Data/Storage/Container.pm

################################################
#
#  $Id: Container.pm,v 1.1 2002/11/17 06:20:41 joko Exp $
#
#  $Log: Container.pm,v $
#  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;


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