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## $Id: Sync.pm,v 1.8 2002/12/15 02:03:09 joko Exp $ |
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## |
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## Copyright (c) 2002 Andreas Motl <andreas.motl@ilo.de> |
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## |
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## See COPYRIGHT section in pod text below for usage and distribution rights. |
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## |
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## ---------------------------------------------------------------------------------------- |
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## $Log: Sync.pm,v $ |
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## Revision 1.8 2002/12/15 02:03:09 joko |
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## + fixed logging-messages |
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## + additional metadata-checks |
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## |
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## Revision 1.7 2002/12/13 21:49:34 joko |
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## + sub configure |
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## + sub checkOptions |
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## |
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## Revision 1.6 2002/12/06 04:49:10 jonen |
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## + disabled output-puffer here |
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## |
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## Revision 1.5 2002/12/05 08:06:05 joko |
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## + bugfix with determining empty fields (Null) with DBD::CSV |
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## + debugging |
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## + updated comments |
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## |
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## Revision 1.4 2002/12/03 15:54:07 joko |
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## + {import}-flag is now {prepare}-flag |
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## |
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## Revision 1.3 2002/12/01 22:26:59 joko |
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## + minor cosmetics for logging |
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## |
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## Revision 1.2 2002/12/01 04:43:25 joko |
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## + mapping deatil entries may now be either an ARRAY or a HASH |
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## + erase flag is used now (for export-operations) |
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## + expressions to refer to values inside deep nested structures |
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## - removed old mappingV2-code |
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## + cosmetics |
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## + sub _erase_all |
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## |
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## Revision 1.1 2002/11/29 04:45:50 joko |
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## + initial check in |
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## |
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## Revision 1.1 2002/10/10 03:44:21 cvsjoko |
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## + new |
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## ---------------------------------------------------------------------------------------- |
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|
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|
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package Data::Transfer::Sync; |
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|
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use strict; |
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use warnings; |
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|
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use Data::Dumper; |
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#use Hash::Merge qw( merge ); |
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|
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use misc::HashExt; |
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use libp qw( md5_base64 ); |
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use libdb qw( quotesql hash2Sql ); |
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use Data::Transform::Deep qw( hash2object refexpr2perlref ); |
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use Data::Compare::Struct qw( getDifference isEmpty ); |
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|
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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|
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$| = 1; |
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|
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sub new { |
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my $invocant = shift; |
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my $class = ref($invocant) || $invocant; |
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my $self = {}; |
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$logger->debug( __PACKAGE__ . "->new(@_)" ); |
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bless $self, $class; |
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$self->configure(@_); |
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return $self; |
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} |
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|
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|
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sub configure { |
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my $self = shift; |
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my @args = @_; |
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if (!isEmpty(\@args)) { |
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my %properties = @_; |
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# merge args to properties |
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map { $self->{$_} = $properties{$_}; } keys %properties; |
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$self->_init(); |
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} else { |
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#print "no args!", "\n"; |
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} |
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#print Dumper($self); |
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} |
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|
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sub _init { |
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my $self = shift; |
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|
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$self->{configured} = 1; |
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|
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# build new container if necessary |
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$self->{container} = Data::Storage::Container->new() if !$self->{container}; |
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|
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# add storages to container (optional) |
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foreach (keys %{$self->{storages}}) { |
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$self->{container}->addStorage($_, $self->{storages}->{$_}); |
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} |
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|
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# tag storages with id-authority and checksum-provider information |
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# TODO: better store tag inside metadata to hold bits together! |
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map { $self->{container}->{storage}->{$_}->{isIdentAuthority} = 1 } @{$self->{id_authorities}}; |
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map { $self->{container}->{storage}->{$_}->{isChecksumAuthority} = 1; } @{$self->{checksum_authorities}}; |
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map { $self->{container}->{storage}->{$_}->{isWriteProtected} = 1; } @{$self->{write_protected}}; |
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|
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} |
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|
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|
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sub prepareOptions { |
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|
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my $self = shift; |
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my $opts = shift; |
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|
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#print Dumper($opts); |
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|
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$opts->{mode} ||= ''; |
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$opts->{erase} ||= 0; |
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#$opts->{import} ||= 0; |
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|
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$logger->info( __PACKAGE__ . "->prepareOptions( source_node $opts->{source_node} mode $opts->{mode} erase $opts->{erase} prepare $opts->{prepare} )"); |
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|
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if (!$opts->{mapping} || !$opts->{mapping_module}) { |
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$logger->warning( __PACKAGE__ . "->prepareOptions: No mapping supplied - please check key 'mappings' in BizWorks/Config.pm"); |
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} |
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|
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my $evstring = "use $opts->{mapping_module};"; |
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eval($evstring); |
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if ($@) { |
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$logger->warning( __PACKAGE__ . "->prepareOptions: error while trying to access mapping - $@"); |
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return; |
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} |
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|
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# resolve mapping metadata (returned from sub) |
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my $mapObject = $opts->{mapping_module}->new(); |
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#print Dumper($map); |
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my $source_node_name = $opts->{source_node}; |
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# check if mapping for certain node is contained in mapping object |
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if (!$mapObject->can($source_node_name)) { |
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$logger->warning( __PACKAGE__ . "->prepareOptions: Can't access mapping for node \"$source_node_name\" - please check $opts->{mapping_module}."); |
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return; |
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} |
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my $map = $mapObject->$source_node_name; |
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|
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# remove asymmetries from $map (patch keys) |
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$map->{source_node} = $map->{source}; delete $map->{source}; |
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$map->{target_node} = $map->{target}; delete $map->{target}; |
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$map->{mapping} = $map->{details}; delete $map->{details}; |
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$map->{direction} = $map->{mode}; delete $map->{mode}; |
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|
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# defaults (mostly for backward-compatibility) |
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$map->{source_node} ||= $source_node_name; |
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$map->{source_ident} ||= 'storage_method:id'; |
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$map->{target_ident} ||= 'property:oid'; |
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$map->{direction} ||= $opts->{mode}; # | PUSH | PULL | FULL |
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$map->{method} ||= 'checksum'; # | timestamp |
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$map->{source_exclude} ||= [qw( cs )]; |
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|
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# merge map to opts |
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map { $opts->{$_} = $map->{$_}; } keys %$map; |
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|
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#print Dumper($opts); |
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|
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# TODO: move this to checkOptions... |
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|
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# check - do we have a target? |
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if (!$opts->{target_node}) { |
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$logger->warning( __PACKAGE__ . "->prepareOptions: No target given - please check metadata declaration."); |
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return; |
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} |
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|
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|
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#return $opts; |
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return 1; |
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|
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} |
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|
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|
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sub checkOptions { |
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my $self = shift; |
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my $opts = shift; |
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|
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my $result = 1; |
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|
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# check - do we have a target node? |
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if (!$opts->{target_node}) { |
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$logger->warning( __PACKAGE__ . "->checkOptions: Error while resolving resource metadata - no 'target node' could be determined."); |
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$result = 0; |
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} |
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|
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# check - do we have a mapping? |
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if (!$opts->{mapping} && !$opts->{mapping_module}) { |
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$logger->warning( __PACKAGE__ . "->checkOptions: Error while resolving resource metadata - no 'mapping' could be determined."); |
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$result = 0; |
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} |
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|
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return $result; |
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|
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} |
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|
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|
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# TODO: some feature to show off the progress of synchronization (cur/max * 100) |
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sub syncNodes { |
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|
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my $self = shift; |
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my $args = shift; |
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|
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if (!$self->{configured}) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Synchronization object is not configured/initialized correctly." ); |
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return; |
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} |
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|
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# remember arguments through the whole processing |
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$self->{args} = $args; |
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|
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$logger->debug( __PACKAGE__ . "->syncNodes: starting" ); |
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|
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# hash to hold and/or fill in metadata required for the processing |
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$self->{meta} = {}; |
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|
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# hash to sum up results |
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my $direction_arrow = ''; |
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|
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# detect synchronization method to determine which optical symbol (directed arrow) to use |
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if (lc $self->{args}->{direction} eq 'push') { |
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$direction_arrow = '->'; |
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} elsif (lc $self->{args}->{direction} eq 'pull') { |
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$direction_arrow = '<-'; |
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} elsif (lc $self->{args}->{direction} eq 'full') { |
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$direction_arrow = '<->'; |
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} else { |
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} |
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|
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# decompose identifiers for each partner |
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# TODO: refactor!!! take this list from already established/given metadata |
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foreach ('source', 'target') { |
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|
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# get/set metadata for further processing |
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|
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# Partner and Node (e.g.: "L:Country" or "R:countries.csv") |
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if (my $item = $self->{args}->{$_}) { |
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my @item = split(':', $item); |
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$self->{meta}->{$_}->{dbkey} = $item[0]; |
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$self->{meta}->{$_}->{node} = $item[1]; |
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} |
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|
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# Filter |
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if (my $item_filter = $self->{args}->{$_ . '_filter'}) { |
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$self->{meta}->{$_}->{filter} = $item_filter; |
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} |
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|
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# IdentProvider |
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if (my $item_ident = $self->{args}->{$_ . '_ident'}) { |
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my @item_ident = split(':', $item_ident); |
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$self->{meta}->{$_}->{IdentProvider} = { method => $item_ident[0], arg => $item_ident[1] }; |
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} |
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|
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# TODO: ChecksumProvider |
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|
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# exclude properties/subnodes |
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if (my $item_exclude = $self->{args}->{$_ . '_exclude'}) { |
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$self->{meta}->{$_}->{subnodes_exclude} = $item_exclude; |
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} |
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|
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# TypeProvider |
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if (my $item_type = $self->{args}->{$_ . '_type'}) { |
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my @item_type = split(':', $item_type); |
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$self->{meta}->{$_}->{TypeProvider} = { method => $item_type[0], arg => $item_type[1] }; |
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} |
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|
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# Callbacks - writers (will be triggered _before_ writing to target) |
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if (my $item_writers = $self->{args}->{$_ . '_callbacks_write'}) { |
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my $descent = $_; # this is important since the following code inside the map wants to use its own context variables |
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map { $self->{meta}->{$descent}->{Callback}->{write}->{$_}++; } @$item_writers; |
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} |
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|
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# Callbacks - readers (will be triggered _after_ reading from source) |
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if (my $item_readers = $self->{args}->{$_ . '_callbacks_read'}) { |
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my $descent = $_; |
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map { $self->{meta}->{$descent}->{Callback}->{read}->{$_}++; } @$item_readers; |
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} |
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|
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# resolve storage objects |
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#$self->{$_} = $self->{container}->{storage}->{$self->{meta}->{$_}->{dbkey}}; |
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# relink references to metainfo |
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$self->{meta}->{$_}->{storage} = $self->{container}->{storage}->{$self->{meta}->{$_}->{dbkey}}; |
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#print "iiiiisprov: ", Dumper($self->{meta}->{$_}->{storage}), "\n"; |
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} |
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|
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#print Dumper($self->{meta}); |
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|
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$logger->info( __PACKAGE__ . "->syncNodes: source=$self->{meta}->{source}->{dbkey}/$self->{meta}->{source}->{node} $direction_arrow target=$self->{meta}->{target}->{dbkey}/$self->{meta}->{target}->{node}" ); |
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|
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# build mapping |
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# incoming: and Array of node map entries (Array or Hash) - e.g. |
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# [ 'source:item_name' => 'target:class_val' ] |
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# { source => 'event->startDateTime', target => 'begindate' } |
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foreach (@{$self->{args}->{mapping}}) { |
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if (ref $_ eq 'ARRAY') { |
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my @entry1 = split(':', $_->[0]); |
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my @entry2 = split(':', $_->[1]); |
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my $descent = []; |
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my $node = []; |
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$descent->[0] = $entry1[0]; |
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$descent->[1] = $entry2[0]; |
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$node->[0] = $entry1[1]; |
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$node->[1] = $entry2[1]; |
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push @{$self->{meta}->{$descent->[0]}->{childnodes}}, $node->[0]; |
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push @{$self->{meta}->{$descent->[1]}->{childnodes}}, $node->[1]; |
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} elsif (ref $_ eq 'HASH') { |
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foreach my $entry_key (keys %$_) { |
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my $entry_val = $_->{$entry_key}; |
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push @{$self->{meta}->{$entry_key}->{childnodes}}, $entry_val; |
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} |
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} |
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|
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} |
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|
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#print Dumper($self->{meta}); |
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|
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# check partners/nodes: does partner exist / is node available? |
325 |
foreach my $partner (keys %{$self->{meta}}) { |
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|
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# 1. check partners & storages |
328 |
if (!$self->{meta}->{$partner}) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Could not find partner '$partner' in configuration metadata." ); |
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return; |
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} |
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|
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my $dbkey = $self->{meta}->{$partner}->{dbkey}; |
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|
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if (!$self->{meta}->{$partner}->{storage}) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Could not access storage of partner '$partner' (named '$dbkey'), looks like a configuration-error." ); |
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return; |
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} |
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|
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# TODO: |
341 |
# 2. check if partners (and nodes?) are actually available.... |
342 |
# eventually pre-check mode of access-attempt (read/write) here to provide an "early-croak" if possible |
343 |
|
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# 3. check nodes |
345 |
next if $self->{meta}->{$partner}->{storage}->{locator}->{type} eq 'DBI'; # HACK for DBD::CSV - re-enable for others |
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# get node-name |
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my $node = $self->{meta}->{$partner}->{node}; |
348 |
if (!$self->{meta}->{$partner}->{storage}->existsChildNode($node)) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Could not reach node \"$node\" at partner \"$partner\"." ); |
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return; |
351 |
} |
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|
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} |
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|
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# TODO: |
356 |
# + if action == PUSH: start processing |
357 |
# -+ if action == PULL: swap metadata and start processing |
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# - if action == FULL: start processing, then swap metadata and (re-)start processing |
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|
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#print Dumper($self->{args}); |
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|
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# manipulate metainfo according to direction of synchronization |
363 |
if (lc $self->{args}->{direction} eq 'push') { |
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# just do it ... |
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} elsif (lc $self->{args}->{direction} eq 'pull') { |
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#print "=======SWAP", "\n"; |
367 |
# swap |
368 |
($self->{meta}->{source}, $self->{meta}->{target}) = |
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($self->{meta}->{target}, $self->{meta}->{source}); |
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} elsif (lc $self->{args}->{direction} eq 'full') { |
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} else { |
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} |
373 |
|
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# import flag means: prepare the source node to be syncable |
375 |
# this is useful if there are e.g. no "ident" or "checksum" columns yet inside a DBI like (row-based) storage |
376 |
if ($self->{args}->{prepare}) { |
377 |
$self->_prepareNode_MetaProperties('source'); |
378 |
$self->_prepareNode_DummyIdent('source'); |
379 |
#return; |
380 |
#$self->_erase_all($opts->{source_node}); |
381 |
} |
382 |
|
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# erase flag means: erase the target |
384 |
#if ($opts->{erase}) { |
385 |
if ($self->{args}->{erase}) { |
386 |
# TODO: move this method to the scope of the synchronization core and wrap it around different handlers |
387 |
#print "ERASE", "\n"; |
388 |
$self->_erase_all('target'); |
389 |
} |
390 |
|
391 |
$self->_syncNodes(); |
392 |
|
393 |
} |
394 |
|
395 |
|
396 |
# TODO: abstract the hardwired use of "source" and "target" in here somehow - hmmmm....... /(="§/%??? |
397 |
sub _syncNodes { |
398 |
|
399 |
my $self = shift; |
400 |
|
401 |
my $tc = OneLineDumpHash->new( {} ); |
402 |
my $results; |
403 |
|
404 |
# set of objects is already in $self->{args} |
405 |
# TODO: make independent of the terminology "object..." |
406 |
$results = $self->{args}->{objectSet} if $self->{args}->{objectSet}; |
407 |
|
408 |
# apply filter |
409 |
if (my $filter = $self->{meta}->{source}->{filter}) { |
410 |
#print Dumper($filter); |
411 |
#exit; |
412 |
$results ||= $self->_getNodeList('source', $filter); |
413 |
} |
414 |
|
415 |
# get reference to node list from convenient method provided by CORE-HANDLE |
416 |
#$results ||= $self->{source}->getListUnfiltered($self->{meta}->{source}->{node}); |
417 |
#$results ||= $self->{meta}->{source}->{storage}->getListUnfiltered($self->{meta}->{source}->{node}); |
418 |
$results ||= $self->_getNodeList('source'); |
419 |
|
420 |
# checkpoint: do we actually have a list to iterate through? |
421 |
if (!$results || !@{$results}) { |
422 |
$logger->notice( __PACKAGE__ . "->syncNodes: No nodes to synchronize." ); |
423 |
return; |
424 |
} |
425 |
|
426 |
# dereference |
427 |
my @results = @{$results}; |
428 |
|
429 |
# iterate through set |
430 |
foreach my $source_node_real (@results) { |
431 |
|
432 |
$tc->{total}++; |
433 |
|
434 |
#print "======================== iter", "\n"; |
435 |
|
436 |
# clone object (in case we have to modify it here) |
437 |
# TODO: |
438 |
# - is a "deep_copy" needed here if occouring modifications take place? |
439 |
# - puuhhhh, i guess a deep_copy would destroy tangram mechanisms? |
440 |
# - after all, just take care for now that this object doesn't get updated! |
441 |
my $source_node = $source_node_real; |
442 |
|
443 |
# modify entry - handle new style callbacks (the readers) |
444 |
#print Dumper($source_node); |
445 |
#exit; |
446 |
|
447 |
my $descent = 'source'; |
448 |
|
449 |
# handle callbacks right now while scanning them (asymmetric to the writers) |
450 |
my $map_callbacks = {}; |
451 |
if (my $callbacks = $self->{meta}->{$descent}->{Callback}) { |
452 |
|
453 |
my $error = 0; |
454 |
|
455 |
foreach my $node (keys %{$callbacks->{read}}) { |
456 |
|
457 |
my $object = $source_node; |
458 |
my $value; # = $source_node->{$node}; |
459 |
|
460 |
# ------------ half-redundant: make $self->callCallback($object, $value, $opts) |
461 |
my $perl_callback = $self->{meta}->{$descent}->{node} . '::' . $node . '_read'; |
462 |
my $evalstring = 'return ' . $perl_callback . '( { object => $object, property => $node, value => $value, storage => $self->{meta}->{$descent}->{storage} } );'; |
463 |
#print $evalstring, "\n"; exit; |
464 |
my $cb_result = eval($evalstring); |
465 |
if ($@) { |
466 |
die $@; |
467 |
$error = 1; |
468 |
print $@, "\n"; |
469 |
} |
470 |
# ------------ half-redundant: make $self->callCallback($object, $value, $opts) |
471 |
|
472 |
$source_node->{$node} = $cb_result; |
473 |
|
474 |
} |
475 |
|
476 |
} |
477 |
|
478 |
#print Dumper($source_node); |
479 |
|
480 |
# exclude defined fields (simply delete from object) |
481 |
map { delete $source_node->{$_} } @{$self->{meta}->{source}->{subnodes_exclude}}; |
482 |
|
483 |
# here we accumulate information about the status of the current node (payload/row/object/item/entry) |
484 |
$self->{node} = {}; |
485 |
$self->{node}->{source}->{payload} = $source_node; |
486 |
|
487 |
#print "res - ident", "\n"; |
488 |
|
489 |
# determine ident of entry |
490 |
my $identOK = $self->_resolveNodeIdent('source'); |
491 |
#if (!$identOK && lc $self->{args}->{direction} ne 'import') { |
492 |
if (!$identOK) { |
493 |
#print Dumper($self->{meta}->{source}); |
494 |
$logger->critical( __PACKAGE__ . "->syncNodes: No ident found in source node \"$self->{meta}->{source}->{node}\", try to \"prepare\" this node first?" ); |
495 |
return; |
496 |
} |
497 |
|
498 |
#print "statload", "\n"; |
499 |
#print "ident: ", $self->{node}->{source}->{ident}, "\n"; |
500 |
#print Dumper($self->{node}); |
501 |
|
502 |
my $statOK = $self->_statloadNode('target', $self->{node}->{source}->{ident}); |
503 |
|
504 |
#print Dumper($self->{node}); |
505 |
|
506 |
# mark node as new either if there's no ident or if stat/load failed |
507 |
if (!$statOK) { |
508 |
$self->{node}->{status}->{new} = 1; |
509 |
print "n" if $self->{verbose}; |
510 |
} |
511 |
|
512 |
#print "checksum", "\n"; |
513 |
|
514 |
# determine status of entry by synchronization method |
515 |
if ( (lc $self->{args}->{method} eq 'checksum') ) { |
516 |
#if ( $statOK && (lc $self->{args}->{method} eq 'checksum') ) { |
517 |
#if ( !$self->{node}->{status}->{new} && (lc $self->{args}->{method} eq 'checksum') ) { |
518 |
|
519 |
# TODO: |
520 |
# is this really worth a "critical"??? |
521 |
# no - it should just be a debug appendix i believe |
522 |
|
523 |
#print "readcs", "\n"; |
524 |
|
525 |
# calculate checksum of source node |
526 |
#$self->_calcChecksum('source'); |
527 |
if (!$self->_readChecksum('source')) { |
528 |
$logger->critical( __PACKAGE__ . "->_readChecksum: Could not find \"source\" entry with ident=\"$self->{node}->{source}->{ident}\"" ); |
529 |
$tc->{skip}++; |
530 |
print "s" if $self->{verbose}; |
531 |
next; |
532 |
} |
533 |
|
534 |
# get checksum from synchronization target |
535 |
$self->_readChecksum('target'); |
536 |
#if (!$self->_readChecksum('target')) { |
537 |
# $logger->critical( __PACKAGE__ . "->_readChecksum: Could not find \"target\" entry with ident=\"$self->{node}->{source}->{ident}\"" ); |
538 |
# next; |
539 |
#} |
540 |
|
541 |
# pre flight check: do we actually have a checksum provided? |
542 |
#if (!$self->{node}->{source}->{checksum}) { |
543 |
# print "Source checksum for entry with ident \"$self->{node}->{source}->{ident}\" could not be calculated, maybe it's missing?.", "\n"; |
544 |
# return; |
545 |
#} |
546 |
|
547 |
# determine if entry is "new" or "dirty" |
548 |
# after all, this seems to be the point where the hammer falls..... |
549 |
print "c" if $self->{verbose}; |
550 |
$self->{node}->{status}->{new} = !$self->{node}->{target}->{checksum}; |
551 |
if (!$self->{node}->{status}->{new}) { |
552 |
$self->{node}->{status}->{dirty} = |
553 |
$self->{node}->{status}->{new} || |
554 |
(!$self->{node}->{source}->{checksum} || !$self->{node}->{target}->{checksum}) || |
555 |
($self->{node}->{source}->{checksum} ne $self->{node}->{target}->{checksum}) || |
556 |
$self->{args}->{force}; |
557 |
} |
558 |
|
559 |
} |
560 |
|
561 |
# first reaction on entry-status: continue with next entry if the current is already "in sync" |
562 |
if (!$self->{node}->{status}->{new} && !$self->{node}->{status}->{dirty}) { |
563 |
$tc->{in_sync}++; |
564 |
next; |
565 |
} |
566 |
|
567 |
# build map to actually transfer the data from source to target |
568 |
$self->_buildMap(); |
569 |
|
570 |
|
571 |
#print Dumper($self->{node}); exit; |
572 |
|
573 |
#print "attempt", "\n"; |
574 |
|
575 |
# additional (new) checks for feature "write-protection" |
576 |
if ($self->{meta}->{target}->{storage}->{isWriteProtected}) { |
577 |
$tc->{attempt_transfer}++; |
578 |
print "\n" if $self->{verbose}; |
579 |
$logger->notice( __PACKAGE__ . "->syncNodes: Target is write-protected. Will not insert or modify node. " . |
580 |
"(Ident: $self->{node}->{source}->{ident} " . "Dump:\n" . Dumper($self->{node}->{source}->{payload}) . ")" ); |
581 |
print "\n" if $self->{verbose}; |
582 |
$tc->{skip}++; |
583 |
next; |
584 |
} |
585 |
|
586 |
# transfer contents of map to target |
587 |
if ($self->{node}->{status}->{new}) { |
588 |
$tc->{attempt_new}++; |
589 |
$self->_doTransferToTarget('insert'); |
590 |
# asymmetry: refetch node from target to re-calculate new ident and checksum (TODO: is IdentAuthority of relevance here?) |
591 |
#print Dumper($self->{node}); |
592 |
$self->_statloadNode('target', $self->{node}->{target}->{ident}, 1); |
593 |
$self->_readChecksum('target'); |
594 |
|
595 |
} elsif ($self->{node}->{status}->{dirty}) { |
596 |
$tc->{attempt_modify}++; |
597 |
# asymmetry: get ident before updating (TODO: is IdentAuthority of relevance here?) |
598 |
$self->{node}->{target}->{ident} = $self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}}; |
599 |
$self->_doTransferToTarget('update'); |
600 |
$self->_readChecksum('target'); |
601 |
} |
602 |
|
603 |
if ($self->{node}->{status}->{ok}) { |
604 |
$tc->{ok}++; |
605 |
print "t" if $self->{verbose}; |
606 |
} |
607 |
|
608 |
if ($self->{node}->{status}->{error}) { |
609 |
$tc->{error}++; |
610 |
push( @{$tc->{error_per_row}}, $self->{node}->{status}->{error} ); |
611 |
print "e" if $self->{verbose}; |
612 |
} |
613 |
|
614 |
# change ident in source (take from target), if transfer was ok and target is an IdentAuthority |
615 |
# this is (for now) called a "retransmit" indicated by a "r"-character when verbosing |
616 |
if ($self->{node}->{status}->{ok} && $self->{meta}->{target}->{storage}->{isIdentAuthority}) { |
617 |
print "r" if $self->{verbose}; |
618 |
#print Dumper($self->{meta}); |
619 |
#print Dumper($self->{node}); |
620 |
#exit; |
621 |
$self->_doModifySource_IdentChecksum($self->{node}->{target}->{ident}); |
622 |
} |
623 |
|
624 |
print ":" if $self->{verbose}; |
625 |
|
626 |
} |
627 |
|
628 |
print "\n" if $self->{verbose}; |
629 |
|
630 |
# build user-message from some stats |
631 |
my $msg = "statistics: $tc"; |
632 |
|
633 |
if ($tc->{error_per_row}) { |
634 |
$msg .= "\n"; |
635 |
$msg .= "errors from \"error_per_row\":" . "\n"; |
636 |
$msg .= Dumper($tc->{error_per_row}); |
637 |
} |
638 |
|
639 |
# todo!!! |
640 |
#sysevent( { usermsg => $msg, level => $level }, $taskEvent ); |
641 |
$logger->info( __PACKAGE__ . "->syncNodes: $msg" ); |
642 |
|
643 |
return $tc; |
644 |
|
645 |
} |
646 |
|
647 |
|
648 |
# refactor this as some core-function to do a generic dump resolving data-encapsulations of e.g. Set::Object |
649 |
sub _dumpCompact { |
650 |
my $self = shift; |
651 |
|
652 |
#my $vars = \@_; |
653 |
my @data = (); |
654 |
|
655 |
my $count = 0; |
656 |
foreach (@_) { |
657 |
my $item = {}; |
658 |
foreach my $key (keys %$_) { |
659 |
my $val = $_->{$key}; |
660 |
|
661 |
#print Dumper($val); |
662 |
|
663 |
if (ref $val eq 'Set::Object') { |
664 |
#print "========================= SET", "\n"; |
665 |
#print Dumper($val); |
666 |
#print Dumper($val->members()); |
667 |
#$val = $val->members(); |
668 |
#$vars->[$count]->{$key} = $val->members() if $val->can("members"); |
669 |
#$item->{$key} = $val->members() if $val->can("members"); |
670 |
$item->{$key} = $val->members(); |
671 |
#print Dumper($vars->[$count]->{$key}); |
672 |
|
673 |
} else { |
674 |
$item->{$key} = $val; |
675 |
} |
676 |
|
677 |
} |
678 |
push @data, $item; |
679 |
$count++; |
680 |
} |
681 |
|
682 |
#print "Dump:", Dumper(@data), "\n"; |
683 |
|
684 |
$Data::Dumper::Indent = 0; |
685 |
my $result = Dumper(@data); |
686 |
$Data::Dumper::Indent = 2; |
687 |
return $result; |
688 |
|
689 |
} |
690 |
|
691 |
|
692 |
sub _calcChecksum { |
693 |
|
694 |
my $self = shift; |
695 |
my $descent = shift; |
696 |
my $specifier = shift; |
697 |
|
698 |
# calculate checksum for current object |
699 |
my $ident = $self->{node}->{$descent}->{ident}; |
700 |
|
701 |
# build dump of this node |
702 |
my $payload = $self->{node}->{$descent}->{payload}; |
703 |
#my $dump = $ident . "\n" . $item->quickdump(); |
704 |
#my $dump = $ident . "\n" . Dumper($item); |
705 |
my $dump = $ident . "\n" . $self->_dumpCompact($payload); |
706 |
|
707 |
# TODO: $logger->dump( ... ); |
708 |
#$logger->debug( __PACKAGE__ . ": " . $dump ); |
709 |
#$logger->dump( __PACKAGE__ . ": " . $dump ); |
710 |
|
711 |
# calculate checksum from dump |
712 |
# md5-based fingerprint, base64 encoded (from Digest::MD5) |
713 |
#my $checksum_cur = md5_base64($objdump) . '=='; |
714 |
# 32-bit integer "hash" value (maybe faster?) (from DBI) |
715 |
$self->{node}->{$descent}->{checksum} = DBI::hash($dump, 1); |
716 |
|
717 |
# signal good |
718 |
return 1; |
719 |
|
720 |
} |
721 |
|
722 |
|
723 |
sub _readChecksum { |
724 |
my $self = shift; |
725 |
|
726 |
my $descent = shift; |
727 |
|
728 |
#print "getcheck:", "\n"; print Dumper($self->{node}->{$descent}); |
729 |
|
730 |
if (!$self->{node}->{$descent}) { |
731 |
# signal checksum bad |
732 |
return; |
733 |
} |
734 |
|
735 |
# get checksum for current entry |
736 |
# TODO: don't have the checksum column/property hardcoded as "cs" here, make this configurable somehow |
737 |
|
738 |
if ($self->{meta}->{$descent}->{storage}->{isChecksumAuthority}) { |
739 |
#$self->{node}->{$descent}->{checksum} = $entry->{cs}; |
740 |
#$self->{node}->{$descent}->{checksum} = $self->_calcChecksum($descent); # $entry->{cs}; |
741 |
#print "descent: $descent", "\n"; |
742 |
$self->_calcChecksum($descent); |
743 |
#print "checksum: ", $self->{node}->{$descent}->{checksum}, "\n"; |
744 |
} else { |
745 |
|
746 |
#$self->{node}->{$descent}->{checksum} = $entry->{cs}; |
747 |
$self->{node}->{$descent}->{checksum} = $self->{node}->{$descent}->{payload}->{cs}; |
748 |
} |
749 |
|
750 |
# signal checksum good |
751 |
return 1; |
752 |
|
753 |
} |
754 |
|
755 |
|
756 |
sub _buildMap { |
757 |
|
758 |
my $self = shift; |
759 |
|
760 |
# field-structure for building sql |
761 |
# mapping of sql-fieldnames to object-attributes |
762 |
$self->{node}->{map} = {}; |
763 |
|
764 |
# manually set ... |
765 |
# ... object-id |
766 |
$self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}} = $self->{node}->{source}->{ident}; |
767 |
# ... checksum |
768 |
$self->{node}->{map}->{cs} = $self->{node}->{source}->{checksum}; |
769 |
|
770 |
#print "sqlmap: ", Dumper($self->{node}->{map}), "\n"; |
771 |
|
772 |
# for transferring flat structures via simple (1:1) mapping |
773 |
# TODO: diff per property / property value |
774 |
|
775 |
if ($self->{args}->{mapping}) { |
776 |
# apply mapping from $self->{args}->{mapping} to $self->{node}->{map} |
777 |
#foreach my $key (@{$self->{meta}->{source}->{childnodes}}) { |
778 |
my @childnodes = @{$self->{meta}->{source}->{childnodes}}; |
779 |
for (my $mapidx = 0; $mapidx <= $#childnodes; $mapidx++) { |
780 |
#my $map_right = $self->{args}->{mapping}->{$key}; |
781 |
|
782 |
$self->{node}->{source}->{propcache} = {}; |
783 |
$self->{node}->{target}->{propcache} = {}; |
784 |
|
785 |
# get property name |
786 |
$self->{node}->{source}->{propcache}->{property} = $self->{meta}->{source}->{childnodes}->[$mapidx]; |
787 |
$self->{node}->{target}->{propcache}->{property} = $self->{meta}->{target}->{childnodes}->[$mapidx]; |
788 |
#print "map: $map_right", "\n"; |
789 |
|
790 |
# get property value |
791 |
my $value; |
792 |
|
793 |
# detect for callback - old style - (maybe the better???) |
794 |
if (ref($self->{node}->{target}->{map}) eq 'CODE') { |
795 |
#$value = &$map_right($objClone); |
796 |
} else { |
797 |
# plain (scalar?) value |
798 |
#$value = $objClone->{$map_right}; |
799 |
$self->{node}->{source}->{propcache}->{value} = $self->{node}->{source}->{payload}->{$self->{node}->{source}->{propcache}->{property}}; |
800 |
} |
801 |
#$self->{node}->{map}->{$key} = $value; |
802 |
|
803 |
# detect expression |
804 |
# for transferring deeply nested structures described by expressions |
805 |
#print "val: $self->{node}->{source}->{propcache}->{value}", "\n"; |
806 |
if ($self->{node}->{source}->{propcache}->{property} =~ s/^expr://) { |
807 |
|
808 |
# create an anonymous sub to act as callback target dispatcher |
809 |
my $cb_dispatcher = sub { |
810 |
#print "=============== CALLBACK DISPATCHER", "\n"; |
811 |
#print "ident: ", $self->{node}->{source}->{ident}, "\n"; |
812 |
#return $self->{node}->{source}->{ident}; |
813 |
|
814 |
}; |
815 |
|
816 |
|
817 |
#print Dumper($self->{node}); |
818 |
|
819 |
# build callback map for helper function |
820 |
#my $cbmap = { $self->{meta}->{source}->{IdentProvider}->{arg} => $cb_dispatcher }; |
821 |
my $cbmap = {}; |
822 |
my $value = refexpr2perlref($self->{node}->{source}->{payload}, $self->{node}->{source}->{propcache}->{property}, $cbmap); |
823 |
$self->{node}->{source}->{propcache}->{value} = $value; |
824 |
} |
825 |
|
826 |
# encode values dependent on type of underlying storage here - expand cases... |
827 |
my $storage_type = $self->{meta}->{target}->{storage}->{locator}->{type}; |
828 |
if ($storage_type eq 'DBI') { |
829 |
# ...for sql |
830 |
$self->{node}->{source}->{propcache}->{value} = quotesql($self->{node}->{source}->{propcache}->{value}); |
831 |
} |
832 |
elsif ($storage_type eq 'Tangram') { |
833 |
# iso? utf8 already possible? |
834 |
|
835 |
} elsif ($storage_type eq 'LDAP') { |
836 |
# TODO: encode utf8 here? |
837 |
} |
838 |
|
839 |
# store value to transfer map |
840 |
$self->{node}->{map}->{$self->{node}->{target}->{propcache}->{property}} = $self->{node}->{source}->{propcache}->{value}; |
841 |
|
842 |
} |
843 |
} |
844 |
|
845 |
|
846 |
# TODO: $logger->dump( ... ); |
847 |
#$logger->debug( "sqlmap:" . "\n" . Dumper($self->{node}->{map}) ); |
848 |
#print "sqlmap: ", Dumper($self->{node}->{map}), "\n"; |
849 |
#print "entrystatus: ", Dumper($self->{node}), "\n"; |
850 |
|
851 |
} |
852 |
|
853 |
sub _resolveNodeIdent { |
854 |
my $self = shift; |
855 |
my $descent = shift; |
856 |
|
857 |
#print Dumper($self->{node}->{$descent}); |
858 |
|
859 |
# get to the payload |
860 |
#my $item = $specifier->{item}; |
861 |
my $payload = $self->{node}->{$descent}->{payload}; |
862 |
|
863 |
# resolve method to get to the id of the given item |
864 |
# we use global metadata and the given descent for this task |
865 |
#my $ident = $self->{$descent}->id($item); |
866 |
#my $ident = $self->{meta}->{$descent}->{storage}->id($item); |
867 |
|
868 |
my $ident; |
869 |
my $provider_method = $self->{meta}->{$descent}->{IdentProvider}->{method}; |
870 |
my $provider_arg = $self->{meta}->{$descent}->{IdentProvider}->{arg}; |
871 |
|
872 |
# resolve to ident |
873 |
if ($provider_method eq 'property') { |
874 |
$ident = $payload->{$provider_arg}; |
875 |
|
876 |
} elsif ($provider_method eq 'storage_method') { |
877 |
#$ident = $self->{meta}->{$descent}->{storage}->id($item); |
878 |
$ident = $self->{meta}->{$descent}->{storage}->$provider_arg($payload); |
879 |
} |
880 |
|
881 |
$self->{node}->{$descent}->{ident} = $ident; |
882 |
|
883 |
return 1 if $ident; |
884 |
|
885 |
} |
886 |
|
887 |
|
888 |
sub _modifyNode { |
889 |
my $self = shift; |
890 |
my $descent = shift; |
891 |
my $action = shift; |
892 |
my $map = shift; |
893 |
my $crit = shift; |
894 |
|
895 |
# map for new style callbacks |
896 |
my $map_callbacks = {}; |
897 |
|
898 |
# checks go first! |
899 |
|
900 |
# TODO: this should be reviewed first - before extending ;-) |
901 |
# TODO: this should be extended: |
902 |
# count this cases inside the caller to this sub and provide a better overall message |
903 |
# if this counts still zero in the end: |
904 |
# "No nodes have been touched for modify: Do you have column-headers in your csv file?" |
905 |
if (not defined $self->{node}) { |
906 |
#$logger->critical( __PACKAGE__ . "->_modifyNode failed: \"$descent\" node is empty." ); |
907 |
#return; |
908 |
} |
909 |
|
910 |
# transfer callback nodes from value map to callback map - handle them afterwards! - (new style callbacks) |
911 |
if (my $callbacks = $self->{meta}->{$descent}->{Callback}) { |
912 |
foreach my $callback (keys %{$callbacks->{write}}) { |
913 |
$map_callbacks->{write}->{$callback} = $map->{$callback}; |
914 |
delete $map->{$callback}; |
915 |
} |
916 |
} |
917 |
|
918 |
|
919 |
#print Dumper($self->{meta}); |
920 |
|
921 |
# DBI speaks SQL |
922 |
if ($self->{meta}->{$descent}->{storage}->{locator}->{type} eq 'DBI') { |
923 |
|
924 |
#print Dumper($self->{node}); |
925 |
my $sql_main; |
926 |
# translate map to sql |
927 |
#print $action, "\n"; exit; |
928 |
#print $self->{meta}->{$descent}->{node}, "\n"; exit; |
929 |
#print "action:"; |
930 |
#print $action, "\n"; |
931 |
#$action = "anc"; |
932 |
#print "yai", "\n"; |
933 |
|
934 |
#print Dumper($map); |
935 |
#delete $map->{cs}; |
936 |
|
937 |
if (lc($action) eq 'insert') { |
938 |
$sql_main = hash2Sql($self->{meta}->{$descent}->{node}, $map, 'SQL_INSERT'); |
939 |
} elsif (lc $action eq 'update') { |
940 |
$crit ||= "$self->{meta}->{$descent}->{IdentProvider}->{arg}='$self->{node}->{$descent}->{ident}'"; |
941 |
$sql_main = hash2Sql($self->{meta}->{$descent}->{node}, $map, 'SQL_UPDATE', $crit); |
942 |
} |
943 |
|
944 |
#$sql_main = "UPDATE currencies_csv SET oid='abcdef' WHERE text='Australian Dollar' AND key='AUD';"; |
945 |
#$sql_main = "UPDATE currencies_csv SET oid='huhu2' WHERE ekey='AUD'"; |
946 |
|
947 |
#print "sql: ", $sql_main, "\n"; |
948 |
#exit; |
949 |
|
950 |
# transfer data |
951 |
my $sqlHandle = $self->{meta}->{$descent}->{storage}->sendCommand($sql_main); |
952 |
|
953 |
#exit; |
954 |
|
955 |
# handle errors |
956 |
if ($sqlHandle->err) { |
957 |
#if ($self->{args}->{debug}) { print "sql-error with statement: $sql_main", "\n"; } |
958 |
$self->{node}->{status}->{error} = { |
959 |
statement => $sql_main, |
960 |
state => $sqlHandle->state, |
961 |
err => $sqlHandle->err, |
962 |
errstr => $sqlHandle->errstr, |
963 |
}; |
964 |
} else { |
965 |
$self->{node}->{status}->{ok} = 1; |
966 |
} |
967 |
|
968 |
# Tangram does it the oo-way (naturally) |
969 |
} elsif ($self->{meta}->{$descent}->{storage}->{locator}->{type} eq 'Tangram') { |
970 |
my $sql_main; |
971 |
my $object; |
972 |
|
973 |
# determine classname |
974 |
my $classname = $self->{meta}->{$descent}->{node}; |
975 |
|
976 |
# properties to exclude |
977 |
my @exclude = @{$self->{meta}->{$descent}->{subnodes_exclude}}; |
978 |
|
979 |
|
980 |
if (my $identProvider = $self->{meta}->{$descent}->{IdentProvider}) { |
981 |
push @exclude, $identProvider->{arg}; |
982 |
} |
983 |
|
984 |
# new feature: |
985 |
# - check TypeProvider metadata property from other side |
986 |
# - use argument (arg) inside as a classname for object creation on this side |
987 |
#my $otherSide = $self->_otherSide($descent); |
988 |
if (my $typeProvider = $self->{meta}->{$descent}->{TypeProvider}) { |
989 |
#print Dumper($map); |
990 |
$classname = $map->{$typeProvider->{arg}}; |
991 |
# remove nodes from map also (push nodes to "subnodes_exclude" list) |
992 |
push @exclude, $typeProvider->{arg}; |
993 |
} |
994 |
|
995 |
# exclude banned properties (remove from map) |
996 |
#map { delete $self->{node}->{map}->{$_} } @{$self->{args}->{exclude}}; |
997 |
map { delete $map->{$_} } @exclude; |
998 |
|
999 |
# list of properties |
1000 |
my @props = keys %{$map}; |
1001 |
|
1002 |
# transfer data |
1003 |
if (lc $action eq 'insert') { |
1004 |
|
1005 |
# build array to initialize object |
1006 |
#my @initarray = (); |
1007 |
#map { push @initarray, $_, undef; } @props; |
1008 |
|
1009 |
# make the object persistent in four steps: |
1010 |
# - raw create (perl / class tangram scope) |
1011 |
# - engine insert (tangram scope) ... this establishes inheritance - don't try to fill in inherited properties before! |
1012 |
# - raw fill-in from hash (perl scope) |
1013 |
# - engine update (tangram scope) ... this updates all properties just filled in |
1014 |
|
1015 |
# create new object ... |
1016 |
#my $object = $classname->new( @initarray ); |
1017 |
$object = $classname->new(); |
1018 |
|
1019 |
# ... pass to orm ... |
1020 |
$self->{meta}->{$descent}->{storage}->insert($object); |
1021 |
|
1022 |
# ... and initialize with empty (undef'd) properties. |
1023 |
#print Dumper(@props); |
1024 |
map { $object->{$_} = undef; } @props; |
1025 |
|
1026 |
# mix in values ... |
1027 |
hash2object($object, $map); |
1028 |
|
1029 |
# ... and re-update@orm. |
1030 |
#print Dumper($object); |
1031 |
$self->{meta}->{$descent}->{storage}->update($object); |
1032 |
|
1033 |
# asymmetry: get ident after insert |
1034 |
# TODO: |
1035 |
# - just do this if it is an IdentAuthority |
1036 |
# - use IdentProvider metadata here |
1037 |
#print Dumper($self->{meta}->{$descent}); |
1038 |
my $oid = $self->{meta}->{$descent}->{storage}->id($object); |
1039 |
#print "oid: $oid", "\n"; |
1040 |
$self->{node}->{$descent}->{ident} = $oid; |
1041 |
|
1042 |
|
1043 |
} elsif (lc $action eq 'update') { |
1044 |
|
1045 |
# get fresh object from orm first |
1046 |
$object = $self->{meta}->{$descent}->{storage}->load($self->{node}->{$descent}->{ident}); |
1047 |
|
1048 |
#print Dumper($self->{node}); |
1049 |
|
1050 |
# mix in values |
1051 |
#print Dumper($object); |
1052 |
hash2object($object, $map); |
1053 |
#print Dumper($object); |
1054 |
#exit; |
1055 |
$self->{meta}->{$descent}->{storage}->update($object); |
1056 |
} |
1057 |
|
1058 |
my $error = 0; |
1059 |
|
1060 |
# handle new style callbacks - this is a HACK - do this without an eval! |
1061 |
#print Dumper($map); |
1062 |
#print "cb: ", Dumper($self->{meta}->{$descent}->{Callback}); |
1063 |
#print Dumper($map_callbacks); |
1064 |
foreach my $node (keys %{$map_callbacks->{write}}) { |
1065 |
#print Dumper($node); |
1066 |
my $perl_callback = $self->{meta}->{$descent}->{node} . '::' . $node . '_write'; |
1067 |
my $evalstring = $perl_callback . '( { object => $object, value => $map_callbacks->{write}->{$node}, storage => $self->{meta}->{$descent}->{storage} } );'; |
1068 |
#print $evalstring, "\n"; exit; |
1069 |
eval($evalstring); |
1070 |
if ($@) { |
1071 |
$error = 1; |
1072 |
print $@, "\n"; |
1073 |
} |
1074 |
|
1075 |
#print "after eval", "\n"; |
1076 |
|
1077 |
if (!$error) { |
1078 |
# re-update@orm |
1079 |
$self->{meta}->{$descent}->{storage}->update($object); |
1080 |
} |
1081 |
} |
1082 |
|
1083 |
# handle errors |
1084 |
if ($error) { |
1085 |
#print "error", "\n"; |
1086 |
=pod |
1087 |
my $sqlHandle; |
1088 |
#if ($self->{args}->{debug}) { print "sql-error with statement: $sql_main", "\n"; } |
1089 |
$self->{node}->{status}->{error} = { |
1090 |
statement => $sql_main, |
1091 |
state => $sqlHandle->state, |
1092 |
err => $sqlHandle->err, |
1093 |
errstr => $sqlHandle->errstr, |
1094 |
}; |
1095 |
=cut |
1096 |
# rollback.... |
1097 |
#print "rollback", "\n"; |
1098 |
$self->{meta}->{$descent}->{storage}->erase($object); |
1099 |
#print "after rollback", "\n"; |
1100 |
} else { |
1101 |
$self->{node}->{status}->{ok} = 1; |
1102 |
} |
1103 |
|
1104 |
|
1105 |
} |
1106 |
|
1107 |
} |
1108 |
|
1109 |
# TODO: |
1110 |
# this should be split up into... |
1111 |
# - a "_statNode" (should just touch the node to check for existance) |
1112 |
# - a "_loadNode" (should load node completely) |
1113 |
# - maybe additionally a "loadNodeProperty" (may specify properties to load) |
1114 |
# - introduce $self->{nodecache} for this purpose |
1115 |
# TODO: |
1116 |
# should we: |
1117 |
# - not pass ident in here but resolve it via "$descent"? |
1118 |
# - refactor this and stuff it with additional debug/error message |
1119 |
# - this = the way the implicit load mechanism works |
1120 |
sub _statloadNode { |
1121 |
|
1122 |
my $self = shift; |
1123 |
my $descent = shift; |
1124 |
my $ident = shift; |
1125 |
my $force = shift; |
1126 |
|
1127 |
# fetch entry to retrieve checksum from |
1128 |
# was: |
1129 |
if (!$self->{node}->{$descent} || $force) { |
1130 |
# is: |
1131 |
#if (!$self->{node}->{$descent}->{item} || $force) { |
1132 |
|
1133 |
if (!$ident) { |
1134 |
#print "\n", "Attempt to fetch entry implicitely by ident failed: no ident given! This may result in an insert if no write-protection is in the way.", "\n"; |
1135 |
return; |
1136 |
} |
1137 |
|
1138 |
# patch for DBD::CSV |
1139 |
if ($ident && $ident eq 'Null') { |
1140 |
return; |
1141 |
} |
1142 |
|
1143 |
#print "yai!", "\n"; |
1144 |
|
1145 |
my $query = { |
1146 |
node => $self->{meta}->{$descent}->{node}, |
1147 |
subnodes => [qw( cs )], |
1148 |
criterias => [ |
1149 |
{ key => $self->{meta}->{$descent}->{IdentProvider}->{arg}, |
1150 |
op => 'eq', |
1151 |
val => $ident }, |
1152 |
] |
1153 |
}; |
1154 |
|
1155 |
#print Dumper($query); |
1156 |
|
1157 |
my $result = $self->{meta}->{$descent}->{storage}->sendQuery($query); |
1158 |
|
1159 |
my $entry = $result->getNextEntry(); |
1160 |
|
1161 |
#print Dumper($entry); |
1162 |
#print "pers: " . $self->{meta}->{$descent}->{storage}->is_persistent($entry), "\n"; |
1163 |
#my $state = $self->{meta}->{$descent}->{storage}->_fetch_object_state($entry, { name => 'TransactionHop' } ); |
1164 |
#print Dumper($state); |
1165 |
|
1166 |
my $status = $result->getStatus(); |
1167 |
|
1168 |
#print Dumper($status); |
1169 |
|
1170 |
# TODO: enhance error handling (store inside tc) |
1171 |
#if (!$row) { |
1172 |
# print "\n", "row error", "\n"; |
1173 |
# next; |
1174 |
#} |
1175 |
|
1176 |
# these checks run before actually loading payload- and meta-data to node-container |
1177 |
|
1178 |
# 1st level - hard error |
1179 |
if ($status && $status->{err}) { |
1180 |
$logger->debug( __PACKAGE__ . "->_statloadNode (ident=\"$ident\") failed - hard error (that's ok): $status->{err}" ); |
1181 |
return; |
1182 |
} |
1183 |
|
1184 |
# 2nd level - logical (empty/notfound) error |
1185 |
if (($status && $status->{empty}) || !$entry) { |
1186 |
$logger->debug( __PACKAGE__ . "->_statloadNode (ident=\"$ident\") failed - logical error (that's ok)" ); |
1187 |
#print "no entry (logical)", "\n"; |
1188 |
return; |
1189 |
} |
1190 |
|
1191 |
#print Dumper($entry); |
1192 |
|
1193 |
# was: |
1194 |
# $self->{node}->{$descent}->{ident} = $ident; |
1195 |
# is: |
1196 |
# TODO: re-resolve ident from entry via metadata "IdentProvider" here - like elsewhere |
1197 |
$self->{node}->{$descent}->{ident} = $ident; |
1198 |
$self->{node}->{$descent}->{payload} = $entry; |
1199 |
|
1200 |
} |
1201 |
|
1202 |
return 1; |
1203 |
|
1204 |
} |
1205 |
|
1206 |
sub _doTransferToTarget { |
1207 |
my $self = shift; |
1208 |
my $action = shift; |
1209 |
$self->_modifyNode('target', $action, $self->{node}->{map}); |
1210 |
} |
1211 |
|
1212 |
sub _doModifySource_IdentChecksum { |
1213 |
my $self = shift; |
1214 |
my $ident_new = shift; |
1215 |
# this changes an old node to a new one including ident and checksum |
1216 |
# TODO: |
1217 |
# - eventually introduce an external resource to store this data to |
1218 |
# - we won't have to "re"-modify the source node here |
1219 |
my $map = { |
1220 |
$self->{meta}->{source}->{IdentProvider}->{arg} => $ident_new, |
1221 |
cs => $self->{node}->{target}->{checksum}, |
1222 |
}; |
1223 |
|
1224 |
#print Dumper($map); |
1225 |
#print Dumper($self->{node}); |
1226 |
#exit; |
1227 |
|
1228 |
$self->_modifyNode('source', 'update', $map); |
1229 |
} |
1230 |
|
1231 |
|
1232 |
# this is a shortcut method |
1233 |
# ... let's try to avoid _any_ redundant code in here (ok... - at the cost of method lookups...) |
1234 |
sub _getNodeList { |
1235 |
my $self = shift; |
1236 |
my $descent = shift; |
1237 |
my $filter = shift; |
1238 |
return $self->{meta}->{$descent}->{storage}->getListFiltered($self->{meta}->{$descent}->{node}, $filter); |
1239 |
} |
1240 |
|
1241 |
|
1242 |
sub _prepareNode_MetaProperties { |
1243 |
my $self = shift; |
1244 |
my $descent = shift; |
1245 |
|
1246 |
$logger->info( __PACKAGE__ . "->_prepareNode_MetaProperties( descent $descent )" ); |
1247 |
|
1248 |
# TODO: this should (better) be: "my $firstnode = $self->_getFirstNode($descent);" |
1249 |
my $list = $self->_getNodeList($descent); |
1250 |
|
1251 |
# get first node |
1252 |
my $firstnode = $list->[0]; |
1253 |
|
1254 |
# check if node contains meta properties/nodes |
1255 |
# TODO: "cs" is hardcoded here! |
1256 |
my @required = ( $self->{meta}->{$descent}->{IdentProvider}->{arg}, 'cs' ); |
1257 |
my @found = keys %$firstnode; |
1258 |
#my @diff = getDifference(\@found, \@required); |
1259 |
my $diff = getDifference(\@required, \@found); |
1260 |
#print Dumper(@found); |
1261 |
#print Dumper(@required); |
1262 |
#print Dumper(@diff); |
1263 |
#if (!$#diff || $#diff == -1) { |
1264 |
if (isEmpty($diff)) { |
1265 |
$logger->warning( __PACKAGE__ . "->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter..." ); |
1266 |
foreach (@required) { |
1267 |
my $sql = "ALTER TABLE $self->{meta}->{$descent}->{node} ADD COLUMN $_"; |
1268 |
#print "sql: $sql", "\n"; |
1269 |
my $res = $self->{meta}->{$descent}->{storage}->sendCommand($sql); |
1270 |
#print Dumper($res->getStatus()); |
1271 |
} |
1272 |
} |
1273 |
|
1274 |
} |
1275 |
|
1276 |
sub _prepareNode_DummyIdent { |
1277 |
my $self = shift; |
1278 |
my $descent = shift; |
1279 |
|
1280 |
$logger->info( __PACKAGE__ . "->_prepareNode_DummyIdent( descent $descent )" ); |
1281 |
|
1282 |
my $list = $self->_getNodeList($descent); |
1283 |
#print Dumper($list); |
1284 |
my $i = 0; |
1285 |
my $ident_base = 5678983; |
1286 |
my $ident_appendix = '0001'; |
1287 |
foreach my $node (@$list) { |
1288 |
my $ident_dummy = $i + $ident_base; |
1289 |
$ident_dummy .= $ident_appendix; |
1290 |
my $map = { |
1291 |
$self->{meta}->{$descent}->{IdentProvider}->{arg} => $ident_dummy, |
1292 |
cs => undef, |
1293 |
}; |
1294 |
|
1295 |
# diff lists and ... |
1296 |
my $diff = getDifference([keys %$node], [keys %$map]); |
1297 |
next if $#{$diff} == -1; |
1298 |
|
1299 |
# ... build criteria including all columns |
1300 |
my @crits; |
1301 |
foreach my $property (@$diff) { |
1302 |
next if !$property; |
1303 |
my $value = $node->{$property}; |
1304 |
next if !$value; |
1305 |
push @crits, "$property='" . quotesql($value) . "'"; |
1306 |
} |
1307 |
my $crit = join ' AND ', @crits; |
1308 |
print "p" if $self->{verbose}; |
1309 |
|
1310 |
#print Dumper($map); |
1311 |
#print Dumper($crit); |
1312 |
|
1313 |
$self->_modifyNode($descent, 'update', $map, $crit); |
1314 |
$i++; |
1315 |
} |
1316 |
|
1317 |
print "\n" if $self->{verbose}; |
1318 |
|
1319 |
if (!$i) { |
1320 |
$logger->warning( __PACKAGE__ . "->_prepareNode_DummyIdent: no nodes touched" ); |
1321 |
} |
1322 |
|
1323 |
} |
1324 |
|
1325 |
# TODO: handle this in an abstract way (wipe out use of 'source' and/or 'target' inside core) |
1326 |
sub _otherSide { |
1327 |
my $self = shift; |
1328 |
my $descent = shift; |
1329 |
return 'source' if $descent eq 'target'; |
1330 |
return 'target' if $descent eq 'source'; |
1331 |
return ''; |
1332 |
} |
1333 |
|
1334 |
sub _erase_all { |
1335 |
my $self = shift; |
1336 |
my $descent = shift; |
1337 |
#my $node = shift; |
1338 |
my $node = $self->{meta}->{$descent}->{node}; |
1339 |
$self->{meta}->{$descent}->{storage}->eraseAll($node); |
1340 |
} |
1341 |
|
1342 |
|
1343 |
=pod |
1344 |
|
1345 |
|
1346 |
=head1 DESCRIPTION |
1347 |
|
1348 |
Data::Transfer::Sync is a module providing a generic synchronization process |
1349 |
across arbitrary/multiple storages based on a ident/checksum mechanism. |
1350 |
It sits on top of Data::Storage. |
1351 |
|
1352 |
|
1353 |
=head1 REQUIREMENTS |
1354 |
|
1355 |
For full functionality: |
1356 |
Data::Storage |
1357 |
Data::Transform |
1358 |
Data::Compare |
1359 |
... and all their dependencies |
1360 |
|
1361 |
|
1362 |
=head1 AUTHORS / COPYRIGHT |
1363 |
|
1364 |
The Data::Storage module is Copyright (c) 2002 Andreas Motl. |
1365 |
All rights reserved. |
1366 |
|
1367 |
You may distribute it under the terms of either the GNU General Public |
1368 |
License or the Artistic License, as specified in the Perl README file. |
1369 |
|
1370 |
|
1371 |
=head1 SUPPORT / WARRANTY |
1372 |
|
1373 |
Data::Storage is free software. IT COMES WITHOUT WARRANTY OF ANY KIND. |
1374 |
|
1375 |
|
1376 |
|
1377 |
=head1 BUGS |
1378 |
|
1379 |
When in "import" mode for windows file - DBD::AutoCSV may hang. |
1380 |
Hint: Maybe the source node contains an ident-, but no checksum-column? |
1381 |
|
1382 |
|
1383 |
=head1 USER LEVEL ERRORS |
1384 |
|
1385 |
=head4 Mapping |
1386 |
|
1387 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1388 |
info: BizWorks::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 )critical: BizWorks::Process::Setup->startSync: Can't access mapping for node "Currency" - please check BizWorks::ResourceMapping. |
1389 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1390 |
You have to create a sub for each node used in synchronization inside named Perl module. The name of this sub _must_ match |
1391 |
the name of the node you want to sync. This sub holds mapping metadata to give the engine hints about how |
1392 |
to access the otherwise generic nodes. |
1393 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1394 |
|
1395 |
|
1396 |
=head4 DBD::AutoCSV's rulebase |
1397 |
|
1398 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1399 |
info: BizWorks::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 ) |
1400 |
info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv |
1401 |
|
1402 |
Execution ERROR: Error while scanning: Missing first row or scanrule not applied. at C:/home/amo/develop/netfrag.org/nfo/perl/libs/DBD/CSV.p |
1403 |
m line 165, <GEN9> line 1. |
1404 |
called from C:/home/amo/develop/netfrag.org/nfo/perl/libs/Data/Storage/Handler/DBI.pm at 123. |
1405 |
|
1406 |
DBI-Error: DBD::AutoCSV::st fetchrow_hashref failed: Attempt to fetch row from a Non-SELECT statement |
1407 |
notice: Data::Transfer::Sync->syncNodes: No nodes to synchronize. |
1408 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1409 |
DBD::AutoCSV contains a rulebase which is spooled down while attempting to guess the style of the csv file regarding |
1410 |
parameters like newline (eol), column-seperation-character (sep_char), quoting character (quote_char). |
1411 |
If this spool runs out of entries and no style could be resolved, DBD::CSV dies causing this "Execution ERROR" which |
1412 |
results in a "DBI-Error" afterwards. |
1413 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1414 |
|
1415 |
|
1416 |
=head4 Check structure of source node |
1417 |
|
1418 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1419 |
info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv |
1420 |
critical: Data::Transfer::Sync->syncNodes: Can not synchronize: No ident found in source node, maybe try to "import" this node first. |
1421 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1422 |
If lowlevel detection succeeds, but no other required informations are found, this message is issued. |
1423 |
"Other informations" might be: |
1424 |
- column-header-row completely missing |
1425 |
- ident column is empty |
1426 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1427 |
|
1428 |
|
1429 |
=head4 Modify structure of source node |
1430 |
|
1431 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1432 |
info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv |
1433 |
info: Data::Transfer::Sync->_prepareNode_MetaProperties( descent source ) |
1434 |
warning: Data::Transfer::Sync->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter... |
1435 |
SQL ERROR: Command 'ALTER' not recognized or not supported! |
1436 |
|
1437 |
SQL ERROR: Command 'ALTER' not recognized or not supported! |
1438 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1439 |
The Engine found a node which structure does not match the required. It tries to alter this automatically - only when doing "import" - |
1440 |
but the DBD driver (in this case DBD::CSV) gets in the way croaking not to be able to do this. |
1441 |
This could also appear if your database connection has insufficient rights to modify the database structure. |
1442 |
DBD::CSV croaks because it doesn't implement the ALTER command, so please edit your columns manually. |
1443 |
Hint: Add columns with the names of your "ident" and "checksum" property specifications. |
1444 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1445 |
|
1446 |
|
1447 |
=head4 Load source node by ident |
1448 |
|
1449 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1450 |
info: Data::Transfer::Sync->_prepareNode_DummyIdent( descent source ) |
1451 |
pcritical: Data::Transfer::Sync->_modifyNode failed: "source" node is empty. |
1452 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1453 |
The source node could not be loaded. Maybe the ident is missing. Please check manually. |
1454 |
Hint: Like above, the ident and/or checksum columns may be missing.... |
1455 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
1456 |
|
1457 |
|
1458 |
=head1 TODO |
1459 |
|
1460 |
- sub _resolveIdentProvider |
1461 |
- wrap _doModifySource and _doTransferTarget around a core function which can change virtually any type of node |
1462 |
- split this module up into Sync.pm, Sync/Core.pm, Sync/Compare.pm and Sync/Compare/Checksum.pm |
1463 |
- introduce _compareNodes as a core method and wrap it around methods in Sync/Compare/Checksum.pm |
1464 |
- introduce Sync/Compare/MyComparisonImplementation.pm |
1465 |
- some generic deferring method - e.g. "$self->defer(action)" - to be able to accumulate a bunch of actions for later processing |
1466 |
- this implies everything done is _really_ split up into generic actions - how else would we defer them??? |
1467 |
- example uses: |
1468 |
- fetch whole checksum list from node |
1469 |
- remember source ident retransmits |
1470 |
- remember: this is convenient - and maybe / of course faster - but we'll loose "per-node-atomic" operations |
1471 |
- feature: mechanism to implicit inject checksum property to nodes (alter table / modify schema) |
1472 |
- expand statistics / keep track of: |
1473 |
- touched/untouched nodes |
1474 |
- full sync |
1475 |
- just do a push and a pull for now but use stats for touched nodes in between to speed up things |
1476 |
- introduce some new metadata flags for a synchronization partner which is (e.g.) of "source" or "target": |
1477 |
- isNewNodePropagator |
1478 |
- isWriteProtected |
1479 |
|
1480 |
|
1481 |
=cut |
1482 |
|
1483 |
1; |