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## $Id: Sync.pm,v 1.1 2002/11/29 04:45:50 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 1.1 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 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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|
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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->_init(); |
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return $self; |
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} |
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|
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|
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sub _init { |
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my $self = shift; |
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|
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# build new container if necessary |
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$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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# 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 $args = shift; |
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|
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# remember arguments through the whole processing |
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$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: 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}->{$_}->{storage}), "\n"; |
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} |
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|
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$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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# check partners/nodes: does partner exist / is node available? |
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foreach my $partner (keys %{$self->{meta}}) { |
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next if $self->{meta}->{$partner}->{storage}->{locator}->{type} eq 'DBI'; # for DBD::CSV - re-enable for others |
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my $node = $self->{meta}->{$partner}->{node}; |
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if (!$self->{meta}->{$partner}->{storage}->existsChildNode($node)) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Could not reach \"$node\" at \"$partner\"." ); |
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return; |
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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}->{import}) { |
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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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|
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# TODO: abstract the hardwired use of "source" and "target" in here somehow - hmmmm....... /(="§/%??? |
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sub _syncNodes { |
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|
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my $self = shift; |
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|
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my $tc = OneLineDumpHash->new( {} ); |
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my $results; |
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|
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# set of objects is already in $self->{args} |
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# TODO: make independent of the terminology "object..." |
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$results = $self->{args}->{objectSet} if $self->{args}->{objectSet}; |
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|
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# apply filter |
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if (my $filter = $self->{meta}->{source}->{filter}) { |
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#print Dumper($filter); |
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#exit; |
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$results ||= $self->_getNodeList('source', $filter); |
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} |
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|
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# get reference to node list from convenient method provided by corehandle |
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#$results ||= $self->{source}->getListUnfiltered($self->{meta}->{source}->{node}); |
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#$results ||= $self->{meta}->{source}->{storage}->getListUnfiltered($self->{meta}->{source}->{node}); |
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$results ||= $self->_getNodeList('source'); |
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|
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# checkpoint: do we actually have a list to iterate through? |
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if (!$results || !@{$results}) { |
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$logger->notice( __PACKAGE__ . "->syncNodes: No nodes to synchronize." ); |
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return; |
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} |
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|
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# dereference |
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my @results = @{$results}; |
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|
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# iterate through set |
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foreach my $source_node_real (@results) { |
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|
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$tc->{total}++; |
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|
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#print "======================== iter", "\n"; |
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|
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# clone object (in case we have to modify it here) |
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# TODO: |
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# - is a "deep_copy" needed here if occouring modifications take place? |
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# - puuhhhh, i guess a deep_copy would destroy tangram mechanisms? |
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# - after all, just take care for now that this object doesn't get updated! |
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my $source_node = $source_node_real; |
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|
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# modify entry - handle new style callbacks (the readers) |
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#print Dumper($source_node); |
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#exit; |
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|
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my $descent = 'source'; |
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|
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# handle callbacks right now while scanning them (asymmetric to the writers) |
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my $map_callbacks = {}; |
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if (my $callbacks = $self->{meta}->{$descent}->{Callback}) { |
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|
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my $error = 0; |
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|
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foreach my $node (keys %{$callbacks->{read}}) { |
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|
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my $object = $source_node; |
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my $value; # = $source_node->{$node}; |
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|
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# ------------ half-redundant: make $self->callCallback($object, $value, $opts) |
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my $perl_callback = $self->{meta}->{$descent}->{node} . '::' . $node . '_read'; |
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my $evalstring = 'return ' . $perl_callback . '( { object => $object, property => $node, value => $value, storage => $self->{meta}->{$descent}->{storage} } );'; |
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#print $evalstring, "\n"; exit; |
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my $cb_result = eval($evalstring); |
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if ($@) { |
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die $@; |
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$error = 1; |
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print $@, "\n"; |
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} |
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# ------------ half-redundant: make $self->callCallback($object, $value, $opts) |
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|
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$source_node->{$node} = $cb_result; |
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|
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} |
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|
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} |
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|
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#print Dumper($source_node); |
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|
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# exclude defined fields (simply delete from object) |
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map { delete $source_node->{$_} } @{$self->{meta}->{source}->{subnodes_exclude}}; |
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|
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# here we accumulate information about the status of the current node (payload/row/object/item/entry) |
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$self->{node} = {}; |
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$self->{node}->{source}->{payload} = $source_node; |
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|
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#print "res - ident", "\n"; |
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|
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# determine ident of entry |
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my $identOK = $self->_resolveNodeIdent('source'); |
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#if (!$identOK && lc $self->{args}->{direction} ne 'import') { |
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if (!$identOK) { |
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$logger->critical( __PACKAGE__ . "->syncNodes: Can not synchronize: No ident found in source node, maybe try to \"import\" this node first." ); |
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return; |
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} |
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|
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#print "statload", "\n"; |
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#print "ident: ", $self->{node}->{source}->{ident}, "\n"; |
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|
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my $statOK = $self->_statloadNode('target', $self->{node}->{source}->{ident}); |
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|
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# mark node as new either if there's no ident or if stat/load failed |
| 332 |
if (!$statOK) { |
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$self->{node}->{status}->{new} = 1; |
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print "n" if $self->{verbose}; |
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} |
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|
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#print "checksum", "\n"; |
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|
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# determine status of entry by synchronization method |
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if ( (lc $self->{args}->{method} eq 'checksum') ) { |
| 341 |
#if ( $statOK && (lc $self->{args}->{method} eq 'checksum') ) { |
| 342 |
#if ( !$self->{node}->{status}->{new} && (lc $self->{args}->{method} eq 'checksum') ) { |
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|
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# TODO: |
| 345 |
# is this really worth a "critical"??? |
| 346 |
# no - it should just be a debug appendix i believe |
| 347 |
|
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#print "readcs", "\n"; |
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|
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# calculate checksum of source node |
| 351 |
#$self->_calcChecksum('source'); |
| 352 |
if (!$self->_readChecksum('source')) { |
| 353 |
$logger->critical( __PACKAGE__ . "->_readChecksum: Could not find \"source\" entry with ident=\"$self->{node}->{source}->{ident}\"" ); |
| 354 |
$tc->{skip}++; |
| 355 |
print "s" if $self->{verbose}; |
| 356 |
next; |
| 357 |
} |
| 358 |
|
| 359 |
# get checksum from synchronization target |
| 360 |
$self->_readChecksum('target'); |
| 361 |
#if (!$self->_readChecksum('target')) { |
| 362 |
# $logger->critical( __PACKAGE__ . "->_readChecksum: Could not find \"target\" entry with ident=\"$self->{node}->{source}->{ident}\"" ); |
| 363 |
# next; |
| 364 |
#} |
| 365 |
|
| 366 |
# pre flight check: do we actually have a checksum provided? |
| 367 |
#if (!$self->{node}->{source}->{checksum}) { |
| 368 |
# print "Source checksum for entry with ident \"$self->{node}->{source}->{ident}\" could not be calculated, maybe it's missing?.", "\n"; |
| 369 |
# return; |
| 370 |
#} |
| 371 |
|
| 372 |
# determine if entry is "new" or "dirty" |
| 373 |
# after all, this seems to be the point where the hammer falls..... |
| 374 |
print "c" if $self->{verbose}; |
| 375 |
$self->{node}->{status}->{new} = !$self->{node}->{target}->{checksum}; |
| 376 |
if (!$self->{node}->{status}->{new}) { |
| 377 |
$self->{node}->{status}->{dirty} = |
| 378 |
$self->{node}->{status}->{new} || |
| 379 |
(!$self->{node}->{source}->{checksum} || !$self->{node}->{target}->{checksum}) || |
| 380 |
($self->{node}->{source}->{checksum} ne $self->{node}->{target}->{checksum}) || |
| 381 |
$self->{args}->{force}; |
| 382 |
} |
| 383 |
|
| 384 |
} |
| 385 |
|
| 386 |
# first reaction on entry-status: continue with next entry if the current is already "in sync" |
| 387 |
if (!$self->{node}->{status}->{new} && !$self->{node}->{status}->{dirty}) { |
| 388 |
$tc->{in_sync}++; |
| 389 |
next; |
| 390 |
} |
| 391 |
|
| 392 |
# build map to actually transfer the data from source to target |
| 393 |
$self->_buildMap(); |
| 394 |
|
| 395 |
|
| 396 |
#print Dumper($self->{node}); exit; |
| 397 |
|
| 398 |
#print "attempt", "\n"; |
| 399 |
|
| 400 |
# additional (new) checks for feature "write-protection" |
| 401 |
if ($self->{meta}->{target}->{storage}->{isWriteProtected}) { |
| 402 |
$tc->{attempt_transfer}++; |
| 403 |
print "\n" if $self->{verbose}; |
| 404 |
$logger->notice( __PACKAGE__ . "->syncNodes: Target is write-protected. Will not insert or modify node. " . |
| 405 |
"(Ident: $self->{node}->{source}->{ident} " . "Dump:\n" . Dumper($self->{node}->{source}->{payload}) . ")" ); |
| 406 |
print "\n" if $self->{verbose}; |
| 407 |
$tc->{skip}++; |
| 408 |
next; |
| 409 |
} |
| 410 |
|
| 411 |
# transfer contents of map to target |
| 412 |
if ($self->{node}->{status}->{new}) { |
| 413 |
$tc->{attempt_new}++; |
| 414 |
$self->_doTransferToTarget('insert'); |
| 415 |
# asymmetry: refetch node from target to re-calculate new ident and checksum (TODO: is IdentAuthority of relevance here?) |
| 416 |
$self->_statloadNode('target', $self->{node}->{target}->{ident}, 1); |
| 417 |
$self->_readChecksum('target'); |
| 418 |
|
| 419 |
} elsif ($self->{node}->{status}->{dirty}) { |
| 420 |
$tc->{attempt_modify}++; |
| 421 |
# asymmetry: get ident before updating (TODO: is IdentAuthority of relevance here?) |
| 422 |
$self->{node}->{target}->{ident} = $self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}}; |
| 423 |
$self->_doTransferToTarget('update'); |
| 424 |
$self->_readChecksum('target'); |
| 425 |
} |
| 426 |
|
| 427 |
if ($self->{node}->{status}->{ok}) { |
| 428 |
$tc->{ok}++; |
| 429 |
print "t" if $self->{verbose}; |
| 430 |
} |
| 431 |
|
| 432 |
if ($self->{node}->{status}->{error}) { |
| 433 |
$tc->{error}++; |
| 434 |
push( @{$tc->{error_per_row}}, $self->{node}->{status}->{error} ); |
| 435 |
print "e" if $self->{verbose}; |
| 436 |
} |
| 437 |
|
| 438 |
# change ident in source (take from target), if transfer was ok and target is an IdentAuthority |
| 439 |
# this is (for now) called a "retransmit" indicated by a "r"-character when verbosing |
| 440 |
if ($self->{node}->{status}->{ok} && $self->{meta}->{target}->{storage}->{isIdentAuthority}) { |
| 441 |
#print Dumper($self->{meta}); |
| 442 |
#print Dumper($self->{node}); |
| 443 |
#exit; |
| 444 |
$self->_doModifySource_IdentChecksum($self->{node}->{target}->{ident}); |
| 445 |
print "r" if $self->{verbose}; |
| 446 |
} |
| 447 |
|
| 448 |
print ":" if $self->{verbose}; |
| 449 |
|
| 450 |
} |
| 451 |
|
| 452 |
print "\n" if $self->{verbose}; |
| 453 |
|
| 454 |
# build user-message from some stats |
| 455 |
my $msg = "stats: $tc"; |
| 456 |
|
| 457 |
if ($tc->{error_per_row}) { |
| 458 |
$msg .= "\n"; |
| 459 |
$msg .= "errors from \"error_per_row\":" . "\n"; |
| 460 |
$msg .= Dumper($tc->{error_per_row}); |
| 461 |
} |
| 462 |
|
| 463 |
# todo!!! |
| 464 |
#sysevent( { usermsg => $msg, level => $level }, $taskEvent ); |
| 465 |
$logger->info( __PACKAGE__ . "->syncNodes: $msg" ); |
| 466 |
|
| 467 |
return $tc; |
| 468 |
|
| 469 |
} |
| 470 |
|
| 471 |
|
| 472 |
sub _dumpCompact { |
| 473 |
my $self = shift; |
| 474 |
|
| 475 |
#my $vars = \@_; |
| 476 |
my @data = (); |
| 477 |
|
| 478 |
my $count = 0; |
| 479 |
foreach (@_) { |
| 480 |
my $item = {}; |
| 481 |
foreach my $key (keys %$_) { |
| 482 |
my $val = $_->{$key}; |
| 483 |
if (ref $val eq 'Set::Object') { |
| 484 |
#print "========================= SET", "\n"; |
| 485 |
#print Dumper($val); |
| 486 |
#print Dumper($val->members()); |
| 487 |
#$val = $val->members(); |
| 488 |
#$vars->[$count]->{$key} = $val->members() if $val->can("members"); |
| 489 |
#$item->{$key} = $val->members() if $val->can("members"); |
| 490 |
$item->{$key} = $val->members(); |
| 491 |
#print Dumper($vars->[$count]->{$key}); |
| 492 |
} else { |
| 493 |
$item->{$key} = $val; |
| 494 |
} |
| 495 |
} |
| 496 |
push @data, $item; |
| 497 |
$count++; |
| 498 |
} |
| 499 |
|
| 500 |
#print "Dump:", "\n"; |
| 501 |
#print Dumper(@data); |
| 502 |
|
| 503 |
$Data::Dumper::Indent = 0; |
| 504 |
my $result = Dumper(@data); |
| 505 |
$Data::Dumper::Indent = 2; |
| 506 |
return $result; |
| 507 |
} |
| 508 |
|
| 509 |
|
| 510 |
sub _calcChecksum { |
| 511 |
|
| 512 |
my $self = shift; |
| 513 |
my $descent = shift; |
| 514 |
my $specifier = shift; |
| 515 |
|
| 516 |
# calculate checksum for current object |
| 517 |
my $ident = $self->{node}->{$descent}->{ident}; |
| 518 |
|
| 519 |
# build dump of this node |
| 520 |
my $payload = $self->{node}->{$descent}->{payload}; |
| 521 |
#my $dump = $ident . "\n" . $item->quickdump(); |
| 522 |
#my $dump = $ident . "\n" . Dumper($item); |
| 523 |
my $dump = $ident . "\n" . $self->_dumpCompact($payload); |
| 524 |
|
| 525 |
# TODO: $logger->dump( ... ); |
| 526 |
#$logger->debug( __PACKAGE__ . ": " . $dump ); |
| 527 |
#$logger->dump( __PACKAGE__ . ": " . $dump ); |
| 528 |
|
| 529 |
# calculate checksum from dump |
| 530 |
# md5-based fingerprint, base64 encoded (from Digest::MD5) |
| 531 |
#my $checksum_cur = md5_base64($objdump) . '=='; |
| 532 |
# 32-bit integer "hash" value (maybe faster?) (from DBI) |
| 533 |
$self->{node}->{$descent}->{checksum} = DBI::hash($dump, 1); |
| 534 |
|
| 535 |
# signal good |
| 536 |
return 1; |
| 537 |
|
| 538 |
} |
| 539 |
|
| 540 |
|
| 541 |
sub _readChecksum { |
| 542 |
my $self = shift; |
| 543 |
|
| 544 |
my $descent = shift; |
| 545 |
|
| 546 |
#print "getcheck:", "\n"; print Dumper($self->{node}->{$descent}); |
| 547 |
|
| 548 |
if (!$self->{node}->{$descent}) { |
| 549 |
# signal checksum bad |
| 550 |
return; |
| 551 |
} |
| 552 |
|
| 553 |
# get checksum for current entry |
| 554 |
# TODO: don't have the checksum column/property hardcoded as "cs" here, make this configurable somehow |
| 555 |
|
| 556 |
if ($self->{meta}->{$descent}->{storage}->{isChecksumAuthority}) { |
| 557 |
#$self->{node}->{$descent}->{checksum} = $entry->{cs}; |
| 558 |
#$self->{node}->{$descent}->{checksum} = $self->_calcChecksum($descent); # $entry->{cs}; |
| 559 |
#print "descent: $descent", "\n"; |
| 560 |
$self->_calcChecksum($descent); |
| 561 |
#print "checksum: ", $self->{node}->{$descent}->{checksum}, "\n"; |
| 562 |
} else { |
| 563 |
|
| 564 |
#$self->{node}->{$descent}->{checksum} = $entry->{cs}; |
| 565 |
$self->{node}->{$descent}->{checksum} = $self->{node}->{$descent}->{payload}->{cs}; |
| 566 |
} |
| 567 |
|
| 568 |
# signal checksum good |
| 569 |
return 1; |
| 570 |
|
| 571 |
} |
| 572 |
|
| 573 |
|
| 574 |
sub _buildMap { |
| 575 |
|
| 576 |
my $self = shift; |
| 577 |
|
| 578 |
# field-structure for building sql |
| 579 |
# mapping of sql-fieldnames to object-attributes |
| 580 |
$self->{node}->{map} = {}; |
| 581 |
|
| 582 |
# manually set ... |
| 583 |
# ... object-id |
| 584 |
$self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}} = $self->{node}->{source}->{ident}; |
| 585 |
# ... checksum |
| 586 |
$self->{node}->{map}->{cs} = $self->{node}->{source}->{checksum}; |
| 587 |
|
| 588 |
#print "sqlmap: ", Dumper($self->{node}->{map}), "\n"; |
| 589 |
|
| 590 |
# for transferring flat structures via simple (1:1) mapping |
| 591 |
# TODO: diff per property / property value |
| 592 |
|
| 593 |
if ($self->{args}->{mapping}) { |
| 594 |
# apply mapping from $self->{args}->{mapping} to $self->{node}->{map} |
| 595 |
#foreach my $key (@{$self->{meta}->{source}->{childnodes}}) { |
| 596 |
my @childnodes = @{$self->{meta}->{source}->{childnodes}}; |
| 597 |
for (my $mapidx = 0; $mapidx <= $#childnodes; $mapidx++) { |
| 598 |
#my $map_right = $self->{args}->{mapping}->{$key}; |
| 599 |
|
| 600 |
$self->{node}->{source}->{propcache} = {}; |
| 601 |
$self->{node}->{target}->{propcache} = {}; |
| 602 |
|
| 603 |
# get property name |
| 604 |
$self->{node}->{source}->{propcache}->{property} = $self->{meta}->{source}->{childnodes}->[$mapidx]; |
| 605 |
$self->{node}->{target}->{propcache}->{property} = $self->{meta}->{target}->{childnodes}->[$mapidx]; |
| 606 |
#print "map: $map_right", "\n"; |
| 607 |
|
| 608 |
# get property value |
| 609 |
my $value; |
| 610 |
|
| 611 |
# detect for callback - old style - (maybe the better???) |
| 612 |
if (ref($self->{node}->{target}->{map}) eq 'CODE') { |
| 613 |
#$value = &$map_right($objClone); |
| 614 |
} else { |
| 615 |
# plain (scalar?) value |
| 616 |
#$value = $objClone->{$map_right}; |
| 617 |
$self->{node}->{source}->{propcache}->{value} = $self->{node}->{source}->{payload}->{$self->{node}->{source}->{propcache}->{property}}; |
| 618 |
} |
| 619 |
#$self->{node}->{map}->{$key} = $value; |
| 620 |
|
| 621 |
# detect expression |
| 622 |
# for transferring deeply nested structures described by expressions |
| 623 |
#print "val: $self->{node}->{source}->{propcache}->{value}", "\n"; |
| 624 |
if ($self->{node}->{source}->{propcache}->{property} =~ s/^expr://) { |
| 625 |
|
| 626 |
# create an anonymous sub to act as callback target dispatcher |
| 627 |
my $cb_dispatcher = sub { |
| 628 |
#print "=============== CALLBACK DISPATCHER", "\n"; |
| 629 |
#print "ident: ", $self->{node}->{source}->{ident}, "\n"; |
| 630 |
#return $self->{node}->{source}->{ident}; |
| 631 |
|
| 632 |
}; |
| 633 |
|
| 634 |
|
| 635 |
#print Dumper($self->{node}); |
| 636 |
|
| 637 |
# build callback map for helper function |
| 638 |
#my $cbmap = { $self->{meta}->{source}->{IdentProvider}->{arg} => $cb_dispatcher }; |
| 639 |
my $cbmap = {}; |
| 640 |
my $value = refexpr2perlref($self->{node}->{source}->{payload}, $self->{node}->{source}->{propcache}->{property}, $cbmap); |
| 641 |
$self->{node}->{source}->{propcache}->{value} = $value; |
| 642 |
} |
| 643 |
|
| 644 |
# encode values dependent on type of underlying storage here - expand cases... |
| 645 |
my $storage_type = $self->{meta}->{target}->{storage}->{locator}->{type}; |
| 646 |
if ($storage_type eq 'DBI') { |
| 647 |
# ...for sql |
| 648 |
$self->{node}->{source}->{propcache}->{value} = quotesql($self->{node}->{source}->{propcache}->{value}); |
| 649 |
} |
| 650 |
elsif ($storage_type eq 'Tangram') { |
| 651 |
# iso? utf8 already possible? |
| 652 |
|
| 653 |
} elsif ($storage_type eq 'LDAP') { |
| 654 |
# TODO: encode utf8 here? |
| 655 |
} |
| 656 |
|
| 657 |
# store value to transfer map |
| 658 |
$self->{node}->{map}->{$self->{node}->{target}->{propcache}->{property}} = $self->{node}->{source}->{propcache}->{value}; |
| 659 |
|
| 660 |
} |
| 661 |
} |
| 662 |
|
| 663 |
|
| 664 |
# TODO: $logger->dump( ... ); |
| 665 |
#$logger->debug( "sqlmap:" . "\n" . Dumper($self->{node}->{map}) ); |
| 666 |
#print "sqlmap: ", Dumper($self->{node}->{map}), "\n"; |
| 667 |
#print "entrystatus: ", Dumper($self->{node}), "\n"; |
| 668 |
|
| 669 |
} |
| 670 |
|
| 671 |
sub _resolveNodeIdent { |
| 672 |
my $self = shift; |
| 673 |
my $descent = shift; |
| 674 |
|
| 675 |
#print Dumper($self->{node}->{$descent}); |
| 676 |
|
| 677 |
# get to the payload |
| 678 |
#my $item = $specifier->{item}; |
| 679 |
my $payload = $self->{node}->{$descent}->{payload}; |
| 680 |
|
| 681 |
# resolve method to get to the id of the given item |
| 682 |
# we use global metadata and the given descent for this task |
| 683 |
#my $ident = $self->{$descent}->id($item); |
| 684 |
#my $ident = $self->{meta}->{$descent}->{storage}->id($item); |
| 685 |
|
| 686 |
my $ident; |
| 687 |
my $provider_method = $self->{meta}->{$descent}->{IdentProvider}->{method}; |
| 688 |
my $provider_arg = $self->{meta}->{$descent}->{IdentProvider}->{arg}; |
| 689 |
|
| 690 |
# resolve to ident |
| 691 |
if ($provider_method eq 'property') { |
| 692 |
$ident = $payload->{$provider_arg}; |
| 693 |
|
| 694 |
} elsif ($provider_method eq 'storage_method') { |
| 695 |
#$ident = $self->{meta}->{$descent}->{storage}->id($item); |
| 696 |
$ident = $self->{meta}->{$descent}->{storage}->$provider_arg($payload); |
| 697 |
} |
| 698 |
|
| 699 |
$self->{node}->{$descent}->{ident} = $ident; |
| 700 |
|
| 701 |
return 1 if $ident; |
| 702 |
|
| 703 |
} |
| 704 |
|
| 705 |
|
| 706 |
sub _modifyNode { |
| 707 |
my $self = shift; |
| 708 |
my $descent = shift; |
| 709 |
my $action = shift; |
| 710 |
my $map = shift; |
| 711 |
my $crit = shift; |
| 712 |
|
| 713 |
# map for new style callbacks |
| 714 |
my $map_callbacks = {}; |
| 715 |
|
| 716 |
# checks go first! |
| 717 |
|
| 718 |
# TODO: this should be reviewed first - before extending ;-) |
| 719 |
# TODO: this should be extended: |
| 720 |
# count this cases inside the caller to this sub and provide a better overall message |
| 721 |
# if this counts still zero in the end: |
| 722 |
# "No nodes have been touched for modify: Do you have column-headers in your csv file?" |
| 723 |
if (not defined $self->{node}) { |
| 724 |
#$logger->critical( __PACKAGE__ . "->_modifyNode failed: \"$descent\" node is empty." ); |
| 725 |
#return; |
| 726 |
} |
| 727 |
|
| 728 |
# transfer callback nodes from value map to callback map - handle them afterwards! - (new style callbacks) |
| 729 |
if (my $callbacks = $self->{meta}->{$descent}->{Callback}) { |
| 730 |
foreach my $callback (keys %{$callbacks->{write}}) { |
| 731 |
$map_callbacks->{write}->{$callback} = $map->{$callback}; |
| 732 |
delete $map->{$callback}; |
| 733 |
} |
| 734 |
} |
| 735 |
|
| 736 |
|
| 737 |
# DBI speaks SQL |
| 738 |
if ($self->{meta}->{$descent}->{storage}->{locator}->{type} eq 'DBI') { |
| 739 |
|
| 740 |
#print Dumper($self->{node}); |
| 741 |
my $sql_main; |
| 742 |
# translate map to sql |
| 743 |
#print $action, "\n"; exit; |
| 744 |
#print $self->{meta}->{$descent}->{node}, "\n"; exit; |
| 745 |
#print "action:"; |
| 746 |
#print $action, "\n"; |
| 747 |
#$action = "anc"; |
| 748 |
#print "yai", "\n"; |
| 749 |
if (lc($action) eq 'insert') { |
| 750 |
$sql_main = hash2Sql($self->{meta}->{$descent}->{node}, $map, 'SQL_INSERT'); |
| 751 |
} elsif (lc $action eq 'update') { |
| 752 |
$crit ||= "$self->{meta}->{$descent}->{IdentProvider}->{arg}='$self->{node}->{$descent}->{ident}'"; |
| 753 |
$sql_main = hash2Sql($self->{meta}->{$descent}->{node}, $map, 'SQL_UPDATE', $crit); |
| 754 |
} |
| 755 |
|
| 756 |
#print "sql: ", $sql_main, "\n"; |
| 757 |
#exit; |
| 758 |
|
| 759 |
# transfer data |
| 760 |
my $sqlHandle = $self->{meta}->{$descent}->{storage}->sendCommand($sql_main); |
| 761 |
|
| 762 |
# handle errors |
| 763 |
if ($sqlHandle->err) { |
| 764 |
#if ($self->{args}->{debug}) { print "sql-error with statement: $sql_main", "\n"; } |
| 765 |
$self->{node}->{status}->{error} = { |
| 766 |
statement => $sql_main, |
| 767 |
state => $sqlHandle->state, |
| 768 |
err => $sqlHandle->err, |
| 769 |
errstr => $sqlHandle->errstr, |
| 770 |
}; |
| 771 |
} else { |
| 772 |
$self->{node}->{status}->{ok} = 1; |
| 773 |
} |
| 774 |
|
| 775 |
# Tangram does it the oo-way (naturally) |
| 776 |
} elsif ($self->{meta}->{$descent}->{storage}->{locator}->{type} eq 'Tangram') { |
| 777 |
my $sql_main; |
| 778 |
my $object; |
| 779 |
|
| 780 |
# determine classname |
| 781 |
my $classname = $self->{meta}->{$descent}->{node}; |
| 782 |
|
| 783 |
# properties to exclude |
| 784 |
my @exclude = @{$self->{meta}->{$descent}->{subnodes_exclude}}; |
| 785 |
|
| 786 |
|
| 787 |
if (my $identProvider = $self->{meta}->{$descent}->{IdentProvider}) { |
| 788 |
push @exclude, $identProvider->{arg}; |
| 789 |
} |
| 790 |
|
| 791 |
# new feature: |
| 792 |
# - check TypeProvider metadata property from other side |
| 793 |
# - use argument (arg) inside as a classname for object creation on this side |
| 794 |
#my $otherSide = $self->_otherSide($descent); |
| 795 |
if (my $typeProvider = $self->{meta}->{$descent}->{TypeProvider}) { |
| 796 |
#print Dumper($map); |
| 797 |
$classname = $map->{$typeProvider->{arg}}; |
| 798 |
# remove nodes from map also (push nodes to "subnodes_exclude" list) |
| 799 |
push @exclude, $typeProvider->{arg}; |
| 800 |
} |
| 801 |
|
| 802 |
# exclude banned properties (remove from map) |
| 803 |
#map { delete $self->{node}->{map}->{$_} } @{$self->{args}->{exclude}}; |
| 804 |
map { delete $map->{$_} } @exclude; |
| 805 |
|
| 806 |
# list of properties |
| 807 |
my @props = keys %{$map}; |
| 808 |
|
| 809 |
# transfer data |
| 810 |
if (lc $action eq 'insert') { |
| 811 |
|
| 812 |
# build array to initialize object |
| 813 |
#my @initarray = (); |
| 814 |
#map { push @initarray, $_, undef; } @props; |
| 815 |
|
| 816 |
# make the object persistent in four steps: |
| 817 |
# - raw create (perl / class tangram scope) |
| 818 |
# - engine insert (tangram scope) ... this establishes inheritance - don't try to fill in inherited properties before! |
| 819 |
# - raw fill-in from hash (perl scope) |
| 820 |
# - engine update (tangram scope) ... this updates all properties just filled in |
| 821 |
|
| 822 |
# create new object ... |
| 823 |
#my $object = $classname->new( @initarray ); |
| 824 |
$object = $classname->new(); |
| 825 |
|
| 826 |
# ... pass to orm ... |
| 827 |
$self->{meta}->{$descent}->{storage}->insert($object); |
| 828 |
|
| 829 |
# ... and initialize with empty (undef'd) properties. |
| 830 |
#print Dumper(@props); |
| 831 |
map { $object->{$_} = undef; } @props; |
| 832 |
|
| 833 |
# mix in values ... |
| 834 |
hash2object($object, $map); |
| 835 |
|
| 836 |
# ... and re-update@orm. |
| 837 |
$self->{meta}->{$descent}->{storage}->update($object); |
| 838 |
|
| 839 |
# asymmetry: get ident after insert |
| 840 |
# TODO: |
| 841 |
# - just do this if it is an IdentAuthority |
| 842 |
# - use IdentProvider metadata here |
| 843 |
$self->{node}->{$descent}->{ident} = $self->{meta}->{$descent}->{storage}->id($object); |
| 844 |
|
| 845 |
|
| 846 |
} elsif (lc $action eq 'update') { |
| 847 |
|
| 848 |
# get fresh object from orm first |
| 849 |
$object = $self->{meta}->{$descent}->{storage}->load($self->{node}->{$descent}->{ident}); |
| 850 |
|
| 851 |
#print Dumper($self->{node}); |
| 852 |
|
| 853 |
# mix in values |
| 854 |
#print Dumper($object); |
| 855 |
hash2object($object, $map); |
| 856 |
#print Dumper($object); |
| 857 |
#exit; |
| 858 |
$self->{meta}->{$descent}->{storage}->update($object); |
| 859 |
} |
| 860 |
|
| 861 |
my $error = 0; |
| 862 |
|
| 863 |
# handle new style callbacks - this is a HACK - do this without an eval! |
| 864 |
#print Dumper($map); |
| 865 |
#print "cb: ", Dumper($self->{meta}->{$descent}->{Callback}); |
| 866 |
#print Dumper($map_callbacks); |
| 867 |
foreach my $node (keys %{$map_callbacks->{write}}) { |
| 868 |
#print Dumper($node); |
| 869 |
my $perl_callback = $self->{meta}->{$descent}->{node} . '::' . $node . '_write'; |
| 870 |
my $evalstring = $perl_callback . '( { object => $object, value => $map_callbacks->{write}->{$node}, storage => $self->{meta}->{$descent}->{storage} } );'; |
| 871 |
#print $evalstring, "\n"; exit; |
| 872 |
eval($evalstring); |
| 873 |
if ($@) { |
| 874 |
$error = 1; |
| 875 |
print $@, "\n"; |
| 876 |
} |
| 877 |
|
| 878 |
#print "after eval", "\n"; |
| 879 |
|
| 880 |
if (!$error) { |
| 881 |
# re-update@orm |
| 882 |
$self->{meta}->{$descent}->{storage}->update($object); |
| 883 |
} |
| 884 |
} |
| 885 |
|
| 886 |
# handle errors |
| 887 |
if ($error) { |
| 888 |
#print "error", "\n"; |
| 889 |
=pod |
| 890 |
my $sqlHandle; |
| 891 |
#if ($self->{args}->{debug}) { print "sql-error with statement: $sql_main", "\n"; } |
| 892 |
$self->{node}->{status}->{error} = { |
| 893 |
statement => $sql_main, |
| 894 |
state => $sqlHandle->state, |
| 895 |
err => $sqlHandle->err, |
| 896 |
errstr => $sqlHandle->errstr, |
| 897 |
}; |
| 898 |
=cut |
| 899 |
# rollback.... |
| 900 |
#print "rollback", "\n"; |
| 901 |
$self->{meta}->{$descent}->{storage}->erase($object); |
| 902 |
#print "after rollback", "\n"; |
| 903 |
} else { |
| 904 |
$self->{node}->{status}->{ok} = 1; |
| 905 |
} |
| 906 |
|
| 907 |
|
| 908 |
} |
| 909 |
|
| 910 |
} |
| 911 |
|
| 912 |
# TODO: |
| 913 |
# this should be split up into... |
| 914 |
# - a "_statNode" (should just touch the node to check for existance) |
| 915 |
# - a "_loadNode" (should load node completely) |
| 916 |
# - maybe additionally a "loadNodeProperty" (may specify properties to load) |
| 917 |
# - introduce $self->{nodecache} for this purpose |
| 918 |
# TODO: |
| 919 |
# should we: |
| 920 |
# - not pass ident in here but resolve it via "$descent"? |
| 921 |
# - refactor this and stuff it with additional debug/error message |
| 922 |
# - this = the way the implicit load mechanism works |
| 923 |
sub _statloadNode { |
| 924 |
|
| 925 |
my $self = shift; |
| 926 |
my $descent = shift; |
| 927 |
my $ident = shift; |
| 928 |
my $force = shift; |
| 929 |
|
| 930 |
# fetch entry to retrieve checksum from |
| 931 |
# was: |
| 932 |
if (!$self->{node}->{$descent} || $force) { |
| 933 |
# is: |
| 934 |
#if (!$self->{node}->{$descent}->{item} || $force) { |
| 935 |
|
| 936 |
if (!$ident) { |
| 937 |
#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"; |
| 938 |
return; |
| 939 |
} |
| 940 |
|
| 941 |
my $result = $self->{meta}->{$descent}->{storage}->sendQuery({ |
| 942 |
node => $self->{meta}->{$descent}->{node}, |
| 943 |
subnodes => [qw( cs )], |
| 944 |
criterias => [ |
| 945 |
{ key => $self->{meta}->{$descent}->{IdentProvider}->{arg}, |
| 946 |
op => 'eq', |
| 947 |
val => $ident }, |
| 948 |
] |
| 949 |
}); |
| 950 |
|
| 951 |
my $entry = $result->getNextEntry(); |
| 952 |
my $status = $result->getStatus(); |
| 953 |
|
| 954 |
# TODO: enhance error handling (store inside tc) |
| 955 |
#if (!$row) { |
| 956 |
# print "\n", "row error", "\n"; |
| 957 |
# next; |
| 958 |
#} |
| 959 |
if (($status && $status->{err}) || !$entry) { |
| 960 |
#$logger->critical( __PACKAGE__ . "->_loadNode (ident=\"$ident\") failed" ); |
| 961 |
return; |
| 962 |
} |
| 963 |
# was: |
| 964 |
# $self->{node}->{$descent}->{ident} = $ident; |
| 965 |
# is: |
| 966 |
# TODO: re-resolve ident from entry via metadata "IdentProvider" |
| 967 |
$self->{node}->{$descent}->{ident} = $ident; |
| 968 |
$self->{node}->{$descent}->{payload} = $entry; |
| 969 |
} |
| 970 |
|
| 971 |
return 1; |
| 972 |
|
| 973 |
} |
| 974 |
|
| 975 |
sub _doTransferToTarget { |
| 976 |
my $self = shift; |
| 977 |
my $action = shift; |
| 978 |
$self->_modifyNode('target', $action, $self->{node}->{map}); |
| 979 |
} |
| 980 |
|
| 981 |
sub _doModifySource_IdentChecksum { |
| 982 |
my $self = shift; |
| 983 |
my $ident_new = shift; |
| 984 |
# this changes an old node to a new one including ident and checksum |
| 985 |
# TODO: |
| 986 |
# - eventually introduce an external resource to store this data to |
| 987 |
# - we won't have to "re"-modify the source node here |
| 988 |
my $map = { |
| 989 |
$self->{meta}->{source}->{IdentProvider}->{arg} => $ident_new, |
| 990 |
cs => $self->{node}->{target}->{checksum}, |
| 991 |
}; |
| 992 |
#print Dumper($map); |
| 993 |
#print Dumper($self->{node}); |
| 994 |
#exit; |
| 995 |
$self->_modifyNode('source', 'update', $map); |
| 996 |
} |
| 997 |
|
| 998 |
|
| 999 |
# this is a shortcut method |
| 1000 |
# ... let's try to avoid _any_ redundant code in here (ok... - at the cost of method lookups...) |
| 1001 |
sub _getNodeList { |
| 1002 |
my $self = shift; |
| 1003 |
my $descent = shift; |
| 1004 |
my $filter = shift; |
| 1005 |
return $self->{meta}->{$descent}->{storage}->getListFiltered($self->{meta}->{$descent}->{node}, $filter); |
| 1006 |
} |
| 1007 |
|
| 1008 |
|
| 1009 |
sub _prepareNode_MetaProperties { |
| 1010 |
my $self = shift; |
| 1011 |
my $descent = shift; |
| 1012 |
|
| 1013 |
$logger->info( __PACKAGE__ . "->_prepareNode_MetaProperties( descent $descent )" ); |
| 1014 |
|
| 1015 |
# TODO: this should (better) be: "my $firstnode = $self->_getFirstNode($descent);" |
| 1016 |
my $list = $self->_getNodeList($descent); |
| 1017 |
|
| 1018 |
# get first node |
| 1019 |
my $firstnode = $list->[0]; |
| 1020 |
|
| 1021 |
# check if node contains meta properties/nodes |
| 1022 |
# TODO: "cs" is hardcoded here! |
| 1023 |
my @required = ( $self->{meta}->{$descent}->{IdentProvider}->{arg}, 'cs' ); |
| 1024 |
my @found = keys %$firstnode; |
| 1025 |
#my @diff = getDifference(\@found, \@required); |
| 1026 |
my $diff = getDifference(\@required, \@found); |
| 1027 |
#print Dumper(@found); |
| 1028 |
#print Dumper(@required); |
| 1029 |
#print Dumper(@diff); |
| 1030 |
#if (!$#diff || $#diff == -1) { |
| 1031 |
if (isEmpty($diff)) { |
| 1032 |
$logger->warning( __PACKAGE__ . "->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter..." ); |
| 1033 |
foreach (@required) { |
| 1034 |
my $sql = "ALTER TABLE $self->{meta}->{$descent}->{node} ADD COLUMN $_"; |
| 1035 |
#print "sql: $sql", "\n"; |
| 1036 |
my $res = $self->{meta}->{$descent}->{storage}->sendCommand($sql); |
| 1037 |
#print Dumper($res->getStatus()); |
| 1038 |
} |
| 1039 |
} |
| 1040 |
|
| 1041 |
} |
| 1042 |
|
| 1043 |
sub _prepareNode_DummyIdent { |
| 1044 |
my $self = shift; |
| 1045 |
my $descent = shift; |
| 1046 |
|
| 1047 |
$logger->info( __PACKAGE__ . "->_prepareNode_DummyIdent( descent $descent )" ); |
| 1048 |
|
| 1049 |
my $list = $self->_getNodeList($descent); |
| 1050 |
#print Dumper($list); |
| 1051 |
my $i = 0; |
| 1052 |
my $ident_base = 5678983; |
| 1053 |
my $ident_appendix = '0001'; |
| 1054 |
foreach my $node (@$list) { |
| 1055 |
my $ident_dummy = $i + $ident_base; |
| 1056 |
$ident_dummy .= $ident_appendix; |
| 1057 |
my $map = { |
| 1058 |
$self->{meta}->{$descent}->{IdentProvider}->{arg} => $ident_dummy, |
| 1059 |
cs => undef, |
| 1060 |
}; |
| 1061 |
|
| 1062 |
# diff lists and ... |
| 1063 |
my $diff = getDifference([keys %$node], [keys %$map]); |
| 1064 |
next if $#{$diff} == -1; |
| 1065 |
|
| 1066 |
# ... build criteria including all columns |
| 1067 |
my @crits; |
| 1068 |
foreach my $property (@$diff) { |
| 1069 |
next if !$property; |
| 1070 |
my $value = $node->{$property}; |
| 1071 |
next if !$value; |
| 1072 |
push @crits, "$property='" . quotesql($value) . "'"; |
| 1073 |
} |
| 1074 |
my $crit = join ' AND ', @crits; |
| 1075 |
print "p" if $self->{verbose}; |
| 1076 |
$self->_modifyNode($descent, 'update', $map, $crit); |
| 1077 |
$i++; |
| 1078 |
} |
| 1079 |
|
| 1080 |
print "\n" if $self->{verbose}; |
| 1081 |
|
| 1082 |
if (!$i) { |
| 1083 |
$logger->warning( __PACKAGE__ . "->_prepareNode_DummyIdent: no nodes touched" ); |
| 1084 |
} |
| 1085 |
|
| 1086 |
} |
| 1087 |
|
| 1088 |
# TODO: handle this in an abstract way (wipe out use of 'source' and/or 'target' inside core) |
| 1089 |
sub _otherSide { |
| 1090 |
my $self = shift; |
| 1091 |
my $descent = shift; |
| 1092 |
return 'source' if $descent eq 'target'; |
| 1093 |
return 'target' if $descent eq 'source'; |
| 1094 |
return ''; |
| 1095 |
} |
| 1096 |
|
| 1097 |
sub _erase_all { |
| 1098 |
my $self = shift; |
| 1099 |
my $descent = shift; |
| 1100 |
#my $node = shift; |
| 1101 |
my $node = $self->{meta}->{$descent}->{node}; |
| 1102 |
$self->{meta}->{$descent}->{storage}->eraseAll($node); |
| 1103 |
} |
| 1104 |
|
| 1105 |
|
| 1106 |
=pod |
| 1107 |
|
| 1108 |
|
| 1109 |
=head1 DESCRIPTION |
| 1110 |
|
| 1111 |
Data::Transfer::Sync is a module providing a generic synchronization process |
| 1112 |
across arbitrary/multiple storages based on a ident/checksum mechanism. |
| 1113 |
It sits on top of Data::Storage. |
| 1114 |
|
| 1115 |
|
| 1116 |
=head1 REQUIREMENTS |
| 1117 |
|
| 1118 |
For full functionality: |
| 1119 |
Data::Storage |
| 1120 |
Data::Transform |
| 1121 |
Data::Compare |
| 1122 |
... and all their dependencies |
| 1123 |
|
| 1124 |
|
| 1125 |
=head1 AUTHORS / COPYRIGHT |
| 1126 |
|
| 1127 |
The Data::Storage module is Copyright (c) 2002 Andreas Motl. |
| 1128 |
All rights reserved. |
| 1129 |
|
| 1130 |
You may distribute it under the terms of either the GNU General Public |
| 1131 |
License or the Artistic License, as specified in the Perl README file. |
| 1132 |
|
| 1133 |
|
| 1134 |
=head1 SUPPORT / WARRANTY |
| 1135 |
|
| 1136 |
Data::Storage is free software. IT COMES WITHOUT WARRANTY OF ANY KIND. |
| 1137 |
|
| 1138 |
|
| 1139 |
|
| 1140 |
=head1 BUGS |
| 1141 |
|
| 1142 |
When in "import" mode for windows file - DBD::AutoCSV may hang. |
| 1143 |
Hint: Maybe the source node contains an ident-, but no checksum-column? |
| 1144 |
|
| 1145 |
|
| 1146 |
=head1 USER LEVEL ERRORS |
| 1147 |
|
| 1148 |
=head4 Mapping |
| 1149 |
|
| 1150 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1151 |
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. |
| 1152 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1153 |
You have to create a sub for each node used in synchronization inside named Perl module. The name of this sub _must_ match |
| 1154 |
the name of the node you want to sync. This sub holds mapping metadata to give the engine hints about how |
| 1155 |
to access the otherwise generic nodes. |
| 1156 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1157 |
|
| 1158 |
|
| 1159 |
=head4 DBD::AutoCSV's rulebase |
| 1160 |
|
| 1161 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1162 |
info: BizWorks::Process::Setup->syncResource( source_node Currency mode PULL erase 0 import 0 ) |
| 1163 |
info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv |
| 1164 |
|
| 1165 |
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 |
| 1166 |
m line 165, <GEN9> line 1. |
| 1167 |
called from C:/home/amo/develop/netfrag.org/nfo/perl/libs/Data/Storage/Handler/DBI.pm at 123. |
| 1168 |
|
| 1169 |
DBI-Error: DBD::AutoCSV::st fetchrow_hashref failed: Attempt to fetch row from a Non-SELECT statement |
| 1170 |
notice: Data::Transfer::Sync->syncNodes: No nodes to synchronize. |
| 1171 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1172 |
DBD::AutoCSV contains a rulebase which is spooled down while attempting to guess the style of the csv file regarding |
| 1173 |
parameters like newline (eol), column-seperation-character (sep_char), quoting character (quote_char). |
| 1174 |
If this spool runs out of entries and no style could be resolved, DBD::CSV dies causing this "Execution ERROR" which |
| 1175 |
results in a "DBI-Error" afterwards. |
| 1176 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1177 |
|
| 1178 |
|
| 1179 |
=head4 Check structure of source node |
| 1180 |
|
| 1181 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1182 |
info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv |
| 1183 |
critical: Data::Transfer::Sync->syncNodes: Can not synchronize: No ident found in source node, maybe try to "import" this node first. |
| 1184 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1185 |
If lowlevel detection succeeds, but no other required informations are found, this message is issued. |
| 1186 |
"Other informations" might be: |
| 1187 |
- column-header-row completely missing |
| 1188 |
- ident column is empty |
| 1189 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1190 |
|
| 1191 |
|
| 1192 |
=head4 Modify structure of source node |
| 1193 |
|
| 1194 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1195 |
info: Data::Transfer::Sync->syncNodes: source=L/Currency <- target=R/currencies.csv |
| 1196 |
info: Data::Transfer::Sync->_prepareNode_MetaProperties( descent source ) |
| 1197 |
warning: Data::Transfer::Sync->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter... |
| 1198 |
SQL ERROR: Command 'ALTER' not recognized or not supported! |
| 1199 |
|
| 1200 |
SQL ERROR: Command 'ALTER' not recognized or not supported! |
| 1201 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1202 |
The Engine found a node which structure does not match the required. It tries to alter this automatically - only when doing "import" - |
| 1203 |
but the DBD driver (in this case DBD::CSV) gets in the way croaking not to be able to do this. |
| 1204 |
This could also appear if your database connection has insufficient rights to modify the database structure. |
| 1205 |
DBD::CSV croaks because it doesn't implement the ALTER command, so please edit your columns manually. |
| 1206 |
Hint: Add columns with the names of your "ident" and "checksum" property specifications. |
| 1207 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1208 |
|
| 1209 |
|
| 1210 |
=head4 Load source node by ident |
| 1211 |
|
| 1212 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1213 |
info: Data::Transfer::Sync->_prepareNode_DummyIdent( descent source ) |
| 1214 |
pcritical: Data::Transfer::Sync->_modifyNode failed: "source" node is empty. |
| 1215 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1216 |
The source node could not be loaded. Maybe the ident is missing. Please check manually. |
| 1217 |
Hint: Like above, the ident and/or checksum columns may be missing.... |
| 1218 |
- - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1219 |
|
| 1220 |
|
| 1221 |
=head1 TODO |
| 1222 |
|
| 1223 |
- sub _resolveIdentProvider |
| 1224 |
- wrap _doModifySource and _doTransferTarget around a core function which can change virtually any type of node |
| 1225 |
- split this module up into Sync.pm, Sync/Core.pm, Sync/Compare.pm and Sync/Compare/Checksum.pm |
| 1226 |
- introduce _compareNodes as a core method and wrap it around methods in Sync/Compare/Checksum.pm |
| 1227 |
- introduce Sync/Compare/MyComparisonImplementation.pm |
| 1228 |
- some generic deferring method - e.g. "$self->defer(action)" - to be able to accumulate a bunch of actions for later processing |
| 1229 |
- this implies everything done is _really_ split up into generic actions - how else would we defer them??? |
| 1230 |
- example uses: |
| 1231 |
- fetch whole checksum list from node |
| 1232 |
- remember source ident retransmits |
| 1233 |
- remember: this is convenient - and maybe / of course faster - but we'll loose "per-node-atomic" operations |
| 1234 |
- feature: mechanism to implicit inject checksum property to nodes (alter table / modify schema) |
| 1235 |
- expand statistics / keep track of: |
| 1236 |
- touched/untouched nodes |
| 1237 |
- full sync |
| 1238 |
- just do a push and a pull for now but use stats for touched nodes in between to speed up things |
| 1239 |
- introduce some new metadata flags for a synchronization partner which is (e.g.) of "source" or "target": |
| 1240 |
- isNewNodePropagator |
| 1241 |
- isWriteProtected |
| 1242 |
|
| 1243 |
|
| 1244 |
=cut |
| 1245 |
|
| 1246 |
1; |
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