Data/Storage/Container.pm

################################################
#
#  $Id: Container.pm,v 1.1 2002/11/29 04:54:54 joko Exp $
#
#  $Log: Container.pm,v $
#  Revision 1.1  2002/11/29 04:54:54  joko
#  + initial check-in
#
#  Revision 1.1  2002/11/17 06:20:41  joko
#  + initial check in
#
#
################################################


package Data::Storage::Container;

use strict;
use warnings;

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

use libp qw( deep_copy );
use Data::Dumper;
use Data::Storage;
#use Data::Storage::Locator;

sub new {
  my $invocant = shift;
  my $class = ref($invocant) || $invocant;

  # get constructor arguments
  my @args = ();
  @_ && (@args = @_);
  $logger->debug( __PACKAGE__ . "->new( @args )" );

  my $self = { @_ };
  return bless $self, $class;
}

sub addConfig {
  my $self = shift;
  my $name = shift;
  my $config = shift;
  $self->{config}->{$name} = $config;
}

sub addConfigByDsn {
  my $self = shift;
  my $name = shift;
  my $dsn = shift;
  
  # HACK: assume DBI as default type for now
  # TODO: guess type from dsn
  my $type = "DBI";
  
  $self->addConfig($name, { type => $type, dsn => $dsn });
}

sub addStorage {
  my $self = shift;
  my $name = shift;
  my $storage = shift;
  $self->{storage}->{$name} = $storage;
}

sub initLocator {
  my $self = shift;
  my $name = shift;
  my $db_config = $self->{config}->{$name};

  $logger->debug( __PACKAGE__ . "->initLocator( db_config $db_config )" );

  my $cfg_locator = {};
  
  # set default settings, if any
  my $default = deep_copy($self->{config}->{_default});
  foreach (keys %$default) {
    $cfg_locator->{$_} = $default->{$_};
  }
  
  # name it
  $cfg_locator->{name} = $name;
  
  # merge in specific settings
  foreach (keys %$db_config) {
    $cfg_locator->{$_} = $db_config->{$_};
  }
  
  # HACK: transfer dsn from main to dbi settings
  $cfg_locator->{dbi}->{dsn} = $cfg_locator->{dsn} if $cfg_locator->{dsn};

  # HACK: set classnames empty if none given from config
  $cfg_locator->{classnames} = [] if !$cfg_locator->{classnames};

  # HACK: set errorhandler if dbi settings are present
  $cfg_locator->{dbi}->{HandleError} = \&_dbErrorHandler if $cfg_locator->{dbi};

  # create new locator object
  $self->{locator}->{$name} = Data::Storage::Locator->new( $cfg_locator );

}

sub initLocators {
  my $self = shift;
  foreach (keys %{$self->{config}}) {
    $self->initLocator($_, $self->{config}->{$_}) if !/^_/;
  }
  #print "locs: ", Dumper($self->{locator});
}

sub getLocator {
  my $self = shift;
  my $name = shift;
  return $self->{locator}->{$name};
}

sub initStorage {
  my $self = shift;
  my $name = shift;

  my $locator = $self->getLocator($name);
  $logger->info( __PACKAGE__ . " is booting storage declared by locator \"$name\"" );

  my $storage = Data::Storage->new($locator);

  my $log_prefix = __PACKAGE__ . "->initStorage: ";
  $log_prefix .= "dsn=\"$self->{locator}->{$name}->{dsn}\"" if $self->{locator}->{$name}->{dsn};

  # should we test availability of the storage before using it?
  if ($locator->{test_availability}) {
    if ( !$storage->testAvailability() ) {
      $logger->error( "$log_prefix is not available" );
      return;
    }
  }
          
  # should we test integrity of the storage before using it?
  if ($locator->{test_integrity}) {
    #return unless $storage->testIntegrity();
    $locator->{status}->{integrity} = $storage->testIntegrity();
    # actions if integrity fails
    if (!$locator->{status}->{integrity}) {
      $logger->error( "testIntegrity failed on $log_prefix" );
      print "Try a $locator->{name}.deploySchema()? (y/n) ";
      my $res = <STDIN>;
      if ($res =~ m/y/i) {
        $storage->deploySchema();
      }
    }
  }

  # try to connect...
  # TODO:
  # don't connect right here, do an implicit connect on (later) usage
  # maybe set ->{meta}->{connectmethod} = "connect" here
  #return unless $storage->connect();
  $storage->connect();

  # should we check emptyness?
  if ( $locator->{test_emptyness} && $locator->{status}->{integrity} ) {
    if ( !@{$storage->getChildNodes()} ) {
      $locator->{status}->{empty} = 1;
      $logger->warning( "$log_prefix is empty");
      #return;
    }
  }

  # expand logging?
  if ( $locator->{logger} && $locator->{status}->{integrity} ) {
    # expand logging (to Tangram-Database)
    # TODO:
    # - move configuration data from this code to db_config somehow
    # - do complete handling of this stuff in Data::Storage::* also
    # - just leave a simple on/off-trigger here and/or 
    # - make it optionally configurable via e.g. get/set-methods
    #    to satisfy "manual"-mode instead of "config"-mode
    # - (re-)add hierarchical logging (each event may have a parent)
    no strict;
    my $creator = sub { return new SystemEvent; };
    use strict;
    $storage->addLogDispatchHandler("Tangram11", "Log::Dispatch::Tangram", $logger, $creator);
    #$storage_left->addLogDispatchHandler("Tangram11", "Log::Dispatch::Tangram", $logger);
  }

  #$self->{storage}->{$name} = $storage;
  $self->addStorage($name, $storage);

  return 1;
  
}

sub initStorages {
  my $self = shift;
  foreach (keys %{$self->{locator}}) {
    $self->initStorage($_);
  }
}

sub _dbErrorHandler {
  my $message_db = shift;
  # get logger instance
  #my $logger = Log::Dispatch::Config->instance;
  #$logger->log(level => 'error', message => "Tangram DBI-Error: $message");
  my $message_log = "DBI-Error: $message_db";
  print STDERR $message_log, "\n";
  #$logger->error( $message_log );
  #$logger->log_to( name => 'file', level => 'error', message => $message_log);
  $logger->log_to( name => 'file', level => 'warning', message => $message_log);
  return 1;
}

1;
1	joko	1.1	################################################
2			#
3	joko	1.2	# $Id: Container.pm,v 1.1 2002/11/29 04:54:54 joko Exp $
4	joko	1.1	#
5			# $Log: Container.pm,v $
6	joko	1.2	# Revision 1.1 2002/11/29 04:54:54 joko
7			# + initial check-in
8			#
9	joko	1.1	# Revision 1.1 2002/11/17 06:20:41 joko
10			# + initial check in
11			#
12			#
13			################################################
14
15
16			package Data::Storage::Container;
17
18			use strict;
19			use warnings;
20
21			# get logger instance
22			my $logger = Log::Dispatch::Config->instance;
23
24			use libp qw( deep_copy );
25			use Data::Dumper;
26	joko	1.2	use Data::Storage;
27			#use Data::Storage::Locator;
28	joko	1.1
29			sub new {
30			my $invocant = shift;
31			my $class = ref($invocant) \|\| $invocant;
32
33			# get constructor arguments
34			my @args = ();
35			@_ && (@args = @_);
36			$logger->debug( __PACKAGE__ . "->new( @args )" );
37
38			my $self = { @_ };
39			return bless $self, $class;
40			}
41
42			sub addConfig {
43			my $self = shift;
44			my $name = shift;
45			my $config = shift;
46			$self->{config}->{$name} = $config;
47			}
48
49			sub addConfigByDsn {
50			my $self = shift;
51			my $name = shift;
52			my $dsn = shift;
53
54			# HACK: assume DBI as default type for now
55			# TODO: guess type from dsn
56			my $type = "DBI";
57
58			$self->addConfig($name, { type => $type, dsn => $dsn });
59			}
60
61			sub addStorage {
62			my $self = shift;
63			my $name = shift;
64			my $storage = shift;
65			$self->{storage}->{$name} = $storage;
66			}
67
68			sub initLocator {
69			my $self = shift;
70			my $name = shift;
71			my $db_config = $self->{config}->{$name};
72
73			$logger->debug( __PACKAGE__ . "->initLocator( db_config $db_config )" );
74
75			my $cfg_locator = {};
76
77			# set default settings, if any
78			my $default = deep_copy($self->{config}->{_default});
79			foreach (keys %$default) {
80			$cfg_locator->{$_} = $default->{$_};
81			}
82
83			# name it
84			$cfg_locator->{name} = $name;
85
86			# merge in specific settings
87			foreach (keys %$db_config) {
88			$cfg_locator->{$_} = $db_config->{$_};
89			}
90
91			# HACK: transfer dsn from main to dbi settings
92			$cfg_locator->{dbi}->{dsn} = $cfg_locator->{dsn} if $cfg_locator->{dsn};
93
94			# HACK: set classnames empty if none given from config
95			$cfg_locator->{classnames} = [] if !$cfg_locator->{classnames};
96
97			# HACK: set errorhandler if dbi settings are present
98			$cfg_locator->{dbi}->{HandleError} = \&_dbErrorHandler if $cfg_locator->{dbi};
99
100			# create new locator object
101			$self->{locator}->{$name} = Data::Storage::Locator->new( $cfg_locator );
102
103			}
104
105			sub initLocators {
106			my $self = shift;
107			foreach (keys %{$self->{config}}) {
108			$self->initLocator($_, $self->{config}->{$_}) if !/^_/;
109			}
110			#print "locs: ", Dumper($self->{locator});
111			}
112
113			sub getLocator {
114			my $self = shift;
115			my $name = shift;
116			return $self->{locator}->{$name};
117			}
118
119			sub initStorage {
120			my $self = shift;
121			my $name = shift;
122
123			my $locator = $self->getLocator($name);
124			$logger->info( __PACKAGE__ . " is booting storage declared by locator \"$name\"" );
125
126			my $storage = Data::Storage->new($locator);
127
128			my $log_prefix = __PACKAGE__ . "->initStorage: ";
129			$log_prefix .= "dsn=\"$self->{locator}->{$name}->{dsn}\"" if $self->{locator}->{$name}->{dsn};
130
131			# should we test availability of the storage before using it?
132			if ($locator->{test_availability}) {
133			if ( !$storage->testAvailability() ) {
134			$logger->error( "$log_prefix is not available" );
135			return;
136			}
137			}
138
139			# should we test integrity of the storage before using it?
140			if ($locator->{test_integrity}) {
141			#return unless $storage->testIntegrity();
142			$locator->{status}->{integrity} = $storage->testIntegrity();
143			# actions if integrity fails
144			if (!$locator->{status}->{integrity}) {
145			$logger->error( "testIntegrity failed on $log_prefix" );
146			print "Try a $locator->{name}.deploySchema()? (y/n) ";
147			my $res = <STDIN>;
148			if ($res =~ m/y/i) {
149			$storage->deploySchema();
150			}
151			}
152			}
153
154			# try to connect...
155			# TODO:
156			# don't connect right here, do an implicit connect on (later) usage
157			# maybe set ->{meta}->{connectmethod} = "connect" here
158			#return unless $storage->connect();
159			$storage->connect();
160
161			# should we check emptyness?
162			if ( $locator->{test_emptyness} && $locator->{status}->{integrity} ) {
163			if ( !@{$storage->getChildNodes()} ) {
164			$locator->{status}->{empty} = 1;
165			$logger->warning( "$log_prefix is empty");
166			#return;
167			}
168			}
169
170			# expand logging?
171			if ( $locator->{logger} && $locator->{status}->{integrity} ) {
172			# expand logging (to Tangram-Database)
173			# TODO:
174			# - move configuration data from this code to db_config somehow
175			# - do complete handling of this stuff in Data::Storage::* also
176			# - just leave a simple on/off-trigger here and/or
177			# - make it optionally configurable via e.g. get/set-methods
178			# to satisfy "manual"-mode instead of "config"-mode
179			# - (re-)add hierarchical logging (each event may have a parent)
180			no strict;
181			my $creator = sub { return new SystemEvent; };
182			use strict;
183			$storage->addLogDispatchHandler("Tangram11", "Log::Dispatch::Tangram", $logger, $creator);
184			#$storage_left->addLogDispatchHandler("Tangram11", "Log::Dispatch::Tangram", $logger);
185			}
186
187			#$self->{storage}->{$name} = $storage;
188			$self->addStorage($name, $storage);
189
190			return 1;
191
192			}
193
194			sub initStorages {
195			my $self = shift;
196			foreach (keys %{$self->{locator}}) {
197			$self->initStorage($_);
198			}
199			}
200
201			sub _dbErrorHandler {
202			my $message_db = shift;
203			# get logger instance
204			#my $logger = Log::Dispatch::Config->instance;
205			#$logger->log(level => 'error', message => "Tangram DBI-Error: $message");
206			my $message_log = "DBI-Error: $message_db";
207			print STDERR $message_log, "\n";
208			#$logger->error( $message_log );
209			#$logger->log_to( name => 'file', level => 'error', message => $message_log);
210			$logger->log_to( name => 'file', level => 'warning', message => $message_log);
211			return 1;
212			}
213
214			1;
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