DB if you can contact it, or through
> a servlet request or email.)
>
> A GWT web app that records the user entries to a DB.
> You don't even really *need* GWT's async abilities since you probably aren't
> trying to do real time compiling on each line, etc.
> Just a big text box with a submit button on the bottom.
>
> A DB structured to hold a user's text data. It would need all the meta data
> necessary to recreate it as a file (name, timestamp, etc) and also support
> overwriting/versioning.
>
> Back at the university, we would email our jar'd source to an automated
> account, and then it would scan the source for plagarism, compile it, the
> run dozens of tests and record the output.
> Then we'd get the results mailed back to us. Not sure if the plagarism scan
> was done on the source or on the bytecode, but that's another note of a
> different song.
>
> On Mon, Aug 3, 2009 at 2:17 PM, Trevis <trevistho...@gmail.com> wrote:
>
> > I dont think that you're looking at your problem right. For starters
> > GWT and AppEngine are to totally separate and unrelated things. If you
> > don't intend to host on AppEngine you probably dont need to develop
> > with it.
>
> > Using RPC's to add lines of text to a file sounds like a really bad
> > idea. Like everyone else is saying, use a DB. AppEngine should make
> > persisting the info to a DB about as simple as it gets. (if you want
> > to use it)
>
> > When you're ready to pull down the user entered code to compile it you
> > can use an admin GWT page (or a simple servlet) that you would create
> > to read the text from the DB, and send it down to you so that it can
> > be compiled. If you wrote the retrieving component as a servlet then
> > you could set the page content type to plain/text and write the text
> > directly to the response which would give you a file save dialog when
> > you try to retrieve it.
>
> > Just my quick though to solving the problem, ymmv.
>
> > On Aug 3, 12:04 pm, Sednus <sed...@gmail.com> wrote:
> > > Well, I am trying to make an interface so that students can write
> > > their code on the web and I can compile it and run it in a computer
> > > cluster( Parallel Programs)... For them to see the how they work...
> > > but I've never worked woth stuff like this :s I am really noobie , but
> > > yes I need to create the file so to compile it and run it, yes its
> > > something unususal and i don't know what a DB tier is :(
>
> > > On Aug 3, 11:38 am, Daniel Jue <teamp...@gmail.com> wrote:
>
> > > > It really has nothing to do with GWT. You would have a servlet on the
> > > > serverside that responds to rpc calls, and the servlet would call some
> > file
> > > > writing command. (in the simplest, non-refactored way).
> > > > The file writing part doesn't care where the input came from.
> > > > As in logging, you won't be able to guarantee what order the data comes
> > in
> > > > when getting RPC calls. So multiple commands issued quicky may
> > generate
> > > > out-of-order text.
>
> > > > This said, since you are asking kind of basic questions...
>
> > > > Are you absolutely sure you want to write a file on the system?
> > > > Are you trying to do something unusual?
>
> > > > Most people would use a DB tier because it can handle multiple users
> > and
> > > > updates better, and it's easier to have a timestamp tacked onto the
> > message,
> > > > where it can be sorted.
> > > > Cleaning up the filesystem can be a chore.
> > > > Dealing with the filesystem is a chore. File locking? etc.
>
> > > > On Mon, Aug 3, 2009 at 12:26 PM, Sednus <sed...@gmail.com> wrote:
>
> > > > > Yes, I was planning to run it on my own server... but how do I make
> > > > > that while still using GWT? is it possible?
>
> > > > > On Aug 3, 11:04 am, Daniel Jue <teamp...@gmail.com> wrote:
> > > > > > Sure, you just have to run it on your own server, running jetty or
> > > > > tomcat,
> > > > > > etc.
>
> > > > > > On Mon, Aug 3, 2009 at 12:00 PM, Sednus <sed...@gmail.com> wrote:
>
> > > > > > > Well, I really need to create a file on the server side and write
> > on
> > > > > > > it whatever the user types on a text area.... is there any onther
> > way
> > > > > > > to accomplish this?
>
> > > > > > > On Aug 3, 10:30 am, Jason Parekh <jasonpar...@gmail.com> wrote:
> > > > > > > > No, unfortunately you don't have file system access on App
> > Engine.
> > > > > You
> > > > > > > can
> > > > > > > > store data in databases, but you won't have any file handlers
> > to that
> > > > > > > data.
> > > > > > > > jason
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