Bug 403834: Replace table locks with database transactions in tokens, votes, and…

sanitycheck.cgi

@@ -106,7 +106,7 @@ unless ($user->in_group('editcomponents')) {
 
 if ($cgi->param('rebuildvotecache')) {
     Status('vote_cache_rebuild_start');
-    $dbh->bz_lock_tables('bugs WRITE', 'votes READ');
+    $dbh->bz_start_transaction();
     $dbh->do(q{UPDATE bugs SET votes = 0});
     my $sth_update = $dbh->prepare(q{UPDATE bugs 
                                         SET votes = ? 
@@ -117,7 +117,7 @@ if ($cgi->param('rebuildvotecache')) {
     while (my ($id, $v) = $sth->fetchrow_array) {
         $sth_update->execute($v, $id);
     }
-    $dbh->bz_unlock_tables();
+    $dbh->bz_commit_transaction();
     Status('vote_cache_rebuild_end');
 }
 
@@ -262,11 +262,7 @@ if ($cgi->param('rescanallBugMail')) {
 if ($cgi->param('remove_invalid_bug_references')) {
     Status('bug_reference_deletion_start');
 
-    $dbh->bz_lock_tables('attachments WRITE', 'bug_group_map WRITE',
-                         'bugs_activity WRITE', 'cc WRITE',
-                         'dependencies WRITE', 'duplicates WRITE',
-                         'flags WRITE', 'keywords WRITE',
-                         'longdescs WRITE', 'votes WRITE', 'bugs READ');
+    $dbh->bz_start_transaction();
 
     foreach my $pair ('attachments/', 'bug_group_map/', 'bugs_activity/', 'cc/',
                       'dependencies/blocked', 'dependencies/dependson',
@@ -286,7 +282,7 @@ if ($cgi->param('remove_invalid_bug_references')) {
         }
     }
 
-    $dbh->bz_unlock_tables();
+    $dbh->bz_commit_transaction();
     Status('bug_reference_deletion_end');
 }
 
@@ -297,7 +293,7 @@ if ($cgi->param('remove_invalid_bug_references')) {
 if ($cgi->param('remove_invalid_attach_references')) {
     Status('attachment_reference_deletion_start');
 
-    $dbh->bz_lock_tables('attachments WRITE', 'attach_data WRITE');
+    $dbh->bz_start_transaction();
 
     my $attach_ids =
         $dbh->selectcol_arrayref('SELECT attach_data.id
@@ -311,7 +307,7 @@ if ($cgi->param('remove_invalid_attach_references')) {
                  join(',', @$attach_ids) . ')');
     }
 
-    $dbh->bz_unlock_tables();
+    $dbh->bz_commit_transaction();
     Status('attachment_reference_deletion_end');
 }
 
@@ -698,7 +694,7 @@ sub _check_keywords {
     Status('keyword_cache_start');
 
     if ($cgi->param('rebuildkeywordcache')) {
-        $dbh->bz_lock_tables('bugs write', 'keywords read', 'keyworddefs read');
+        $dbh->bz_start_transaction();
     }
 
     my $query = q{SELECT keywords.bug_id, keyworddefs.name
@@ -765,7 +761,7 @@ sub _check_keywords {
     }
 
     if ($cgi->param('rebuildkeywordcache')) {
-        $dbh->bz_unlock_tables();
+        $dbh->bz_commit_transaction();
     }
 }
 
@@ -804,10 +800,8 @@ if (scalar(@invalid_flags)) {
     if ($cgi->param('remove_invalid_flags')) {
         Status('flag_deletion_start');
         my @flag_ids = map {$_->[0]} @invalid_flags;
-        $dbh->bz_lock_tables('flags WRITE');
         # Silently delete these flags, with no notification to requesters/setters.
         $dbh->do('DELETE FROM flags WHERE id IN (' . join(',', @flag_ids) .')');
-        $dbh->bz_unlock_tables();
         Status('flag_deletion_end');
     }
     else {

token.cgi

@@ -215,13 +215,13 @@ sub changePassword {
     
     # Update the user's password in the profiles table and delete the token
     # from the tokens table.
-    $dbh->bz_lock_tables('profiles WRITE', 'tokens WRITE');
+    $dbh->bz_start_transaction();
     $dbh->do(q{UPDATE   profiles
                SET      cryptpassword = ?
                WHERE    userid = ?},
              undef, ($cryptedpassword, $userid) );
     $dbh->do('DELETE FROM tokens WHERE token = ?', undef, $::token);
-    $dbh->bz_unlock_tables();
+    $dbh->bz_commit_transaction();
 
     Bugzilla->logout_user_by_id($userid);
 
@@ -265,7 +265,7 @@ sub changeEmail {
 
     # Update the user's login name in the profiles table and delete the token
     # from the tokens table.
-    $dbh->bz_lock_tables('profiles WRITE', 'tokens WRITE');
+    $dbh->bz_start_transaction();
     $dbh->do(q{UPDATE   profiles
                SET      login_name = ?
                WHERE    userid = ?},
@@ -273,7 +273,7 @@ sub changeEmail {
     $dbh->do('DELETE FROM tokens WHERE token = ?', undef, $::token);
     $dbh->do(q{DELETE FROM tokens WHERE userid = ?
                AND tokentype = 'emailnew'}, undef, $userid);
-    $dbh->bz_unlock_tables();
+    $dbh->bz_commit_transaction();
 
     # The email address has been changed, so we need to rederive the groups
     my $user = new Bugzilla::User($userid);
@@ -308,12 +308,10 @@ sub cancelChangeEmail {
         
         # check to see if it has been altered
         if($actualemail ne $old_email) {
-            $dbh->bz_lock_tables('profiles WRITE');
             $dbh->do(q{UPDATE   profiles
                        SET      login_name = ?
                        WHERE    userid = ?},
                      undef, ($old_email, $userid));
-            $dbh->bz_unlock_tables();
 
             # email has changed, so rederive groups
             # Note that this is done _after_ the tables are unlocked
@@ -335,11 +333,9 @@ sub cancelChangeEmail {
     $vars->{'new_email'} = $new_email;
     Bugzilla::Token::Cancel($::token, $vars->{'message'}, $vars);
 
-    $dbh->bz_lock_tables('tokens WRITE');
     $dbh->do(q{DELETE FROM tokens WHERE userid = ?
                AND tokentype = 'emailold' OR tokentype = 'emailnew'},
              undef, $userid);
-    $dbh->bz_unlock_tables();
 
     # Return HTTP response headers.
     print $cgi->header();

votes.cgi

@@ -294,9 +294,7 @@ sub record_votes {
     # for products that only allow one vote per bug).  In that case, we still
     # need to clear the user's votes from the database.
     my %affected;
-    $dbh->bz_lock_tables('bugs WRITE', 'bugs_activity WRITE',
-                         'votes WRITE', 'longdescs WRITE',
-                         'products READ', 'fielddefs READ');
+    $dbh->bz_start_transaction();
     
     # Take note of, and delete the user's old votes from the database.
     my $bug_list = $dbh->selectcol_arrayref('SELECT bug_id FROM votes
@@ -335,7 +333,7 @@ sub record_votes {
         my $confirmed = CheckIfVotedConfirmed($id, $who);
         push (@updated_bugs, $id) if $confirmed;
     }
-    $dbh->bz_unlock_tables();
+    $dbh->bz_commit_transaction();
 
     $vars->{'type'} = "votes";
     $vars->{'mailrecipients'} = { 'changer' => Bugzilla->user->login };