1 |
# $Id$ |
## ------------------------------------------------------------------------ |
2 |
# |
## |
3 |
# Copyright (c) 2002 Andreas Motl <andreas.motl@ilo.de> |
## $Id$ |
4 |
# |
## |
5 |
# See COPYRIGHT section in pod text below for usage and distribution rights. |
## Copyright (c) 2002 Andreas Motl <andreas.motl@ilo.de> |
6 |
# |
## |
7 |
############################################ |
## See COPYRIGHT section in pod text below for usage and distribution rights. |
8 |
# |
## |
9 |
# $Log$ |
## ------------------------------------------------------------------------ |
10 |
# Revision 1.11 2002/12/11 06:53:19 joko |
## |
11 |
# + updated pod |
## $Log$ |
12 |
# |
## Revision 1.20 2003/06/25 22:51:51 joko |
13 |
# Revision 1.10 2002/12/07 03:37:23 joko |
## + sub get_locator_type & Co. |
14 |
# + updated pod |
## |
15 |
# |
## Revision 1.19 2003/02/18 19:22:11 joko |
16 |
# Revision 1.9 2002/12/01 22:15:45 joko |
## + fixed logging |
17 |
# - sub createDb: moved to handler |
## |
18 |
# |
## Revision 1.18 2003/01/30 22:12:17 joko |
19 |
# Revision 1.8 2002/11/29 04:48:23 joko |
## - removed/refactored old code: ->Data::Storage::Handler::Tangram|DBI |
20 |
# + updated pod |
## |
21 |
# |
## Revision 1.17 2003/01/30 21:42:22 joko |
22 |
# Revision 1.7 2002/11/17 06:07:18 joko |
## + minor update: renamed method |
23 |
# + creating the handler is easier than proposed first - for now :-) |
## |
24 |
# + sub testAvailability |
## Revision 1.16 2003/01/20 16:52:13 joko |
25 |
# |
## + now using 'DesignPattern::Object' to create a new 'Data::Storage::Handler::Xyz' on demand - before we did this in a hand-rolled fashion |
26 |
# Revision 1.6 2002/11/09 01:04:58 joko |
## |
27 |
# + updated pod |
## Revision 1.15 2003/01/19 03:12:59 joko |
28 |
# |
## + modified header |
29 |
# Revision 1.5 2002/10/29 19:24:18 joko |
## - removed pod-documentation - now in 'Storage.pod' |
30 |
# - reduced logging |
## |
31 |
# + added some pod |
## Revision 1.14 2002/12/19 16:27:59 joko |
32 |
# |
## - moved 'sub dropDb' to Data::Storage::Handler::DBI |
33 |
# Revision 1.4 2002/10/27 18:35:07 joko |
## |
34 |
# + added pod |
## Revision 1.13 2002/12/17 21:54:12 joko |
35 |
# |
## + feature when using Tangram: |
36 |
# Revision 1.3 2002/10/25 11:40:37 joko |
## + what? each object created should delivered with a globally(!?) unique identifier (GUID) besides the native tangram object id (OID) |
37 |
# + enhanced robustness |
## + patched Tangram::Storage (jonen) |
38 |
# + more logging for debug-levels |
## + enhanced Data::Storage::Schema::Tangram (joko) |
39 |
# + sub dropDb |
## + enhanced Data::Storage::Handler::Tangram 'sub getObjectByGuid' (jonen) |
40 |
# |
## + how? |
41 |
# Revision 1.2 2002/10/17 00:04:29 joko |
## + each concrete (non-abstract) class gets injected with an additional field/property called 'guid' - this is done (dynamically) on schema level |
42 |
# + sub createDb |
## + this property ('guid') gets filled on object creation/insertion from 'sub Tangram::Storage::_insert' using Data::UUID from CPAN |
43 |
# + sub isConnected |
## + (as for now) this property can get accessed by calling 'getObjectByGuid' on the already known storage-handle used throughout the application |
44 |
# + bugfixes regarding "deep recursion" stuff |
## |
45 |
# |
## Revision 1.12 2002/12/12 02:50:15 joko |
46 |
# Revision 1.1 2002/10/10 03:43:12 cvsjoko |
## + this now (unfortunately) needs DBI for some helper functions |
47 |
# + new |
## + TODO: these have to be refactored to another scope! (soon!) |
48 |
# |
## |
49 |
############################################ |
## Revision 1.11 2002/12/11 06:53:19 joko |
50 |
|
## + updated pod |
51 |
|
## |
52 |
|
## Revision 1.10 2002/12/07 03:37:23 joko |
53 |
|
## + updated pod |
54 |
|
## |
55 |
|
## Revision 1.9 2002/12/01 22:15:45 joko |
56 |
|
## - sub createDb: moved to handler |
57 |
|
## |
58 |
|
## Revision 1.8 2002/11/29 04:48:23 joko |
59 |
|
## + updated pod |
60 |
|
## |
61 |
|
## Revision 1.7 2002/11/17 06:07:18 joko |
62 |
|
## + creating the handler is easier than proposed first - for now :-) |
63 |
|
## + sub testAvailability |
64 |
|
## |
65 |
|
## Revision 1.6 2002/11/09 01:04:58 joko |
66 |
|
## + updated pod |
67 |
|
## |
68 |
|
## Revision 1.5 2002/10/29 19:24:18 joko |
69 |
|
## - reduced logging |
70 |
|
## + added some pod |
71 |
|
## |
72 |
|
## Revision 1.4 2002/10/27 18:35:07 joko |
73 |
|
## + added pod |
74 |
|
## |
75 |
|
## Revision 1.3 2002/10/25 11:40:37 joko |
76 |
|
## + enhanced robustness |
77 |
|
## + more logging for debug-levels |
78 |
|
## + sub dropDb |
79 |
|
## |
80 |
|
## Revision 1.2 2002/10/17 00:04:29 joko |
81 |
|
## + sub createDb |
82 |
|
## + sub isConnected |
83 |
|
## + bugfixes regarding "deep recursion" stuff |
84 |
|
## |
85 |
|
## Revision 1.1 2002/10/10 03:43:12 cvsjoko |
86 |
|
## + new |
87 |
|
## ------------------------------------------------------------------------ |
88 |
|
|
89 |
|
|
90 |
BEGIN { |
BEGIN { |
91 |
$Data::Storage::VERSION = 0.02; |
$Data::Storage::VERSION = 0.03; |
92 |
} |
} |
93 |
|
|
|
|
|
|
=head1 NAME |
|
|
|
|
|
Data::Storage - Interface for accessing various Storage implementations for Perl in an independent way |
|
|
|
|
|
|
|
|
=head1 AIMS |
|
|
|
|
|
- should encapsulate Tangram, DBI, DBD::CSV and LWP:: to access them in an unordinary (more convenient) way ;) |
|
|
- introduce a generic layered structure, refactor *SUBLAYER*-stuff, make (e.g.) this possible: |
|
|
Perl Data::Storage[DBD::CSV] -> Perl LWP:: -> Internet HTTP/FTP/* -> Host Daemon -> csv-file |
|
|
- provide generic synchronization mechanisms across arbitrary/multiple storages based on ident/checksum |
|
|
maybe it's possible to have schema-, structural- and semantical modifications synchronized??? |
|
|
|
|
|
|
|
|
=head1 SYNOPSIS |
|
|
|
|
|
=head2 BASIC ACCESS |
|
|
|
|
|
=head2 ADVANCED ACCESS |
|
|
|
|
|
... via inheritance: |
|
|
|
|
|
use Data::Storage; |
|
|
my $proxyObj = new HttpProxy; |
|
|
$proxyObj->{url} = $url; |
|
|
$proxyObj->{payload} = $content; |
|
|
$self->{storage}->insert($proxyObj); |
|
|
|
|
|
use Data::Storage; |
|
|
my $proxyObj = HttpProxy->new( |
|
|
url => $url, |
|
|
payload => $content, |
|
|
); |
|
|
$self->{storage}->insert($proxyObj); |
|
|
|
|
|
|
|
|
=head2 SYNCHRONIZATION |
|
|
|
|
|
my $nodemapping = { |
|
|
'LangText' => 'langtexts.csv', |
|
|
'Currency' => 'currencies.csv', |
|
|
'Country' => 'countries.csv', |
|
|
}; |
|
|
|
|
|
my $propmapping = { |
|
|
'LangText' => [ |
|
|
[ 'source:lcountrykey' => 'target:country' ], |
|
|
[ 'source:lkey' => 'target:key' ], |
|
|
[ 'source:lvalue' => 'target:text' ], |
|
|
], |
|
|
'Currency' => [ |
|
|
[ 'source:ckey' => 'target:key' ], |
|
|
[ 'source:cname' => 'target:text' ], |
|
|
], |
|
|
'Country' => [ |
|
|
[ 'source:ckey' => 'target:key' ], |
|
|
[ 'source:cname' => 'target:text' ], |
|
|
], |
|
|
}; |
|
|
|
|
|
sub syncResource { |
|
|
|
|
|
my $self = shift; |
|
|
my $node_source = shift; |
|
|
my $mode = shift; |
|
|
my $opts = shift; |
|
|
|
|
|
$mode ||= ''; |
|
|
$opts->{erase} ||= 0; |
|
|
|
|
|
$logger->info( __PACKAGE__ . "->syncResource( node_source $node_source mode $mode erase $opts->{erase} )"); |
|
|
|
|
|
# resolve metadata for syncing requested resource |
|
|
my $node_target = $nodemapping->{$node_source}; |
|
|
my $mapping = $propmapping->{$node_source}; |
|
|
|
|
|
if (!$node_target || !$mapping) { |
|
|
# loggger.... "no target, sorry!" |
|
|
print "error while resolving resource metadata", "\n"; |
|
|
return; |
|
|
} |
|
|
|
|
|
if ($opts->{erase}) { |
|
|
$self->_erase_all($node_source); |
|
|
} |
|
|
|
|
|
# create new sync object |
|
|
my $sync = Data::Transfer::Sync->new( |
|
|
storages => { |
|
|
L => $self->{bizWorks}->{backend}, |
|
|
R => $self->{bizWorks}->{resources}, |
|
|
}, |
|
|
id_authorities => [qw( L ) ], |
|
|
checksum_authorities => [qw( L ) ], |
|
|
write_protected => [qw( R ) ], |
|
|
verbose => 1, |
|
|
); |
|
|
|
|
|
# sync |
|
|
# todo: filter!? |
|
|
$sync->syncNodes( { |
|
|
direction => $mode, # | +PUSH | +PULL | -FULL | +IMPORT | -EXPORT |
|
|
method => 'checksum', # | -timestamp | -manual |
|
|
source => "L:$node_source", |
|
|
source_ident => 'storage_method:id', |
|
|
source_exclude => [qw( id cs )], |
|
|
target => "R:$node_target", |
|
|
target_ident => 'property:oid', |
|
|
mapping => $mapping, |
|
|
} ); |
|
|
|
|
|
} |
|
|
|
|
|
|
|
|
=head2 NOTE |
|
|
|
|
|
This module heavily relies on DBI and Tangram, but adds a lot of additional bugs and quirks. |
|
|
Please look at their documentation and/or this code for additional information. |
|
|
|
|
|
|
|
|
=head1 REQUIREMENTS |
|
|
|
|
|
For full functionality: |
|
|
DBI from CPAN |
|
|
DBD::mysql from CPAN |
|
|
Tangram 2.04 from CPAN (hmmm, 2.04 won't do in some cases) |
|
|
Tangram 2.05 from http://... (2.05 seems okay but there are also additional patches from our side) |
|
|
Class::Tangram from CPAN |
|
|
DBD::CSV from CPAN |
|
|
MySQL::Diff from http://adamspiers.org/computing/mysqldiff/ |
|
|
... and all their dependencies |
|
|
|
|
|
=cut |
|
|
|
|
|
# The POD text continues at the end of the file. |
|
|
|
|
|
|
|
94 |
package Data::Storage; |
package Data::Storage; |
95 |
|
|
96 |
use strict; |
use strict; |
97 |
use warnings; |
use warnings; |
98 |
|
|
|
use Data::Storage::Locator; |
|
99 |
use Data::Dumper; |
use Data::Dumper; |
100 |
|
# FIXME: wipe out! |
101 |
|
use DBI; |
102 |
|
|
103 |
|
use Data::Storage::Locator; |
104 |
|
use DesignPattern::Object; |
105 |
|
|
106 |
|
|
107 |
# TODO: actually implement level (integrate with Log::Dispatch) |
# TODO: actually implement level (integrate with Log::Dispatch) |
108 |
my $TRACELEVEL = 0; |
my $TRACELEVEL = 0; |
117 |
|
|
118 |
my $arg_locator = shift; |
my $arg_locator = shift; |
119 |
my $arg_options = shift; |
my $arg_options = shift; |
120 |
|
#my @args = @_; |
121 |
|
#@args ||= (); |
122 |
|
|
123 |
|
if (!$arg_locator) { |
124 |
|
$logger->critical( __PACKAGE__ . "->new: No locator passed in!" ); |
125 |
|
return; |
126 |
|
} |
127 |
|
|
128 |
|
#print Dumper($arg_locator); |
129 |
|
|
130 |
#my $self = { STORAGEHANDLE => undef, @_ }; |
#my $self = { STORAGEHANDLE => undef, @_ }; |
131 |
my $self = { STORAGEHANDLE => undef, locator => $arg_locator, options => $arg_options }; |
my $self = { STORAGEHANDLE => undef, locator => $arg_locator, options => $arg_options }; |
132 |
#$logger->debug( __PACKAGE__ . "[$self->{locator}->{type}]" . "->new(@_)" ); |
#$logger->debug( __PACKAGE__ . "[$self->{locator}->{type}]" . "->new(@_)" ); |
133 |
$logger->debug( __PACKAGE__ . "[$arg_locator->{type}]" . "->new(@_)" ); |
$logger->debug( __PACKAGE__ . "[$arg_locator->{type}]" . "->new()" ); |
134 |
return bless $self, $class; |
return bless $self, $class; |
135 |
} |
} |
136 |
|
|
152 |
my $method = $AUTOLOAD; |
my $method = $AUTOLOAD; |
153 |
$method =~ s/^.*:://; |
$method =~ s/^.*:://; |
154 |
|
|
155 |
|
#print __PACKAGE__, "\n"; |
156 |
|
#print $method, "\n"; |
157 |
|
#print $self->{locator}, "\n"; |
158 |
|
|
159 |
|
my $locator_type = $self->get_locator_type(); |
160 |
|
|
161 |
# advanced logging of AUTOLOAD calls ... |
# advanced logging of AUTOLOAD calls ... |
162 |
# ... nice but do it only when TRACING (TODO) is enabled |
# ... nice but do it only when TRACING (TODO) is enabled |
|
if ($TRACELEVEL) { |
|
163 |
my $logstring = ""; |
my $logstring = ""; |
164 |
$logstring .= __PACKAGE__ . "[$self->{locator}->{type}]" . "->" . $method; |
$logstring .= __PACKAGE__ . "[$locator_type]" . "->" . $method; |
165 |
#print "count: ", $#_, "\n"; |
#print "count: ", $#_, "\n"; |
166 |
#$logstring .= Dumper(@_) if ($#_ != -1); |
#$logstring .= Dumper(@_) if ($#_ != -1); |
167 |
my $tabcount = int( (80 - length($logstring)) / 10 ); |
my $tabcount = int( (80 - length($logstring)) / 10 ); |
169 |
# TODO: only ok if logstring doesn't contain |
# TODO: only ok if logstring doesn't contain |
170 |
# e.g. "Data::Storage[Tangram]->insert(SystemEvent=HASH(0x5c0034c)) (AUTOLOAD)" |
# e.g. "Data::Storage[Tangram]->insert(SystemEvent=HASH(0x5c0034c)) (AUTOLOAD)" |
171 |
# 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 ;) |
172 |
|
if ($TRACELEVEL) { |
173 |
$logger->debug( $logstring ); |
$logger->debug( $logstring ); |
174 |
#print join('; ', @_); |
#print join('; ', @_); |
175 |
} |
} |
176 |
|
|
177 |
# filtering AUTOLOAD calls and first-time-touch of the actual storage impl |
# filtering AUTOLOAD calls and first-time-touch of the actual storage impl |
178 |
if ($self->_filter_AUTOLOAD($method)) { |
if ($self->_filter_AUTOLOAD($method)) { |
179 |
#print "_accessStorage\n"; |
#print "=== FILTER!", "\n"; |
180 |
$self->_accessStorage(); |
$self->_accessStorageHandle(); |
181 |
$self->{STORAGEHANDLE}->$method(@_); |
if ($self->{STORAGEHANDLE}) { |
182 |
|
return $self->{STORAGEHANDLE}->$method(@_); |
183 |
|
} else { |
184 |
|
my $msg = __PACKAGE__ . "->AUTOLOAD: ERROR: " . $logstring; |
185 |
|
$logger->critical( $msg ) if $logger; |
186 |
|
print STDERR $msg if not $logger; |
187 |
|
return; |
188 |
|
} |
189 |
} |
} |
190 |
|
|
191 |
} |
} |
202 |
} |
} |
203 |
|
|
204 |
|
|
205 |
sub normalizeArgs { |
sub _accessStorageHandle { |
|
my %args = @_; |
|
|
if (!$args{dsn} && $args{meta}{dsn}) { |
|
|
$args{dsn} = $args{meta}{dsn}; |
|
|
} |
|
|
my @result = %args; |
|
|
return @result; |
|
|
} |
|
|
|
|
|
sub _accessStorage { |
|
206 |
my $self = shift; |
my $self = shift; |
207 |
# TODO: to some tracelevel! |
# TODO: to some tracelevel! |
208 |
|
#print "=========== _accessStorage", "\n"; |
209 |
if ($TRACELEVEL) { |
if ($TRACELEVEL) { |
210 |
$logger->debug( __PACKAGE__ . "[$self->{locator}->{type}]" . "->_accessStorage()" ); |
$logger->debug( __PACKAGE__ . "[$self->{locator}->{type}]" . "->_accessStorageHandle()" ); |
211 |
} |
} |
212 |
if (!$self->{STORAGEHANDLE}) { |
if (!$self->{STORAGEHANDLE}) { |
213 |
$self->_createStorageHandle(); |
return $self->_createStorageHandle(); |
214 |
} |
} |
215 |
} |
} |
216 |
|
|
217 |
sub _createStorageHandle { |
sub _createStorageHandle1 { |
218 |
my $self = shift; |
my $self = shift; |
219 |
my $type = $self->{locator}->{type}; |
my $type = $self->{locator}->{type}; |
220 |
$logger->debug( __PACKAGE__ . "[$type]" . "->_createStorageHandle()" ); |
$logger->debug( __PACKAGE__ . "[$type]" . "->_createStorageHandle()" ); |
240 |
|
|
241 |
} |
} |
242 |
|
|
243 |
|
sub _createStorageHandle { |
244 |
|
my $self = shift; |
245 |
|
|
246 |
|
# 2003-06-18: protection against storagehandles w/o locators |
247 |
|
return if not defined $self->{locator}; |
248 |
|
|
249 |
|
my $type = $self->get_locator_type(); |
250 |
|
$logger->debug( __PACKAGE__ . "[$type]" . "->_createStorageHandle()" ); |
251 |
|
|
252 |
|
#print Dumper($self); |
253 |
|
#exit; |
254 |
|
|
255 |
|
my $pkg = "Data::Storage::Handler::" . $type . ""; |
256 |
|
|
257 |
|
# try to load perl module at runtime |
258 |
|
=pod |
259 |
|
my $evalstr = "use $pkg;"; |
260 |
|
eval($evalstr); |
261 |
|
if ($@) { |
262 |
|
$logger->error( __PACKAGE__ . "[$type]" . "->_createStorageHandle(): $@" ); |
263 |
|
return; |
264 |
|
} |
265 |
|
|
266 |
|
# build up some additional arguments to pass on |
267 |
|
#my @args = %{$self->{locator}}; |
268 |
|
my @args = (); |
269 |
|
|
270 |
|
# - create new storage handle object |
271 |
|
# - propagate arguments to handler |
272 |
|
# - pass locator by reference to be able to store status- or meta-information in it |
273 |
|
$self->{STORAGEHANDLE} = $pkg->new( locator => $self->{locator}, @args ); |
274 |
|
=cut |
275 |
|
|
276 |
|
$self->{STORAGEHANDLE} = DesignPattern::Object->fromPackage( $pkg, locator => $self->{locator} ); |
277 |
|
return 1; |
278 |
|
|
279 |
|
} |
280 |
|
|
281 |
sub addLogDispatchHandler { |
sub addLogDispatchHandler { |
282 |
|
|
283 |
my $self = shift; |
my $self = shift; |
313 |
$logger->remove($name); |
$logger->remove($name); |
314 |
} |
} |
315 |
|
|
316 |
sub getDbName { |
sub get_locator_type { |
317 |
my $self = shift; |
my $self = shift; |
318 |
my $dsn = $self->{locator}->{dbi}->{dsn}; |
my $locator_type = ''; |
319 |
$dsn =~ m/database=(.+?);/; |
$locator_type = $self->{locator}->{type} if defined $self->{locator}; |
320 |
my $database_name = $1; |
return $locator_type; |
|
return $database_name; |
|
|
} |
|
|
|
|
|
sub testDsn { |
|
|
my $self = shift; |
|
|
my $dsn = $self->{locator}->{dbi}->{dsn}; |
|
|
my $result; |
|
|
if ( my $dbh = DBI->connect($dsn, '', '', { |
|
|
PrintError => 0, |
|
|
} ) ) { |
|
|
|
|
|
# TODO: REVIEW |
|
|
$dbh->disconnect(); |
|
|
|
|
|
return 1; |
|
|
} else { |
|
|
$logger->warning( __PACKAGE__ . "[$self->{locator}->{type}]" . "->testDsn(): " . "DBI-error: " . $DBI::errstr ); |
|
|
} |
|
|
} |
|
|
|
|
|
sub testAvailability { |
|
|
my $self = shift; |
|
|
my $status = $self->testDsn(); |
|
|
$self->{locator}->{status}->{available} = $status; |
|
|
return $status; |
|
|
} |
|
|
|
|
|
|
|
|
sub dropDb { |
|
|
my $self = shift; |
|
|
my $dsn = $self->{locator}->{dbi}->{dsn}; |
|
|
|
|
|
$logger->debug( __PACKAGE__ . "->dropDb( dsn $dsn )" ); |
|
|
|
|
|
$dsn =~ s/database=(.+?);//; |
|
|
my $database_name = $1; |
|
|
|
|
|
my $ok; |
|
|
|
|
|
if ( my $dbh = DBI->connect($dsn, '', '', { |
|
|
PrintError => 0, |
|
|
} ) ) { |
|
|
if ($database_name) { |
|
|
if ($dbh->do("DROP DATABASE $database_name;")) { |
|
|
$ok = 1; |
|
|
} |
|
|
} |
|
|
|
|
|
$dbh->disconnect(); |
|
|
|
|
|
} |
|
|
|
|
|
return $ok; |
|
|
} |
|
|
|
|
|
sub isConnected { |
|
|
my $self = shift; |
|
|
return 1 if $self->{STORAGEHANDLE}; |
|
321 |
} |
} |
322 |
|
|
323 |
1; |
1; |
324 |
__END__ |
__END__ |
|
|
|
|
|
|
|
=head1 DESCRIPTION |
|
|
|
|
|
=head2 Data::Storage |
|
|
|
|
|
Data::Storage is a module for accessing various "data structures / kinds of structured data" stored inside |
|
|
various "data containers". |
|
|
We tried to use the AdapterPattern (http://c2.com/cgi/wiki?AdapterPattern) to implement a wrapper-layer |
|
|
around core CPAN modules (Tangram, DBI). |
|
|
|
|
|
=head2 Why? |
|
|
|
|
|
You will get a better code-structure (not bad for later maintenance) in growing Perl code projects, |
|
|
especially when using multiple database connections at the same time. |
|
|
You will be able to switch between different _kinds_ of implementations used for storing data. |
|
|
Your code will use the very same API to access these storage layers. |
|
|
... implementation has to be changed for now |
|
|
Maybe you will be able to switch "on-the-fly" without changing any bits in code in the future.... |
|
|
... but that's not the focus |
|
|
|
|
|
=head2 What else? |
|
|
|
|
|
Having this, we were able to do implement a generic data synchronization module more easy, |
|
|
please look at Data::Transfer. |
|
|
|
|
|
|
|
|
=head1 AUTHORS / COPYRIGHT |
|
|
|
|
|
The Data::Storage module is Copyright (c) 2002 Andreas Motl. |
|
|
All rights reserved. |
|
|
You may distribute it under the terms of either the GNU General Public |
|
|
License or the Artistic License, as specified in the Perl README file. |
|
|
|
|
|
|
|
|
=head1 ACKNOWLEDGEMENTS |
|
|
|
|
|
Larry Wall for Perl, Tim Bunce for DBI, Jean-Louis Leroy for Tangram and Set::Object, |
|
|
Sam Vilain for Class::Tangram, Jochen Wiedmann and Jeff Zucker for DBD::CSV & Co., |
|
|
Adam Spiers for MySQL::Diff and all contributors. |
|
|
|
|
|
|
|
|
=head1 SUPPORT / WARRANTY |
|
|
|
|
|
Data::Storage is free software. IT COMES WITHOUT WARRANTY OF ANY KIND. |
|
|
|
|
|
|
|
|
=head1 TODO |
|
|
|
|
|
|
|
|
=head2 BUGS |
|
|
|
|
|
"DBI-Error [Tangram]: DBD::mysql::st execute failed: Unknown column 't1.requestdump' in 'field list'" |
|
|
|
|
|
... 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 |
|
|
|
|
|
|
|
|
Compare schema (structure diff) with database ... |
|
|
|
|
|
... when issuing "db_setup.pl --dbkey=import --action=deploy" |
|
|
on a database with an already deployed schema, use an additional "--update" then |
|
|
to lift the schema inside the database to the current declared schema. |
|
|
You will have to approve removals and changes on field-level while |
|
|
new objects and new fields are introduced silently without any interaction needed. |
|
|
In future versions there may be additional options to control silent processing of |
|
|
removals and changes. |
|
|
See this CRUD-table applying to the actions occouring on Classes and Class variables when deploying schemas, |
|
|
don't mix this up with CRUD-actions on Objects, these are already handled by (e.g.) Tangram itself. |
|
|
Classes: |
|
|
C create -> yes, handled automatically |
|
|
R retrieve -> no, not subject of this aspect since it is about deployment only |
|
|
U update -> yes, automatically for Class meta-attributes, yes/no for Class variables (look at the rules down here) |
|
|
D delete -> yes, just by user-interaction |
|
|
Class variables: |
|
|
C create -> yes, handled automatically |
|
|
R retrieve -> no, not subject of this aspect since it is about deployment only |
|
|
U update -> yes, just by user-interaction; maybe automatically if it can be determined that data wouldn't be lost |
|
|
D delete -> yes, just by user-interaction |
|
|
|
|
|
It's all about not to be able to loose data simply while this is in pre-alpha stage. |
|
|
And loosing data by being able to modify and redeploy schemas easily is definitely quite easy. |
|
|
|
|
|
As we can see, creations of Classes and new Class variables is handled |
|
|
automatically and this is believed to be the most common case under normal circumstances. |
|
|
|
|
|
|
|
|
=head2 FEATURES |
|
|
|
|
|
- Get this stuff together with UML (Unified Modeling Language) and/or standards from ODMG. |
|
|
- Make it possible to load/save schemas in XMI (XML Metadata Interchange), |
|
|
which seems to be most commonly used today, perhaps handle objects with OIFML. |
|
|
Integrate/bundle this with a web-/html-based UML modeling tool or |
|
|
some other interesting stuff like the "Co-operative UML Editor" from Uni Darmstadt. (web-/java-based) |
|
|
- Enable Round Trip Engineering. Keep code and diagrams in sync. Don't annoy/bother the programmers. |
|
|
- Add support for some more handlers/locators to be able to |
|
|
access the following standards/protocols/interfaces/programs/apis transparently: |
|
|
+ DBD::CSV (via Data::Storage::Handler::DBI) |
|
|
(-) Text::CSV, XML::CSV, XML::Excel |
|
|
- MAPI |
|
|
- LDAP |
|
|
- DAV (look at PerlDAV: http://www.webdav.org/perldav/) |
|
|
- Mbox (use formail for seperating/splitting entries/nodes) |
|
|
- Cyrus (cyrdeliver - what about cyrretrieve (export)???) |
|
|
- use File::DiffTree, use File::Compare |
|
|
- Hibernate |
|
|
- "Win32::UserAccountDb" |
|
|
- "*nix::UserAccountDb" |
|
|
- .wab - files (Windows Address Book) |
|
|
- .pst - files (Outlook Post Storage?) |
|
|
- XML (e.g. via XML::Simple?) |
|
|
- Move to t3, look at InCASE |
|
|
- some kind of security layer for methods/objects |
|
|
- acls (stored via tangram/ldap?) for functions, methods and objects (entity- & data!?) |
|
|
- where are the hooks needed then? |
|
|
- is Data::Storage & Co. okay, or do we have to touch the innards of DBI and/or Tangram? |
|
|
- an attempt to start could be: |
|
|
- 'sub getACLByObjectId($id, $context)' |
|
|
- 'sub getACLByMethodname($id, $context)' |
|
|
- 'sub getACLByName($id, $context)' |
|
|
( would require a kinda registry to look up these very names pointing to arbitrary locations (code, data, ...) ) |
|
|
|
|
|
|
|
|
|
|
|
=head3 LINKS / REFERENCES |
|
|
|
|
|
Specs: |
|
|
UML 1.3 Spec: http://cgi.omg.org/cgi-bin/doc?ad/99-06-08.pdf |
|
|
XMI 1.1 Spec: http://cgi.omg.org/cgi-bin/doc?ad/99-10-02.pdf |
|
|
XMI 2.0 Spec: http://cgi.omg.org/docs/ad/01-06-12.pdf |
|
|
ODMG: http://odmg.org/ |
|
|
OIFML: http://odmg.org/library/readingroom/oifml.pdf |
|
|
|
|
|
CASE Tools: |
|
|
Rational Rose (commercial): http://www.rational.com/products/rose/ |
|
|
Together (commercial): http://www.oi.com/products/controlcenter/index.jsp |
|
|
InCASE - Tangram-based Universal Object Editor |
|
|
Sybase PowerDesigner: http://www.sybase.com/powerdesigner |
|
|
|
|
|
UML Editors: |
|
|
Fujaba (free, university): http://www.fujaba.de/ |
|
|
ArgoUML (free): http://argouml.tigris.org/ |
|
|
Poseidon (commercial): http://www.gentleware.com/products/poseidonDE.php3 |
|
|
Co-operative UML Editor (research): http://www.darmstadt.gmd.de/concert/activities/internal/umledit.html |
|
|
Metamill (commercial): http://www.metamill.com/ |
|
|
Violet (university, research, education): http://www.horstmann.com/violet/ |
|
|
PyUt (free): http://pyut.sourceforge.net/ |
|
|
(Dia (free): http://www.lysator.liu.se/~alla/dia/) |
|
|
UMLet (free, university): http://www.swt.tuwien.ac.at/umlet/index.html |
|
|
Voodoo (free): http://voodoo.sourceforge.net/ |
|
|
Umbrello UML Modeller: http://uml.sourceforge.net/ |
|
|
|
|
|
UML Tools: |
|
|
http://www.objectsbydesign.com/tools/umltools_byPrice.html |
|
|
|
|
|
Further readings: |
|
|
http://www.google.com/search?q=web+based+uml+editor&hl=en&lr=&ie=UTF-8&oe=UTF-8&start=10&sa=N |
|
|
http://www.fernuni-hagen.de/DVT/Aktuelles/01FHHeidelberg.pdf |
|
|
http://www.enhyper.com/src/documentation/ |
|
|
http://cis.cs.tu-berlin.de/Dokumente/Diplomarbeiten/2001/skinner.pdf |
|
|
http://citeseer.nj.nec.com/vilain00diagrammatic.html |
|
|
http://archive.devx.com/uml/articles/Smith01/Smith01-3.asp |
|
|
|
|