#!/bin/bash

# Copyright: 2023 Virtuozzo International GmbH

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.



inherit os;
include log;

DESCRIPTION="Manipulate memcached";
VERSION="1"
DEFAULT_ACTION="SetMem";
$PROGRAM 'sed';
$PROGRAM 'grep';

typeset -i __RESERVED_SIZE=20;
PREFIX='memcached';

function doUsage() {
    showUsageMessage
}

function describeStart () {
    echo "Starts a memcached daemon";
}

function doStart() {
    startService memcached || die -q "Unable to start service"
}

function describeStop () {
    echo "Stops a memcached daemon";
}

function doStop() {
    stopService memcached || die -q "Unable to stop service";
}

function describeSetMem () {
    echo "Sets memcached memory size";
}

function doSetMem() {
    FLOAT_SCALE=0;
    typeset -i memcached_CACHESIZE=$(getMemory MemTotal MB)-${__RESERVED_SIZE};
    local var_names=$($GREP -o -P "${PREFIX}_[a-zA-Z_]*" $BASH_SOURCE) v cpn;
    local config_path=${1:-'/etc/sysconfig/memcached'};

    doStop;
    for v in ${var_names} ; do
        cpn=${v:10};
        $SED -i 's/^'${cpn}'=.*$'/${cpn}'="'${!v}'"/g' ${config_path};
        isFunction log && log "Parameter ${cpn} is set to ${!v}";
    done
    doStart;

    return 0;
}