That is not correct. The callback from $delay->begin is intended to be invoked when the non-blocking activity is ready, after the control has returned to the event loop.
On Tue, Mar 24, 2015 at 9:57 AM, Daniel Mantovani <[email protected]> wrote: > In Mojo::IOLoop either $delay->begin or $delay->end must be invoked BEFORE > you leave each step. It doesn't seem to be the case in the first step. > > There is a very nice explanation of what is hapening here: > http://www.slideshare.net/deepfountainconsulting/asynchronous-programming-patterns-in-perl. > There is even a very similar case in the quiz # 1, page 91. Just writing > $delay->begin inside a callback does not mean you are actually invoking it > before you leave the step. > > Second step looks fine, I tried but couldn't actually make it work :( but > hope this comment will help. > > BR, > Daniel > > El martes, 24 de marzo de 2015, 1:34:11 (UTC-3), Alexey Stavrov escribió: > >> I have this code which not output "666", "End Inserts", "End". What i do >> wrong? >> >> #!/usr/bin/perl >> >> >> use strict; >> use warnings; >> use v5.10; >> >> >> use Mojo::Pg; >> use Mojo::IOLoop; >> >> >> my $pg = Mojo::Pg->new('postgresql://alex@/test'); >> >> >> my $db = $pg->db; >> >> >> $db->query(q{create table if not exists qwe (num integer, text text)}); >> >> >> sub upsert { >> Mojo::IOLoop->delay( >> sub { >> my $delay = shift; >> for my $i (1 .. 30) { >> warn "update: $i"; >> $db->query(q{update qwe set num = ? where text = ?}, $i, "$i" => >> $delay->begin); >> } >> }, >> sub { >> my $delay = shift; >> >> >> $delay->pass; >> >> >> for my $i (1 .. 30) { >> my ($err, $res) = (shift, shift); >> unless ($res->rows) { >> my $end = $delay->begin; >> say "insert $i"; >> $db->query(q{insert into qwe(num, text) values (?, ?)}, $i, >> "$i" => sub { say '666'; $end->(@_); }); >> } >> } >> }, >> sub { >> say 'End inserts'; >> Mojo::IOLoop->stop; >> } >> ); >> } >> >> >> upsert(); >> >> >> Mojo::IOLoop->start; >> >> >> say 'End'; >> >> >> >> Thanks. >> > -- > You received this message because you are subscribed to the Google Groups > "Mojolicious" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/mojolicious. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Mojolicious" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/mojolicious. For more options, visit https://groups.google.com/d/optout.
