What its about

Alex
2004-10-26
2013-04-24
  • Alex
    Alex
    2004-10-26

    > It is Java-based, but I don't think it is free,
    > at least I couldn't
    > find it outside the CD-ROM.

    I wonder if the code is open (to look at).
    I've found O'Reilly a very friendly company
    to work with. They are not as protectionist
    as many others (and of course, that's why
    I use and pay for their products).

    > In any case, if we would like a web server
    > and servlet container, we could try:
    >
    > http://jetty.mortbay.org/jetty

    This is a common container. I've indirectly used
    it with a number of products (JBoss and Cocoon
    come to mind). When I first talked with John, I
    was considering integrating a web browser with
    a web server. I'm surprised something like this
    doesn't exist. Many of the Mozilla modules are
    written with C and Java equivilants. There is a
    Swing JEdit panel which handles basic HTML.
    However interesting, I think that's beyond
    the scope of this project.

    > What would be the benefits of running a webserver
    > versus the applet?

    It would be possible to run the exact same
    code on the server (ATI) as on the CDROM. We
    would have much more control of the output
    (we can generate HTML dynamically which is
    supported by ALL browsers). On the otherhand,
    I think it is over-the-head for most users,
    and introduces a number of other concerns
    (security, post conflicts, etc).

    > Do we need to perform more complex stuff
    > than what it is available via the applet?

    Not really, but I'll give you an example of
    the difficulties. Let me explain a bit how
    Vicaya works.

    There are two components: The Indexer and
    the Searcher. The Indexer need only be run
    once (on John's machine, perhaps). This
    generates the index which allows very fast
    searches at a later time.

    The Searcher is loaded into the browser as
    an applet. It reads the index (directory)
    from the local media and performs the query
    from the user input against the index. We
    then generate a temp HTML file on the local
    harddrive containing the search hits. We
    then tell the browser to open the temp file
    in the active window.

    The applet must be signed for all of that
    to work (read/write permissions). The
    application can simply bypass all the
    security restrictions, but because it is
    not running in a browser window, it has to
    jump through hoops to open the temp HTML
    file in the default system browser.

    All of that works (less or more). However,
    it's at that level that keeps me from supporting
    a few browser/platform combinations. IE/Mac
    comes to mind.

    You'll notice that for very obvious
    queries, the HTML file is quite large
    and takes a bit of time to generate and
    load in a browser. This isn't necessary at
    all. However, the alternatives are interesting.
    (1) Generate multiple pages with 10-20 hits
    per page. (2) Generate one page with 10-20
    hits and embed the applet in that page, add
    (next, previous) buttons in the applet and
    requery and retrieve the appropriate hits. I'm sure
    you could come up with others.

    Of course, there are a bunch of cosmetic features,
    that I'm not ready to care about yet (feel free
    to implement them) such as "return key" instead
    of searching after a button click. This list is
    inexhaustible though.

    While not (yet) required by ATI, I'd like to get
    this Unicode compliant.

    Javascript. I used to scoff at any Javascript
    solutions, but I've come to see it as a very
    powerful language. It's just annoying because
    there is no type checking and there are no good
    editors.

    However, I have been considering embedding a
    hidden version of Vicaya in a web page and
    access the Lucene classes via vanilla HTML
    forms, javascript events and LiveConnect.
    The hits page can be generated completely
    dynamically, without temp files and all the
    features we require. It's four years since I
    last decided LiveConnect was a deadend.
    Perhaps its matured since then.

    This adds a compatibility issue, but perhaps it will
    work better than the Java applet alone.

    > It works fine on Fedora Core
    > (formerly Red Hat Linux) and
    > Firefox, with the Java plug-in from Sun.

    I'm very happy to hear that. We'll add the
    good news to the supported
    platform list.

    > I noticed that Vicaya is not in CVS,
    > what are your plans
    > regarding this?

    I am a big fan of CVS. However, as of today,
    this is a one-man development show. Perhaps
    this is chicken-and-egg. I think the
    lack of a web page keeps developers away,
    but maybe CVS might help attract them. Before
    CVS though, is the web page.

     
    • Hugo Gayosso
      Hugo Gayosso
      2004-10-27

      I will split the current discussion in different topics.

       
  • Hugo Gayosso
    Hugo Gayosso
    2004-10-27

    > This adds a compatibility issue, but perhaps it will
    > work better than the Java applet alone.

    I would put compatibility as one of the top priorities, we want this CD-ROM to be usable by anybody and as self-contained as possible.

     
  • Hugo Gayosso
    Hugo Gayosso
    2004-10-27

    > I think the
    > lack of a web page keeps developers away,
    > but maybe CVS might help attract them. Before
    > CVS though, is the web page.

    I will try to get a web page ready.

    Even if it is a one-man-show, I would recommend that you upload it to CVS, you don't need to grant write permissions for anybody, and having it on CVS will allow other people to generate patches against it to send it to you.

    Plus, if you get hit by the proverbial truck, the code will be there for somebody else to take. :-)