/[cvs]/nfo/perl/libs/Data/Storage/Handler/DBI.pm
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revision 1.3 by joko, Sun Nov 17 06:34:39 2002 UTC revision 1.15 by joko, Wed Apr 9 07:53:33 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.15  2003/04/09 07:53:33  joko
7    #  minor namespace update
8    #
9    #  Revision 1.14  2003/04/09 06:06:04  joko
10    #  sendQuery now is capable of doing 'SELECT'- or 'INSERT'-queries
11    #
12    #  Revision 1.13  2003/04/08 23:06:45  joko
13    #  renamed core database helper functions
14    #
15    #  Revision 1.12  2003/01/30 22:28:21  joko
16    #  + implemented new concrete methods
17    #
18    #  Revision 1.11  2002/12/19 16:31:05  joko
19    #  + sub dropDb
20    #  + sub rebuildDb
21    #
22    #  Revision 1.10  2002/12/15 02:02:22  joko
23    #  + fixed logging-message
24    #
25    #  Revision 1.9  2002/12/05 07:58:20  joko
26    #  + now using Tie::SecureHash as a base for the COREHANDLE
27    #  + former public COREHANDLE becomes private _COREHANDLE now
28    #
29    #  Revision 1.8  2002/12/01 22:20:43  joko
30    #  + sub createDb (from Storage.pm)
31    #
32    #  Revision 1.7  2002/12/01 07:09:09  joko
33    #  + sub getListFiltered (dummy redirecting to getListUnfiltered)
34    #
35    #  Revision 1.6  2002/12/01 04:46:01  joko
36    #  + sub eraseAll
37    #
38    #  Revision 1.5  2002/11/29 05:00:26  joko
39    #  + sub getListUnfiltered
40    #  + sub sendQuery
41    #
42    #  Revision 1.4  2002/11/17 08:46:42  jonen
43    #  + wrapped eval around DBI->connect to prevent deaths
44    #
45  #  Revision 1.3  2002/11/17 06:34:39  joko  #  Revision 1.3  2002/11/17 06:34:39  joko
46  #  + locator metadata can now be reached via ->{locator}  #  + locator metadata can now be reached via ->{locator}
47  #  - sub hash2sql now taken from libdb  #  - sub hash2sql now taken from libdb
# Line 24  use warnings; Line 63  use warnings;
63    
64  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
65    
66    
67  use DBI;  use DBI;
68  use Data::Dumper;  use Data::Dumper;
69  use libdb;  use shortcuts::database qw( hash2sql dsn2dbname );
70    use Data::Storage::Result::DBI;
71    
72    
73  # get logger instance  # get logger instance
74  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
75    
76    
77  our $metainfo = {  sub getMetaInfo {
78    'disconnectMethod' => 'disconnect',    my $self = shift;
79  };    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
80      return {
81        'disconnectMethod' => 'disconnect',
82      };
83    }
84    
85  sub connect {  sub connect {
86    
# Line 52  sub connect { Line 98  sub connect {
98                    
99          #use Data::Dumper; print Dumper($self->{dbi});          #use Data::Dumper; print Dumper($self->{dbi});
100                    
101          $self->{COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} );          eval {
102          if (!$self->{COREHANDLE}) {            $self->{_COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} );
103            $logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr );            if (!$self->{_COREHANDLE}) {
104            return;              $logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr );
105          }              return;
106              }
107            };
108            $logger->warning( __PACKAGE__ . "->connect failed: " . $@ ) if $@;
109    
110        }        }
111        $self->configureCOREHANDLE();        $self->configureCOREHANDLE();
112    
# Line 72  sub configureCOREHANDLE { Line 122  sub configureCOREHANDLE {
122    
123    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
124    
125    # apply configured modifications    return if !$self->{_COREHANDLE};
126    
127      # apply configured modifications to DBI-handle
128      if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) {      if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) {
129        $self->{COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file});        $self->{_COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file});
130      }      }
131      if (exists $self->{locator}->{dbi}->{RaiseError}) {      if (exists $self->{locator}->{dbi}->{RaiseError}) {
132        $self->{COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError};
133      }      }
134      if (exists $self->{locator}->{dbi}->{PrintError}) {      if (exists $self->{locator}->{dbi}->{PrintError}) {
135        $self->{COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError};        $self->{_COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError};
136      }      }
137      if (exists $self->{locator}->{dbi}->{HandleError}) {      if (exists $self->{locator}->{dbi}->{HandleError}) {
138        $self->{COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError};        $self->{_COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError};
139      }      }
140    
141  }  }
# Line 94  sub _sendSql { Line 146  sub _sendSql {
146        
147    # two-level handling for implicit connect:    # two-level handling for implicit connect:
148    # if there's no corehandle ...    # if there's no corehandle ...
149    if (!$self->{COREHANDLE}) {    if (!$self->{_COREHANDLE}) {
150      # ... try to connect, but ...      # ... try to connect, but ...
151      $self->connect();      $self->connect();
152      # ... if this still fails, there's something wrong probably, so we won't continue      # ... if this still fails, there's something wrong probably, so we won't continue
153      if (!$self->{COREHANDLE}) {      if (!$self->{_COREHANDLE}) {
154        return;        return;
155      }      }
156    }    }
157        
158    #print "prepare sql: $sql\n";    #print "prepare sql: $sql\n";
159        
160    my $sth = $self->{COREHANDLE}->prepare($sql);    my $sth = $self->{_COREHANDLE}->prepare($sql);
161    $sth->execute();    $sth->execute();
162    return $sth;    return $sth;
163  }  }
# Line 113  sub _sendSql { Line 165  sub _sendSql {
165  sub sendCommand {  sub sendCommand {
166    my $self = shift;    my $self = shift;
167    my $command = shift;    my $command = shift;
168      # TODO: when tracing: yes, do actually log this
169    #$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" );    #$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" );
170    my $cmdHandle = $self->_sendSql($command);    my $cmdHandle = $self->_sendSql($command);
171    my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle );
172    return $result;    return $result;
173  }  }
174    
175  sub quoteSql {  sub getChildNodes {
176      my $self = shift;
177      my @nodes;
178      $logger->debug( __PACKAGE__ . "->getChildNodes()" );
179      my $locator = $self->{locator};
180      #print Dumper($locator); exit;
181      if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
182        my $dbname = dsn2dbname($self->{locator}->{dbi}->{dsn});
183        my $key = "Tables_in_$dbname";
184        while ( my $row = $result->getNextEntry() ) {
185          push @nodes, $row->{$key};
186        }
187      }
188      return \@nodes;
189    }
190    
191    sub getListUnfiltered {
192    my $self = shift;    my $self = shift;
193    my $string = shift;    my $nodename = shift;
194    if ($string) {    my @list;
195      $string =~ s/'/\\'/g;    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
196      # get list of rows from rdbms by table name
197      my $result = $self->sendCommand("SELECT * FROM $nodename");
198      while ( my $row = $result->getNextEntry() ) {
199        push @list, $row;
200    }    }
201    return $string;    return \@list;
202  }  }
203    
204    sub sendQuery {
205      my $self = shift;
206      my $query = shift;
207    
208  sub getChildNodes {    $logger->debug( __PACKAGE__ . "->sendQuery" );
209    
210      my $action = $query->{options}->{action};
211      $action ||= 'load';
212    
213      if (my $guid = $query->{options}->{GUID}) {
214        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];
215      }
216    
217      # check criterias (load & save)
218      #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
219      #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
220      my @crits;
221      foreach (@{$query->{criterias}}) {
222        my $op = '';
223        $op = '=' if lc $_->{op} eq 'eq';
224        push @crits, "$_->{key}$op'$_->{val}'";
225      }
226      # HACK: this is hardcoded ;(    expand possibilities!
227      my $crit = join(' AND ', @crits);
228      
229      # check subnodes (load)
230      my $subnodes = {};
231      map { $subnodes->{$_}++ } @{$query->{subnodes}};
232      
233      # check payload (save)
234      #print Dumper($query->{payload});
235      #$subnodes ||= $query->{payload};
236      
237      # dispatch action
238      if ($action eq 'load') {
239        my $sql = hash2sql($query->{node}, $subnodes, 'SELECT', $crit);
240        return $self->sendCommand($sql);
241      } elsif ($action eq 'save') {
242        my $sql = hash2sql($query->{node}, $query->{payload}, 'UPDATE', $crit);
243        $self->sendCommand($sql);
244      }
245    
246    }
247    
248    sub eraseAll {
249    my $self = shift;    my $self = shift;
250    my @nodes;    my $classname = shift;
251      $logger->debug( __PACKAGE__ . "->eraseAll" );
252      my $sql = "DELETE FROM $classname";
253      $self->sendCommand($sql);
254    }
255    
256    $logger->debug( __PACKAGE__ . "->getChildNodes()" );  # TODO: actually implement the filtering functionality using $this->sendQuery
257    sub getListFiltered {
258      my $self = shift;
259      my $nodename = shift;
260      return $self->getListUnfiltered($nodename);
261    }
262    
263    if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {  # TODO: do this via a parametrized "$self->connect(<connect just to database server - don't select database>)"
264      my $dbname = getDbNameByDsn($self->{locator}->{dbi}->{dsn});  sub createDb {
265      my $key = "Tables_in_$dbname";    
266      while ( my $row = $result->_getNextEntry() ) {    my $self = shift;
267        push @nodes, $row->{$key};    
268      # get dsn from Data::Storage::Locator instance
269      my $dsn = $self->{locator}->{dbi}->{dsn};
270    
271      $logger->debug( __PACKAGE__ .  "->createDb( dsn $dsn )" );
272    
273      # remove database setting from dsn-string
274      $dsn =~ s/database=(.+?);//;
275      
276      # remember extracted database name to know what actually to create right now
277      my $database_name = $1;
278    
279      # flag to indicate goodness
280      my $ok;
281      
282      # connect to database server - don't select/use any specific database
283      #if ( my $dbh = DBI->connect($dsn, '', '', { PrintError => 0 } ) ) {
284      if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
285    
286        if ($database_name) {
287          if ($dbh->do("CREATE DATABASE $database_name")) {
288            $ok = 1;
289          }
290      }      }
291    
292        $dbh->disconnect();
293    
294    }    }
295        
296    return \@nodes;    return $ok;
297      
298    }
299    
300    sub getCOREHANDLE2 {
301      my $self = shift;
302      return $self->{_COREHANDLE};
303  }  }
304    
305    sub dropDb {
306      my $self = shift;
307      my $dsn = $self->{locator}->{dbi}->{dsn};
308    
309      $logger->debug( __PACKAGE__ .  "->dropDb( dsn $dsn )" );
310    
311      $dsn =~ s/database=(.+?);//;
312      my $database_name = $1;
313    
314  package Data::Storage::Result::DBI;    my $ok;
315      
316      if ( my $dbh = DBI->connect($dsn, '', '', {
317                                                          PrintError => 0,
318                                                          } ) ) {
319        if ($database_name) {
320          if ($dbh->do("DROP DATABASE $database_name;")) {
321            $ok = 1;
322          }
323        }
324    
325  use strict;      $dbh->disconnect();
 use warnings;  
326    
327  use base ("Data::Storage::Result");    }
328      
329      return $ok;
330    }
331    
332  sub DESTROY {  sub rebuildDb {
333    my $self = shift;    my $self = shift;
334    #$logger->debug( __PACKAGE__ . "->" . "DESTROY" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
335    $self->{RESULTHANDLE} && $self->{RESULTHANDLE}->finish();    my @results;
336    
337      # sum up results (bool (0/1)) in array
338      #push @results, $self->retreatSchema();
339      push @results, $self->dropDb();
340      push @results, $self->createDb();
341      #push @results, $self->deploySchema();
342    
343      # scan array for "bad ones"
344      my $res = 1;
345      map {
346        $res = 0 if (!$_);
347      } @results;
348      
349      return $res;
350  }  }
351    
352  sub _getNextEntry {  sub testAvailability {
353    my $self = shift;    my $self = shift;
354    $self->{RESULTHANDLE} && return $self->{RESULTHANDLE}->fetchrow_hashref;    my $status = $self->testDsn();
355      $self->{locator}->{status}->{available} = $status;
356      return $status;
357  }  }
358    
359    sub testDsn {
360      my $self = shift;
361      my $dsn = $self->{locator}->{dbi}->{dsn};
362      my $result;
363      if ( my $dbh = DBI->connect($dsn, '', '', {
364                                                          PrintError => 0,
365                                                          } ) ) {
366        
367        # TODO: REVIEW
368        $dbh->disconnect();
369        
370        return 1;
371      } else {
372        $logger->warning( __PACKAGE__ .  "[$self->{locator}->{type}]" . "->testDsn(): " . "DBI-error: " . $DBI::errstr );
373      }
374    }
375    
 1;  
376    1;
377    __END__
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