Storage/Handler/DBI.pm

#################################
#
#  $Id: DBI.pm,v 1.10 2002/12/15 02:02:22 joko Exp $
#
#  $Log: DBI.pm,v $
#  Revision 1.10  2002/12/15 02:02:22  joko
#  + fixed logging-message
#
#  Revision 1.9  2002/12/05 07:58:20  joko
#  + now using Tie::SecureHash as a base for the COREHANDLE
#  + former public COREHANDLE becomes private _COREHANDLE now
#
#  Revision 1.8  2002/12/01 22:20:43  joko
#  + sub createDb (from Storage.pm)
#
#  Revision 1.7  2002/12/01 07:09:09  joko
#  + sub getListFiltered (dummy redirecting to getListUnfiltered)
#
#  Revision 1.6  2002/12/01 04:46:01  joko
#  + sub eraseAll
#
#  Revision 1.5  2002/11/29 05:00:26  joko
#  + sub getListUnfiltered
#  + sub sendQuery
#
#  Revision 1.4  2002/11/17 08:46:42  jonen
#  + wrapped eval around DBI->connect to prevent deaths
#
#  Revision 1.3  2002/11/17 06:34:39  joko
#  + locator metadata can now be reached via ->{locator}
#  - sub hash2sql now taken from libdb
#
#  Revision 1.2  2002/10/25 11:43:27  joko
#  + enhanced robustness
#  + more logging for debug-levels
#
#  Revision 1.1  2002/10/10 03:44:07  cvsjoko
#  + new
#
#
#################################

package Data::Storage::Handler::DBI;

use strict;
use warnings;

use base ("Data::Storage::Handler::Abstract");

use DBI;
use Data::Dumper;
use libdb qw( getDbNameByDsn hash2Sql );
use Data::Storage::Result::DBI;

# get logger instance
my $logger = Log::Dispatch::Config->instance;


sub getMetaInfo {
  my $self = shift;
  $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
  return {
    'disconnectMethod' => 'disconnect',
  };
}

sub connect {

    my $self = shift;
    
    # create handle
      if ( my $dsn = $self->{locator}->{dbi}->{dsn} ) {
      #if ( my $dsn = $self->{locator}->{dsn} ) {
        $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
        
        # HACK:
        # set errorhandler before actually calling DBI->connect 
        # in order to catch errors from the very beginning
        #DBI->{HandleError} = $self->{dbi}->{HandleError};
        
        #use Data::Dumper; print Dumper($self->{dbi});
        
        eval {
          $self->{_COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} );
          if (!$self->{_COREHANDLE}) {
            $logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr );
            return;
          }
        };
        $logger->warning( __PACKAGE__ . "->connect failed: " . $@ ) if $@;

      }
      $self->configureCOREHANDLE();

    $self->{locator}->{status}->{connected} = 1;

    return 1;
    
}

sub configureCOREHANDLE {

  my $self = shift;

  $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );

  return if !$self->{_COREHANDLE};

  # apply configured modifications to DBI-handle
    if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) {
      $self->{_COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file});
    }
    if (exists $self->{locator}->{dbi}->{RaiseError}) {
      $self->{_COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError};
    }
    if (exists $self->{locator}->{dbi}->{PrintError}) {
      $self->{_COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError};
    }
    if (exists $self->{locator}->{dbi}->{HandleError}) {
      $self->{_COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError};
    }

}

sub _sendSql {
  my $self = shift;
  my $sql = shift;
  
  # two-level handling for implicit connect:
  # if there's no corehandle ...
  if (!$self->{_COREHANDLE}) {
    # ... try to connect, but ...
    $self->connect();
    # ... if this still fails, there's something wrong probably, so we won't continue
    if (!$self->{_COREHANDLE}) {
      return;
    }
  }
  
  #print "prepare sql: $sql\n";
  
  my $sth = $self->{_COREHANDLE}->prepare($sql);
  $sth->execute();
  return $sth;
}

sub sendCommand {
  my $self = shift;
  my $command = shift;
  # TODO: when tracing: yes, do actually log this
  #$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" );
  my $cmdHandle = $self->_sendSql($command);
  my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle );
  return $result;
}

sub getChildNodes {
  my $self = shift;
  my @nodes;
  $logger->debug( __PACKAGE__ . "->getChildNodes()" );
  my $locator = $self->{locator};
  #print Dumper($locator); exit;
  if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
    my $dbname = getDbNameByDsn($self->{locator}->{dbi}->{dsn});
    my $key = "Tables_in_$dbname";
    while ( my $row = $result->getNextEntry() ) {
      push @nodes, $row->{$key};
    }
  }
  return \@nodes;
}

sub getListUnfiltered {
  my $self = shift;
  my $nodename = shift;
  my @list;
  $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
  # get list of rows from rdbms by table name
  my $result = $self->sendCommand("SELECT * FROM $nodename");
  while ( my $row = $result->getNextEntry() ) {
    push @list, $row;
  }
  return \@list;
}

sub sendQuery {
  my $self = shift;
  my $query = shift;

  $logger->debug( __PACKAGE__ . "->sendQuery" );

  #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
  #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
  my @crits;
  foreach (@{$query->{criterias}}) {
    my $op = '';
    $op = '=' if lc $_->{op} eq 'eq';
    push @crits, "$_->{key}$op'$_->{val}'";
  }
  my $subnodes = {};
  map { $subnodes->{$_}++ } @{$query->{subnodes}};
  # HACK: this is hardcoded ;(    expand possibilities!
  my $crit = join(' AND ', @crits);
  my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
  return $self->sendCommand($sql);
}

sub eraseAll {
  my $self = shift;
  my $classname = shift;
  $logger->debug( __PACKAGE__ . "->eraseAll" );
  my $sql = "DELETE FROM $classname";
  $self->sendCommand($sql);
}

# TODO: actually implement the filtering functionality using $this->sendQuery
sub getListFiltered {
  my $self = shift;
  my $nodename = shift;
  return $self->getListUnfiltered($nodename);
}

# TODO: do this via a parametrized "$self->connect(<connect just to database server - don't select database>)"
sub createDb {
  
  my $self = shift;
  
  # get dsn from Data::Storage::Locator instance
  my $dsn = $self->{locator}->{dbi}->{dsn};

  $logger->debug( __PACKAGE__ .  "->createDb( dsn $dsn )" );

  # remove database setting from dsn-string
  $dsn =~ s/database=(.+?);//;
  
  # remember extracted database name to know what actually to create right now
  my $database_name = $1;

  # flag to indicate goodness
  my $ok;
  
  # connect to database server - don't select/use any specific database
  #if ( my $dbh = DBI->connect($dsn, '', '', { PrintError => 0 } ) ) {
  if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {

    if ($database_name) {
      if ($dbh->do("CREATE DATABASE $database_name")) {
        $ok = 1;
      }
    }

    $dbh->disconnect();

  }
  
  return $ok;
  
}

sub getCOREHANDLE2 {
  my $self = shift;
  return $self->{_COREHANDLE};
}

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 rebuildDb {
  my $self = shift;
  $logger->info( __PACKAGE__ . "->rebuildDb()" );
  my @results;

  # sum up results (bool (0/1)) in array
  #push @results, $self->retreatSchema();
  push @results, $self->dropDb();
  push @results, $self->createDb();
  #push @results, $self->deploySchema();

  # scan array for "bad ones"
  my $res = 1;
  map {
    $res = 0 if (!$_);
  } @results;
  
  return $res;
}

1;
1	#################################
2	#
3	# $Id: DBI.pm,v 1.10 2002/12/15 02:02:22 joko Exp $
4	#
5	# $Log: DBI.pm,v $
6	# Revision 1.10 2002/12/15 02:02:22 joko
7	# + fixed logging-message
8	#
9	# Revision 1.9 2002/12/05 07:58:20 joko
10	# + now using Tie::SecureHash as a base for the COREHANDLE
11	# + former public COREHANDLE becomes private _COREHANDLE now
12	#
13	# Revision 1.8 2002/12/01 22:20:43 joko
14	# + sub createDb (from Storage.pm)
15	#
16	# Revision 1.7 2002/12/01 07:09:09 joko
17	# + sub getListFiltered (dummy redirecting to getListUnfiltered)
18	#
19	# Revision 1.6 2002/12/01 04:46:01 joko
20	# + sub eraseAll
21	#
22	# Revision 1.5 2002/11/29 05:00:26 joko
23	# + sub getListUnfiltered
24	# + sub sendQuery
25	#
26	# Revision 1.4 2002/11/17 08:46:42 jonen
27	# + wrapped eval around DBI->connect to prevent deaths
28	#
29	# Revision 1.3 2002/11/17 06:34:39 joko
30	# + locator metadata can now be reached via ->{locator}
31	# - sub hash2sql now taken from libdb
32	#
33	# Revision 1.2 2002/10/25 11:43:27 joko
34	# + enhanced robustness
35	# + more logging for debug-levels
36	#
37	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
38	# + new
39	#
40	#
41	#################################
42
43	package Data::Storage::Handler::DBI;
44
45	use strict;
46	use warnings;
47
48	use base ("Data::Storage::Handler::Abstract");
49
50	use DBI;
51	use Data::Dumper;
52	use libdb qw( getDbNameByDsn hash2Sql );
53	use Data::Storage::Result::DBI;
54
55	# get logger instance
56	my $logger = Log::Dispatch::Config->instance;
57
58
59	sub getMetaInfo {
60	my $self = shift;
61	$logger->debug( __PACKAGE__ . "->getMetaInfo()" );
62	return {
63	'disconnectMethod' => 'disconnect',
64	};
65	}
66
67	sub connect {
68
69	my $self = shift;
70
71	# create handle
72	if ( my $dsn = $self->{locator}->{dbi}->{dsn} ) {
73	#if ( my $dsn = $self->{locator}->{dsn} ) {
74	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
75
76	# HACK:
77	# set errorhandler before actually calling DBI->connect
78	# in order to catch errors from the very beginning
79	#DBI->{HandleError} = $self->{dbi}->{HandleError};
80
81	#use Data::Dumper; print Dumper($self->{dbi});
82
83	eval {
84	$self->{_COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} );
85	if (!$self->{_COREHANDLE}) {
86	$logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr );
87	return;
88	}
89	};
90	$logger->warning( __PACKAGE__ . "->connect failed: " . $@ ) if $@;
91
92	}
93	$self->configureCOREHANDLE();
94
95	$self->{locator}->{status}->{connected} = 1;
96
97	return 1;
98
99	}
100
101	sub configureCOREHANDLE {
102
103	my $self = shift;
104
105	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
106
107	return if !$self->{_COREHANDLE};
108
109	# apply configured modifications to DBI-handle
110	if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) {
111	$self->{_COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file});
112	}
113	if (exists $self->{locator}->{dbi}->{RaiseError}) {
114	$self->{_COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError};
115	}
116	if (exists $self->{locator}->{dbi}->{PrintError}) {
117	$self->{_COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError};
118	}
119	if (exists $self->{locator}->{dbi}->{HandleError}) {
120	$self->{_COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError};
121	}
122
123	}
124
125	sub _sendSql {
126	my $self = shift;
127	my $sql = shift;
128
129	# two-level handling for implicit connect:
130	# if there's no corehandle ...
131	if (!$self->{_COREHANDLE}) {
132	# ... try to connect, but ...
133	$self->connect();
134	# ... if this still fails, there's something wrong probably, so we won't continue
135	if (!$self->{_COREHANDLE}) {
136	return;
137	}
138	}
139
140	#print "prepare sql: $sql\n";
141
142	my $sth = $self->{_COREHANDLE}->prepare($sql);
143	$sth->execute();
144	return $sth;
145	}
146
147	sub sendCommand {
148	my $self = shift;
149	my $command = shift;
150	# TODO: when tracing: yes, do actually log this
151	#$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" );
152	my $cmdHandle = $self->_sendSql($command);
153	my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle );
154	return $result;
155	}
156
157	sub getChildNodes {
158	my $self = shift;
159	my @nodes;
160	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
161	my $locator = $self->{locator};
162	#print Dumper($locator); exit;
163	if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
164	my $dbname = getDbNameByDsn($self->{locator}->{dbi}->{dsn});
165	my $key = "Tables_in_$dbname";
166	while ( my $row = $result->getNextEntry() ) {
167	push @nodes, $row->{$key};
168	}
169	}
170	return \@nodes;
171	}
172
173	sub getListUnfiltered {
174	my $self = shift;
175	my $nodename = shift;
176	my @list;
177	$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
178	# get list of rows from rdbms by table name
179	my $result = $self->sendCommand("SELECT * FROM $nodename");
180	while ( my $row = $result->getNextEntry() ) {
181	push @list, $row;
182	}
183	return \@list;
184	}
185
186	sub sendQuery {
187	my $self = shift;
188	my $query = shift;
189
190	$logger->debug( __PACKAGE__ . "->sendQuery" );
191
192	#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
193	#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
194	my @crits;
195	foreach (@{$query->{criterias}}) {
196	my $op = '';
197	$op = '=' if lc $_->{op} eq 'eq';
198	push @crits, "$_->{key}$op'$_->{val}'";
199	}
200	my $subnodes = {};
201	map { $subnodes->{$_}++ } @{$query->{subnodes}};
202	# HACK: this is hardcoded ;( expand possibilities!
203	my $crit = join(' AND ', @crits);
204	my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
205	return $self->sendCommand($sql);
206	}
207
208	sub eraseAll {
209	my $self = shift;
210	my $classname = shift;
211	$logger->debug( __PACKAGE__ . "->eraseAll" );
212	my $sql = "DELETE FROM $classname";
213	$self->sendCommand($sql);
214	}
215
216	# TODO: actually implement the filtering functionality using $this->sendQuery
217	sub getListFiltered {
218	my $self = shift;
219	my $nodename = shift;
220	return $self->getListUnfiltered($nodename);
221	}
222
223	# TODO: do this via a parametrized "$self->connect(<connect just to database server - don't select database>)"
224	sub createDb {
225
226	my $self = shift;
227
228	# get dsn from Data::Storage::Locator instance
229	my $dsn = $self->{locator}->{dbi}->{dsn};
230
231	$logger->debug( __PACKAGE__ . "->createDb( dsn $dsn )" );
232
233	# remove database setting from dsn-string
234	$dsn =~ s/database=(.+?);//;
235
236	# remember extracted database name to know what actually to create right now
237	my $database_name = $1;
238
239	# flag to indicate goodness
240	my $ok;
241
242	# connect to database server - don't select/use any specific database
243	#if ( my $dbh = DBI->connect($dsn, '', '', { PrintError => 0 } ) ) {
244	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
245
246	if ($database_name) {
247	if ($dbh->do("CREATE DATABASE $database_name")) {
248	$ok = 1;
249	}
250	}
251
252	$dbh->disconnect();
253
254	}
255
256	return $ok;
257
258	}
259
260	sub getCOREHANDLE2 {
261	my $self = shift;
262	return $self->{_COREHANDLE};
263	}
264
265	sub dropDb {
266	my $self = shift;
267	my $dsn = $self->{locator}->{dbi}->{dsn};
268
269	$logger->debug( __PACKAGE__ . "->dropDb( dsn $dsn )" );
270
271	$dsn =~ s/database=(.+?);//;
272	my $database_name = $1;
273
274	my $ok;
275
276	if ( my $dbh = DBI->connect($dsn, '', '', {
277	PrintError => 0,
278	} ) ) {
279	if ($database_name) {
280	if ($dbh->do("DROP DATABASE $database_name;")) {
281	$ok = 1;
282	}
283	}
284
285	$dbh->disconnect();
286
287	}
288
289	return $ok;
290	}
291
292	sub rebuildDb {
293	my $self = shift;
294	$logger->info( __PACKAGE__ . "->rebuildDb()" );
295	my @results;
296
297	# sum up results (bool (0/1)) in array
298	#push @results, $self->retreatSchema();
299	push @results, $self->dropDb();
300	push @results, $self->createDb();
301	#push @results, $self->deploySchema();
302
303	# scan array for "bad ones"
304	my $res = 1;
305	map {
306	$res = 0 if (!$_);
307	} @results;
308
309	return $res;
310	}
311
312	1;
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26