Re: [Hypercontent-developer] HyperContent 2.0 status

[Jack P. <jac...@gm...>]

Thanks Alex.

I plan to look at the code in terms of adding a topic map as a
navigational system to the architecture. It's pretty clear I'll need
to ask a few questions along the way.

The first one is: how soon a build.xml?

Many thanks.
Jack

On Thu, 2 Sep 2004 12:52:37 -0400, Alex Vigdor <av...@co...> wrote:
> Hello all,
>         I just wanted to provide a status update on the development of
> HyperContent 2.0.  As of last night,  I have created a new CVS module
> "hypercontent2" which contains the current code and library
> dependencies for HyperContent 2.  This is very much a work in progress;
> there are no build scripts currently, and I have not checked in any
> project content to demonstrate the new server.
>         The way to run HyperContent 2 is through a new class,
> "org.hypercontent.HTTPServer", which uses Tomcat in embedded mode to
> offer up the server.  HyperContent 2 is backwards compatible with
> version 1.x projects, but the structure has changed: project definition
> files now reside within the project repository, at
> "/config/project-definition.xml", and another file
> "/config/permissions.xml" is used to configure permissions.  I will
> check in sample content in the near future.
> 
> A quick overview of what is there already in the HyperContent 2.0 code
> base:  a standalone web server using JAAS for authentication, which can
> serve up static or processed data via "pipelines", and supports
> advanced browser caching via the HTTP1.1 specification, including
> support for If-Modified-Since and Etag headers, as well as the basic
> Last-Modified, Content-Length and Content-Type headers.  Projects are
> mapped to base paths within the servlet context, so that the URL of a
> file looks something like
> "http://www.server.edu/hypercontent-servlet/project-mapping/file-dir/
> file.ext". Recursive dependency resolution has been implemented, so for
> example a file which is transformed by an XSL stylesheet which imports
> another XSL file will be properly recognized as out-of-date if the
> imported XSL file is changed.  Disk caching has been implemented using
> Berkeley DB Java Edition, so that dynamic processing of a page is only
> performed once after server startup, until any dependency of that page
> is modified. As of right now, HyperContent 2 can act as a dynamic web
> server for any HyperContent 1.x project content. HyperContent 1.x style
> batch processing has not yet been migrated over, but will be soon.
> 
> HyperContent 2.0 is introducing a new type of view, which I've taken to
> calling "modal".  Any form of content presentation that was supported
> under HyperContent 1.x is considered a "static" view, such that it is
> mapped to a plain URL, and is a candidate for batch processing and disk
> caching.  Modal views of content will be mapped to a "mode" parameter
> in addition to the basic URL, and will not be capable of being built in
> a batch request or cached to disk - they are exclusively dynamic.  This
> type of view will be used for management and authoring tools.  I am
> currently working on integrating the Velocity templating engine as an
> alternative to XSLT, and with either templating language you will be
> able to import other modal views, such that modal views can be
> assembled as components and brought together in various combinations.
> For example, a directory browser will be a single component that might
> be reused in different contexts, such as a 1.x style management screen,
> or in an "open file" dialog that might pop-up when you want to insert
> an image in a WYSIWYG area.
> 
> We're still a few weeks off from doing an alpha release, but the code
> is now out there if anyone is interested in taking a peek.  I'll be
> happy to help anyone with further details on the migration process, as
> needed.
> 
> Cheers,
>         Alex
> 
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