mirror of
https://github.com/pgbackrest/pgbackrest.git
synced 2024-12-14 10:13:05 +02:00
610 lines
22 KiB
Perl
610 lines
22 KiB
Perl
####################################################################################################################################
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# ARCHIVE INFO MODULE
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#
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# The archive.info file is created when archiving begins. It is located under the stanza directory. The file contains information
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# regarding the stanza database version, database WAL segment system id and other information to ensure that archiving is being
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# performed on the proper database.
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####################################################################################################################################
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package pgBackRest::Archive::Info;
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use parent 'pgBackRest::Common::Ini';
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use strict;
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use warnings FATAL => qw(all);
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use Carp qw(confess);
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use English '-no_match_vars';
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use Exporter qw(import);
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our @EXPORT = qw();
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use File::Basename qw(dirname basename);
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use pgBackRest::Archive::Common;
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use pgBackRest::Common::Exception;
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use pgBackRest::Config::Config;
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use pgBackRest::Common::Ini;
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use pgBackRest::Common::Log;
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use pgBackRest::DbVersion;
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use pgBackRest::InfoCommon;
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use pgBackRest::Manifest;
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use pgBackRest::Protocol::Storage::Helper;
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use pgBackRest::Storage::Base;
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use pgBackRest::Storage::Filter::Gzip;
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use pgBackRest::Storage::Helper;
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####################################################################################################################################
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# File/path constants
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####################################################################################################################################
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use constant ARCHIVE_INFO_FILE => 'archive.info';
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push @EXPORT, qw(ARCHIVE_INFO_FILE);
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####################################################################################################################################
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# Archive info constants
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####################################################################################################################################
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use constant INFO_ARCHIVE_SECTION_DB => INFO_BACKUP_SECTION_DB;
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push @EXPORT, qw(INFO_ARCHIVE_SECTION_DB);
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use constant INFO_ARCHIVE_SECTION_DB_HISTORY => INFO_BACKUP_SECTION_DB_HISTORY;
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push @EXPORT, qw(INFO_ARCHIVE_SECTION_DB_HISTORY);
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use constant INFO_ARCHIVE_KEY_DB_VERSION => MANIFEST_KEY_DB_VERSION;
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push @EXPORT, qw(INFO_ARCHIVE_KEY_DB_VERSION);
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use constant INFO_ARCHIVE_KEY_DB_ID => MANIFEST_KEY_DB_ID;
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push @EXPORT, qw(INFO_ARCHIVE_KEY_DB_ID);
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use constant INFO_ARCHIVE_KEY_DB_SYSTEM_ID => MANIFEST_KEY_SYSTEM_ID;
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push @EXPORT, qw(INFO_ARCHIVE_KEY_DB_SYSTEM_ID);
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####################################################################################################################################
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# Global variables
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####################################################################################################################################
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my $strArchiveInfoMissingMsg =
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ARCHIVE_INFO_FILE . " does not exist but is required to push/get WAL segments\n" .
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"HINT: is archive_command configured in postgresql.conf?\n" .
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"HINT: has a stanza-create been performed?\n" .
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"HINT: use --no-archive-check to disable archive checks during backup if you have an alternate archiving scheme.";
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####################################################################################################################################
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# CONSTRUCTOR
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####################################################################################################################################
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sub new
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{
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my $class = shift; # Class name
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strArchiveClusterPath, # Archive cluster path
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$bRequired, # Is archive info required?
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$bLoad, # Should the file attempt to be loaded?
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$bIgnoreMissing, # Don't error on missing files
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$strCipherPassSub, # Passphrase to encrypt the subsequent archive files if repo is encrypted
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) =
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logDebugParam
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(
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__PACKAGE__ . '->new', \@_,
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{name => 'strArchiveClusterPath'},
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{name => 'bRequired', default => true},
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{name => 'bLoad', optional => true, default => true},
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{name => 'bIgnoreMissing', optional => true, default => false},
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{name => 'strCipherPassSub', optional => true},
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);
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# Build the archive info path/file name
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my $strArchiveInfoFile = "${strArchiveClusterPath}/" . ARCHIVE_INFO_FILE;
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my $self = {};
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my $iResult = 0;
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my $strResultMessage;
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# Init object and store variables
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eval
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{
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$self = $class->SUPER::new($strArchiveInfoFile, {bLoad => $bLoad, bIgnoreMissing => $bIgnoreMissing,
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oStorage => storageRepo(), strCipherPass => storageRepo()->cipherPassUser(),
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strCipherPassSub => $strCipherPassSub});
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return true;
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}
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or do
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{
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# Capture error information
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$iResult = exceptionCode($EVAL_ERROR);
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$strResultMessage = exceptionMessage($EVAL_ERROR);
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};
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if ($iResult != 0)
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{
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# If the file does not exist but is required to exist, then error
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# The archive info is only allowed not to exist when running a stanza-create on a new install
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if ($iResult == ERROR_FILE_MISSING)
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{
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if ($bRequired)
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{
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confess &log(ERROR, $strArchiveInfoMissingMsg, ERROR_FILE_MISSING);
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}
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}
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elsif ($iResult == ERROR_CRYPTO && $strResultMessage =~ "^unable to flush")
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{
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confess &log(ERROR, "unable to parse '$strArchiveInfoFile'\nHINT: Is or was the repo encrypted?", $iResult);
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}
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else
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{
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confess $EVAL_ERROR;
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}
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}
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$self->{strArchiveClusterPath} = $strArchiveClusterPath;
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'self', value => $self}
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);
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}
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####################################################################################################################################
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# check
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#
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# Check archive info file and make sure it is compatible with the current version of the database for the stanza. If the file does
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# not exist an error will occur.
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####################################################################################################################################
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sub check
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{
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my $self = shift;
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strDbVersion,
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$ullDbSysId,
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$bRequired,
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) =
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logDebugParam
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(
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__PACKAGE__ . '->check', \@_,
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{name => 'strDbVersion'},
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{name => 'ullDbSysId'},
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{name => 'bRequired', default => true},
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);
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# ??? remove bRequired after stanza-upgrade
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if ($bRequired)
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{
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# Confirm the info file exists with the DB section
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$self->confirmExists();
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}
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my $strError = undef;
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if (!$self->test(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_VERSION, undef, $strDbVersion))
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{
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$strError = "WAL segment version ${strDbVersion} does not match archive version " .
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$self->get(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_VERSION);
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}
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if (!$self->test(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_SYSTEM_ID, undef, $ullDbSysId))
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{
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$strError = (defined($strError) ? ($strError . "\n") : "") .
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"WAL segment system-id ${ullDbSysId} does not match archive system-id " .
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$self->get(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_SYSTEM_ID);
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}
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if (defined($strError))
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{
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confess &log(ERROR, "${strError}\nHINT: are you archiving to the correct stanza?", ERROR_ARCHIVE_MISMATCH);
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}
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'strArchiveId', value => $self->archiveId()}
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);
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}
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####################################################################################################################################
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# archiveId
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#
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# Get the archive id which is a combination of the DB version and the db-id setting (e.g. 9.4-1)
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####################################################################################################################################
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sub archiveId
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{
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my $self = shift;
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strDbVersion,
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$ullDbSysId,
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) = logDebugParam
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(
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__PACKAGE__ . '->archiveId', \@_,
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{name => 'strDbVersion', optional => true},
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{name => 'ullDbSysId', optional => true},
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);
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my $strArchiveId = undef;
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# If neither optional version and system-id are passed then set the archive id to the current one
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if (!defined($strDbVersion) && !defined($ullDbSysId))
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{
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$strArchiveId = $self->get(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_VERSION) . "-" .
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$self->get(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_ID);
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}
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# If both the optional version and system-id are passed
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elsif (defined($strDbVersion) && defined($ullDbSysId))
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{
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# Get the newest archiveId for the version/system-id passed
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$strArchiveId = ($self->archiveIdList($strDbVersion, $ullDbSysId))[0];
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}
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'strArchiveId', value => $strArchiveId}
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);
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}
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####################################################################################################################################
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# archiveIdList
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#
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# Get a sorted list of the archive ids for the db-version and db-system-id passed.
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####################################################################################################################################
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sub archiveIdList
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{
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my $self = shift;
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strDbVersion,
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$ullDbSysId,
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) = logDebugParam
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(
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__PACKAGE__ . '->archiveIdList', \@_,
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{name => 'strDbVersion'},
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{name => 'ullDbSysId'},
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);
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my @stryArchiveId;
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# Get the version and system-id for all known databases
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my $hDbList = $self->dbHistoryList();
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foreach my $iDbHistoryId (sort {$a <=> $b} keys %$hDbList)
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{
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# If the version and system-id match then construct the archive id so that the constructed array has the newest match first
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if (($hDbList->{$iDbHistoryId}{&INFO_DB_VERSION} eq $strDbVersion) &&
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($hDbList->{$iDbHistoryId}{&INFO_SYSTEM_ID} eq $ullDbSysId))
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{
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unshift(@stryArchiveId, $strDbVersion . "-" . $iDbHistoryId);
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}
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}
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# If the archive id has still not been found, then error
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if (@stryArchiveId == 0)
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{
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confess &log(
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ERROR, "unable to retrieve the archive id for database version '$strDbVersion' and system-id '$ullDbSysId'",
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ERROR_ARCHIVE_MISMATCH);
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}
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'stryArchiveId', value => \@stryArchiveId}
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);
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}
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####################################################################################################################################
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# create
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#
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# Creates the archive.info file. WARNING - this function should only be called from stanza-create or tests.
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####################################################################################################################################
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sub create
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{
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my $self = shift;
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strDbVersion,
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$ullDbSysId,
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$bSave,
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) =
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logDebugParam
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(
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__PACKAGE__ . '->create', \@_,
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{name => 'strDbVersion'},
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{name => 'ullDbSysId'},
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{name => 'bSave', default => true},
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);
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# Fill db section and db history section
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$self->dbSectionSet($strDbVersion, $ullDbSysId, $self->dbHistoryIdGet(false));
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if ($bSave)
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{
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$self->save();
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}
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# Return from function and log return values if any
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return logDebugReturn($strOperation);
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}
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####################################################################################################################################
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# reconstruct
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#
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# Reconstruct the info file from the existing directory and files
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####################################################################################################################################
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sub reconstruct
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{
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my $self = shift;
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$strCurrentDbVersion,
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$ullCurrentDbSysId,
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) =
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logDebugParam
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(
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__PACKAGE__ . '->reconstruct', \@_,
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{name => 'strCurrentDbVersion'},
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{name => 'ullCurrentDbSysId'},
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);
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my $strInvalidFileStructure = undef;
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my @stryArchiveId = storageRepo()->list(
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$self->{strArchiveClusterPath}, {strExpression => REGEX_ARCHIVE_DIR_DB_VERSION, bIgnoreMissing => true});
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my %hDbHistoryVersion;
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# Get the db-version and db-id (history id) from the upper level directory names, e.g. 9.4-1
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foreach my $strArchiveId (@stryArchiveId)
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{
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my ($strDbVersion, $iDbHistoryId) = split("-", $strArchiveId);
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$hDbHistoryVersion{$iDbHistoryId} = $strDbVersion;
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}
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# Loop through the DBs in the order they were created as indicated by the db-id so that the last one is set in the db section
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foreach my $iDbHistoryId (sort {$a <=> $b} keys %hDbHistoryVersion)
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{
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my $strDbVersion = $hDbHistoryVersion{$iDbHistoryId};
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my $strVersionDir = $strDbVersion . "-" . $iDbHistoryId;
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# Get the name of the first archive directory
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my $strArchiveDir = (storageRepo()->list(
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$self->{strArchiveClusterPath} . "/${strVersionDir}",
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{strExpression => REGEX_ARCHIVE_DIR_WAL, bIgnoreMissing => true}))[0];
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# Continue if any file structure or missing files info
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if (!defined($strArchiveDir))
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{
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$strInvalidFileStructure = "found empty directory " . $self->{strArchiveClusterPath} . "/${strVersionDir}";
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next;
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}
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# ??? Should probably make a function in ArchiveCommon
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my $strArchiveFile = (storageRepo()->list(
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$self->{strArchiveClusterPath} . "/${strVersionDir}/${strArchiveDir}",
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{strExpression => "^[0-F]{24}(\\.partial){0,1}(-[0-f]+){0,1}(\\." . COMPRESS_EXT . "){0,1}\$",
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bIgnoreMissing => true}))[0];
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# Continue if any file structure or missing files info
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if (!defined($strArchiveFile))
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{
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$strInvalidFileStructure =
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"found empty directory " . $self->{strArchiveClusterPath} . "/${strVersionDir}/${strArchiveDir}";
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next;
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}
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# Get the full path for the file
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my $strArchiveFilePath = $self->{strArchiveClusterPath}."/${strVersionDir}/${strArchiveDir}/${strArchiveFile}";
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# Get the db-system-id from the WAL file depending on the version of postgres
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my $iSysIdOffset = $strDbVersion >= PG_VERSION_93 ? PG_WAL_SYSTEM_ID_OFFSET_GTE_93 : PG_WAL_SYSTEM_ID_OFFSET_LT_93;
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# Read first 8k of WAL segment
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my $tBlock;
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# Error if the file encryption setting is not valid for the repo
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if (!storageRepo()->encryptionValid(storageRepo()->encrypted($strArchiveFilePath)))
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{
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confess &log(ERROR, "encryption incompatible for '$strArchiveFilePath'" .
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"\nHINT: Is or was the repo encrypted?", ERROR_CRYPTO);
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}
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# If the file is encrypted, then the passprase from the info file is required, else getEncryptionKeySub returns undefined
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my $oFileIo = storageRepo()->openRead(
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$strArchiveFilePath,
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{rhyFilter => $strArchiveFile =~ ('\.' . COMPRESS_EXT . '$') ?
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[{strClass => STORAGE_FILTER_GZIP, rxyParam => [{strCompressType => STORAGE_DECOMPRESS}]}] : undef,
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strCipherPass => $self->cipherPassSub()});
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$oFileIo->read(\$tBlock, 512, true);
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$oFileIo->close();
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# Get the required data from the file that was pulled into scalar $tBlock
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my ($iMagic, $iFlag, $junk, $ullDbSysId) = unpack('SSa' . $iSysIdOffset . 'Q', $tBlock);
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if (!defined($ullDbSysId))
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{
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confess &log(ERROR, "unable to read database system identifier", ERROR_FILE_READ);
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}
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# Fill db section and db history section
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$self->dbSectionSet($strDbVersion, $ullDbSysId, $iDbHistoryId);
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}
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# If the DB section does not exist, then there were no valid directories to read from so create the DB and History sections.
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if (!$self->test(INFO_ARCHIVE_SECTION_DB))
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{
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$self->create($strCurrentDbVersion, $ullCurrentDbSysId, false);
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}
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# Else if it does exist but does not match the current DB, then update the DB section
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else
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{
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# Turn off console logging to control when to display the error
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logDisable();
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eval
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{
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$self->check($strCurrentDbVersion, $ullCurrentDbSysId, false);
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logEnable();
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return true;
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}
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or do
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{
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# Reset the console logging
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logEnable();
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# Confess unhandled errors
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confess $EVAL_ERROR if (exceptionCode($EVAL_ERROR) != ERROR_ARCHIVE_MISMATCH);
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# Update the DB section if it does not match the current database
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$self->dbSectionSet($strCurrentDbVersion, $ullCurrentDbSysId, $self->dbHistoryIdGet(false)+1);
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};
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}
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'strInvalidFileStructure', value => $strInvalidFileStructure}
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);
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}
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####################################################################################################################################
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# dbHistoryIdGet
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#
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# Get the db history ID
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####################################################################################################################################
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sub dbHistoryIdGet
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{
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my $self = shift;
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# Assign function parameters, defaults, and log debug info
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my
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(
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$strOperation,
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$bFileRequired,
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) =
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logDebugParam
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(
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__PACKAGE__ . '->dbHistoryIdGet', \@_,
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{name => 'bFileRequired', default => true},
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);
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# Confirm the info file exists if it is required
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if ($bFileRequired)
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{
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$self->confirmExists();
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}
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# If the DB section does not exist, initialize the history to one, else return the latest ID
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my $iDbHistoryId = (!$self->test(INFO_ARCHIVE_SECTION_DB))
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? 1 : $self->numericGet(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_ID);
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# Return from function and log return values if any
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return logDebugReturn
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(
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$strOperation,
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{name => 'iDbHistoryId', value => $iDbHistoryId}
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);
|
|
}
|
|
|
|
####################################################################################################################################
|
|
# dbHistoryList
|
|
#
|
|
# Get the data from the db history section.
|
|
####################################################################################################################################
|
|
sub dbHistoryList
|
|
{
|
|
my $self = shift;
|
|
my
|
|
(
|
|
$strOperation,
|
|
) = logDebugParam
|
|
(
|
|
__PACKAGE__ . '->dbHistoryList',
|
|
);
|
|
|
|
my %hDbHash;
|
|
|
|
foreach my $iHistoryId ($self->keys(INFO_ARCHIVE_SECTION_DB_HISTORY))
|
|
{
|
|
$hDbHash{$iHistoryId}{&INFO_DB_VERSION} =
|
|
$self->get(INFO_ARCHIVE_SECTION_DB_HISTORY, $iHistoryId, INFO_ARCHIVE_KEY_DB_VERSION);
|
|
$hDbHash{$iHistoryId}{&INFO_SYSTEM_ID} =
|
|
$self->get(INFO_ARCHIVE_SECTION_DB_HISTORY, $iHistoryId, INFO_ARCHIVE_KEY_DB_ID);
|
|
}
|
|
|
|
# Return from function and log return values if any
|
|
return logDebugReturn
|
|
(
|
|
$strOperation,
|
|
{name => 'hDbHash', value => \%hDbHash}
|
|
);
|
|
}
|
|
|
|
####################################################################################################################################
|
|
# dbSectionSet
|
|
#
|
|
# Set the db and db:history sections.
|
|
####################################################################################################################################
|
|
sub dbSectionSet
|
|
{
|
|
my $self = shift;
|
|
|
|
# Assign function parameters, defaults, and log debug info
|
|
my
|
|
(
|
|
$strOperation,
|
|
$strDbVersion,
|
|
$ullDbSysId,
|
|
$iDbHistoryId,
|
|
) =
|
|
logDebugParam
|
|
(
|
|
__PACKAGE__ . '->dbSectionSet', \@_,
|
|
{name => 'strDbVersion', trace => true},
|
|
{name => 'ullDbSysId', trace => true},
|
|
{name => 'iDbHistoryId', trace => true}
|
|
);
|
|
|
|
# Fill db section
|
|
$self->numericSet(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_SYSTEM_ID, undef, $ullDbSysId);
|
|
$self->set(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_VERSION, undef, $strDbVersion);
|
|
$self->numericSet(INFO_ARCHIVE_SECTION_DB, INFO_ARCHIVE_KEY_DB_ID, undef, $iDbHistoryId);
|
|
|
|
# Fill db history
|
|
$self->numericSet(INFO_ARCHIVE_SECTION_DB_HISTORY, $iDbHistoryId, INFO_ARCHIVE_KEY_DB_ID, $ullDbSysId);
|
|
$self->set(INFO_ARCHIVE_SECTION_DB_HISTORY, $iDbHistoryId, INFO_ARCHIVE_KEY_DB_VERSION, $strDbVersion);
|
|
|
|
# Return from function and log return values if any
|
|
return logDebugReturn($strOperation);
|
|
}
|
|
|
|
####################################################################################################################################
|
|
# confirmExists
|
|
#
|
|
# Ensure that the archive.info file and the db section exist.
|
|
####################################################################################################################################
|
|
sub confirmExists
|
|
{
|
|
my $self = shift;
|
|
|
|
# Confirm the file exists and the DB section is filled out
|
|
if (!$self->test(INFO_ARCHIVE_SECTION_DB) || !$self->{bExists})
|
|
{
|
|
confess &log(ERROR, $strArchiveInfoMissingMsg, ERROR_FILE_MISSING);
|
|
}
|
|
}
|
|
|
|
1;
|