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## ------------------------------------------------------------------------- |
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## |
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## $Id: Core.pm,v 1.10 2003/06/25 23:03:57 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: Core.pm,v $ |
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## Revision 1.10 2003/06/25 23:03:57 joko |
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## no debugging |
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## |
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## Revision 1.9 2003/05/13 08:17:52 joko |
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## buildAttributeMap now propagates error |
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## |
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## Revision 1.8 2003/03/27 15:31:15 joko |
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## fixes to modules regarding new namespace(s) below Data::Mungle::* |
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## |
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## Revision 1.7 2003/02/21 08:01:11 joko |
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## debugging, logging |
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## renamed module |
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## |
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## Revision 1.6 2003/02/14 14:03:49 joko |
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## + logging, debugging |
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## - refactored code to sister module |
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## |
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## Revision 1.5 2003/02/11 05:30:47 joko |
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## + minor fixes and some debugging mud |
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## |
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## Revision 1.4 2003/02/09 05:01:10 joko |
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## + major structure changes |
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## - refactored code to sister modules |
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## |
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## Revision 1.3 2003/01/20 17:01:14 joko |
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## + cosmetics and debugging |
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## + probably refactored code to new plugin-modules 'Metadata.pm' and/or 'StorageInterface.pm' (guess it was the last one...) |
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## |
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## Revision 1.2 2003/01/19 02:05:42 joko |
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## - removed pod-documentation: now in Data/Transfer/Sync.pod |
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## |
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## Revision 1.1 2003/01/19 01:23:04 joko |
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## + new from Data/Transfer/Sync.pm |
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## |
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## Revision 1.11 2002/12/23 07:10:59 joko |
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## + using MD5 for checksum generation again - the 32-bit integer hash from DBI seems to be too lazy |
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## |
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## Revision 1.10 2002/12/19 01:07:16 joko |
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## + fixed output done via $logger |
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## |
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## Revision 1.9 2002/12/16 07:02:34 jonen |
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## + added comment |
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## |
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## Revision 1.8 2002/12/15 02:03:09 joko |
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## + fixed logging-messages |
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## + additional metadata-checks |
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## |
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## Revision 1.7 2002/12/13 21:49:34 joko |
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## + sub configure |
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## + sub checkOptions |
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## |
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## Revision 1.6 2002/12/06 04:49:10 jonen |
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## + disabled output-puffer here |
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## |
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## Revision 1.5 2002/12/05 08:06:05 joko |
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## + bugfix with determining empty fields (Null) with DBD::CSV |
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## + debugging |
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## + updated comments |
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## |
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## Revision 1.4 2002/12/03 15:54:07 joko |
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## + {import}-flag is now {prepare}-flag |
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## |
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## Revision 1.3 2002/12/01 22:26:59 joko |
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## + minor cosmetics for logging |
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## |
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## Revision 1.2 2002/12/01 04:43:25 joko |
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## + mapping detail entries may now be either an ARRAY or a HASH |
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## + erase flag is used now (for export-operations) |
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## + expressions to refer to values inside deep nested structures |
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## - removed old mappingV2-code |
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## + cosmetics |
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## + sub _erase_all |
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## |
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## Revision 1.1 2002/11/29 04:45:50 joko |
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## + initial check in |
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## |
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## Revision 1.1 2002/10/10 03:44:21 cvsjoko |
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## + new |
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## ------------------------------------------------------------------------- |
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|
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|
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package Data::Transfer::Sync::Core; |
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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 misc::HashExt; |
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use Hash::Serializer; |
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use Data::Mungle::Compare::Struct qw( getDifference isEmpty ); |
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use Data::Mungle::Transform::Deep qw( deep_copy expand ); |
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use Data::Storage::Container; |
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use DesignPattern::Object; |
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use shortcuts::database qw( quotesql ); |
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|
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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|
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$| = 1; |
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|
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=pod |
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sub new { |
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my $invocant = shift; |
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my $class = ref($invocant) || $invocant; |
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my $self = {}; |
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$logger->debug( __PACKAGE__ . "->new(@_)" ); |
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bless $self, $class; |
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$self->configure(@_); |
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return $self; |
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} |
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=cut |
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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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# trace |
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#print Dumper($self); |
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#exit; |
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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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sub _initV1 { |
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my $self = shift; |
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$logger->debug( __PACKAGE__ . "->_initV1" ); |
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die("this should not be reached!"); |
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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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# TODO: abstract the hardwired use of "source" and "target" in here somehow - hmmmm....... /(="ยง/%??? |
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sub _run { |
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|
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my $self = shift; |
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|
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#print "verbose: ", $self->{verbose}, "\n"; |
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$self->{verbose} = 1; |
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|
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$logger->debug( __PACKAGE__ . "->_run" ); |
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|
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# for statistics |
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my $tc = Hash::Serializer->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', $filter); |
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} |
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|
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# get reference to node list from convenient method provided by CORE-HANDLE |
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$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__ . "->_run: No nodes to synchronize." ); |
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return; |
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} |
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|
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#print Dumper(@$results); |
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#exit; |
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|
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# check if we actually *have* a synchronization method |
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if (!$self->{options}->{metadata}->{syncMethod}) { |
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$logger->critical( __PACKAGE__ . "->_run: No synchronization method (checksum|timestamp) specified" ); |
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return; |
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} |
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|
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|
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# dereference |
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my @results = @{$results}; |
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#print Dumper(@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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print ":" if $self->{verbose}; |
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|
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#print Dumper($source_node_real); |
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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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# - so, just use its reference for now - if some cloning is needed in future, do this here! |
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my $source_node = $source_node_real; |
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#my $source_node = expand($source_node_real); |
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|
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# modify entry - handle new style callbacks (the readers) |
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|
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# trace |
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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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# trace |
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#print Dumper($callbacks); |
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#exit; |
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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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#print "cb_node: $node", "\n"; |
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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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# trace |
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#print Dumper($self->{options}); |
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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 $perl_callback = $self->{meta}->{$descent}->{nodeType} . '::' . $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 ($@) { |
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$error = 1; |
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$logger->error( __PACKAGE__ . "->_run: $@" ); |
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next; |
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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} = $cb_result; |
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|
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} |
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|
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} |
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|
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# trace |
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#print Dumper($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} = $source_node; |
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|
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# trace |
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#print Dumper($self->{node}); |
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#exit; |
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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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#print Dumper($self->{meta}->{source}); |
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$logger->critical( __PACKAGE__ . "->_run: No ident found in source node ( nodeName='$self->{meta}->{source}->{nodeName}', nodeType='$self->{meta}->{source}->{nodeType}') try to \"prepare\" this node first?" ); |
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return; |
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} |
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|
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#print "l" if $self->{verbose}; |
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my $statOK = $self->_statloadNode('target', $self->{node}->{source}->{ident}); |
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|
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# mark node as new either if there's no ident or if stat/load failed |
303 |
if (!$statOK) { |
304 |
$self->{node}->{status}->{new} = 1; |
305 |
print "n" if $self->{verbose}; |
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} |
307 |
|
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#print "checksum", "\n"; |
309 |
|
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#print Dumper($self); |
311 |
|
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# determine status of entry by synchronization method |
313 |
if ( lc $self->{options}->{metadata}->{syncMethod} eq 'checksum' ) { |
314 |
#if ( $statOK && (lc $self->{args}->{method} eq 'checksum') ) { |
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#if ( !$self->{node}->{status}->{new} && (lc $self->{args}->{method} eq 'checksum') ) { |
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|
317 |
# calculate checksum of source node |
318 |
#$self->_calcChecksum('source'); |
319 |
if (!$self->_readChecksum('source')) { |
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$logger->warning( __PACKAGE__ . "->_run: Could not find \"source\" entry with ident=\"$self->{node}->{source}->{ident}\"" ); |
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$tc->{skip}++; |
322 |
print "s" if $self->{verbose}; |
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next; |
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} |
325 |
|
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# get checksum from synchronization target |
327 |
$self->_readChecksum('target'); |
328 |
#if (!$self->_readChecksum('target')) { |
329 |
# $logger->critical( __PACKAGE__ . "->_readChecksum: Could not find \"target\" entry with ident=\"$self->{node}->{source}->{ident}\"" ); |
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# next; |
331 |
#} |
332 |
|
333 |
# pre flight check: do we actually have a checksum provided? |
334 |
#if (!$self->{node}->{source}->{checksum}) { |
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# print "Source checksum for entry with ident \"$self->{node}->{source}->{ident}\" could not be calculated, maybe it's missing?.", "\n"; |
336 |
# return; |
337 |
#} |
338 |
|
339 |
# determine if entry is "new" or "dirty" |
340 |
# after all, this seems to be the point where the hammer falls..... |
341 |
print "c" if $self->{verbose}; |
342 |
|
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# trace |
344 |
#print Dumper($self->{node}); |
345 |
#exit; |
346 |
|
347 |
$self->{node}->{status}->{new} = !$self->{node}->{target}->{checksum}; |
348 |
if (!$self->{node}->{status}->{new}) { |
349 |
$self->{node}->{status}->{dirty} = |
350 |
$self->{node}->{status}->{new} || |
351 |
(!$self->{node}->{source}->{checksum} || !$self->{node}->{target}->{checksum}) || |
352 |
($self->{node}->{source}->{checksum} ne $self->{node}->{target}->{checksum}) || |
353 |
$self->{args}->{force}; |
354 |
} |
355 |
|
356 |
} else { |
357 |
$logger->warning( __PACKAGE__ . "->_run: Synchronization method '$self->{options}->{metadata}->{syncMethod}' is not implemented" ); |
358 |
$tc->{skip}++; |
359 |
print "s" if $self->{verbose}; |
360 |
next; |
361 |
} |
362 |
|
363 |
# first reaction on entry-status: continue with next entry if the current is already "in sync" |
364 |
if (!$self->{node}->{status}->{new} && !$self->{node}->{status}->{dirty}) { |
365 |
$tc->{in_sync}++; |
366 |
next; |
367 |
} |
368 |
|
369 |
#print Dumper($self->{node}->{source}); |
370 |
|
371 |
# build map to actually transfer the data from source to target |
372 |
if (!$self->buildAttributeMap()) { |
373 |
#$logger->warning( __PACKAGE__ . "->_run: Attribute Map could not be created. Will not insert or modify node."); |
374 |
push( @{$tc->{error_per_row}}, "Attribute Map could not be created. Will not insert or modify node $self->{node}->{source}->{ident}."); |
375 |
#push( @{$tc->{error_per_row}}, "Attribute Map could not be created. Will not insert or modify node " . Dumper($self->{node}->{source}) . "."); |
376 |
$tc->{error}++; |
377 |
print "e" if $self->{verbose}; |
378 |
next; |
379 |
} |
380 |
|
381 |
# trace |
382 |
#print Dumper($self->{node}); exit; |
383 |
#print "attempt", "\n"; |
384 |
|
385 |
# additional (new) checks for feature "write-protection" |
386 |
if ($self->{meta}->{target}->{storage}->{isWriteProtected}) { |
387 |
$tc->{attempt_transfer}++; |
388 |
print "\n" if $self->{verbose}; |
389 |
$logger->notice( __PACKAGE__ . "->_run: Target is write-protected. Will not insert or modify node. " . |
390 |
"(Ident: $self->{node}->{source}->{ident} " . "Dump:\n" . Dumper($self->{node}->{source}->{payload}) . ")" ); |
391 |
print "\n" if $self->{verbose}; |
392 |
$tc->{skip}++; |
393 |
next; |
394 |
} |
395 |
|
396 |
# trace |
397 |
#print Dumper($self); |
398 |
#exit; |
399 |
|
400 |
# transfer contents of map to target |
401 |
if ($self->{node}->{status}->{new}) { |
402 |
$tc->{attempt_new}++; |
403 |
$self->_doTransferToTarget('insert'); |
404 |
# asymmetry: refetch node from target to re-calculate new ident and checksum (TODO: is IdentAuthority of relevance here?) |
405 |
#print Dumper($self->{node}); |
406 |
$self->_statloadNode('target', $self->{node}->{target}->{ident}, 1); |
407 |
$self->_readChecksum('target'); |
408 |
|
409 |
} elsif ($self->{node}->{status}->{dirty}) { |
410 |
$tc->{attempt_modify}++; |
411 |
# asymmetry: get ident before updating (TODO: is IdentAuthority of relevance here?) |
412 |
$self->{node}->{target}->{ident} = $self->{node}->{map}->{$self->{meta}->{target}->{IdentProvider}->{arg}}; |
413 |
$self->_doTransferToTarget('update'); |
414 |
$self->_readChecksum('target'); |
415 |
} |
416 |
|
417 |
if ($self->{node}->{status}->{ok}) { |
418 |
$tc->{ok}++; |
419 |
print "t" if $self->{verbose}; |
420 |
} |
421 |
|
422 |
if ($self->{node}->{status}->{error}) { |
423 |
$tc->{error}++; |
424 |
push( @{$tc->{error_per_row}}, $self->{node}->{status}->{error} ); |
425 |
print "e" if $self->{verbose}; |
426 |
} |
427 |
|
428 |
# trace |
429 |
#print Dumper($self); |
430 |
#exit; |
431 |
|
432 |
# change ident in source (take from target), if transfer was ok and target is an IdentAuthority |
433 |
# this is (for now) called a "retransmit" indicated by a "r"-character when verbosing |
434 |
#if ($self->{node}->{status}->{ok} && $self->{options}->{target}->{storage}->{idAuthority}) { |
435 |
if ($self->{node}->{status}->{ok} && $self->{meta}->{target}->{isIdentAuthority}) { |
436 |
print "r" if $self->{verbose}; |
437 |
#print Dumper($self->{meta}); |
438 |
#print Dumper($self->{node}); |
439 |
#exit; |
440 |
$self->_doModifySource_IdentChecksum($self->{node}->{target}->{ident}); |
441 |
} |
442 |
|
443 |
#print "UNLOAD", "\n"; |
444 |
#$self->{meta}->{source}->{storage}->unload( $self->{node}->{source}->{payload} ); |
445 |
|
446 |
} |
447 |
|
448 |
print "\n" if $self->{verbose}; |
449 |
|
450 |
# build user-message from some stats |
451 |
my $msg = "statistics: $tc"; |
452 |
|
453 |
if ($tc->{error_per_row}) { |
454 |
$msg .= "\n"; |
455 |
$msg .= "errors from \"error_per_row\":" . "\n"; |
456 |
$msg .= Dumper($tc->{error_per_row}); |
457 |
} |
458 |
|
459 |
# todo!!! |
460 |
#sysevent( { usermsg => $msg, level => $level }, $taskEvent ); |
461 |
#$logger->info( __PACKAGE__ . "->_run: $msg" ); |
462 |
$logger->info($msg . "\n"); |
463 |
|
464 |
return $tc; |
465 |
|
466 |
} |
467 |
|
468 |
|
469 |
# refactor this as some core-function to do a generic dump resolving data-encapsulations of e.g. Set::Object |
470 |
sub _dumpCompact { |
471 |
my $self = shift; |
472 |
|
473 |
#my $vars = \@_; |
474 |
my @data = (); |
475 |
|
476 |
my $count = 0; |
477 |
foreach (@_) { |
478 |
my $item = {}; |
479 |
foreach my $key (keys %$_) { |
480 |
my $val = $_->{$key}; |
481 |
|
482 |
#print Dumper($val); |
483 |
|
484 |
if (ref $val eq 'Set::Object') { |
485 |
#print "========================= SET", "\n"; |
486 |
#print Dumper($val); |
487 |
#print Dumper($val->members()); |
488 |
#$val = $val->members(); |
489 |
#$vars->[$count]->{$key} = $val->members() if $val->can("members"); |
490 |
#$item->{$key} = $val->members() if $val->can("members"); |
491 |
$item->{$key} = $val->members(); |
492 |
#print Dumper($vars->[$count]->{$key}); |
493 |
|
494 |
} else { |
495 |
$item->{$key} = $val; |
496 |
} |
497 |
|
498 |
} |
499 |
push @data, $item; |
500 |
$count++; |
501 |
} |
502 |
|
503 |
#print "Dump:", Dumper(@data), "\n"; |
504 |
|
505 |
$Data::Dumper::Indent = 0; |
506 |
my $result = Dumper(@data); |
507 |
$Data::Dumper::Indent = 2; |
508 |
return $result; |
509 |
|
510 |
} |
511 |
|
512 |
|
513 |
|
514 |
sub _doTransferToTarget { |
515 |
my $self = shift; |
516 |
my $action = shift; |
517 |
|
518 |
# trace |
519 |
#print Dumper($self->{meta}); |
520 |
#print Dumper($self->{node}); |
521 |
#exit; |
522 |
|
523 |
$self->_modifyNode('target', $action, $self->{node}->{map}); |
524 |
} |
525 |
|
526 |
|
527 |
sub _doModifySource_IdentChecksum { |
528 |
my $self = shift; |
529 |
my $ident_new = shift; |
530 |
# this changes an old node to a new one including ident and checksum |
531 |
# TODO: |
532 |
# - eventually introduce an external resource to store this data to |
533 |
# - we won't have to "re"-modify the source node here |
534 |
my $map = { |
535 |
$self->{meta}->{source}->{IdentProvider}->{arg} => $ident_new, |
536 |
cs => $self->{node}->{target}->{checksum}, |
537 |
}; |
538 |
|
539 |
#print Dumper($map); |
540 |
#print Dumper($self->{node}); |
541 |
#exit; |
542 |
|
543 |
$self->_modifyNode('source', 'update', $map); |
544 |
} |
545 |
|
546 |
|
547 |
|
548 |
sub _prepareNode_MetaProperties { |
549 |
my $self = shift; |
550 |
my $descent = shift; |
551 |
|
552 |
$logger->info( __PACKAGE__ . "->_prepareNode_MetaProperties( descent $descent )" ); |
553 |
|
554 |
# TODO: this should (better) be: "my $firstnode = $self->_getFirstNode($descent);" |
555 |
my $list = $self->_getNodeList($descent); |
556 |
|
557 |
# get first node |
558 |
my $firstnode = $list->[0]; |
559 |
|
560 |
# check if node contains meta properties/nodes |
561 |
# TODO: "cs" is hardcoded here! |
562 |
my @required = ( $self->{meta}->{$descent}->{IdentProvider}->{arg}, 'cs' ); |
563 |
my @found = keys %$firstnode; |
564 |
#my @diff = getDifference(\@found, \@required); |
565 |
my $diff = getDifference(\@required, \@found); |
566 |
#print Dumper(@found); |
567 |
#print Dumper(@required); |
568 |
#print Dumper(@diff); |
569 |
#if (!$#diff || $#diff == -1) { |
570 |
if (isEmpty($diff)) { |
571 |
$logger->warning( __PACKAGE__ . "->_prepareNode_MetaProperties: node is lacking meta properties - will try to alter..." ); |
572 |
foreach (@required) { |
573 |
my $sql = "ALTER TABLE $self->{meta}->{$descent}->{node} ADD COLUMN $_"; |
574 |
#print "sql: $sql", "\n"; |
575 |
my $res = $self->{meta}->{$descent}->{storage}->sendCommand($sql); |
576 |
#print Dumper($res->getStatus()); |
577 |
} |
578 |
} |
579 |
|
580 |
} |
581 |
|
582 |
sub _prepareNode_DummyIdent { |
583 |
my $self = shift; |
584 |
my $descent = shift; |
585 |
|
586 |
$logger->info( __PACKAGE__ . "->_prepareNode_DummyIdent( descent $descent )" ); |
587 |
|
588 |
my $list = $self->_getNodeList($descent); |
589 |
#print Dumper($list); |
590 |
my $i = 0; |
591 |
my $ident_base = 5678983; |
592 |
my $ident_appendix = '0001'; |
593 |
foreach my $node (@$list) { |
594 |
my $ident_dummy = $i + $ident_base; |
595 |
$ident_dummy .= $ident_appendix; |
596 |
my $map = { |
597 |
$self->{meta}->{$descent}->{IdentProvider}->{arg} => $ident_dummy, |
598 |
cs => undef, |
599 |
}; |
600 |
|
601 |
# diff lists and ... |
602 |
my $diff = getDifference([keys %$node], [keys %$map]); |
603 |
next if $#{$diff} == -1; |
604 |
|
605 |
# ... build criteria including all columns |
606 |
my @crits; |
607 |
foreach my $property (@$diff) { |
608 |
next if !$property; |
609 |
my $value = $node->{$property}; |
610 |
next if !$value; |
611 |
push @crits, "$property='" . quotesql($value) . "'"; |
612 |
} |
613 |
my $crit = join ' AND ', @crits; |
614 |
print "p" if $self->{verbose}; |
615 |
|
616 |
#print Dumper($map); |
617 |
#print Dumper($crit); |
618 |
|
619 |
$self->_modifyNode($descent, 'update', $map, $crit); |
620 |
$i++; |
621 |
} |
622 |
|
623 |
#print "\n" if $self->{verbose}; |
624 |
|
625 |
if (!$i) { |
626 |
$logger->warning( __PACKAGE__ . "->_prepareNode_DummyIdent: no nodes touched" ); |
627 |
} |
628 |
|
629 |
} |
630 |
|
631 |
# TODO: handle this in an abstract way (wipe out use of 'source' and/or 'target' inside core) |
632 |
sub _otherSide { |
633 |
my $self = shift; |
634 |
my $descent = shift; |
635 |
return 'source' if $descent eq 'target'; |
636 |
return 'target' if $descent eq 'source'; |
637 |
return ''; |
638 |
} |
639 |
|
640 |
|
641 |
1; |
642 |
__END__ |