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## $Id: Sync.pm,v 1.11 2002/12/23 07:10:59 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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## ---------------------------------------------------------------------------------------- |
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|
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|
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package Data::Transfer::Sync::API; |
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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 mixin::with qw( Data::Transfer::Sync ); |
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|
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|
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# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - main |
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|
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use Data::Dumper; |
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|
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use Data::Compare::Struct qw( getDifference isEmpty ); |
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use Data::Transform::Deep qw( merge ); |
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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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sub _init { |
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my $self = shift; |
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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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sub checkOptionsV2 { |
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my $self = shift; |
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|
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#print Dumper($self->{options}); |
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|
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my $result = 1; |
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|
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# check - do we have a target node? |
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if (!$self->{options}->{target}->{nodeName}) { |
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$logger->warning( __PACKAGE__ . "->checkOptionsV2: No target given - please check metadata declaration."); |
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$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 (!$self->{options}->{fieldmap}) { |
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$logger->warning( __PACKAGE__ . "->checkOptionsV2: Error while resolving resource metadata - no 'fieldmap' could be determined."); |
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$result = 0; |
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} |
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|
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# TODO: extend! |
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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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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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#exit; |
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|
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$opts->{mode} ||= ''; |
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$opts->{erase} ||= 0; |
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$opts->{prepare} ||= 0; |
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#$opts->{import} ||= 0; |
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|
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if (!$opts->{source_node}) { |
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$logger->error( __PACKAGE__ . "->prepareOptions failed: Please specify source-node!"); |
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return; |
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} |
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|
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$logger->notice( __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} || !$opts->{mapping_module}) { |
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if (!$opts->{mapping}) { |
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$logger->warning( __PACKAGE__ . "->prepareOptions: No mapping supplied - please check key 'mappings' in global configuration or specify additional argument '--mapping'."); |
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#return; |
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} |
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|
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$opts->{mapping_module} ||= $opts->{mapping}; |
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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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#print Dumper($map); |
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|
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# check here if "target" is actually a CODEref - in this case: resolve it - deprecated!!! ??? |
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if (ref $map->{target} eq 'CODE') { |
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$map->{target} = $map->{target}->($source_node_name); |
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} |
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|
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# resolve expressions (on nodename-level) here |
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if ($map->{target} =~ m/^(code|expr):(.+?)$/) { |
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my $target_dynamic_type = $1; |
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my $target_dynamic_expression = $2; |
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if (lc $target_dynamic_type eq 'code') { |
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# $map->{target} = $mapObject->$target_dynamic_expression($map); |
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} |
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} |
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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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sub prepareOptionsV2 { |
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|
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my $self = shift; |
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my $opts = shift; |
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|
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# patch options |
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$opts->{process}->{mode} ||= ''; |
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$opts->{process}->{prepare} ||= 0; |
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$opts->{process}->{erase} ||= 0; |
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|
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# pre-check options |
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if (!$self->_preCheckOptions($opts)) { |
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$logger->error( __PACKAGE__ . "->prepareOptionsV2: _preCheckOptions failed."); |
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return; |
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} |
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|
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# inform user about option preparation |
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$logger->notice( __PACKAGE__ . "->prepareOptionsV2( mode='$opts->{process}->{mode}', source->node='$opts->{source}->{nodeName}', target->node='$opts->{target}->{nodeName}', erase='$opts->{process}->{erase}', prepare='$opts->{process}->{prepare}' )"); |
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|
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# try to load mapping-metadata-container |
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#my $mapObject = getNewPerlObjectByPkgName($opts->{map}->{moduleName}); |
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my $mapObject = DesignPattern::Object->fromPackage($opts->{map}->{moduleName}); |
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|
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# try to resolve map from metadata-container |
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|
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# type of the item/node |
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my $source_nodeType = $opts->{source}->{nodeType}; |
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|
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# check if mapping for certain node is contained in mapping object |
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if (!$mapObject->can($source_nodeType)) { |
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$logger->warning( __PACKAGE__ . "->prepareOptionsV2: Can't access mapping for source-type=\"$source_nodeType\" - please check \"$opts->{map}->{moduleName}\"."); |
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return; |
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} |
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|
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|
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# get map |
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my $map = $mapObject->$source_nodeType; |
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#print Dumper($map); |
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|
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=pod |
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# check here if "target" is actually a CODEref - in this case: resolve it - deprecated!!! ??? |
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if (ref $map->{target}->{address} eq 'CODE') { |
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$map->{target}->{address} = $map->{target}->{address}->($source_nodeType); |
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} |
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|
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# resolve expressions (on nodename-level) here |
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if ($map->{target}->{address} =~ m/^(code|expr):(.+?)$/) { |
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my $target_dynamic_type = $1; |
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my $target_dynamic_expression = $2; |
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if (lc $target_dynamic_type eq 'code') { |
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$map->{target} = $mapObject->$target_dynamic_expression($map); |
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} |
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} |
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=cut |
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|
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#map { $opts->{$_} = $map->{$_}; } keys %$map; |
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my $opts_merged = merge( $opts, $map ); |
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|
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$self->{options} = $opts_merged; |
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$self->{state}->{options_ready} = 1; |
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|
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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 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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$self->_init(); |
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$self->_initV1(); |
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} else { |
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#print "no args!", "\n"; |
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} |
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#print Dumper($self); |
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$self->{state}->{configured} = 1; |
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return 1; |
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} |
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|
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sub configureV2 { |
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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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$self->{options} = merge($self->{options}, \%properties); |
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$self->_init(); |
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#$self->_initV1(); |
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} else { |
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#print "no args!", "\n"; |
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} |
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|
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#print Dumper($self); |
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|
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$self->{state}->{configured} = 1; |
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return 1; |
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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->{state}->{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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print Dumper($self); |
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#exit; |
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|
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if (!$self->{metadata}->{version} || $self->{metadata}->{version} < 0.2) { |
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$self->_buildMetadataV1(); |
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} else { |
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$self->_buildMetadataV1(); |
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#$self->_buildMetadataV2(); |
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} |
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#print Dumper($self); |
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#print Dumper($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}/$self->{meta}->{target}->{node}" ); |
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|
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$self->_buildFieldmappingV1(); |
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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? |
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foreach my $partner (keys %{$self->{meta}}) { |
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|
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# 1. check partners & storages |
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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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#print Dumper($self->{meta}); |
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|
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if (!$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: |
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# 2. check if partners (and nodes?) are actually available.... |
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# eventually pre-check mode of access-attempt (read/write) here to provide an "early-croak" if possible |
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|
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# print Dumper($self->{meta}->{$partner}->{storage}->{locator}); |
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|
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my $dbType = $self->{meta}->{$partner}->{storage}->{locator}->{type}; |
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#print "dbType: $dbType", "\n"; |
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|
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# 3. check nodes |
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next if $dbType eq 'DBI'; # HACK for DBD::CSV - re-enable for others |
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# get node-name |
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# print Dumper($self); |
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#print Dumper($self->{meta}->{$partner}); |
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#print "ΓΆΓΆ", $self->{meta}->{$partner}->{node}, "\n"; |
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my $nodename = $self->{meta}->{$partner}->{node}; |
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# check if nodename is actually a CODEref, execute it to get a mapped/filtered target-nodename |
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|
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#print "nodename: $nodename", "\n"; |
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|
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$logger->info( __PACKAGE__ . "->syncNodes: Accessing dbType=\"$dbType\", nodename=\"$nodename\"." ); |
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|
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=pod |
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#print "----", ref $nodename, "\n"; |
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if ($nodename =~ m/CODE/) { |
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print Dumper($self); |
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#exit; |
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$nodename = $nodename->($nodename); |
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} |
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=cut |
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|
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if (!$self->{meta}->{$partner}->{storage}->existsChildNode($nodename)) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Could not reach node \"$nodename\" at partner \"$partner\"." ); |
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return; |
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} |
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|
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} |
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|
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# TODO: |
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# + if action == PUSH: start processing |
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# -+ 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 |
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if (lc $self->{args}->{direction} eq 'push') { |
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# just do it ... |
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} elsif (lc $self->{args}->{direction} eq 'pull') { |
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#print "=======SWAP", "\n"; |
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# swap |
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($self->{meta}->{source}, $self->{meta}->{target}) = |
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($self->{meta}->{target}, $self->{meta}->{source}); |
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} elsif (lc $self->{args}->{direction} eq 'full') { |
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} else { |
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} |
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|
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# import flag means: prepare the source node to be syncable |
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# this is useful if there are e.g. no "ident" or "checksum" columns yet inside a DBI like (row-based) storage |
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if ($self->{args}->{prepare}) { |
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$self->_prepareNode_MetaProperties('source'); |
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$self->_prepareNode_DummyIdent('source'); |
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#return; |
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#$self->_erase_all($opts->{source_node}); |
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} |
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|
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# erase flag means: erase the target |
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#if ($opts->{erase}) { |
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if ($self->{args}->{erase}) { |
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# TODO: move this method to the scope of the synchronization core and wrap it around different handlers |
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#print "ERASE", "\n"; |
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$self->_erase_all('target'); |
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} |
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|
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$self->_syncNodes(); |
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|
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} |
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|
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1; |
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