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Re^6: multi threading DBI

by Anonymous Monk
on Oct 31, 2013 at 06:56 UTC ( #1060515=note: print w/ replies, xml ) Need Help??


in reply to Re^5: multi threading DBI
in thread multi threading DBI

Thank you, but I have a bunch of termination errors in "fetchNParse": Thread 1 terminated abnormally: Can't call method "enqueue" on an undefined value at test.cgi line 16. seems $Qout is causing problem?


Comment on Re^6: multi threading DBI
Re^7: multi threading DBI
by BrowserUk (Pope) on Oct 31, 2013 at 06:59 UTC

    I'm not psychic. Post the (exact) code that is giving you the errors.


    With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    "Science is about questioning the status quo. Questioning authority".
    In the absence of evidence, opinion is indistinguishable from prejudice.
      Yes, Sir! To isolate the error I disabled the DBI and even the LWP... so this script do nothing but printing ...
      #! perl use strict; use threads; use Thread::Queue; use LWP::Simple; use DBI; sub fetchNParse { my( $Qin, $Qout ) = shift; while( my $uname = $Qin->dequeue ) { #my $content = get $uname; #my @bits = $content =~ m[....]; my @bits=qw(pizza2 steak2 chicken2 burgers2); print " $uname 1\n"; #$Qout->enqueue( join $;, $uname, @bits ); $Qout->enqueue( $uname ); } $Qout->enqueue( undef ); } our $THREADS //= 16; my $Qunames = new Thread::Queue; my $Qrets = new Thread::Queue; threads->create( \&fetchNParse, $Qunames,$Qrets )->detach for 1 .. $TH +READS; #my $dbh = DBI->connect( ... ); #my $unames = $dbh->selectcol_arrayref("select uname from event"); my @unames = qw(pizza steak chicken burgers); print "a\n"; $Qunames->enqueue( @unames ); print "b\n"; for( 1 .. $THREADS ) { while( my $ret = $Qrets->dequeue ) { #my( $uname, @bits ) = split $;, $ret. #$dbh->do( insert stuff ); print "2\n"; } } #$dbh->disconnect;

        You can't get 2 variables from one shift.

        my( $Qin, $Qout ) = shift;

        And yes, I know I posted code that didn't work. I also warned you.


        With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
        Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
        "Science is about questioning the status quo. Questioning authority".
        In the absence of evidence, opinion is indistinguishable from prejudice.

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