Hub::Data::FileCache -

Attach an instance of a class to a file.

 Usage: fattach $filename, $class

$class must implement the method reload

Returns a hash of:

  lastread    # mod time last time we read it
  filename    # name
  lines       # ARRAY of lines in the file
  handlers    # HASH of attached classes

The instance is a singleton.

Get the file handler for a given file

 Usage: fhandler $filename, $classname
 Usage: fhandler $filename
In its first form, we will return the handler for the given class name.

In its second form, we will return all handlers for the given file.

Get the cache instance for a specific file

 Usage: finstance - $filename

Signal handlers to reparse

 Usage: frefresh [$filename], [options]

options:

  -force=>1         Force re-reading all
  -force_dirs=>1    Force re-reading of directories

Without a $filename, all file instances are checked for disk modifications.

If the file has been modified, re-read the file and tell all your handlers to reparse themselves via the reload method.

With a $filename, only handlers for the specific filename are signaled to reparse.

Modify the provided instance to reflect what is on disk.

 Usage: fread $instance

$instance must be the special hash returned by finstance If all handling classes implement the delay_reading function, and they all return a true value, we will not read file.

Ryan Gies (ryangies@livesite.net)

Copyright (C) 2006-2007 by Livesite Networks, LLC. All rights reserved.

Copyright (C) 2000-2005 by Ryan Gies. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

* The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.

* Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.

* The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

To the best of our knowledge, no patented algorithms have been used. However, we do not have the resources to carry out a patent search, and therefore cannot give any guarantee of the above statement.

08/02/2007