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joko |
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## $Id: API.pm,v 1.1 2003/01/19 01:23:04 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: API.pm,v $ |
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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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## ---------------------------------------------------------------------------------------- |
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package Data::Transfer::Sync::StorageInterface; |
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use strict; |
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use warnings; |
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use mixin::with qw( Data::Transfer::Sync ); |
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# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - main |
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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use Data::Dumper; |
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# this is a shortcut method |
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# ... let's try to avoid _any_ redundant code in here (ok... - at the cost of method lookups...) |
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sub _getNodeList { |
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my $self = shift; |
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my $descent = shift; |
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my $filter = shift; |
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#$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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my $list = $self->{meta}->{$descent}->{storage}->getListFiltered($self->{meta}->{$descent}->{nodeName}, $filter); |
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#print Dumper($list); |
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return $list; |
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} |
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sub _resolveNodeIdent { |
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my $self = shift; |
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my $descent = shift; |
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#print Dumper($self->{node}->{$descent}); |
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# get to the payload |
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#my $item = $specifier->{item}; |
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my $payload = $self->{node}->{$descent}->{payload}; |
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# resolve method to get to the id of the given item |
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# we use global metadata and the given descent for this task |
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#my $ident = $self->{$descent}->id($item); |
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#my $ident = $self->{meta}->{$descent}->{storage}->id($item); |
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my $ident; |
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my $provider_method = $self->{meta}->{$descent}->{IdentProvider}->{method}; |
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my $provider_arg = $self->{meta}->{$descent}->{IdentProvider}->{arg}; |
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#print "provider_method: $provider_method", "\n"; |
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#print "provider_arg: $provider_arg", "\n"; |
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# resolve to ident |
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if (lc $provider_method eq 'property') { |
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$ident = $payload->{$provider_arg}; |
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} elsif (lc $provider_method eq 'storage_method') { |
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#$ident = $self->{meta}->{$descent}->{storage}->id($item); |
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$ident = $self->{meta}->{$descent}->{storage}->$provider_arg($payload); |
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} elsif (lc $provider_method eq 'code') { |
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$ident = 'ac'; |
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} |
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$self->{node}->{$descent}->{ident} = $ident; |
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return 1 if $ident; |
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} |
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# TODO: |
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# this should be split up into... |
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# - a "_statNode" (should just touch the node to check for existance) |
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# - a "_loadNode" (should load node completely) |
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# - maybe additionally a "loadNodeProperty" (may specify properties to load) |
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# - introduce $self->{nodecache} for this purpose |
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# TODO: |
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# should we: |
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# - not pass ident in here but resolve it via "$descent"? |
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# - refactor this and stuff it with additional debug/error message |
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# - this = the way the implicit load mechanism works |
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sub _statloadNode { |
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my $self = shift; |
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my $descent = shift; |
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my $ident = shift; |
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my $force = shift; |
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# fetch entry to retrieve checksum from |
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# was: |
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if (!$self->{node}->{$descent} || $force) { |
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# is: |
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#if (!$self->{node}->{$descent}->{item} || $force) { |
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if (!$ident) { |
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#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"; |
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return; |
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} |
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# patch for DBD::CSV |
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if ($ident && $ident eq 'Null') { |
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return; |
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} |
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#print "yai!", "\n"; |
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my $query = { |
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node => $self->{meta}->{$descent}->{nodeName}, |
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subnodes => [qw( cs )], |
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criterias => [ |
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{ key => $self->{meta}->{$descent}->{IdentProvider}->{arg}, |
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op => 'eq', |
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val => $ident }, |
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] |
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}; |
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print Dumper($query); |
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my $result = $self->{meta}->{$descent}->{storage}->sendQuery($query); |
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my $entry = $result->getNextEntry(); |
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#print Dumper($entry); |
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#print "pers: " . $self->{meta}->{$descent}->{storage}->is_persistent($entry), "\n"; |
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#my $state = $self->{meta}->{$descent}->{storage}->_fetch_object_state($entry, { name => 'TransactionHop' } ); |
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#print Dumper($state); |
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my $status = $result->getStatus(); |
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#print Dumper($status); |
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# TODO: enhance error handling (store inside tc) |
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#if (!$row) { |
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# print "\n", "row error", "\n"; |
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# next; |
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#} |
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# these checks run before actually loading payload- and meta-data to node-container |
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# 1st level - hard error |
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if ($status && $status->{err}) { |
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$logger->debug( __PACKAGE__ . "->_statloadNode (ident=\"$ident\") failed - hard error (that's ok): $status->{err}" ); |
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return; |
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} |
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# 2nd level - logical (empty/notfound) error |
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if (($status && $status->{empty}) || !$entry) { |
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$logger->debug( __PACKAGE__ . "->_statloadNode (ident=\"$ident\") failed - logical error (that's ok)" ); |
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#print "no entry (logical)", "\n"; |
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return; |
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} |
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#print Dumper($entry); |
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# was: |
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# $self->{node}->{$descent}->{ident} = $ident; |
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# is: |
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# TODO: re-resolve ident from entry via metadata "IdentProvider" here - like elsewhere |
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$self->{node}->{$descent}->{ident} = $ident; |
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$self->{node}->{$descent}->{payload} = $entry; |
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} |
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return 1; |
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} |
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1; |
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