3 # This file is part of Koha.
5 # Koha is free software; you can redistribute it and/or modify it
6 # under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 3 of the License, or
8 # (at your option) any later version.
10 # Koha is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with Koha; if not, see <http://www.gnu.org/licenses>.
20 background_jobs_worker.pl - Worker script that will process background jobs
24 ./background_jobs_worker.pl [--queue QUEUE] [-m|--max-processes MAX_PROCESSES]
28 This script will connect to the Stomp server (RabbitMQ) and subscribe to the queues passed in parameter (or the 'default' queue),
29 or if a Stomp server is not active it will poll the database every 10s for new jobs in the passed queue.
31 You can specify some queues only (using --queue, which is repeatable) if you want to run several workers that will handle their own jobs.
33 --m --max-processes specifies how many jobs to process simultaneously
35 Max processes will be set from the command line option, the environment variable MAX_PROCESSES, or the koha-conf file, in that order of precedence.
36 By default the script will only run one job at a time.
44 Repeatable. Give the job queues this worker will process.
46 The different values available are:
56 use JSON qw( decode_json );
60 use Parallel::ForkManager;
64 use Koha::BackgroundJobs;
67 my ( $help, @queues );
69 my $max_processes = $ENV{MAX_PROCESSES};
70 $max_processes ||= C4::Context->config('background_jobs_worker')->{max_processes} if C4::Context->config('background_jobs_worker');
74 'm|max-processes=i' => \$max_processes,
76 'queue=s' => \@queues,
80 pod2usage(0) if $help;
83 push @queues, 'default';
88 $conn = Koha::BackgroundJob->connect;
90 warn sprintf "Cannot connect to the message broker, the jobs will be processed anyway (%s)", $_;
93 my $pm = Parallel::ForkManager->new($max_processes);
96 # FIXME cf note in Koha::BackgroundJob about $namespace
97 my $namespace = C4::Context->config('memcached_namespace');
98 for my $queue (@queues) {
101 destination => sprintf( "/queue/%s-%s", $namespace, $queue ),
103 'prefetch-count' => 1,
110 my $frame = $conn->receive_frame;
111 if ( !defined $frame ) {
112 # maybe log connection problems
113 next; # will reconnect automatically
117 my $body = $frame->body;
118 decode_json($body); # TODO Should this be from_json? Check utf8 flag.
120 Koha::Logger->get({ interface => 'worker' })->warn(sprintf "Frame not processed - %s", $_);
123 $conn->ack( { frame => $frame } );
128 # FIXME This means we need to have create the DB entry before
129 # It could work in a first step, but then we will want to handle job that will be created from the message received
130 my $job = Koha::BackgroundJobs->find($args->{job_id});
133 Koha::Logger->get({ interface => 'worker' })->warn(sprintf "No job found for id=%s", $args->{job_id});
138 process_job( $job, $args );
142 my $jobs = Koha::BackgroundJobs->search({ status => 'new', queue => \@queues });
143 while ( my $job = $jobs->next ) {
145 $job->json->decode($job->data);
147 Koha::Logger->get({ interface => 'worker' })->warn(sprintf "Cannot decode data for job id=%s", $job->id);
148 $job->status('failed')->store;
155 process_job( $job, { job_id => $job->id, %$args } );
165 my ( $job, $args ) = @_;
173 die "fork failed!" unless defined $pid;
176 $job->process( $args );
178 $job->status('failed')->store;