Annotation of loncom/debugging_tools/rebuild_db_from_hist.pl, revision 1.6
1.1 matthew 1: #!/usr/bin/perl -w
2: #
3: # The LearningOnline Network
4: #
5: # rebuild_db_from_hist.pl Rebuild a *.db file from a *.hist file
6: #
1.6 ! albertel 7: # $Id: rebuild_db_from_hist.pl,v 1.5 2006/08/03 17:27:48 albertel Exp $
1.1 matthew 8: #
9: # Copyright Michigan State University Board of Trustees
10: #
11: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
12: #
13: # LON-CAPA is free software; you can redistribute it and/or modify
14: # it under the terms of the GNU General Public License as published by
15: # the Free Software Foundation; either version 2 of the License, or
16: # (at your option) any later version.
17: #
18: # LON-CAPA is distributed in the hope that it will be useful,
19: # but WITHOUT ANY WARRANTY; without even the implied warranty of
20: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21: # GNU General Public License for more details.
22: #
23: # You should have received a copy of the GNU General Public License
24: # along with LON-CAPA; if not, write to the Free Software
25: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26: #
27: # /home/httpd/html/adm/gpl.txt
28: #
29: # http://www.lon-capa.org/
30: #
31: #################################################
32: use strict;
1.5 albertel 33: use lib '/home/httpd/lib/perl';
1.1 matthew 34: use Getopt::Long;
35: use GDBM_File;
1.5 albertel 36: use LONCAPA;
37: use Apache::lonnet;
1.1 matthew 38:
39: #
40: # Options
1.6 ! albertel 41: my ($help,$debug,$test,$test_db,$p_is_s);
! 42: GetOptions("help" => \$help,
! 43: "debug" => \$debug,
! 44: "test" => \$test,
! 45: "create_test_db" => \$test_db,
! 46: "p_is_s" => \$p_is_s);
1.1 matthew 47:
48: if (! defined($debug)) { $debug = 0; }
49: if (! defined($test)) { $test = 0; }
50:
51: #
52: # Help them out if they ask for it
53: if ($help) {
54: print <<'END';
55: rebuild_db_from_hist.pl - recreate a db file from a hist file.
56: Options:
57: -help Display this help.
1.2 matthew 58: -debug Output debugging code (not much is output yet)
59: -test Verify the given *.hist file will reconstruct the current db file
60: Sends error messages to STDERR.
1.6 ! albertel 61: -create_test_db
! 62: when testing also create a *.db.test db of the testing info
1.4 matthew 63: -p_is_s Treat 'P' lines as 'S' lines.
1.1 matthew 64: Examples:
1.2 matthew 65: rebuild_db_from_hist.pl -t $file.hist # Perform a test rebuild
66: rebuild_db_from_hist.pl $file.hist
1.1 matthew 67: END
68: exit;
69: }
70:
71: #
72: # Loop through ARGV getting files.
73: while (my $fname = shift) {
1.5 albertel 74: if ($fname !~ m/\.hist$/) {
75: print("error: $fname is not a hist file");
76: next;
77: }
78:
1.1 matthew 79: my $db_filename = $fname;
80: $db_filename =~ s/\.hist$/\.db/;
81: if (-e $db_filename && ! $test) {
1.6 ! albertel 82: print STDERR "Aborting: The target file $db_filename exists.".$/;
1.1 matthew 83: next;
84: }
1.3 matthew 85: my ($error,$constructed_hash) = &process_file($fname,$db_filename,$debug);
1.5 albertel 86: if (! defined($error) ) {
87: $error = &update_hash($db_filename,$constructed_hash);
88: }
1.1 matthew 89: if (! defined($error) || ! $test) {
90: $error = &write_hash($db_filename,$constructed_hash);
91: }
1.6 ! albertel 92: if ($test && $test_db) {
1.5 albertel 93: $error = &write_hash($db_filename.'.test',$constructed_hash);
94: }
95: if ($test) {
1.1 matthew 96: my $error = &test_hash($db_filename,$constructed_hash);
97: if (defined($error)) {
98: print "Error processing ".$fname.$/;
1.6 ! albertel 99: print STDERR $error;
1.1 matthew 100: } else {
101: print "Everything looks good for ".$fname.$/;
102: }
103: }
104: if (defined($error)) {
105: print $error.$/;
106: }
107: }
108:
109: exit;
110:
111: ######################################################
112: ######################################################
113: sub process_file {
114: my ($fname,$db_filename,$debug) = @_;
115: #
116: open(HISTFILE,$fname);
117: my %db_to_store;
118: my $no_action_count = 0;
119: while (my $command = <HISTFILE>) {
120: chomp($command);
121: my $error = undef;
122: # Each line can begin with:
123: # P:put
1.5 albertel 124: # S:store
1.1 matthew 125: # D:delete
1.5 albertel 126: # N:new put (only adds tha values if they are all new values)
1.6 ! albertel 127: # M:modify the values for a previous S
1.1 matthew 128: my ($action,$time,$concatenated_data) = split(':',$command,3);
1.3 matthew 129: if ($fname eq 'roles.hist' && $concatenated_data =~ /^.*:.*:/) {
130: (undef,undef,$concatenated_data) = split(':',$concatenated_data,3);
131: }
1.4 matthew 132: next if (! defined($action));
133: if ($action eq 'P' && $p_is_s) { $action = 'S'; }
1.6 ! albertel 134: my ($rid,@allkeys,$version);
1.4 matthew 135: if ($action eq 'S') {
136: ($rid,$concatenated_data) = split(':',$concatenated_data,2);
137: $version = ++$db_to_store{"version:$rid"};
1.5 albertel 138: #print $version.$/;
1.4 matthew 139: }
1.6 ! albertel 140: if ($action eq 'M') {
! 141: ($rid,$version,$concatenated_data) =
! 142: split(':',$concatenated_data,3);
! 143: }
1.4 matthew 144: next if (! defined($concatenated_data));
1.5 albertel 145: my $add_new_data = 1;
1.1 matthew 146: my @data = split('&',$concatenated_data);
147: foreach my $k_v_pair (@data) {
148: my ($key,$value) = split('=',$k_v_pair,2);
149: if (defined($action) && $action eq 'P') {
150: if (defined($value)) {
151: $db_to_store{$key}=$value;
152: } else {
153: $no_action_count++;
154: }
1.6 ! albertel 155: } elsif ($action eq 'S' || $action eq 'M') {
1.4 matthew 156: # Versioning of data, so we update the old ata
1.6 ! albertel 157: push(@allkeys,$key);
1.4 matthew 158: $db_to_store{"$version:$rid:$key"}=$value;
1.5 albertel 159: } elsif ($action eq 'N') {
160: if (exists($db_to_store{$key})) {
161: $add_new_data = 0;
162: print "exists $key\n";
163: }
1.1 matthew 164: } elsif ($action eq 'D') {
165: delete($db_to_store{$key});
166: } else {
167: $error = "Unable to understand action '".$action."'";
168: }
169: }
1.6 ! albertel 170:
1.5 albertel 171: if ($action eq 'N' && $add_new_data) {
172: foreach my $k_v_pair (@data) {
173: my ($key,$value) = split('=',$k_v_pair,2);
174: $db_to_store{$key}=$value;
175: }
176: }
1.6 ! albertel 177: if ($action eq 'S') {
1.4 matthew 178: $db_to_store{"$version:$rid:timestamp"}=$time;
1.6 ! albertel 179: push(@allkeys,'timestamp');
! 180: }
! 181: if ($action eq 'S' || $action eq 'M') {
! 182: $db_to_store{"$version:keys:$rid"}=join(':',@allkeys);
1.4 matthew 183: }
1.1 matthew 184: if (defined($error)) {
185: return ('Error:'.$error.$/,undef);
186: }
187: }
188: if ($no_action_count) {
189: print $no_action_count.' lines did not require action.'.$/;
190: }
191: close(HISTFILE);
192: return (undef,\%db_to_store);
193: }
194:
195: sub write_hash {
196: my ($db_filename,$db_to_store) = @_;
197: #
198: # Write the gdbm file
199: my %db;
200: if (! tie(%db,'GDBM_File',$db_filename,&GDBM_WRCREAT(),0640)) {
201: warn "Unable to tie to $db_filename";
202: return "Unable to tie to $db_filename";
203: }
204: #
205: while (my ($k,$v) = each(%$db_to_store)) {
206: $db{$k}=$v;
207: }
208: #
209: untie(%db);
210: return undef;
211: }
212:
213: sub test_hash {
214: my ($db_filename,$my_db) = @_;
215: #
216: my %db;
217: if (! tie(%db,'GDBM_File',$db_filename,&GDBM_READER(),0640)) {
218: return "Unable to tie to $db_filename";;
219: }
220: my (%key_errors,%value_errors);
221: while (my ($k,$v) = each(%db)) {
222: if (exists($my_db->{$k})) {
223: if ($my_db->{$k} eq $v) {
224: delete($my_db->{$k});
225: } else {
226: $value_errors{$k}=$v;
227: }
228: } else {
229: $key_errors{$k}=$v;
230: }
231: }
232: untie(%db);
233: #
234: my $error;
235: my $extra_count = scalar(keys(%$my_db));
236: if ($extra_count) {
1.4 matthew 237: $error.=$extra_count.' extra key/value pairs found in hist: '.$/;
1.1 matthew 238: while (my ($k,$v) = each(%$my_db)) {
1.5 albertel 239: $error .= ' "'.$k.'" => "'.$v.'"'.$/;
1.1 matthew 240: }
241: }
242: my $key_count = scalar(keys(%key_errors));
243: if ($key_count) {
1.4 matthew 244: $error.=$key_count.' missing keys found in db but not in hist: '.$/;
1.1 matthew 245: while (my ($k,$v) = each(%key_errors)) {
246: $error .= ' "'.$k.'" => "'.$v.'"'.$/;
247: }
248: }
249: my $value_count = scalar(keys(%value_errors));
250: if ($value_count) {
1.4 matthew 251: $error.=$value_count.' mismatched values found: '.$/;
1.1 matthew 252: while (my ($k,$v) = each(%value_errors)) {
253: $error .= ' "'.$k.'" => "'.$v.'"'.$/;
254: }
255: }
256: #
257: return $error;
258: }
1.5 albertel 259:
260: sub update_hash {
261: my ($db_filename,$my_db) = @_;
262: if ($db_filename=~
263: m/(gradingqueue|reviewqueue|slots|slot_reservations).db$/) {
264: &update_grading_queue($db_filename,$my_db);
265: }
266: }
267:
268: sub update_grading_queue {
269: my ($db_filename,$my_db) = @_;
270: my ($name) =
271: ($db_filename=~m/(gradingqueue|reviewqueue|slots|slot_reservations).db$/);
272: my $type='queue';
273: if ($name eq 'slots') {
274: $type = 'slots';
275: } elsif ($name eq 'slot_reservations') {
276: $type = 'reservation';
277: }
278: if ($type eq 'queue') {
279: foreach my $key (keys(%{$my_db})) {
280: my $real_key = &unescape($key);
281: my (@elements) = split("\0",$real_key);
282: if (exists($elements[2])) {
283: $elements[2] = &update_value($elements[2]);
284: }
285: $real_key = join("\0",@elements);
286: my $new_key = &escape($real_key);
287: if ($new_key ne $key) {
288: $my_db->{$new_key} = $my_db->{$key};
289: delete($my_db->{$key});
290: }
291: if ($new_key =~ /locked$/) {
292: my $value = $my_db->{$new_key};
293: my $new_value = &unescape($value);
294: $new_value = &update_value($new_value);
295: $my_db->{$new_key} = &escape($new_value);
296: }
297: }
298: } elsif ($type eq 'slots') {
299: foreach my $key (keys(%{$my_db})) {
300: my $value = $my_db->{$key};
301: $value = &Apache::lonnet::thaw_unescape($value);
302: if (exists($value->{'proctor'})) {
303: $value->{'proctor'} = &update_value($value->{'proctor'});
304: }
305: if (exists($value->{'allowedusers'})) {
306: $value->{'allowedusers'} =
307: &update_value($value->{'allowedusers'});
308: }
309: $my_db->{$key} = &Apache::lonnet::freeze_escape($value);
310: }
311: } elsif ($type eq 'reservation') {
312: foreach my $key (keys(%{$my_db})) {
313: my $value = $my_db->{$key};
314: $value = &Apache::lonnet::thaw_unescape($value);
315: if (exists($value->{'name'})) {
316: $value->{'name'} = &update_value($value->{'name'});
317: }
318: $my_db->{$key} = &Apache::lonnet::freeze_escape($value);
319: }
320: }
321: }
322:
323: sub update_value {
324: my ($value) = @_;
325: if ($value =~ /@/ && $value !~ /:/) {
326: $value =~ tr/@/:/;
327: }
328: return $value;
329: }
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