version 1.56, 2003/07/25 17:07:06
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version 1.62, 2004/06/08 22:09:44
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Line 41 Note that a lonsql.pid file contains the
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Line 41 Note that a lonsql.pid file contains the
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=head1 OVERVIEW |
=head1 OVERVIEW |
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The SQL database in LON-CAPA is used for catalog searches against |
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resource metadata only. The authoritative version of the resource |
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metadata is an XML-file on the normal file system (same file name as |
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resource plus ".meta"). The SQL-database is a cache of these files, |
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and can be reconstructed from the XML files at any time. |
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The current database is implemented assuming a non-adjustable |
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architecture involving these data fields (specific to each version of |
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a resource). |
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=over 4 |
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=item * title |
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=item * author |
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=item * subject |
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=item * notes |
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=item * abstract |
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=item * mime |
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=item * language |
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=item * creationdate |
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=item * lastrevisiondate |
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=item * owner |
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=item * copyright |
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=back |
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=head2 Purpose within LON-CAPA |
=head2 Purpose within LON-CAPA |
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LON-CAPA is meant to distribute A LOT of educational content to A LOT |
LON-CAPA is meant to distribute A LOT of educational content to A LOT |
Line 139 use strict;
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Line 103 use strict;
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use lib '/home/httpd/lib/perl/'; |
use lib '/home/httpd/lib/perl/'; |
use LONCAPA::Configuration; |
use LONCAPA::Configuration; |
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use LONCAPA::lonmetadata(); |
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use IO::Socket; |
use IO::Socket; |
use Symbol; |
use Symbol; |
Line 150 use Fcntl;
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Line 115 use Fcntl;
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use Tie::RefHash; |
use Tie::RefHash; |
use DBI; |
use DBI; |
use File::Find; |
use File::Find; |
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use localenroll; |
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######################################################## |
######################################################## |
######################################################## |
######################################################## |
Line 251 unless ($dbh = DBI->connect("DBI:mysql:l
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Line 217 unless ($dbh = DBI->connect("DBI:mysql:l
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my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!"; |
my $subj="LON: $perlvar{'lonHostID'} Cannot connect to database!"; |
system("echo 'Cannot connect to MySQL database!' |". |
system("echo 'Cannot connect to MySQL database!' |". |
" mailto $emailto -s '$subj' > /dev/null"); |
" mailto $emailto -s '$subj' > /dev/null"); |
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open(SMP,'>/home/httpd/html/lon-status/mysql.txt'); |
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print SMP 'time='.time.'&mysql=defunct'."\n"; |
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close(SMP); |
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exit 1; |
exit 1; |
} else { |
} else { |
$dbh->disconnect; |
$dbh->disconnect; |
Line 312 my $execdir=$perlvar{'lonDaemons'};
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Line 283 my $execdir=$perlvar{'lonDaemons'};
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open (PIDSAVE,">$execdir/logs/lonsql.pid"); |
open (PIDSAVE,">$execdir/logs/lonsql.pid"); |
print PIDSAVE "$$\n"; |
print PIDSAVE "$$\n"; |
close(PIDSAVE); |
close(PIDSAVE); |
&logthis("<font color=red>CRITICAL: ---------- Starting ----------</font>"); |
&logthis("<font color='red'>CRITICAL: ---------- Starting ----------</font>"); |
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# |
# |
# Ignore signals generated during initial startup |
# Ignore signals generated during initial startup |
Line 383 sub make_new_child {
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Line 354 sub make_new_child {
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$perlvar{'lonSqlAccess'}, |
$perlvar{'lonSqlAccess'}, |
{ RaiseError =>0,PrintError=>0})) { |
{ RaiseError =>0,PrintError=>0})) { |
sleep(10+int(rand(20))); |
sleep(10+int(rand(20))); |
&logthis("<font color=blue>WARNING: Couldn't connect to database". |
&logthis("<font color='blue'>WARNING: Couldn't connect to database". |
": $@</font>"); |
": $@</font>"); |
# "($st secs): $@</font>"); |
# "($st secs): $@</font>"); |
print "database handle error\n"; |
print "database handle error\n"; |
Line 411 sub make_new_child {
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Line 382 sub make_new_child {
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$queryid .= $run; |
$queryid .= $run; |
print $client "$queryid\n"; |
print $client "$queryid\n"; |
# |
# |
&logthis("QUERY: $query - $arg1 - $arg2 - $arg3"); |
# &logthis("QUERY: $query - $arg1 - $arg2 - $arg3"); |
sleep 1; |
sleep 1; |
# |
# |
my $result=''; |
my $result=''; |
Line 436 sub make_new_child {
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Line 407 sub make_new_child {
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$result='no_such_file'; |
$result='no_such_file'; |
} |
} |
# end of log query |
# end of log query |
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} elsif ($query eq 'fetchenrollment') { |
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# retrieve institutional class lists |
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my $dom = &unescape($arg1); |
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my %affiliates = (); |
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my %replies = (); |
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my $locresult = ''; |
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my $querystr = &unescape($arg3); |
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foreach (split/%%/,$querystr) { |
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if (/^(\w+)=([^=]+)$/) { |
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@{$affiliates{$1}} = split/,/,$2; |
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} |
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} |
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$locresult = &localenroll::fetch_enrollment($dom,\%affiliates,\%replies); |
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$result = &escape($locresult.':'); |
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if ($locresult) { |
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$result .= &escape(join(':',map{$_.'='.$replies{$_}} keys %replies)); |
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} |
} else { |
} else { |
# Do an sql query |
# Do an sql query |
$result = &do_sql_query($query,$arg1,$arg2); |
$result = &do_sql_query($query,$arg1,$arg2); |
Line 443 sub make_new_child {
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Line 431 sub make_new_child {
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# result does not need to be escaped because it has already been |
# result does not need to be escaped because it has already been |
# escaped. |
# escaped. |
#$result=&escape($result); |
#$result=&escape($result); |
# reply with result, append \n unless already there |
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$result.="\n" unless ($result=~/\n$/); |
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&reply("queryreply:$queryid:$result",$conserver); |
&reply("queryreply:$queryid:$result",$conserver); |
} |
} |
# tidy up gracefully and finish |
# tidy up gracefully and finish |
# |
# |
# close the database handle |
# close the database handle |
$dbh->disconnect |
$dbh->disconnect |
or &logthis("<font color=blue>WARNING: Couldn't disconnect". |
or &logthis("<font color='blue'>WARNING: Couldn't disconnect". |
" from database $DBI::errstr : $@</font>"); |
" from database $DBI::errstr : $@</font>"); |
# this exit is VERY important, otherwise the child will become |
# this exit is VERY important, otherwise the child will become |
# a producer of more and more children, forking yourself into |
# a producer of more and more children, forking yourself into |
Line 506 sub do_sql_query {
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Line 492 sub do_sql_query {
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#prepare and execute the query |
#prepare and execute the query |
my $sth = $dbh->prepare($query); |
my $sth = $dbh->prepare($query); |
unless ($sth->execute()) { |
unless ($sth->execute()) { |
&logthis("<font color=blue>WARNING: ". |
&logthis('<font color="blue">'. |
"Could not retrieve from database: $@</font>"); |
'WARNING: Could not retrieve from database:'. |
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$sth->errstr().'</font>'); |
} else { |
} else { |
my $aref=$sth->fetchall_arrayref; |
my $aref=$sth->fetchall_arrayref; |
foreach my $row (@$aref) { |
foreach my $row (@$aref) { |
Line 939 sub HUNTSMAN { # si
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Line 926 sub HUNTSMAN { # si
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kill 'INT' => keys %children; |
kill 'INT' => keys %children; |
my $execdir=$perlvar{'lonDaemons'}; |
my $execdir=$perlvar{'lonDaemons'}; |
unlink("$execdir/logs/lonsql.pid"); |
unlink("$execdir/logs/lonsql.pid"); |
&logthis("<font color=red>CRITICAL: Shutting down</font>"); |
&logthis("<font color='red'>CRITICAL: Shutting down</font>"); |
$unixsock = "mysqlsock"; |
$unixsock = "mysqlsock"; |
my $port="$perlvar{'lonSockDir'}/$unixsock"; |
my $port="$perlvar{'lonSockDir'}/$unixsock"; |
unlink($port); |
unlink($port); |
Line 950 sub HUPSMAN { # sig
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Line 937 sub HUPSMAN { # sig
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local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children |
local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children |
kill 'INT' => keys %children; |
kill 'INT' => keys %children; |
close($server); # free up socket |
close($server); # free up socket |
&logthis("<font color=red>CRITICAL: Restarting</font>"); |
&logthis("<font color='red'>CRITICAL: Restarting</font>"); |
my $execdir=$perlvar{'lonDaemons'}; |
my $execdir=$perlvar{'lonDaemons'}; |
$unixsock = "mysqlsock"; |
$unixsock = "mysqlsock"; |
my $port="$perlvar{'lonSockDir'}/$unixsock"; |
my $port="$perlvar{'lonSockDir'}/$unixsock"; |
Line 960 sub HUPSMAN { # sig
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Line 947 sub HUPSMAN { # sig
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sub DISCONNECT { |
sub DISCONNECT { |
$dbh->disconnect or |
$dbh->disconnect or |
&logthis("<font color=blue>WARNING: Couldn't disconnect from database ". |
&logthis("<font color='blue'>WARNING: Couldn't disconnect from database ". |
" $DBI::errstr : $@</font>"); |
" $DBI::errstr : $@</font>"); |
exit; |
exit; |
} |
} |
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# ----------------------------------- POD (plain old documentation, CPAN style) |
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=pod |
=pod |
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=back |
=back |