Storage/Handler/DBI.pm

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