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 $SIG{'PIPE'} = 'IGNORE'; # See BZ 35111; added to ignore PIPE error when connection lost on Ubuntu.
69 my ( $help, @queues );
71 my $max_processes = $ENV{MAX_PROCESSES};
72 $max_processes ||= C4::Context->config('background_jobs_worker')->{max_processes} if C4::Context->config('background_jobs_worker');
76 'm|max-processes=i' => \$max_processes,
78 'queue=s' => \@queues,
82 pod2usage(0) if $help;
85 push @queues, 'default';
90 $conn = Koha::BackgroundJob->connect;
92 warn sprintf "Cannot connect to the message broker, the jobs will be processed anyway (%s)", $_;
95 my $pm = Parallel::ForkManager->new($max_processes);
98 # FIXME cf note in Koha::BackgroundJob about $namespace
99 my $namespace = C4::Context->config('memcached_namespace');
100 for my $queue (@queues) {
103 destination => sprintf( "/queue/%s-%s", $namespace, $queue ),
105 'prefetch-count' => 1,
112 my $frame = $conn->receive_frame;
113 if ( !defined $frame ) {
114 # maybe log connection problems
115 next; # will reconnect automatically
119 my $body = $frame->body;
120 decode_json($body); # TODO Should this be from_json? Check utf8 flag.
122 Koha::Logger->get({ interface => 'worker' })->warn(sprintf "Frame not processed - %s", $_);
125 $conn->ack( { frame => $frame } );
130 # FIXME This means we need to have create the DB entry before
131 # It could work in a first step, but then we will want to handle job that will be created from the message received
132 my $job = Koha::BackgroundJobs->search( { id => $args->{job_id}, status => 'new' } )->next;
135 Koha::Logger->get( { interface => 'worker' } )
136 ->warn( sprintf "Job %s not found, or has wrong status", $args->{job_id} );
141 srand(); # ensure each child process begins with a new seed
142 process_job( $job, $args );
146 my $jobs = Koha::BackgroundJobs->search({ status => 'new', queue => \@queues });
147 while ( my $job = $jobs->next ) {
149 $job->json->decode($job->data);
151 Koha::Logger->get({ interface => 'worker' })->warn(sprintf "Cannot decode data for job id=%s", $job->id);
152 $job->status('failed')->store;
159 srand(); # ensure each child process begins with a new seed
160 process_job( $job, { job_id => $job->id, %$args } );
168 $pm->wait_all_children;
171 my ( $job, $args ) = @_;
173 $job->process( $args );
175 $job->status('failed')->store;