1 | # This class based on arcinfo.pm
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2 | package oaiinfo;
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3 |
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4 | use constant INFO_STATUS_INDEX => 0;
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5 | use constant INFO_TIMESTAMP_INDEX => 1;
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6 | use constant INFO_DATESTAMP_INDEX => 2;
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7 |
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8 | my $OID_EARLIEST_TIMESTAMP = "_earliesttimestamp";
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9 | # Declaring as my $OID_EARLIEST_TIMESTAMP rather than constant, because it's not straightforward
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10 | # to use string constant as hash key (need to concat with empty str).
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11 | # http://perldoc.perl.org/constant.html
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12 | # But beware of using perl 'constant' as hash key:
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13 | # https://stackoverflow.com/questions/96848/is-there-any-way-to-use-a-constant-as-hash-key-in-perl
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14 | # http://forums.devshed.com/perl-programming-6/massive-using-constants-hash-keys-603600.html
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15 | # https://perlmaven.com/constants-and-read-only-variables-in-perl
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16 | # http://neilb.org/reviews/constants.html - compares different ways to declare constants in perl
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17 |
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18 | use strict;
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19 |
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20 | use arcinfo;
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21 | use dbutil;
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22 |
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23 | # Store timestamp in 2 formats: internal and external (same as oailastmodified and oailastmodifieddate)
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24 | # These times indicate the last modified date for that document. In the case of the doc being deleted,
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25 | # it's the time the doc was deleted.
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26 |
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27 | # File format read in: OID <tab> (Deletion-)Status <tab> Timestamp <tab> Datestamp
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28 |
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29 | # A special record of the db contains the timestamp of the creation of the oai-inf.db for
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30 | # the collection, representing the collection's earliest datetimestamp.
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31 | # This record has $OID_EARLIEST_TIMESTAMP for OID.
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32 | # Its deletion status is maintained at NA, not applicable.
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33 | # In cases of older oai-inf.db files where there's no $OID_EARLIEST_TIMESTAMP record, this record
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34 | # is also created but with timestamp set to the oldest lastmodified date in oai-inf.db.
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35 |
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36 | # Deletion status can be:
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37 | # E = Doc with OID exists (has not been deleted from collection). Timestamp indicates last time of build
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38 | # D = Doc with OID has been deleted. Timestamp indicates time of deletion
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39 | # PD = Provisionally Deleted. The associated timestamps are momentarily unaltered.
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40 | # NA = Not Applicable. Only for the special record with $OID_EARLIEST_TIMESTAMP as OID.
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41 |
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42 | # oaidb is "always incremental": always reflects the I/B/R/D status of archive info db,
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43 | # before the indexing step of the build phase that alters the I/B/R/D contents of archive info db.
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44 | # (I=index, B=been indexed, R=reindex; D=delete)
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45 |
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46 | sub new {
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47 | my $class = shift(@_);
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48 | my ($config_filename, $infodbtype, $verbosity) = @_;
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49 |
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50 | my $self = {
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51 | 'verbosity' => $verbosity || 0,
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52 | 'verbosity_threshold' => 5, # start printing debugging info from verbosity >= threshold
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53 | 'info'=>{} # map of {OID, array[deletion-status,timestamp,datestamp]} pairs
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54 | };
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55 |
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56 | if(!defined $infodbtype) {
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57 | $infodbtype = &dbutil::get_default_infodb_type();
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58 | }
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59 | $infodbtype = "gdbm" if ($infodbtype eq "gdbm-txtgz");
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60 | $self->{'infodbtype'} = $infodbtype;
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61 |
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62 | # Create and store the db filenames we'll be working with (tmp and livedb)
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63 | my $etc_dir = &util::get_parent_folder($config_filename);
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64 |
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65 | my $perform_firsttime_init = 0;
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66 | $self->{'oaidb_live_filepath'} = &dbutil::get_infodb_file_path($infodbtype, "oai-inf", $etc_dir, $perform_firsttime_init);
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67 | $self->{'oaidb_tmp_filepath'} = &dbutil::get_infodb_file_path($infodbtype, "oai-inf-tmp", $etc_dir, $perform_firsttime_init);
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68 | $self->{'etc_dir'} = $etc_dir;
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69 | # print STDERR "############ LIVE DB: $self->{'oaidb_live_filepath'}\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
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70 | # print STDERR "############ TMP DB: $self->{'oaidb_tmp_filepath'}\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
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71 |
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72 | $self->{'oaidb_file_path'} = $self->{'oaidb_tmp_filepath'}; # db file we're working with
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73 |
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74 | return bless $self, $class;
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75 | }
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76 |
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77 | # this subroutine will work out the starting contents of the tmp-db (temporary oai db):
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78 | # whether it should start off empty, or with the contents of any existing live-db,
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79 | # or with the contents of any existing tmp-db.
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80 | sub init_tmpdb {
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81 | my $self = shift(@_);
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82 | my ($removeold, $have_manifest) = @_;
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83 |
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84 | # if we have a manifest file, then we pretend we are fully incremental for oaiinfo db.
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85 | # removeold implies proper full-rebuild, whereas keepold or incremental means incremental
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86 | if($have_manifest) { # if we have a manifest file, we're not doing removeold/full-rebuild either
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87 | $removeold = 0;
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88 | }
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89 |
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90 | my $do_pd_step = ($removeold) ? 1 : 0;
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91 | # if $removeold, then proper full rebuild, will carry out step where all E will be marked as PD
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92 | # else some kind of incremental build, won't do the extra PD pass
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93 | # which is the step marking existing OIDs (E) as PD (provisionally deleted)
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94 |
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95 | my $oaidb_live_filepath = $self->{'oaidb_live_filepath'};
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96 | my $oaidb_tmp_filepath = $self->{'oaidb_tmp_filepath'};
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97 | my $infodbtype = $self->{'infodbtype'};
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98 | # Note: the live db can only exist if the collection has been activated at least once before
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99 | my $livedb_exists = &FileUtils::fileExists($oaidb_live_filepath);
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100 | my $tmpdb_exists = &FileUtils::fileExists($oaidb_tmp_filepath);
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101 |
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102 | my $initdb = 0;
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103 |
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104 | # work out what operation we need to do
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105 | # work with empty tmpdb
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106 | # copy_livedb_to_tmpdb
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107 | # work with existing tmpdb (so existing tmpdb will be topped up)
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108 |
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109 | # make_contents_of_tmpdb_empty
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110 | # make_contents_of_tmpdb_that_of_livedb
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111 | # continue_working_with_tmpdb ("contents_of_tmpdb_is_tmpdb")
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112 |
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113 | # We're going to prepare the starting state of tmpdb next.
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114 | # It can start off empty, start off with the contents of livedb, or it can start off with the contents
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115 | # of the existing tmp db. Which of these three it is depends on the 3 factors: whether livedb exists,
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116 | # whether tmpdb exists and whether or not removeold is true.
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117 | # i.o.w. which of the 3 outcomes it is depends on the truth table built on the following 3 variables:
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118 | # LDB = LiveDB exists
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119 | # TDB = TmpDB exists
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120 | # RO = Removeold
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121 | # OUTCOMES:
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122 | # clean slate (create an empty tmpdb/make tmpdb empty)
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123 | # top up tmpDB (work with existing tmpdb)
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124 | # copy LiveDB to TmpDB (liveDB's contents become the contents of TmpDB, and we'll work with that)
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125 | #
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126 | # TRUTH TABLE:
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127 | # ---------------------------------------
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128 | # LDB TDB RO | Outcome
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129 | # ---------------------------------------
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130 | # 0 0 0 | clean-slate
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131 | # 0 0 1 | clean-slate
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132 | # 0 1 0 | top-up-tmpdb
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133 | # 0 1 1 | erase tmpdb, clean-slate
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134 | # 1 0 0 | copy livedb to tmpdb
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135 | # 1 0 1 | copy livedb to tmpdb
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136 | # 1 1 0 | top-up-tmpdb
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137 | # 1 1 1 | copy livedb to tmpd
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138 | # ---------------------------------------
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139 | #
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140 | # Dr Bainbridge worked out using Karnaugh maps that, from the above truth table:
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141 | # => clean-slate/empty-tmpdb = !LDB && (RO || !TDB)
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142 | # => top-up-tmpdb/work-with-existing-tmpdb = !RO && TDB
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143 | # => copy-livedb-to-tmpdb = LDB && (!TDB || RO)
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144 | # I had most of these tests, except that I hadn't (yet) merged the two clean slate instances
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145 | # of first-build-ever and make-contents-of-tmpdb-empty
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146 |
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147 | #my $first_build_ever = (!$livedb_exists && !$tmpdb_exists);
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148 | #my $make_contents_of_tmpdb_empty = (!$livedb_exists && $tmpdb_exists && $removeold);
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149 | # Karnaugh map allows merging $first_build_ever and $make_contents_of_tmpdb_empty above
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150 | # into: my $work_with_empty_tmpdb = (!$livedb_exists && (!$tmpdb_exists || $removeold));
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151 | my $work_with_empty_tmpdb = (!$livedb_exists && (!$tmpdb_exists || $removeold));
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152 | my $make_contents_of_tmpdb_that_of_livedb = ($livedb_exists && (!$tmpdb_exists || $removeold));
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153 | my $work_with_existing_tmpdb = ($tmpdb_exists && !$removeold);
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154 |
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155 | if($work_with_empty_tmpdb) { # we'll use an empty tmpdb
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156 |
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157 | # If importing the collection for the very first time, neither db exists,
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158 | # so create an empty tmpdb.
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159 | #
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160 | # We also create an empty tmpdb when livedb doesn't exist and $removeold is true.
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161 | # This can happen if we've never run activate (so no livedb),
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162 | # yet had done some import (and perhaps building) followed by a full re-import now.
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163 | # Since there was no activate and we're doing a removeold/full-rebuild now, can just
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164 | # work with a new tmpdb, even though one already existed, its contents can be wiped out.
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165 | # In such a scenario, we'll be deleting tmpdb. Then there will be no livedb nor any tmpdb
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166 | # any more, so same situation as if importing the very first time when no oaidb exists either.
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167 |
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168 | &dbutil::remove_db_file($self->{'infodbtype'}, $oaidb_tmp_filepath) if $tmpdb_exists; # remove the db file and any assoc files
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169 | $initdb = 1; # new tmpdb
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170 |
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171 | # if the oai db is created the first time, it's like incremental and
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172 | # "keepold" (keepold means "only add, don't reprocess existing"). So
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173 | # no need to do the special passes dealing with "provisional deletes".
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174 | $do_pd_step = 0;
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175 |
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176 | } elsif ($make_contents_of_tmpdb_that_of_livedb) {
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177 |
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178 | # If the livedb exists and we're doing a full rebuild ($removeold is true),
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179 | # copy livedb to tmp regardless of if tmpdb already exists.
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180 | # Or if the livedb exists and tmpdb doesn't exist, it doesn't matter
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181 | # if we're incremental or not: also copy live to tmp and work with tmp.
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182 |
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183 | # copy livedb to tmpdb
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184 | &dbutil::remove_db_file($self->{'infodbtype'}, $oaidb_tmp_filepath) if $tmpdb_exists; # remove the db file and any assoc files
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185 | &FileUtils::copyFiles($oaidb_live_filepath, $oaidb_tmp_filepath);
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186 |
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187 | $initdb = 0; # tmpdb exists, since we just copied livedb to tmpdb, so no need to init existing tmpdb
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188 |
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189 | } else { # $work_with_existing_tmpdb, so we'll build on top of what's presently already in tmpdb
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190 | # (we'll be topping up the current tmpdb)
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191 |
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192 | # !$removeold, meaning incremental
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193 | # If incremental and have a tmpdb already, regardless of whether livedb exists,
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194 | # then work with the existing tmpdb file, as this means we've been
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195 | # importing (perhaps followed by building) repeatedly without activating the
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196 | # last time but want to maintain the (incremental) changes in tmpdb.
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197 |
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198 | $initdb = 0;
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199 |
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200 | } # Dr Bainbridge drew up Karnaugh maps on the truth table, which proved that all cases
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201 | # are indeed covered above, so don't need any other catch-all else here
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202 |
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203 | $self->{'oaidb_file_path'} = &dbutil::get_infodb_file_path($infodbtype, "oai-inf-tmp", $self->{'etc_dir'}, $initdb);
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204 | # final param follows jmt's $perform_firsttime_init in inexport.pm
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205 |
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206 | # print STDERR "@@@@@ oaidb: $self->{'oaidb_file_path'}\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
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207 |
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208 | return ($do_pd_step, $initdb);
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209 | }
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210 |
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211 | sub get_filepath {
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212 | my $self = shift (@_);
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213 | return $self->{'oaidb_file_path'};
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214 | }
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215 |
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216 | sub import_stage {
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217 | my $self = shift (@_);
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218 | my ($removeold, $have_manifest) = @_;
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219 |
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220 | my ($do_pd_step, $is_new_db) = $self->init_tmpdb($removeold, $have_manifest);
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221 | # returns 1 for $do_pd_step if the step to mark oaidb entries as PD is required
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222 | # if we're doing full rebuilding and it's NOT the first time creating the oai_inf db,
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223 | # then the tasks to do with PD (provisionally deleted) OAI OIDs should be carried out
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224 | # Returns 1 for is_new_db to allow further one time initialisation of the new oai-inf.db
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225 |
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226 | $self->load_info();
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227 | $self->print_info(); # DEBUGGING
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228 |
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229 | # A special record of the oai-inf.db will contain the timestamp when the oai-inf.db was created.
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230 | # This represents the collection's "earliest datetimestamp". It should remain unaltered
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231 | # for as long as oai-inf db exists. This record has the special OID of $OID_EARLIEST_TIMESTAMP.
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232 | # This record should not be marked as PD, but remain as E, as it can't ever be deleted.
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233 | # Although the status field for the $OID_EARLIEST_TIMESTAMP record is actually meaningless.
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234 | my $save_to_db = $self->insert_coll_earliest_timestamp($is_new_db);
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235 |
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236 | if ($do_pd_step) {
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237 | $self->mark_all_existing_as_provisionallydeleted();
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238 | $self->print_info(); # DEBUGGING
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239 |
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240 | $save_to_db = 1;
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241 | }
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242 |
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243 | if($save_to_db) {
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244 | # save changes to $self->{'info'} out to db file, now that we're done
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245 | $self->save_info();
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246 | }
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247 |
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248 | }
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249 |
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250 | sub building_stage_before_indexing() {
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251 | my $self = shift (@_);
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252 | my ($archivedir) = @_;
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253 |
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254 | # load archive info db into memory
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255 | my $arcinfo_doc_filename = &dbutil::get_infodb_file_path($self->{'infodbtype'}, "archiveinf-doc", $archivedir);
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256 | my $arcinfo_src_filename = &dbutil::get_infodb_file_path($self->{'infodbtype'}, "archiveinf-src", $archivedir);
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257 | my $archive_info = new arcinfo ($self->{'infodbtype'});
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258 | $archive_info->load_info ($arcinfo_doc_filename);
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259 |
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260 | #my $started_from_scratch = &FileUtils::fileTest($self->{'oaidb_tmp_filepath'}, '-z'); # 1 if tmpdb is empty
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261 | # -z test for file is empty http://www.perlmonks.org/?node_id=927447
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262 |
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263 | # load the oaidb file's contents into memory.
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264 | $self->load_info();
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265 | $self->print_info(); # DEBUGGING
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266 |
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267 | # process all the index, reindex and delete operations as indicated in arcinfo,
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268 | # all the while ensuring all PDs are changed back to E for OIDs that exist in both arcinfo and oaiinfo db.
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269 |
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270 | my $arcinfo_map = $archive_info->{'info'};
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271 |
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272 | foreach my $OID (keys %$arcinfo_map) {
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273 | my $arcinf_tuple = $archive_info->{'info'}->{$OID};
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274 | my $indexing_status = $arcinf_tuple->[arcinfo::INFO_STATUS_INDEX];
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275 | # use packageName::constant to refer to constants declared in another package,
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276 | # see http://perldoc.perl.org/constant.html
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277 |
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278 | print STDERR "######## OID: $OID - status: $indexing_status\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
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279 |
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280 | if($indexing_status eq "I") {
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281 | $self->index($OID); # add new as E with current timestamp/or set existing as E with orig timestamp
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282 | } elsif($indexing_status eq "R") {
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283 | $self->reindex($OID); # update timestamp and ensure marked as E (if oid doesn't exist, add new)
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284 | } elsif($indexing_status eq "D") {
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285 | $self->delete($OID); # set as D with current timestamp
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286 | } elsif($indexing_status eq "B") { # B for "been indexed"
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287 | $self->been_indexed($OID); # will flip any PD to E if oid exists, else will add new entry for oid
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288 | # A new entry may be required if the collection had been built prior to turning this into
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289 | # an oaicollection. But what if we always maintain an oaidb? Still call $self->index() here.
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290 | } else {
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291 | if ($self->{'verbosity'} >= $self->{'verbosity_threshold'}) {
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292 | print STDERR "### oaiinfo::building_stage_before_indexing(): Unrecognised indexing status $indexing_status\n";
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293 | }
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294 | }
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295 | }
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296 |
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297 | # once all docs processed, go through oaiiinfo db changing any PDs to D along with current timestamp
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298 | # to indicate that they're deleted
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299 | $self->mark_all_provisionallydeleted_as_deleted();
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300 | $self->print_info();
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301 |
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302 | # let's save to db file now that we're done
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303 | $self->save_info();
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304 |
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305 | }
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306 |
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307 | sub activate_collection { # move tmp db to live db
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308 | my $self = shift (@_);
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309 |
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310 | my $oaidb_live_filepath = $self->{'oaidb_live_filepath'};
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311 | my $oaidb_tmp_filepath = $self->{'oaidb_tmp_filepath'};
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312 |
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313 | my $livedb_exists = &FileUtils::fileExists($oaidb_live_filepath);
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314 | my $tmpdb_exists = &FileUtils::fileExists($oaidb_tmp_filepath);
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315 |
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316 | if($tmpdb_exists) {
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317 | if($livedb_exists) {
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318 | #&dbutil::remove_db_file($self->{'infodbtype'}, $oaidb_live_filepath); # remove the db file and any assoc files
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319 | &dbutil::rename_db_file_to($self->{'infodbtype'}, $oaidb_live_filepath, $oaidb_live_filepath.".bak"); # rename the db file and any assoc files
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320 | }
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321 | #&FileUtils::moveFiles($oaidb_tmp_filepath, $oaidb_live_filepath);
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322 | &dbutil::rename_db_file_to($self->{'infodbtype'}, $oaidb_tmp_filepath, $oaidb_live_filepath); # rename the db file and any assoc files
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323 |
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324 | if ($self->{'verbosity'} >= $self->{'verbosity_threshold'}) {
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325 | print STDERR "#### Should now have MOVED $self->{'oaidb_tmp_filepath'} to $self->{'oaidb_live_filepath'}\n";
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326 | }
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327 |
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328 | } else {
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329 | if ($self->{'verbosity'} >= $self->{'verbosity_threshold'}) {
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330 | print STDERR "@@@@@ In oaiinfo::activate_collection():\n";
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331 | print STDERR "@@@@@ No tmpdb at $self->{'oaidb_tmp_filepath'}\n";
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332 | print STDERR "@@@@@ to make 'live' by moving to $self->{'oaidb_live_filepath'}.\n";
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333 | }
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334 | }
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335 | }
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336 |
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337 | ##################### SPECIFIC TO PD-STEP ####################
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338 |
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339 |
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340 | # mark all existing, E (non-deleted) OIDs as Provisionally Deleted (PD)
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341 | # this subroutine doesn't save to oai-inf.DB
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342 | # the caller should call save_info when they want to save to the db
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343 | sub mark_all_existing_as_provisionallydeleted {
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344 | my $self = shift (@_);
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345 |
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346 | print STDERR "@@@@@ oaiinfo::mark_all_E_as_PD(): Marking the E entries as PD\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
|
---|
347 |
|
---|
348 | my $infomap = $self->{'info'};
|
---|
349 |
|
---|
350 | foreach my $OID (keys %$infomap) { # Mac Mountain Lion wants %$map, won't accept %$self->{'info'}
|
---|
351 | my $OID_info = $self->{'info'}->{$OID};
|
---|
352 | my $curr_status = $OID_info->[INFO_STATUS_INDEX];
|
---|
353 | if($curr_status eq "E") {
|
---|
354 | $OID_info->[INFO_STATUS_INDEX] = "PD";
|
---|
355 | }
|
---|
356 | }
|
---|
357 | }
|
---|
358 |
|
---|
359 | # mark all OIDs that are Provisionally Deleted (PD) as deleted, and set to current timestamp
|
---|
360 | # To be called at end of build. Again, the caller should save to DB by calling save_info.
|
---|
361 | sub mark_all_provisionallydeleted_as_deleted {
|
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362 | my $self = shift (@_);
|
---|
363 |
|
---|
364 | print STDERR "@@@@@ oaiinfo::mark_all_PD_as_D(): Marking the PD entries as D\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
|
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365 |
|
---|
366 | my $infomap = $self->{'info'};
|
---|
367 |
|
---|
368 | foreach my $OID (keys %$infomap) {
|
---|
369 | my $OID_info = $self->{'info'}->{$OID};
|
---|
370 | my $curr_status = $OID_info->[INFO_STATUS_INDEX];
|
---|
371 | if($curr_status eq "PD") {
|
---|
372 | $self->set_info($OID, "D", $self->get_current_time());
|
---|
373 | }
|
---|
374 | }
|
---|
375 | }
|
---|
376 |
|
---|
377 |
|
---|
378 | ##################### GENERAL, NOT SPECIFIC TO PD-STEP ####################
|
---|
379 |
|
---|
380 | sub print_info {
|
---|
381 | my $self = shift (@_);
|
---|
382 |
|
---|
383 | if ($self->{'verbosity'} < $self->{'verbosity_threshold'}) {
|
---|
384 | return;
|
---|
385 | }
|
---|
386 |
|
---|
387 | print STDERR "###########################################################\n";
|
---|
388 | print STDERR "@@@@@ oaiinfo::print_info(): oaidb in memory contains: \n";
|
---|
389 |
|
---|
390 | my $infomap = $self->{'info'};
|
---|
391 |
|
---|
392 | foreach my $OID (keys %$infomap) {
|
---|
393 | print STDERR "OID: $OID";
|
---|
394 | print STDERR " status: " . $self->{'info'}->{$OID}->[INFO_STATUS_INDEX];
|
---|
395 | print STDERR " time: " . $self->{'info'}->{$OID}->[INFO_TIMESTAMP_INDEX];
|
---|
396 | print STDERR " date: " . $self->{'info'}->{$OID}->[INFO_DATESTAMP_INDEX];
|
---|
397 | print STDERR "\n";
|
---|
398 | }
|
---|
399 |
|
---|
400 | print STDERR "###########################################################\n";
|
---|
401 | }
|
---|
402 |
|
---|
403 |
|
---|
404 | # When a fresh oai-inf.db is created, this method is called to add the db's special
|
---|
405 | # record representing the collection's earliest timestamp.
|
---|
406 | # OID=$OID_EARLIEST_TIMESTAMP, deletion_status=NA for not applicable, and current timestamp/date.
|
---|
407 | # For older oai-inf.db's that don't yet have this record, a record will be added too,
|
---|
408 | # but with the timestamp set to the oldest last modified date for the collection's docs.
|
---|
409 | sub insert_coll_earliest_timestamp {
|
---|
410 | my $self = shift (@_);
|
---|
411 | my ($is_new_db) = @_;
|
---|
412 |
|
---|
413 | my $current_time = $self->get_current_time();
|
---|
414 | my $save_to_db = 0;
|
---|
415 |
|
---|
416 |
|
---|
417 | print STDERR "@@@@@ oaiinfo::insert_coll_earliest_timestamp(): " if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
|
---|
418 |
|
---|
419 | if($is_new_db) {
|
---|
420 |
|
---|
421 | print STDERR "New db. Setting timestamp of oai-inf.db creation.\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
|
---|
422 |
|
---|
423 | $self->set_info($OID_EARLIEST_TIMESTAMP, "NA", $current_time);
|
---|
424 | $save_to_db = 1;
|
---|
425 | }
|
---|
426 |
|
---|
427 | else { # oai-inf.db already exists, ensure it has an [$OID_EARLIEST_TIMESTAMP] set
|
---|
428 |
|
---|
429 | my $earliesttimestamp_record = $self->{'info'}->{$OID_EARLIEST_TIMESTAMP};
|
---|
430 |
|
---|
431 | if (!defined $earliesttimestamp_record) {
|
---|
432 | # oai-inf.db exists, but doesn't contain an [$OID_EARLIEST_TIMESTAMP] record yet.
|
---|
433 | # Let's create one for it:
|
---|
434 | # Work out the earliest lastmodified datetime in the collection, by inspecting
|
---|
435 | # the last modified timestamp for each doc in the collection
|
---|
436 |
|
---|
437 | my $earliest_timestamp = $current_time;
|
---|
438 |
|
---|
439 | my $infomap = $self->{'info'}; # Mac Mountain Lion wants %$map, won't accept %$self->{'info'}
|
---|
440 | foreach my $OID (keys %$infomap) {
|
---|
441 | my $OID_info = $self->{'info'}->{$OID};
|
---|
442 | my $lastmodified = $OID_info->[INFO_TIMESTAMP_INDEX];
|
---|
443 | if($lastmodified < $earliest_timestamp) {
|
---|
444 | $earliest_timestamp = $lastmodified;
|
---|
445 | }
|
---|
446 | }
|
---|
447 |
|
---|
448 | print STDERR "Collection timestamp not yet set for $OID_EARLIEST_TIMESTAMP. Setting to earliest found: $earliest_timestamp\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
|
---|
449 |
|
---|
450 | $self->set_info($OID_EARLIEST_TIMESTAMP, "NA", $earliest_timestamp);
|
---|
451 | $save_to_db = 1;
|
---|
452 | } else {
|
---|
453 | print STDERR "Collection timestamp was already set\n" if $self->{'verbosity'} >= $self->{'verbosity_threshold'};
|
---|
454 | }
|
---|
455 | }
|
---|
456 |
|
---|
457 | return $save_to_db;
|
---|
458 | }
|
---|
459 |
|
---|
460 |
|
---|
461 | # Find the OID, if it exists, make its status=E for existing. Leave its timestamp alone.
|
---|
462 | # If the OID doesn't yet exist, add it as a new entry with status=E and with current timestamp.
|
---|
463 | sub index { # Add a new oid with current time and E. If the oid was already present, mark as E
|
---|
464 | my $self = shift (@_);
|
---|
465 | my ($OID) = @_;
|
---|
466 |
|
---|
467 | my $OID_info = $self->{'info'}->{$OID};
|
---|
468 |
|
---|
469 | if (defined $OID_info) { # if OID is present, this will change status back to E, timestamp unchanged
|
---|
470 | $OID_info->[INFO_STATUS_INDEX] = "E";
|
---|
471 |
|
---|
472 | } else { # if OID is not present, then it's now added as existing from current time on
|
---|
473 | $self->set_info($OID, "E", $self->get_current_time());
|
---|
474 | }
|
---|
475 | }
|
---|
476 |
|
---|
477 | # Upon reindexing a document with identifier OID, change its timestamp to current time
|
---|
478 | # if a new OID, then add as new entry with status=E and current timestamp
|
---|
479 | sub reindex { # update timestamp if oid is already present, if not (unlikely), add as new
|
---|
480 | my $self = shift (@_);
|
---|
481 | my ($OID) = @_;
|
---|
482 |
|
---|
483 | my $OID_info = $self->{'info'}->{$OID};
|
---|
484 | $self->set_info($OID, "E", $self->get_current_time()); # Takes care of 3 things:
|
---|
485 | # if OID exists, updates modified time to indicate the doc has been reindexed
|
---|
486 | # if OID exists, ensures any status=PD is flipped back to E for this OID doc (as we know it exists);
|
---|
487 | # if the OID doesn't yet exist, adds a new OID entry with status=E and current timestamp.
|
---|
488 |
|
---|
489 | }
|
---|
490 |
|
---|
491 | # Does the same as index():
|
---|
492 | # OIDs that have been indexed upon rebuild may still be new to the oaidb: GS2 collections
|
---|
493 | # are not OAI collections by default, unlike GS3 collections. Imagine rebuilding a (GS2) collection
|
---|
494 | # 5 times and then setting them to be an OAI collection. In that case, the doc OIDs in the collection
|
---|
495 | # may not be in the oaidb yet. Unless, we decide (as is the present case) to always maintain an oaidb
|
---|
496 | # (always creating an oaidb regardless of whether the collection has OAI support turned on or not).
|
---|
497 | sub been_indexed {
|
---|
498 | my $self = shift (@_);
|
---|
499 | my ($OID) = @_;
|
---|
500 |
|
---|
501 | $self->index($OID);
|
---|
502 | }
|
---|
503 |
|
---|
504 | # Upon deleting a document with identifier OID,
|
---|
505 | # set status to deleted and change its timestamp to current time
|
---|
506 | sub delete {
|
---|
507 | my $self = shift (@_);
|
---|
508 | my ($OID) = @_;
|
---|
509 |
|
---|
510 | # the following method will set to current time if no timestamp provided,
|
---|
511 | # But by being explicit here, the code is easier to follow
|
---|
512 | $self->set_info($OID, "D", $self->get_current_time());
|
---|
513 |
|
---|
514 | }
|
---|
515 |
|
---|
516 | #############################################################
|
---|
517 | sub get_current_time {
|
---|
518 | my $self = shift (@_);
|
---|
519 | return time; # current time
|
---|
520 |
|
---|
521 | # localtime(time) returns an array of values (day, month, year, hour, min, seconds) or singular string
|
---|
522 | # return localtime; # same as localtime(time); # http://perldoc.perl.org/functions/localtime.html
|
---|
523 |
|
---|
524 | }
|
---|
525 |
|
---|
526 | sub get_datestamp {
|
---|
527 | my $self = shift (@_);
|
---|
528 | my ($timestamp) = @_;
|
---|
529 |
|
---|
530 | my ($seconds, $minutes, $hours, $day_of_month, $month, $year,
|
---|
531 | $wday, $yday, $isdst) = localtime($timestamp);
|
---|
532 |
|
---|
533 | my $datestamp = sprintf("%d%02d%02d",1900+$year,$month+1,$day_of_month);
|
---|
534 |
|
---|
535 | return $datestamp;
|
---|
536 | }
|
---|
537 |
|
---|
538 | sub _load_info_txt
|
---|
539 | {
|
---|
540 | my $self = shift (@_);
|
---|
541 | my ($filename) = @_;
|
---|
542 |
|
---|
543 | if (defined $filename && &FileUtils::fileExists($filename)) {
|
---|
544 | open (INFILE, $filename) ||
|
---|
545 | die "oaiinfo::load_info couldn't read $filename\n";
|
---|
546 |
|
---|
547 | my ($line, @lineparts);
|
---|
548 | while (defined ($line = <INFILE>)) {
|
---|
549 | $line =~ s/\cM|\cJ//g; # remove end-of-line characters
|
---|
550 | @lineparts = split ("\t", $line);
|
---|
551 | if (scalar(@lineparts) >= 2) {
|
---|
552 | $self->set_info (@lineparts);
|
---|
553 | }
|
---|
554 | }
|
---|
555 | close (INFILE);
|
---|
556 | }
|
---|
557 |
|
---|
558 | }
|
---|
559 |
|
---|
560 | sub _load_info_db
|
---|
561 | {
|
---|
562 | my $self = shift (@_);
|
---|
563 | my ($filename) = @_;
|
---|
564 |
|
---|
565 | my $infodb_map = {};
|
---|
566 |
|
---|
567 | &dbutil::read_infodb_file($self->{'infodbtype'}, $filename, $infodb_map);
|
---|
568 |
|
---|
569 | foreach my $oid ( keys %$infodb_map ) {
|
---|
570 | my $vals = $infodb_map->{$oid};
|
---|
571 | # interested in oid, timestamp, deletion status
|
---|
572 |
|
---|
573 | my ($deletion_status) = ($vals=~/^<status>(.*)$/m);
|
---|
574 | my ($timestamp) = ($vals=~/^<timestamp>(.*)$/m);
|
---|
575 | my ($datestamp) = ($vals=~/^<datestamp>(.*)$/m);
|
---|
576 |
|
---|
577 | $self->add_info ($oid, $deletion_status, $timestamp, $datestamp);
|
---|
578 | }
|
---|
579 | }
|
---|
580 |
|
---|
581 | # if no filename is passed in (and you don't generally want to), then
|
---|
582 | # it tries to load in <collection>/etc/oai-inf.<db> if it exists
|
---|
583 | sub load_info {
|
---|
584 | my $self = shift (@_);
|
---|
585 | my ($filename) = @_;
|
---|
586 |
|
---|
587 | $self->{'info'} = {};
|
---|
588 |
|
---|
589 | $filename = $self->{'oaidb_file_path'} unless defined $filename;
|
---|
590 |
|
---|
591 | if (&FileUtils::fileExists($filename)) {
|
---|
592 | if ($filename =~ m/\.inf$/) {
|
---|
593 | $self->_load_info_txt($filename);
|
---|
594 | }
|
---|
595 | else {
|
---|
596 | $self->_load_info_db($filename);
|
---|
597 | }
|
---|
598 | }
|
---|
599 |
|
---|
600 | }
|
---|
601 |
|
---|
602 | sub _save_info_txt {
|
---|
603 | my $self = shift (@_);
|
---|
604 | my ($filename) = @_;
|
---|
605 |
|
---|
606 | my ($OID, $info);
|
---|
607 |
|
---|
608 | open (OUTFILE, ">$filename") ||
|
---|
609 | die "oaiinfo::save_info couldn't write $filename\n";
|
---|
610 |
|
---|
611 | foreach $info (@{$self->get_OID_list()}) {
|
---|
612 | if (defined $info) {
|
---|
613 | print OUTFILE join("\t", @$info), "\n";
|
---|
614 | }
|
---|
615 | }
|
---|
616 | close (OUTFILE);
|
---|
617 | }
|
---|
618 |
|
---|
619 | # if no filename is passed in (and you don't generally want to), then
|
---|
620 | # this subroutine tries to write to <collection>/etc/oai-inf.<db>.
|
---|
621 | sub _save_info_db {
|
---|
622 | my $self = shift (@_);
|
---|
623 | my ($filename) = @_;
|
---|
624 |
|
---|
625 | $filename = $self->{'oaidb_file_path'} unless defined $filename;
|
---|
626 | my $infodbtype = $self->{'infodbtype'};
|
---|
627 |
|
---|
628 | # write out again. Open file for overwriting, not appending.
|
---|
629 | # Then write out data structure $self->{'info'} that has been maintaining the data in-memory.
|
---|
630 | my $infodb_handle = &dbutil::open_infodb_write_handle($infodbtype, $filename);
|
---|
631 |
|
---|
632 | my $infomap = $self->{'info'};
|
---|
633 | foreach my $oid ( keys %$infomap ) {
|
---|
634 | my $OID_info = $self->{'info'}->{$oid};
|
---|
635 | my $val = "<status>".$OID_info->[INFO_STATUS_INDEX];
|
---|
636 | $val .= "\n<timestamp>".$OID_info->[INFO_TIMESTAMP_INDEX];
|
---|
637 | $val .= "\n<datestamp>".$OID_info->[INFO_DATESTAMP_INDEX]."\n";
|
---|
638 | &dbutil::write_infodb_rawentry($infodbtype,$infodb_handle,$oid,$val);
|
---|
639 | }
|
---|
640 | &dbutil::close_infodb_write_handle($infodbtype, $infodb_handle);
|
---|
641 | }
|
---|
642 |
|
---|
643 | sub save_info {
|
---|
644 | my $self = shift (@_);
|
---|
645 | my ($filename) = @_;
|
---|
646 |
|
---|
647 | if(defined $filename) {
|
---|
648 | if ($filename =~ m/(contents)|(\.inf)$/) {
|
---|
649 | $self->_save_info_txt($filename);
|
---|
650 | }
|
---|
651 | else {
|
---|
652 | $self->_save_info_db($filename);
|
---|
653 | }
|
---|
654 | } else {
|
---|
655 | $self->_save_info_db();
|
---|
656 | }
|
---|
657 | }
|
---|
658 |
|
---|
659 |
|
---|
660 | sub set_info { # sets existing or appends
|
---|
661 | my $self = shift (@_);
|
---|
662 | my ($OID, $del_status, $timestamp) = @_;
|
---|
663 |
|
---|
664 | if(!defined $timestamp) { # get current date timestamp
|
---|
665 | $timestamp = $self->get_current_time();
|
---|
666 | }
|
---|
667 | my $datestamp = $self->get_datestamp($timestamp);
|
---|
668 |
|
---|
669 | $self->{'info'}->{$OID} = [$del_status, $timestamp, $datestamp];
|
---|
670 |
|
---|
671 | }
|
---|
672 |
|
---|
673 | sub add_info { # called to load a single record from file into memory, so it should be provided all 4 fields
|
---|
674 | my $self = shift (@_);
|
---|
675 | my ($OID, $del_status, $timestamp, $datestamp) = @_;
|
---|
676 |
|
---|
677 | $self->{'info'}->{$OID} = [$del_status, $timestamp, $datestamp];
|
---|
678 | }
|
---|
679 |
|
---|
680 |
|
---|
681 | # returns a list of the form [[OID, deletion_status, timestamp, datestamp], ...]
|
---|
682 | sub get_OID_list
|
---|
683 | {
|
---|
684 | my $self = shift (@_);
|
---|
685 |
|
---|
686 | my @list = ();
|
---|
687 |
|
---|
688 | my $infomap = $self->{'info'};
|
---|
689 | foreach my $OID (keys %$infomap) {
|
---|
690 | my $OID_info = $self->{'info'}->{$OID};
|
---|
691 |
|
---|
692 | push (@list, [$OID, $OID_info->[INFO_STATUS_INDEX],
|
---|
693 | $OID_info->[INFO_TIMESTAMP_INDEX],
|
---|
694 | $OID_info->[INFO_DATESTAMP_INDEX]
|
---|
695 | ]);
|
---|
696 | }
|
---|
697 |
|
---|
698 | return \@list;
|
---|
699 | }
|
---|
700 |
|
---|
701 |
|
---|
702 | # returns the number of entries so far, including deleted ones
|
---|
703 | # http://stackoverflow.com/questions/1109095/how-can-i-find-the-number-of-keys-in-a-hash-in-perl
|
---|
704 | sub size {
|
---|
705 | my $self = shift (@_);
|
---|
706 | my $infomap = $self->{'info'};
|
---|
707 | return (scalar keys %$infomap);
|
---|
708 | }
|
---|
709 |
|
---|
710 | 1;
|
---|