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.\" ========================================================================
.\"
.IX Title "TM::Materialized::MLDBM2 3pm"
.TH TM::Materialized::MLDBM2 3pm "2008-06-25" "perl v5.10.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
TM::Materialized::MLDBM2 \- Topic Maps, DBM Storage (synchronous)
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&   NOTE: THIS PACKAGE IS NOW DEPRECATED
\&   NOTE: USE TM::ResourceAble::MLDBM INSTEAD
\&
\&   use TM::Materialized::MLDBM2;
\&   {
\&    my $tm = new TM::Materialized::MLDBM2 (file => \*(Aq/tmp/map.dbm\*(Aq);
\&    # 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::Materialized::MLDBM2 (file => \*(Aq/tmp/map.dbm\*(Aq);
\&    # we are back in business, no sync necessary
\&    }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This package just implements \s-1TM\s0 with a BerkeleyDB store. Unlike TM::Materialized::MLDBM this
module does not need explicit synchronisation with the external resource (the \s-1DBM\s0 file here).  It
ties content-wise with the \s-1DBM\s0 file at constructor time and unties at \s-1DESTROY\s0 time.
.PP
The advantage of this storage form is that there is little memory usage. Only those fractions of the
map are loaded which are actually needed. If one has very intense interactions with the map (as a
query processor has), then this storage technique is not optimal.
.SH "INTERFACE"
.IX Header "INTERFACE"
.SS "Constructor"
.IX Subsection "Constructor"
The constructor expects a hash with the following keys:
.IP "\fBfile\fR (no default)" 4
.IX Item "file (no default)"
This contains the file name of the \s-1DBM\s0 file to tie to.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1TM\s0, TM::Materialized::MLDBM
.SH "AUTHOR INFORMATION"
.IX Header "AUTHOR INFORMATION"
Copyright 200[68], Robert Barta <drrho@cpan.org>, All rights reserved.
.PP
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