X-Git-Url: http://git.indexdata.com/?p=irspy-moved-to-github.git;a=blobdiff_plain;f=lib%2FZOOM%2FPod.pm;h=a428619199a62ea8339ad687fdfe1a14916b5bd4;hp=8844ce700e6152e7b0d5fc1fc1abde956fc8ea1a;hb=4ef60552e7fdc908b71ed74a7a484958a748cbfe;hpb=2febd2313b62a31b2720240ab8a430476e213748

diff --git a/lib/ZOOM/Pod.pm b/lib/ZOOM/Pod.pm
index 8844ce7..a428619 100644
--- a/lib/ZOOM/Pod.pm
+++ b/lib/ZOOM/Pod.pm
@@ -1,4 +1,4 @@
-# $Id: Pod.pm,v 1.2 2006-05-09 12:03:37 mike Exp $
+# $Id: Pod.pm,v 1.5 2006-05-10 16:01:04 mike Exp $
 
 package ZOOM::Pod;
 
@@ -7,39 +7,83 @@ use warnings;
 
 use ZOOM;
 
+BEGIN {
+    # Just register the name
+    ZOOM::Log::mask_str("pod");
+    ZOOM::Log::mask_str("pod_unhandled");
+}
+
+=head1 NAME
+
+ZOOM::Pod - Perl extension for handling pods of concurrent ZOOM connections
+
 =head1 SYNOPSIS
 
- $conn1 = new ZOOM::Connection("bagel.indexdata.com/gils");
- $conn2 = new ZOOM::Connection("z3950.loc.gov:7090/Voyager");
- $pod = new ZOOM::Pod($conn1, $conn2);
- $pod->callback(ZOOM::Event::RECV_SEARCH, \&show_result);
- $pod->search_pqf("mineral");
- $pod->wait();
+ use ZOOM::Pod;
+
+ $pod = new ZOOM::Pod("bagel.indexdata.com/gils",
+                      "bagel.indexdata.com/marc");
+ $pod->callback(ZOOM::Event::RECV_SEARCH, \&completed_search);
+ $pod->callback(ZOOM::Event::RECV_RECORD, \&got_record);
+ $pod->search_pqf("the");
+ $err = $pod->wait();
+ die "$pod->wait() failed with error $err" if $err;
+
+ sub completed_search {
+     ($conn, undef, $rs) = @_;
+     print $conn->option("host"), ": found ", $rs->size(), " records\n";
+     $rs->records(0, 1, 0); # Queues a request for the record
+     return 0;
+ }
 
- sub show_result {
-     ($conn, $rs, $event) = @_;
-     print "$conn: found ", $rs->size(), " records\n";
+ sub got_record {
+     ($conn, undef, $rs) = @_;
+     $rec = $rs->record(0);
+     print $conn->option("host"), ": got $rec = '", $rec->render(), "'\n";
+     return 0;
  }
 
+=head1 DESCRIPTION
+
+I<###>
+
+=head1 METHODS
+
 =cut
 
 sub new {
     my $class = shift();
     my(@conn) = @_;
 
+    die "$class with no connections" if @conn == 0;
+    my @state; # Hashrefs with application state associated with connections
     foreach my $conn (@conn) {
 	if (!ref $conn) {
 	    $conn = new ZOOM::Connection($conn, 0, async => 1);
+	    # The $conn object is always made, even if no there's no
+	    # server.  Such errors are caught later, by the _check()
+	    # call in wait(). 
 	}
+	push @state, {};
     }
 
     return bless {
 	conn => \@conn,
+	state => \@state,
 	rs => [],
 	callback => {},
     }, $class;
 }
 
+sub option {
+    my $this = shift();
+    my($key, $value) = @_;
+
+    foreach my $conn (@{ $this->{conn} }) {
+	$conn->option($key, $value);
+    }
+}
+
 sub callback {
     my $this = shift();
     my($event, $sub) = @_;
@@ -67,11 +111,27 @@ sub wait {
     while ((my $i = ZOOM::event($this->{conn})) != 0) {
 	my $conn = $this->{conn}->[$i-1];
 	my $ev = $conn->last_event();
-	print("connection ", $i-1, ": ", ZOOM::event_str($ev), "\n");
+	my $evstr = ZOOM::event_str($ev);
+	ZOOM::Log::log("pod", "connection ", $i-1, ": $evstr");
+
+	eval {
+	    $conn->_check();
+	}; if ($@) {
+	    my $sub = $this->{callback}->{exception};
+	    die $@ if !defined $sub;
+	    $res = &$sub($conn, $this->{state}->[$i-1],
+			 $this->{rs}->[$i-1], $@);
+	    last if $res != 0;
+	    next;
+	}
+
 	my $sub = $this->{callback}->{$ev};
 	if (defined $sub) {
-	    $res = &$sub($conn, $this->{rs}->[$i-1], $ev);
+	    $res = &$sub($conn, $this->{state}->[$i-1],
+			 $this->{rs}->[$i-1], $ev);
 	    last if $res != 0;
+	} else {
+	    ZOOM::Log::log("pod_unhandled", "unhandled event $ev ($evstr)");
 	}
     }
 
@@ -79,4 +139,27 @@ sub wait {
 }
 
 
+=head1 SEE ALSO
+
+The underlying
+C<ZOOM>
+module (part of the
+C<Net::Z3950::ZOOM>
+distribution).
+
+=head1 AUTHOR
+
+Mike Taylor, E<lt>mike@indexdata.comE<gt>
+
+=head1 COPYRIGHT AND LICENCE
+
+Copyright (C) 2006 by Index Data.
+
+This library is free software; you can redistribute it and/or modify
+it under the same terms as Perl itself, either Perl version 5.8.4 or,
+at your option, any later version of Perl 5 you may have available.
+
+=cut
+
+
 1;