tm::resourceable(3pm) [debian man page]

TM::ResourceAble(3pm)					User Contributed Perl Documentation				     TM::ResourceAble(3pm)

NAME

       TM::ResourceAble - Topic Maps, abstract trait for resource-backed Topic Maps

SYNOPSIS

	  package MyNiftyMap;

	    use TM;
	    use base qw(TM);
	    use Class::Trait ('TM::ResourceAble');

	    1;

	  my $tm = new MyNiftyMap;
	  $tm->url ('http://nirvana/');

	  warn $tm->mtime;

	  # or at runtime even:

	  use TM;
	  Class::Trait->apply ('TM', qw(TM::ResourceAble));
	  my $tm = new TM;
	  warn $tm->mtime;

DESCRIPTION

       This traits adds methods to provide the role resource to a map. That allows a map to be associated with a resource which is addressed by a
       URL (actually a URI for that matter).

   Predefined URIs
       The following resources, actually their URIs are predefined:

       "io:stdin"
	   Symbolizes the UNIX STDIN file descriptor. The resource is all text content coming from this file.

       "io:stdout"
	   Symbolizes the UNIX STDOUT file descriptor.

       "null:"
	   Symbolizes a resource which never delivers any content and which can consume any content silently (like "/dev/null" under UNIX).

   Predefined URI Methods
       "inline"
	   An inlined resource is a resource which contains all content as part of the URI. Currently the TM content is to be written in AsTMa=.

	   Example:

	     inlined:donald (duck)

INTERFACE

   Methods
       url $url = $tm->url

	   $tm->url ($url)

	   Once an object of this class is instantiated it keeps the URL of the resource to which it is associated. With this method you can
	   retrieve and set that. No special further action is taken otherwise.

       mtime
	   $time = $tm->mtime

	   This function returns the UNIX time when the resource has been modified last. 0 is returned if the result cannot be determined. All
	   methods from LWP are supported.

	   Special resources are treated as follows:

	   "null:"
	       always has mtime 0

	   "io:stdin"
	       always has an mtime 1 second in the future. The idea is that STDIN always has new content.

	   "io:stdout"
	       always has mtime 0. The idea is that STDOUT never changes by itself.

SEE ALSO

       TM

AUTHOR INFORMATION

       Copyright 200[67], Robert Barta <drrho@cpan.org>, All rights reserved.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
       http://www.perl.com/perl/misc/Artistic.html

perl v5.10.1							    2010-08-04						     TM::ResourceAble(3pm)

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TM::ResourceAble::MLDBM(3pm)				User Contributed Perl Documentation			      TM::ResourceAble::MLDBM(3pm)

NAME

       TM::ResourceAble::MLDBM - Topic Maps, DBM Storage (synchronous)

SYNOPSIS

	   use TM::ResourceAble::MLDBM;
	  {
	   my $tm = new TM::ResourceAble::MLDBM (file => '/tmp/map.dbm');
	   # modify the map here.....

	   } # it goes out of scope here, and all changes are written back automagically

	  # later in the game
	  {
	   my $tm = new TM::ResourceAble::MLDBM (file => '/tmp/map.dbm');
	   # we are back in business, no sync necessary
	   }

DESCRIPTION

       This package just implements TM with a BerkeleyDB store. Unlike TM::Materialized::MLDBM this module does not need explicit synchronisation
       with the external resource (the DBM file here).	It ties content-wise with the DBM file at constructor time and unties at DESTROY time.

       This implementation technique is not so memory-efficient as I had thought. Whenever an assertion or a toplet is referenced, the whole block
       of toplets, resp. assertions, is loaded from the DB database.  For small maps this is really fast, but it can become a drag for larger
       maps. See TM::ResourceAble::BDB for a more efficient solution.

       NOTE: Be careful to use this together with TM::Index::*. The indices will be held as part of the map, and so will be stored along side. If
       you heavily use the map, this can result in many swapin/swapouts.  Better to look at TM::IndexAble for that matter.

INTERFACE

   Constructor
       The constructor expects a hash with the following keys:

       file (no default)
	   This contains the file name of the DBM file to tie to.

SEE ALSO

       TM, TM::Materialized::MLDBM

AUTHOR INFORMATION

       Copyright 200[68], Robert Barta <drrho@cpan.org>, All rights reserved.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
       http://www.perl.com/perl/misc/Artistic.html

perl v5.10.1							    2010-07-18					      TM::ResourceAble::MLDBM(3pm)

Linux and UNIX Man Pages

tm::resourceable(3pm) [debian man page]

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