my $maxmaxdist=35;
my $maxcpu=90;
+my $concur_lim=5;
my $qa= \%ARGS;
my $routeparams= { EmsgRef => \$emsg, SayRequiredCapacity => 1 };
#---------- compute the results ----------
-my @rsargs= qw(-DN);
+my @rsargs= ($concur_lim, '-DN');
+my $concur_fail;
foreach my $k (qw(MaxMass MaxVolume MaxCapital)) {
my $v= $routeparams->{$k};
<%perl>
}
-unshift @rsargs, sourcebasedir().'/yarrg/routesearch',
- '-d', dbw_filename($qa->{'Ocean'});
+unshift @rsargs,
+ sourcebasedir().'/yarrg/routesearch',
+ '-d', dbw_filename($qa->{'Ocean'}),
+ '-C', webdatadir().'/_concur.', '.lock';
+
+# touch _concur.0{0,1,2,3,4}.lock
+# really chgrp www-data _concur.0?.lock
my %results; # $results{$ap}{"5 6 9 10"} = { stuff }
<% $_ |h %>
<%perl>
}
- next unless
- m/^ \@ *\d+ ([ap])\# *\d+ \|.*\| *\d+ +(\d+) +(\d+) *\| ([0-9 ]+)$/;
- my ($ap,$isles) = (uc $1,$4);
+ next unless m/^\s*\@/;
+ if (m/^\@\@\@ concurrency limit exceeded/) {
+ $concur_fail= 1;
+ last;
+ }
+ die unless m/^ \@ *\d+ ([ap])\# *\d+ \|.*\| *(\d+)lg *\| *\d+ +(\d+) +(\d+) *\| ([0-9 ]+)$/;
+ my ($ap,$isles) = (uc $1,$5);
next if $results{$ap} && %{$results{$ap}} >= $maxcountea;
- my $item= { A => $2, P => $3 };
+ my $item= { A => $3, P => $4, Leagues => $2 };
my (@i, @a);
foreach (split / /, $isles) {
my ($name,$arch)= $isleinfo->($_);
print "</pre>\n";
}
+$!=0;
+if (!close $fh) {
+ die $! if $!;
+ die $? if $? != 24; # SIGXCPU but not in POSIX.pm :-/
+</%perl>
+<h2>Search took too long and was terminated</h2>
+
+Sorry, but your query resulted in a search that took too long.
+Searches are limited to <% $maxcpu |h %> seconds of CPU time to
+avoid them consuming excessive resources on the server system, and to
+make sure that shorter searches can still happen.
+
+<p>
+Please try a search with a smaller minimum distance, or place more
+restrictions on the route.
+
+<%perl>
+ return;
+}
+
+if ($concur_fail) {
+</%perl>
+<h2>Server too busy</h2>
+
+Sorry, but there are already <% $concur_lim |h %> route searches
+running. We limit the number which can run at once to avoid
+overloading the server system and to make sure that the rest of the
+YARRG website still runs quickly.
+<p>
+
+If you submitted several searches and gave up on them (eg by hitting
+`back' or `stop' in your browser), be aware that that doesn't
+generally stop the search process at the server end. So it's best to
+avoid asking for large searches that you're not sure about.
+
+<p>
+Otherwise, please try later. Searches are limited to <% $maxcpu |h %>
+seconds of CPU time so more processing resources should be available soon.
+
+<%perl>
+ return;
+}
+
</%perl>
% foreach my $ap (qw(A P)) {
<h2>ap=<% $ap %></h2>
<table rules=groups>
<colgroup span=2>
<colgroup span=1>
+<colgroup span=1>
<colgroup span=3>
<tbody>
<tr>
<th colspan=2>Profit
+<th>Dist.
<th>Archipelagoes
<th colspan=3>Route
<tr>
<th>Abs.
<th>Per.lg.
<th>
+<th>
<th>Start
<th>Via
<th>Finish
<tr class="datarow<% $datarow %>">
<td align=right><% $item->{A} |h %>
<td align=right><% $item->{P} |h %>
+<td align=right><% $item->{Leagues} |h %>
<td align=left><% join ', ', @{ $item->{Archs} } |h %>
<td align=left><% $item->{Start} |h %>,
<td align=left><% join ' ', map { $_.',' } @{ $item->{Vias} } |h %>