libs/Data/Storage.pm

#################################
#
#  $Id: Storage.pm,v 1.1 2002/10/10 03:43:12 cvsjoko Exp $
#
#  $Log: Storage.pm,v $
#  Revision 1.1  2002/10/10 03:43:12  cvsjoko
#  + new
#
#
#################################

package Data::Storage;

use strict;
use warnings;

use Data::Storage::Locator;

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

sub new {
  my $invocant = shift;
  my $class = ref($invocant) || $invocant;
  #my @args = normalizeArgs(@_);
  
  my $arg_locator = shift;
  my $arg_options = shift;
  
  #my $self = { STORAGEHANDLE => undef, @_ };
  my $self = { STORAGEHANDLE => undef, locator => $arg_locator, options => $arg_options };
  $logger->debug( __PACKAGE__ . "[$self->{locator}->{type}]" . "->new(@_)" );
  return bless $self, $class;
}

sub AUTOLOAD {
  
  # since this is a core function acting as dispatcher to $self->{STORAGEHANDLE},
  # some sophisticated handling and filtering is needed to avoid things like
  #     - Deep recursion on subroutine "Data::Storage::AUTOLOAD"
  #     - Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD"
  #     - Deep recursion on anonymous subroutine at [...]
  # we also might filter log messages caused by logging itself in "advanced logging of AUTOLOAD calls"
  
  my $self = shift;
  our $AUTOLOAD;
  
  # ->DESTROY would - if not declared - trigger an AUTOLOAD also
  return if $AUTOLOAD =~ m/::DESTROY$/;

  my $method = $AUTOLOAD;
  $method =~ s/^.*:://;

  # advanced logging of AUTOLOAD calls
    my $logstring = __PACKAGE__ . "[$self->{locator}->{type}]" . "->" . $method . "(@_)";
    my $tabcount = int( (80 - length($logstring)) / 10 );
    $logstring .= "\t" x $tabcount . "(AUTOLOAD)";
    # TODO: only ok if logstring doesn't contain 
    #            e.g. "Data::Storage[Tangram]->insert(SystemEvent=HASH(0x5c0034c))          (AUTOLOAD)"
    # but that would be way too specific as long as we don't have an abstract handler for this  ;)
    $logger->debug( $logstring );

  # filtering AUTOLOAD calls
  if ($self->_filter_AUTOLOAD($method)) {
    $self->_accessStorage();
    $self->{STORAGEHANDLE}->$method(@_);
  }
  
}

sub _filter_AUTOLOAD {
  my $self = shift;
  my $method = shift;
  if ($self->{options}->{protected}) {
    if ($method eq 'disconnect') {
      return;
    }
  }
  return 1;
}


sub normalizeArgs {
  my %args = @_;
  if (!$args{dsn} && $args{meta}{dsn}) {
    $args{dsn} = $args{meta}{dsn};
  }
  my @result = %args;
  return @result;
}

sub _accessStorage {
  my $self = shift;
  # TODO: to some tracelevel!
  #$logger->debug( __PACKAGE__ .  "[$self->{type}]" . "->_accessStorage()" );
  if (!$self->{STORAGEHANDLE}) {
    $self->_createStorageHandle();
  }
}

sub _createStorageHandle {
  my $self = shift;

  my $type = $self->{locator}->{type};
  $logger->debug( __PACKAGE__ .  "[$type]" . "->_createStorageHandle()" );

  my $pkg = "Data::Storage::Handler::" . $type . "";
  
  # propagate args to handler
  # needs some more thoughts! (not only "dbi" to Tangram, when (in future) db is not more the common case)
  if ($type eq 'DBI') {
    use Data::Storage::Handler::DBI;
    #my @args = %{$self->{locator}->{dbi}};
    my @args = %{$self->{locator}};
    $self->{STORAGEHANDLE} = $pkg->new( @args );
  }
  if ($type eq 'Tangram') {
    use Data::Storage::Handler::Tangram;
    #$self->{STORAGEHANDLE} = $pkg->new( dsn => $self->{locator}->{dbi}->{dsn} );
    #my @args = %{$self->{locator}->{dbi}};
    my @args = %{$self->{locator}};
    $self->{STORAGEHANDLE} = $pkg->new( @args );
    #$self->{STORAGEHANDLE_UNDERLYING} = $self->{STORAGEHANDLE}->getUnderlyingStorage();
    #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
  }
  
}

sub addLogDispatchHandler {

      my $self = shift;
      my $name = shift;
      my $package = shift;
      my $logger = shift;
      my $objectCreator = shift;
      
      #$logger->add( Log::Dispatch::Tangram->new( name => $name,
      $logger->add( $package->new( name => $name,
                                            #min_level => 'debug',
                                            min_level => 'info',
                                            storage => $self,
                                            objectCreator => $objectCreator,
                                            fields => {
                                              message => 'usermsg',
                                              timestamp => 'stamp',
                                              level => 'level',
                                              name => 'code',
                                            },
                                            filter_patterns => [ '->insert\(SystemEvent=' ],
                                            #filter_patterns => [ 'SystemEvent' ],
                                            
                                            #format  => '[%d] [%p] %m%n',
                                             ) );

}

sub removeLogDispatchHandler {

      my $self = shift;
      my $name = shift;
      my $logger = shift;

      $logger->remove($name);

}

sub getDbName {
  my $self = shift;
  my $dsn = $self->{locator}->{dbi}->{dsn};
  $dsn =~ m/database=(.+?);/;
  my $database_name = $1;
  return $database_name;
}

sub testDsn {
  my $self = shift;
  my $dsn = $self->{locator}->{dbi}->{dsn};
  my $result;
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                      } ) ) {
    $dbh->disconnect();
    return 1;
  } else {
    $logger->error( __PACKAGE__ .  "[$self->{locator}->{type}]" . "->testDsn(): " . "DBI-error: " . $DBI::errstr );
  }
}

sub createDb {
  my $self = shift;
  my $dsn = $self->{locator}->{dbi}->{dsn};
  $dsn =~ s/database=(.+?);//;
  my $database_name = $1;

  my $ok;
  
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                      } ) ) {
    if ($database_name) {
      if ($dbh->do("CREATE DATABASE $database_name;")) {
        $ok = 1;
      }
    }
    $dbh->disconnect();
  }
  
  return $ok;
  
}

sub isConnected {
  my $self = shift;
  return 1 if $self->{STORAGEHANDLE};
}

1;
1	#################################
2	#
3	# $Id: Storage.pm,v 1.1 2002/10/10 03:43:12 cvsjoko Exp $
4	#
5	# $Log: Storage.pm,v $
6	# Revision 1.1 2002/10/10 03:43:12 cvsjoko
7	# + new
8	#
9	#
10	#################################
11
12	package Data::Storage;
13
14	use strict;
15	use warnings;
16
17	use Data::Storage::Locator;
18
19	# get logger instance
20	my $logger = Log::Dispatch::Config->instance;
21
22	sub new {
23	my $invocant = shift;
24	my $class = ref($invocant) \|\| $invocant;
25	#my @args = normalizeArgs(@_);
26
27	my $arg_locator = shift;
28	my $arg_options = shift;
29
30	#my $self = { STORAGEHANDLE => undef, @_ };
31	my $self = { STORAGEHANDLE => undef, locator => $arg_locator, options => $arg_options };
32	$logger->debug( __PACKAGE__ . "[$self->{locator}->{type}]" . "->new(@_)" );
33	return bless $self, $class;
34	}
35
36	sub AUTOLOAD {
37
38	# since this is a core function acting as dispatcher to $self->{STORAGEHANDLE},
39	# some sophisticated handling and filtering is needed to avoid things like
40	# - Deep recursion on subroutine "Data::Storage::AUTOLOAD"
41	# - Deep recursion on subroutine "Data::Storage::Handler::Abstract::AUTOLOAD"
42	# - Deep recursion on anonymous subroutine at [...]
43	# we also might filter log messages caused by logging itself in "advanced logging of AUTOLOAD calls"
44
45	my $self = shift;
46	our $AUTOLOAD;
47
48	# ->DESTROY would - if not declared - trigger an AUTOLOAD also
49	return if $AUTOLOAD =~ m/::DESTROY$/;
50
51	my $method = $AUTOLOAD;
52	$method =~ s/^.*:://;
53
54	# advanced logging of AUTOLOAD calls
55	my $logstring = __PACKAGE__ . "[$self->{locator}->{type}]" . "->" . $method . "(@_)";
56	my $tabcount = int( (80 - length($logstring)) / 10 );
57	$logstring .= "\t" x $tabcount . "(AUTOLOAD)";
58	# TODO: only ok if logstring doesn't contain
59	# e.g. "Data::Storage[Tangram]->insert(SystemEvent=HASH(0x5c0034c)) (AUTOLOAD)"
60	# but that would be way too specific as long as we don't have an abstract handler for this ;)
61	$logger->debug( $logstring );
62
63	# filtering AUTOLOAD calls
64	if ($self->_filter_AUTOLOAD($method)) {
65	$self->_accessStorage();
66	$self->{STORAGEHANDLE}->$method(@_);
67	}
68
69	}
70
71	sub _filter_AUTOLOAD {
72	my $self = shift;
73	my $method = shift;
74	if ($self->{options}->{protected}) {
75	if ($method eq 'disconnect') {
76	return;
77	}
78	}
79	return 1;
80	}
81
82
83	sub normalizeArgs {
84	my %args = @_;
85	if (!$args{dsn} && $args{meta}{dsn}) {
86	$args{dsn} = $args{meta}{dsn};
87	}
88	my @result = %args;
89	return @result;
90	}
91
92	sub _accessStorage {
93	my $self = shift;
94	# TODO: to some tracelevel!
95	#$logger->debug( __PACKAGE__ . "[$self->{type}]" . "->_accessStorage()" );
96	if (!$self->{STORAGEHANDLE}) {
97	$self->_createStorageHandle();
98	}
99	}
100
101	sub _createStorageHandle {
102	my $self = shift;
103
104	my $type = $self->{locator}->{type};
105	$logger->debug( __PACKAGE__ . "[$type]" . "->_createStorageHandle()" );
106
107	my $pkg = "Data::Storage::Handler::" . $type . "";
108
109	# propagate args to handler
110	# needs some more thoughts! (not only "dbi" to Tangram, when (in future) db is not more the common case)
111	if ($type eq 'DBI') {
112	use Data::Storage::Handler::DBI;
113	#my @args = %{$self->{locator}->{dbi}};
114	my @args = %{$self->{locator}};
115	$self->{STORAGEHANDLE} = $pkg->new( @args );
116	}
117	if ($type eq 'Tangram') {
118	use Data::Storage::Handler::Tangram;
119	#$self->{STORAGEHANDLE} = $pkg->new( dsn => $self->{locator}->{dbi}->{dsn} );
120	#my @args = %{$self->{locator}->{dbi}};
121	my @args = %{$self->{locator}};
122	$self->{STORAGEHANDLE} = $pkg->new( @args );
123	#$self->{STORAGEHANDLE_UNDERLYING} = $self->{STORAGEHANDLE}->getUnderlyingStorage();
124	#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
125	}
126
127	}
128
129	sub addLogDispatchHandler {
130
131	my $self = shift;
132	my $name = shift;
133	my $package = shift;
134	my $logger = shift;
135	my $objectCreator = shift;
136
137	#$logger->add( Log::Dispatch::Tangram->new( name => $name,
138	$logger->add( $package->new( name => $name,
139	#min_level => 'debug',
140	min_level => 'info',
141	storage => $self,
142	objectCreator => $objectCreator,
143	fields => {
144	message => 'usermsg',
145	timestamp => 'stamp',
146	level => 'level',
147	name => 'code',
148	},
149	filter_patterns => [ '->insert\(SystemEvent=' ],
150	#filter_patterns => [ 'SystemEvent' ],
151
152	#format => '[%d] [%p] %m%n',
153	) );
154
155	}
156
157	sub removeLogDispatchHandler {
158
159	my $self = shift;
160	my $name = shift;
161	my $logger = shift;
162
163	$logger->remove($name);
164
165	}
166
167	sub getDbName {
168	my $self = shift;
169	my $dsn = $self->{locator}->{dbi}->{dsn};
170	$dsn =~ m/database=(.+?);/;
171	my $database_name = $1;
172	return $database_name;
173	}
174
175	sub testDsn {
176	my $self = shift;
177	my $dsn = $self->{locator}->{dbi}->{dsn};
178	my $result;
179	if ( my $dbh = DBI->connect($dsn, '', '', {
180	PrintError => 0,
181	} ) ) {
182	$dbh->disconnect();
183	return 1;
184	} else {
185	$logger->error( __PACKAGE__ . "[$self->{locator}->{type}]" . "->testDsn(): " . "DBI-error: " . $DBI::errstr );
186	}
187	}
188
189	sub createDb {
190	my $self = shift;
191	my $dsn = $self->{locator}->{dbi}->{dsn};
192	$dsn =~ s/database=(.+?);//;
193	my $database_name = $1;
194
195	my $ok;
196
197	if ( my $dbh = DBI->connect($dsn, '', '', {
198	PrintError => 0,
199	} ) ) {
200	if ($database_name) {
201	if ($dbh->do("CREATE DATABASE $database_name;")) {
202	$ok = 1;
203	}
204	}
205	$dbh->disconnect();
206	}
207
208	return $ok;
209
210	}
211
212	sub isConnected {
213	my $self = shift;
214	return 1 if $self->{STORAGEHANDLE};
215	}
216
217	1;
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