Koha-clms/debian/scripts/koha-worker

#!/bin/bash
#
# Copyright 2020 Koha Development team
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

. /lib/lsb/init-functions

# Read configuration variable file if it is present
[ -r /etc/default/koha-common ] && . /etc/default/koha-common

# include helper functions
if [ -f "/usr/share/koha/bin/koha-functions.sh" ]; then
    . "/usr/share/koha/bin/koha-functions.sh"
else
    echo "Error: /usr/share/koha/bin/koha-functions.sh not present." 1>&2
    exit 1
fi

usage()
{
    local scriptname=$(basename $0)

    cat <<EOF
$scriptname

This script lets you manage the worker daemon for your Koha instances.

Usage:
$scriptname [--start|--stop|--restart] [--queue queue_name|--all-queues] [--quiet|-q] instancename1 [instancename2...]
$scriptname --status instancename1 [instancename2...]
$scriptname -h|--help

    --start               Start the worker daemon for the specified instances
    --stop                Stop the worker daemon for the specified instances
    --restart             Restart the worker daemon for the specified instances
    --enable              Enable the worker daemon for the specified instances
    --disable             Disable the worker daemon for the specified instances
    --queue               Specify the queue/worker to perform the action on - 'default' is
                          used if not specified (unless --all-queues is passed)
                          current queues are: default, long_tasks
    --all-queues          Perform the action on all defined queues
    --status              Show the status of the worker for the specified instances
    --quiet|-q            Make the script quiet about non existent instance names
                          (useful for calling from another scripts).
    --help|-h             Display this help message

Note: There used to be a queue called elastic_index, but since the introduction
of koha-es-indexer this queue should not be active.

EOF
}

start_worker()
{
    local name=$1
    local queues=$2
    if [ "$(koha_init_backend)" = "systemd" ]; then
        for queue in $queues; do
            koha_service_ctl start worker "$name" "$queue"
        done
    else
        _sysv_start_worker "$name" "$queues"
    fi
}

stop_worker()
{
    local name=$1
    local queues=$2
    if [ "$(koha_init_backend)" = "systemd" ]; then
        for queue in $queues; do
            koha_service_ctl stop worker "$name" "$queue"
        done
    else
        _sysv_stop_worker "$name" "$queues"
    fi
}

restart_worker()
{
    local name=$1
    local queues=$2
    if [ "$(koha_init_backend)" = "systemd" ]; then
        for queue in $queues; do
            koha_service_ctl restart worker "$name" "$queue"
        done
    else
        _sysv_restart_worker "$name" "$queues"
    fi
}

enable_worker()
{
    local name=$1
    local queues=$2
    if [ "$(koha_init_backend)" = "systemd" ]; then
        for queue in $queues; do
            koha_service_ctl enable worker "$name" "$queue"
        done
    fi
}

disable_worker()
{
    local name=$1
    local queues=$2
    if [ "$(koha_init_backend)" = "systemd" ]; then
        for queue in $queues; do
            koha_service_ctl disable worker "$name" "$queue"
        done
    fi
}

worker_status()
{
    local name=$1
    local queues=$2
    if [ "$(koha_init_backend)" = "systemd" ]; then
        for queue in $queues; do
            koha_service_ctl status worker "$name" "$queue"
        done
    else
        _sysv_worker_status "$name" "$queues"
    fi
}

set_action()
{
    if [ "$op" = "" ]; then
        op=$1
    else
        die "Error: only one action can be specified."
    fi
}

op=""
queue="default"
quiet="no"
all_queues="no"

# Read command line parameters
while [ $# -gt 0 ]; do

    case "$1" in
        -h|--help)
            usage ; exit 0 ;;
        -q|--quiet)
            quiet="yes"
            shift ;;
        --start)
            set_action "start"
            shift ;;
        --stop)
            set_action "stop"
            shift ;;
        --restart)
            set_action "restart"
            shift ;;
        --enable)
            set_action "enable"
            shift ;;
        --disable)
            set_action "disable"
            shift ;;
        --status)
            set_action "status"
            shift ;;
        --queue)
            queue="$2"
            shift 2 ;;
        --all-queues)
            all_queues="yes";
            shift ;;
        -*)
            die "Error: invalid option switch ($1)" ;;
        *)
            # We expect the remaining stuff are the instance names
            break ;;
    esac

done

if [ $# -gt 0 ]; then
    # We have at least one instance name
    for name in "$@"; do

        if is_instance $name; then

            adjust_paths_git_install $name
            worker_DAEMON="${KOHA_HOME}/${KOHA_BINDIR}/workers/background_jobs_worker.pl"
            export PERL5LIB

            if [ "$all_queues" = "yes" ]; then
                queues=$(get_worker_queues | xargs)
            else
                queues=$queue
            fi

            case $op in
                "start")
                    start_worker "$name" "$queues"
                    ;;
                "stop")
                    stop_worker "$name" "$queues"
                    ;;
                "restart")
                    restart_worker "$name" "$queues"
                    ;;
                "enable")
                    enable_worker "$name" "$queues"
                    ;;
                "disable")
                    disable_worker "$name" "$queues"
                    ;;
                "status")
                    worker_status "$name" "$queues"
            esac

        else
            if [ "$quiet" = "no" ]; then
                log_daemon_msg "Error: Invalid instance name $name"
                log_end_msg 1
            fi
        fi

    done
else
    if [ "$quiet" = "no" ]; then
        warn "Error: you must provide at least one instance name"
    fi
fi

exit 0