1Test2::Harness::Util::QUuseeure(C3o)ntributed Perl DocumTeenstta2t:i:oHnarness::Util::Queue(3)
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NAME

6       Test2::Harness::Util::Queue - Representation of a queue.
7

DESCRIPTION

9       This module represents a queue, stored as a jsonl file.
10

SYNOPSIS

12           use Test2::Harness::Util::Queue;
13
14           my $queue = Test2::Harness::Util::Queue->new(file => '/path/to/queue.jsonl');
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16           $queue->start(); # Create the queue
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18           $queue->enqueue({foo => 'bar', baz => 'bat'});
19           $queue->enqueue({foo => 'bar2', baz => 'bat2'});
20           ...
21
22           $queue->end();
23
24       Then in another processs:
25
26           use Test2::Harness::Util::Queue;
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28           my $queue = Test2::Harness::Util::Queue->new(file => '/path/to/queue.jsonl');
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30           my @items;
31           while (1) {
32               @items = $queue->poll();
33               while (@items) {
34                   my $item = shift @items or last;
35
36                   ... process $item
37               }
38
39               # Queue ends with an 'undef' entry
40               last if @items && !defined($items[0]);
41           }
42

METHODS

44       $path = $queue->file
45           The filename used for the queue
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47   READING
48       $queue->reset()
49           Restart reading the queue.
50
51       @items = $queue->poll()
52           Get more items from the queue. May need to call it multiple times,
53           specially if another process is still writing to the queue.
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55           Returns an empty list if no items are available yet.
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57           Returns 'undef' to terminate the list.
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59       $bool = $queue->ended()
60           Check if the queue has ended.
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WRITING

63       $queue->start()
64           Open the queue file for writing.
65
66       $queue->enqueue(\%HASHREF)
67           Add an item to the queue.
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69       $queue->end()
70           Terminate the queue.
71

SOURCE

73       The source code repository for Test2-Harness can be found at
74       http://github.com/Test-More/Test2-Harness/.
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MAINTAINERS

77       Chad Granum <exodist@cpan.org>
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AUTHORS

80       Chad Granum <exodist@cpan.org>
81

83       Copyright 2020 Chad Granum <exodist7@gmail.com>.
84
85       This program is free software; you can redistribute it and/or modify it
86       under the same terms as Perl itself.
87
88       See http://dev.perl.org/licenses/
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92perl v5.32.0                      2020-07-28    Test2::Harness::Util::Queue(3)
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