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# |
# |
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# See COPYRIGHT section in pod text below for usage and distribution rights. |
# See COPYRIGHT section in pod text below for usage and distribution rights. |
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# |
# |
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################################# |
############################################ |
8 |
# |
# |
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# $Log$ |
# $Log$ |
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# Revision 1.14 2002/12/19 16:27:59 joko |
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# - moved 'sub dropDb' to Data::Storage::Handler::DBI |
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# |
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# Revision 1.13 2002/12/17 21:54:12 joko |
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# + feature when using Tangram: |
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# + what? each object created should delivered with a globally(!?) unique identifier (GUID) besides the native tangram object id (OID) |
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# + patched Tangram::Storage (jonen) |
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# + enhanced Data::Storage::Schema::Tangram (joko) |
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# + enhanced Data::Storage::Handler::Tangram 'sub getObjectByGuid' (jonen) |
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# + how? |
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# + each concrete (non-abstract) class gets injected with an additional field/property called 'guid' - this is done (dynamically) on schema level |
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# + this property ('guid') gets filled on object creation/insertion from 'sub Tangram::Storage::_insert' using Data::UUID from CPAN |
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# + (as for now) this property can get accessed by calling 'getObjectByGuid' on the already known storage-handle used throughout the application |
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# |
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# Revision 1.12 2002/12/12 02:50:15 joko |
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# + this now (unfortunately) needs DBI for some helper functions |
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# + TODO: these have to be refactored to another scope! (soon!) |
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# |
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# Revision 1.11 2002/12/11 06:53:19 joko |
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# + updated pod |
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# |
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# Revision 1.10 2002/12/07 03:37:23 joko |
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# + updated pod |
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# |
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# Revision 1.9 2002/12/01 22:15:45 joko |
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# - sub createDb: moved to handler |
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# |
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# Revision 1.8 2002/11/29 04:48:23 joko |
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# + updated pod |
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# |
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# Revision 1.7 2002/11/17 06:07:18 joko |
# Revision 1.7 2002/11/17 06:07:18 joko |
41 |
# + creating the handler is easier than proposed first - for now :-) |
# + creating the handler is easier than proposed first - for now :-) |
42 |
# + sub testAvailability |
# + sub testAvailability |
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# Revision 1.1 2002/10/10 03:43:12 cvsjoko |
# Revision 1.1 2002/10/10 03:43:12 cvsjoko |
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# + new |
# + new |
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# |
# |
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################################# |
############################################ |
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# aim_V1: should encapsulate Tangram, DBI, DBD::CSV and LWP:: to access them in an unordinary way ;) |
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# aim_V2: introduce a generic layered structure, refactor *SUBLAYER*-stuff, make (e.g.) this possible: |
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# - Perl Data::Storage[DBD::CSV] -> Perl LWP:: -> Internet HTTP/FTP/* -> Host Daemon -> csv-file |
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70 |
BEGIN { |
BEGIN { |
71 |
$Data::Storage::VERSION = 0.01; |
$Data::Storage::VERSION = 0.02; |
72 |
} |
} |
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|
75 |
=head1 NAME |
=head1 NAME |
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|
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Data::Storage - Interface for accessing various Storage implementations for Perl in an independent way |
Data::Storage - Interface for accessing various Storage implementations for Perl in an independent way |
78 |
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80 |
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=head1 AIMS |
81 |
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- should encapsulate Tangram, DBI, DBD::CSV and LWP:: to access them in an unordinary (more convenient) way ;) |
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- introduce a generic layered structure, refactor *SUBLAYER*-stuff, make (e.g.) this possible: |
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Perl Data::Storage[DBD::CSV] -> Perl LWP:: -> Internet HTTP/FTP/* -> Host Daemon -> csv-file |
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- provide generic synchronization mechanisms across arbitrary/multiple storages based on ident/checksum |
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maybe it's possible to have schema-, structural- and semantical modifications synchronized??? |
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89 |
=head1 SYNOPSIS |
=head1 SYNOPSIS |
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... the basic way: |
=head2 BASIC ACCESS |
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=head2 ADVANCED ACCESS |
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... via inheritance: |
... via inheritance: |
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$self->{storage}->insert($proxyObj); |
$self->{storage}->insert($proxyObj); |
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=head2 SYNCHRONIZATION |
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my $nodemapping = { |
114 |
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'LangText' => 'langtexts.csv', |
115 |
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'Currency' => 'currencies.csv', |
116 |
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'Country' => 'countries.csv', |
117 |
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}; |
118 |
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119 |
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my $propmapping = { |
120 |
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'LangText' => [ |
121 |
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[ 'source:lcountrykey' => 'target:country' ], |
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[ 'source:lkey' => 'target:key' ], |
123 |
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[ 'source:lvalue' => 'target:text' ], |
124 |
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], |
125 |
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'Currency' => [ |
126 |
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[ 'source:ckey' => 'target:key' ], |
127 |
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[ 'source:cname' => 'target:text' ], |
128 |
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], |
129 |
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'Country' => [ |
130 |
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[ 'source:ckey' => 'target:key' ], |
131 |
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[ 'source:cname' => 'target:text' ], |
132 |
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], |
133 |
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}; |
134 |
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135 |
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sub syncResource { |
136 |
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137 |
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my $self = shift; |
138 |
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my $node_source = shift; |
139 |
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my $mode = shift; |
140 |
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my $opts = shift; |
141 |
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142 |
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$mode ||= ''; |
143 |
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$opts->{erase} ||= 0; |
144 |
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145 |
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$logger->info( __PACKAGE__ . "->syncResource( node_source $node_source mode $mode erase $opts->{erase} )"); |
146 |
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147 |
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# resolve metadata for syncing requested resource |
148 |
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my $node_target = $nodemapping->{$node_source}; |
149 |
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my $mapping = $propmapping->{$node_source}; |
150 |
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151 |
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if (!$node_target || !$mapping) { |
152 |
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# loggger.... "no target, sorry!" |
153 |
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print "error while resolving resource metadata", "\n"; |
154 |
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return; |
155 |
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} |
156 |
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157 |
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if ($opts->{erase}) { |
158 |
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$self->_erase_all($node_source); |
159 |
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} |
160 |
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161 |
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# create new sync object |
162 |
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my $sync = Data::Transfer::Sync->new( |
163 |
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storages => { |
164 |
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L => $self->{bizWorks}->{backend}, |
165 |
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R => $self->{bizWorks}->{resources}, |
166 |
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}, |
167 |
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id_authorities => [qw( L ) ], |
168 |
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checksum_authorities => [qw( L ) ], |
169 |
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write_protected => [qw( R ) ], |
170 |
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verbose => 1, |
171 |
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); |
172 |
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173 |
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# sync |
174 |
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# todo: filter!? |
175 |
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$sync->syncNodes( { |
176 |
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direction => $mode, # | +PUSH | +PULL | -FULL | +IMPORT | -EXPORT |
177 |
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method => 'checksum', # | -timestamp | -manual |
178 |
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source => "L:$node_source", |
179 |
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source_ident => 'storage_method:id', |
180 |
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source_exclude => [qw( id cs )], |
181 |
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target => "R:$node_target", |
182 |
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target_ident => 'property:oid', |
183 |
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mapping => $mapping, |
184 |
|
} ); |
185 |
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|
186 |
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} |
187 |
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188 |
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|
189 |
=head2 NOTE |
=head2 NOTE |
190 |
|
|
191 |
This module heavily relies on DBI and Tangram, but adds a lot of additional bugs and quirks. |
This module heavily relies on DBI and Tangram, but adds a lot of additional bugs and quirks. |
192 |
Please look at their documentation and/or this code for additional information. |
Please look at their documentation and/or this code for additional information. |
193 |
|
|
194 |
|
|
195 |
=head1 REQUIREMENTS |
=head1 REQUIREMENTS |
196 |
|
|
197 |
For full functionality: |
For full functionality: |
198 |
DBI from CPAN |
DBI from CPAN |
199 |
Tangram from CPAN |
DBD::mysql from CPAN |
200 |
Class::Tangram from CPAN |
Tangram 2.04 from CPAN (hmmm, 2.04 won't do in some cases) |
201 |
MySQL::Diff from http://adamspiers.org/computing/mysqldiff/ |
Tangram 2.05 from http://... (2.05 seems okay but there are also additional patches from our side) |
202 |
... and all their dependencies |
Class::Tangram from CPAN |
203 |
|
DBD::CSV from CPAN |
204 |
|
MySQL::Diff from http://adamspiers.org/computing/mysqldiff/ |
205 |
|
... and all their dependencies |
206 |
|
|
207 |
=cut |
=cut |
208 |
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|
217 |
use Data::Storage::Locator; |
use Data::Storage::Locator; |
218 |
use Data::Dumper; |
use Data::Dumper; |
219 |
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|
220 |
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# TODO: wipe out! |
221 |
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use DBI; |
222 |
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|
223 |
# TODO: actually implement level (integrate with Log::Dispatch) |
# TODO: actually implement level (integrate with Log::Dispatch) |
224 |
my $TRACELEVEL = 0; |
my $TRACELEVEL = 0; |
225 |
|
|
248 |
# - Deep recursion on subroutine "Data::Storage::AUTOLOAD" |
# - Deep recursion on subroutine "Data::Storage::AUTOLOAD" |
249 |
# - Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" |
# - Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD" |
250 |
# - Deep recursion on anonymous subroutine at [...] |
# - Deep recursion on anonymous subroutine at [...] |
251 |
# we also might filter log messages caused by logging itself in "advanced logging of AUTOLOAD calls" |
# we also might filter log messages caused by logging to itself in "advanced logging of AUTOLOAD calls" |
252 |
|
|
253 |
my $self = shift; |
my $self = shift; |
254 |
our $AUTOLOAD; |
our $AUTOLOAD; |
270 |
$logstring .= "\t" x $tabcount . "(AUTOLOAD)"; |
$logstring .= "\t" x $tabcount . "(AUTOLOAD)"; |
271 |
# TODO: only ok if logstring doesn't contain |
# TODO: only ok if logstring doesn't contain |
272 |
# e.g. "Data::Storage[Tangram]->insert(SystemEvent=HASH(0x5c0034c)) (AUTOLOAD)" |
# e.g. "Data::Storage[Tangram]->insert(SystemEvent=HASH(0x5c0034c)) (AUTOLOAD)" |
273 |
# but that would be way too specific as long as we don't have an abstract handler for this ;) |
# but that would be _way_ too specific as long as we don't have an abstract handler for this ;) |
274 |
$logger->debug( $logstring ); |
$logger->debug( $logstring ); |
275 |
#print join('; ', @_); |
#print join('; ', @_); |
276 |
} |
} |
277 |
|
|
278 |
# filtering AUTOLOAD calls |
# filtering AUTOLOAD calls and first-time-touch of the actual storage impl |
279 |
if ($self->_filter_AUTOLOAD($method)) { |
if ($self->_filter_AUTOLOAD($method)) { |
280 |
#print "_accessStorage\n"; |
#print "_accessStorage\n"; |
281 |
$self->_accessStorage(); |
$self->_accessStorage(); |
335 |
#my @args = %{$self->{locator}}; |
#my @args = %{$self->{locator}}; |
336 |
my @args = (); |
my @args = (); |
337 |
|
|
338 |
# create new storage handle object, propagate arguments to handler |
# - create new storage handle object |
339 |
# pass locator by reference to be able to store status information in it |
# - propagate arguments to handler |
340 |
|
# - pass locator by reference to be able to store status- or meta-information in it |
341 |
$self->{STORAGEHANDLE} = $pkg->new( locator => $self->{locator}, @args ); |
$self->{STORAGEHANDLE} = $pkg->new( locator => $self->{locator}, @args ); |
342 |
|
|
343 |
} |
} |
371 |
} |
} |
372 |
|
|
373 |
sub removeLogDispatchHandler { |
sub removeLogDispatchHandler { |
374 |
|
my $self = shift; |
375 |
my $self = shift; |
my $name = shift; |
376 |
my $name = shift; |
#my $logger = shift; |
377 |
#my $logger = shift; |
$logger->remove($name); |
|
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$logger->remove($name); |
|
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|
378 |
} |
} |
379 |
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|
380 |
sub getDbName { |
sub getDbName { |
385 |
return $database_name; |
return $database_name; |
386 |
} |
} |
387 |
|
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sub testDsn { |
|
|
my $self = shift; |
|
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my $dsn = $self->{locator}->{dbi}->{dsn}; |
|
|
my $result; |
|
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if ( my $dbh = DBI->connect($dsn, '', '', { |
|
|
PrintError => 0, |
|
|
} ) ) { |
|
|
$dbh->disconnect(); |
|
|
return 1; |
|
|
} else { |
|
|
$logger->warning( __PACKAGE__ . "[$self->{locator}->{type}]" . "->testDsn(): " . "DBI-error: " . $DBI::errstr ); |
|
|
} |
|
|
} |
|
|
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|
388 |
sub testAvailability { |
sub testAvailability { |
389 |
my $self = shift; |
my $self = shift; |
390 |
my $status = $self->testDsn(); |
my $status = $self->testDsn(); |
392 |
return $status; |
return $status; |
393 |
} |
} |
394 |
|
|
395 |
sub createDb { |
sub isConnected { |
396 |
my $self = shift; |
my $self = shift; |
397 |
my $dsn = $self->{locator}->{dbi}->{dsn}; |
# TODO: REVIEW! |
398 |
|
return 1 if $self->{STORAGEHANDLE}; |
|
$logger->debug( __PACKAGE__ . "->createDb( dsn $dsn )" ); |
|
|
|
|
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$dsn =~ s/database=(.+?);//; |
|
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my $database_name = $1; |
|
|
|
|
|
my $ok; |
|
|
|
|
|
if ( my $dbh = DBI->connect($dsn, '', '', { |
|
|
PrintError => 0, |
|
|
} ) ) { |
|
|
if ($database_name) { |
|
|
if ($dbh->do("CREATE DATABASE $database_name;")) { |
|
|
$ok = 1; |
|
|
} |
|
|
} |
|
|
$dbh->disconnect(); |
|
|
} |
|
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|
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|
return $ok; |
|
|
|
|
399 |
} |
} |
400 |
|
|
401 |
sub dropDb { |
sub testDsn { |
402 |
my $self = shift; |
my $self = shift; |
403 |
my $dsn = $self->{locator}->{dbi}->{dsn}; |
my $dsn = $self->{locator}->{dbi}->{dsn}; |
404 |
|
my $result; |
|
$logger->debug( __PACKAGE__ . "->dropDb( dsn $dsn )" ); |
|
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|
$dsn =~ s/database=(.+?);//; |
|
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my $database_name = $1; |
|
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my $ok; |
|
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|
405 |
if ( my $dbh = DBI->connect($dsn, '', '', { |
if ( my $dbh = DBI->connect($dsn, '', '', { |
406 |
PrintError => 0, |
PrintError => 0, |
407 |
} ) ) { |
} ) ) { |
408 |
if ($database_name) { |
|
409 |
if ($dbh->do("DROP DATABASE $database_name;")) { |
# TODO: REVIEW |
|
$ok = 1; |
|
|
} |
|
|
} |
|
410 |
$dbh->disconnect(); |
$dbh->disconnect(); |
411 |
|
|
412 |
|
return 1; |
413 |
|
} else { |
414 |
|
$logger->warning( __PACKAGE__ . "[$self->{locator}->{type}]" . "->testDsn(): " . "DBI-error: " . $DBI::errstr ); |
415 |
} |
} |
|
|
|
|
return $ok; |
|
|
} |
|
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|
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sub isConnected { |
|
|
my $self = shift; |
|
|
return 1 if $self->{STORAGEHANDLE}; |
|
416 |
} |
} |
417 |
|
|
418 |
1; |
1; |
421 |
|
|
422 |
=head1 DESCRIPTION |
=head1 DESCRIPTION |
423 |
|
|
424 |
Data::Storage is module for a accessing various "data structures" stored inside |
=head2 Data::Storage |
|
various "data containers". It sits on top of DBI and/or Tangram. |
|
425 |
|
|
426 |
|
Data::Storage is a module for accessing various "data structures / kinds of structured data" stored inside |
427 |
|
various "data containers". |
428 |
|
We tried to use the AdapterPattern (http://c2.com/cgi/wiki?AdapterPattern) to implement a wrapper-layer |
429 |
|
around core CPAN modules (Tangram, DBI). |
430 |
|
|
431 |
|
=head2 Why? |
432 |
|
|
433 |
|
You will get a better code-structure (not bad for later maintenance) in growing Perl code projects, |
434 |
|
especially when using multiple database connections at the same time. |
435 |
|
You will be able to switch between different _kinds_ of implementations used for storing data. |
436 |
|
Your code will use the very same API to access these storage layers. |
437 |
|
... implementation has to be changed for now |
438 |
|
Maybe you will be able to switch "on-the-fly" without changing any bits in code in the future.... |
439 |
|
... but that's not the focus |
440 |
|
|
441 |
=head1 AUTHORS / COPYRIGHT |
=head2 What else? |
442 |
|
|
443 |
|
Having this, we were able to do implement a generic data synchronization module more easy, |
444 |
|
please look at Data::Transfer. |
445 |
|
|
|
The Data::Storage module is Copyright (c) 2002 Andreas Motl. |
|
|
All rights reserved. |
|
446 |
|
|
447 |
You may distribute it under the terms of either the GNU General Public |
=head1 AUTHORS / COPYRIGHT |
448 |
License or the Artistic License, as specified in the Perl README file. |
|
449 |
|
The Data::Storage module is Copyright (c) 2002 Andreas Motl. |
450 |
|
All rights reserved. |
451 |
|
You may distribute it under the terms of either the GNU General Public |
452 |
|
License or the Artistic License, as specified in the Perl README file. |
453 |
|
|
454 |
|
|
455 |
=head1 ACKNOWLEDGEMENTS |
=head1 ACKNOWLEDGEMENTS |
456 |
|
|
457 |
Larry Wall for Perl, Tim Bunce for DBI, Jean-Louis Leroy for Tangram and Set::Object, |
Larry Wall for Perl, Tim Bunce for DBI, Jean-Louis Leroy for Tangram and Set::Object, |
458 |
Sam Vilain for Class::Tangram, Adam Spiers for MySQL::Diff and all contributors. |
Sam Vilain for Class::Tangram, Jochen Wiedmann and Jeff Zucker for DBD::CSV & Co., |
459 |
|
Adam Spiers for MySQL::Diff and all contributors. |
460 |
|
|
461 |
|
|
462 |
=head1 SUPPORT / WARRANTY |
=head1 SUPPORT / WARRANTY |
463 |
|
|
464 |
Data::Storage is free software. IT COMES WITHOUT WARRANTY OF ANY KIND. |
Data::Storage is free software. IT COMES WITHOUT WARRANTY OF ANY KIND. |
465 |
|
|
466 |
|
|
467 |
=head1 TODO |
=head1 TODO |
468 |
|
|
469 |
|
|
470 |
=head2 Handle the following errors/cases: |
=head2 BUGS |
471 |
|
|
472 |
|
"DBI-Error [Tangram]: DBD::mysql::st execute failed: Unknown column 't1.requestdump' in 'field list'" |
473 |
|
|
474 |
=head3 "DBI-Error [Tangram]: DBD::mysql::st execute failed: Unknown column 't1.requestdump' in 'field list'" |
... occours when operating on object-attributes not introduced yet: |
475 |
|
this should be detected and appended/replaced through: |
476 |
|
"Schema-Error detected, maybe (just) an inconsistency. |
477 |
|
Please check if your declaration in schema-module "a" matches structure in database "b" or try to run" |
478 |
|
db_setup.pl --dbkey=import --action=deploy |
479 |
|
|
|
... occours when operating on object-attributes not introduced yet: |
|
|
this should be detected and appended/replaced through: |
|
|
"Schema-Error detected, maybe (just) an inconsistency. |
|
|
Please check if your declaration in schema-module "a" matches structure in database "b" or try to run" |
|
|
db_setup.pl --dbkey=import --action=deploy |
|
480 |
|
|
481 |
=head3 Compare schema (structure diff) with database ... |
Compare schema (structure diff) with database ... |
482 |
|
|
483 |
... when issuing "db_setup.pl --dbkey=import --action=deploy" |
... when issuing "db_setup.pl --dbkey=import --action=deploy" |
484 |
on a database with an already deployed schema, use an additional "--update" then |
on a database with an already deployed schema, use an additional "--update" then |
507 |
automatically and this is believed to be the most common case under normal circumstances. |
automatically and this is believed to be the most common case under normal circumstances. |
508 |
|
|
509 |
|
|
510 |
=head2 Introduce some features: |
=head2 FEATURES |
511 |
|
|
512 |
- Get this stuff together with UML (Unified Modeling Language) and/or standards from ODMG. |
- Get this stuff together with UML (Unified Modeling Language) and/or standards from ODMG. |
513 |
- Make it possible to load/save schemas in XMI (XML Metadata Interchange), |
- Make it possible to load/save schemas in XMI (XML Metadata Interchange), |
515 |
Integrate/bundle this with a web-/html-based UML modeling tool or |
Integrate/bundle this with a web-/html-based UML modeling tool or |
516 |
some other interesting stuff like the "Co-operative UML Editor" from Uni Darmstadt. (web-/java-based) |
some other interesting stuff like the "Co-operative UML Editor" from Uni Darmstadt. (web-/java-based) |
517 |
- Enable Round Trip Engineering. Keep code and diagrams in sync. Don't annoy/bother the programmers. |
- Enable Round Trip Engineering. Keep code and diagrams in sync. Don't annoy/bother the programmers. |
518 |
- Add some more handlers: |
- Add support for some more handlers/locators to be able to |
519 |
- look at DBD::CSV, Text::CSV, XML::CSV, XML::Excel |
access the following standards/protocols/interfaces/programs/apis transparently: |
520 |
- Add some more locations/locators: |
+ DBD::CSV (via Data::Storage::Handler::DBI) |
521 |
- PerlDAV: http://www.webdav.org/perldav/ |
(-) Text::CSV, XML::CSV, XML::Excel |
522 |
- Move to t3, use InCASE |
- MAPI |
523 |
|
- LDAP |
524 |
|
- DAV (look at PerlDAV: http://www.webdav.org/perldav/) |
525 |
|
- Mbox (use formail for seperating/splitting entries/nodes) |
526 |
|
- Cyrus (cyrdeliver - what about cyrretrieve (export)???) |
527 |
|
- use File::DiffTree, use File::Compare |
528 |
|
- Hibernate |
529 |
|
- "Win32::UserAccountDb" |
530 |
|
- "*nix::UserAccountDb" |
531 |
|
- .wab - files (Windows Address Book) |
532 |
|
- .pst - files (Outlook Post Storage?) |
533 |
|
- XML (e.g. via XML::Simple?) |
534 |
|
- Move to t3, look at InCASE |
535 |
|
- some kind of security layer for methods/objects |
536 |
|
- acls (stored via tangram/ldap?) for functions, methods and objects (entity- & data!?) |
537 |
|
- where are the hooks needed then? |
538 |
|
- is Data::Storage & Co. okay, or do we have to touch the innards of DBI and/or Tangram? |
539 |
|
- an attempt to start could be: |
540 |
|
- 'sub getACLByObjectId($id, $context)' |
541 |
|
- 'sub getACLByMethodname($id, $context)' |
542 |
|
- 'sub getACLByName($id, $context)' |
543 |
|
( would require a kinda registry to look up these very names pointing to arbitrary locations (code, data, ...) ) |
544 |
|
- add more hooks and various levels |
545 |
|
- better integrate introduced 'getObjectByGuid'-mechanism from Data::Storage::Handler::Tangram |
546 |
|
|
547 |
|
|
548 |
=head3 Links: |
=head3 LINKS / REFERENCES |
549 |
|
|
550 |
Specs: |
Specs: |
551 |
UML 1.3 Spec: http://cgi.omg.org/cgi-bin/doc?ad/99-06-08.pdf |
UML 1.3 Spec: http://cgi.omg.org/cgi-bin/doc?ad/99-06-08.pdf |