Storage/Handler/DBI.pm

#################################
#
#  $Id: DBI.pm,v 1.3 2002/11/17 06:34:39 joko Exp $
#
#  $Log: DBI.pm,v $
#  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;

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


our $metainfo = {
  '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" );

  # apply configured modifications
    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 $command = shift;
  #$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" );
  my $cmdHandle = $self->_sendSql($command);
  my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle );
  return $result;
}

sub quoteSql {
  my $self = shift;
  my $string = shift;
  if ($string) {
    $string =~ s/'/\\'/g;
  }
  return $string;
}


sub getChildNodes {

  my $self = shift;
  my @nodes;

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

  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;

}


package Data::Storage::Result::DBI;

use strict;
use warnings;

use base ("Data::Storage::Result");

sub DESTROY {
  my $self = shift;
  #$logger->debug( __PACKAGE__ . "->" . "DESTROY" );
  $self->{RESULTHANDLE} && $self->{RESULTHANDLE}->finish();
}

sub _getNextEntry {
  my $self = shift;
  $self->{RESULTHANDLE} && return $self->{RESULTHANDLE}->fetchrow_hashref;
}


1;
1	cvsjoko	1.1	#################################
2			#
3	jonen	1.4	# $Id: DBI.pm,v 1.3 2002/11/17 06:34:39 joko Exp $
4	joko	1.2	#
5			# $Log: DBI.pm,v $
6	jonen	1.4	# Revision 1.3 2002/11/17 06:34:39 joko
7			# + locator metadata can now be reached via ->{locator}
8			# - sub hash2sql now taken from libdb
9			#
10	joko	1.3	# Revision 1.2 2002/10/25 11:43:27 joko
11			# + enhanced robustness
12			# + more logging for debug-levels
13			#
14	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
15			# + new
16	cvsjoko	1.1	#
17			#
18			#################################
19
20			package Data::Storage::Handler::DBI;
21
22			use strict;
23			use warnings;
24
25			use base ("Data::Storage::Handler::Abstract");
26
27			use DBI;
28	joko	1.3	use Data::Dumper;
29			use libdb;
30	cvsjoko	1.1
31			# get logger instance
32			my $logger = Log::Dispatch::Config->instance;
33
34
35			our $metainfo = {
36			'disconnectMethod' => 'disconnect',
37			};
38
39			sub connect {
40
41			my $self = shift;
42
43			# create handle
44	joko	1.3	if ( my $dsn = $self->{locator}->{dbi}->{dsn} ) {
45			#if ( my $dsn = $self->{locator}->{dsn} ) {
46	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
47
48			# HACK:
49			# set errorhandler before actually calling DBI->connect
50			# in order to catch errors from the very beginning
51			#DBI->{HandleError} = $self->{dbi}->{HandleError};
52
53			#use Data::Dumper; print Dumper($self->{dbi});
54
55	jonen	1.4	eval {
56			$self->{COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} );
57			if (!$self->{COREHANDLE}) {
58			$logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr );
59			return;
60			}
61			};
62			$logger->warning( __PACKAGE__ . "->connect failed: " . $@ ) if $@;
63
64	cvsjoko	1.1	}
65			$self->configureCOREHANDLE();
66	joko	1.3
67			$self->{locator}->{status}->{connected} = 1;
68
69	joko	1.2	return 1;
70
71	cvsjoko	1.1	}
72
73			sub configureCOREHANDLE {
74
75			my $self = shift;
76
77	joko	1.3	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
78	cvsjoko	1.1
79			# apply configured modifications
80	joko	1.3	if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) {
81			$self->{COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file});
82	cvsjoko	1.1	}
83	joko	1.3	if (exists $self->{locator}->{dbi}->{RaiseError}) {
84			$self->{COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError};
85	cvsjoko	1.1	}
86	joko	1.3	if (exists $self->{locator}->{dbi}->{PrintError}) {
87			$self->{COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError};
88	cvsjoko	1.1	}
89	joko	1.3	if (exists $self->{locator}->{dbi}->{HandleError}) {
90			$self->{COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError};
91	cvsjoko	1.1	}
92
93			}
94
95			sub _sendSql {
96			my $self = shift;
97			my $sql = shift;
98	joko	1.2
99			# two-level handling for implicit connect:
100			# if there's no corehandle ...
101			if (!$self->{COREHANDLE}) {
102			# ... try to connect, but ...
103			$self->connect();
104			# ... if this still fails, there's something wrong probably, so we won't continue
105			if (!$self->{COREHANDLE}) {
106			return;
107			}
108			}
109
110	joko	1.3	#print "prepare sql: $sql\n";
111
112	cvsjoko	1.1	my $sth = $self->{COREHANDLE}->prepare($sql);
113			$sth->execute();
114			return $sth;
115			}
116
117			sub sendCommand {
118			my $self = shift;
119			my $command = shift;
120	joko	1.2	#$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" );
121	cvsjoko	1.1	my $cmdHandle = $self->_sendSql($command);
122			my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle );
123			return $result;
124			}
125
126			sub quoteSql {
127			my $self = shift;
128			my $string = shift;
129			if ($string) {
130			$string =~ s/'/\\'/g;
131			}
132			return $string;
133			}
134
135
136			sub getChildNodes {
137
138			my $self = shift;
139			my @nodes;
140
141	joko	1.3	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
142
143	cvsjoko	1.1	if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
144	joko	1.3	my $dbname = getDbNameByDsn($self->{locator}->{dbi}->{dsn});
145			my $key = "Tables_in_$dbname";
146	cvsjoko	1.1	while ( my $row = $result->_getNextEntry() ) {
147	joko	1.3	push @nodes, $row->{$key};
148	cvsjoko	1.1	}
149			}
150
151			return \@nodes;
152
153			}
154
155
156
157
158			package Data::Storage::Result::DBI;
159
160			use strict;
161			use warnings;
162
163			use base ("Data::Storage::Result");
164
165			sub DESTROY {
166			my $self = shift;
167			#$logger->debug( __PACKAGE__ . "->" . "DESTROY" );
168	joko	1.2	$self->{RESULTHANDLE} && $self->{RESULTHANDLE}->finish();
169	cvsjoko	1.1	}
170
171			sub _getNextEntry {
172			my $self = shift;
173	joko	1.2	$self->{RESULTHANDLE} && return $self->{RESULTHANDLE}->fetchrow_hashref;
174	cvsjoko	1.1	}
175
176
177	jonen	1.4	1;
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