ttstop

#!/bin/bash
#
# Author: chris.jenkins@oracle.com
#
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
#
# LICENSE UPL 1.0
#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# Script to stop the TimesTen container.
#

declare -r cfgfilename="container.cfg"
declare -r dflt_containername="ttcontainer"
declare -r chkintvl=2
declare -r maxchecks=50
declare -r ftemplate="ttcontainer_stop_XXXXX"
export TMPDIR=/tmp

declare basedir
declare cfgfile
declare tmpf
declare -i ret=0

usage()
{
    echo
    echo "Usage:"
    echo
    echo "    ttstop"
    echo
    echo "Cleanly terminates a running TimesTen container."
    echo
    exit 100
}

doWait()
{
    local res
    local -i nchecks=0

    while [[ ${nchecks} -lt ${maxchecks} ]]
    do
        res=$(docker logs "${DOCKER_TTCONTAINER}" 2>/dev/null | grep "info: TTSTOP" | tail -n 1)
        if [[ "${res}" == "info: TTSTOP complete" ]]
        then 
            return 0
        elif [[ "${res}" =~ "info: TTSTOP exit " ]]
        then 
            return 1
        fi
        sleep ${chkintvl}
        nchecks=${nchecks}+1
        if ! docker ps 2>/dev/null | grep -q "${DOCKER_TTCONTAINER}"
        then
            return 0
        fi
    done

    return 2
}

loadConfig()
{
    local cfile

    if [[ $# -ne 1 ]]
    then
        return 1
    fi
    cfile="$1"

    if ! source "${cfile}" >& /dev/null
    then
        echo
        echo "error: unable to load configuration from '${cfile}'"
        echo
        return 1
    fi
    if [[ "${DOCKER_TTCONTAINER}" == "" ]]
    then
        export DOCKER_TTCONTAINER="${dflt_containername}"
    fi

    return 0
}

if [[ $# -gt 0 ]]
then
    usage
fi

basedir=$(dirname "$0")
cfgfile="${basedir}/${cfgfilename}"
if ! loadConfig "${cfgfile}"
then
    exit 1
fi

if ! docker ps 2>/dev/null | grep -q "${DOCKER_TTCONTAINER}"
then
    exit 0
fi

if ! tmpf=$(mktemp -q -t "${ftemplate}")
then
    echo >&2 "error: unable to create a temporary file"
    exit 1
fi

if ! docker kill --signal TERM "${DOCKER_TTCONTAINER}" > "${tmpf}" 2>&1
then
    ret=2
else
    if ! doWait
    then
        ret=3
    fi
    if ! docker kill --signal KILL "${DOCKER_TTCONTAINER}" >> "${tmpf}" 2>&1
    then
        ret=4
    fi
fi

if [[ ${ret} -ne 0 ]]
then
    cat "${tmpf}"
    docker logs "${DOCKER_TTCONTAINER}"
fi

rm -f "${tmpf}" >& /dev/null

exit ${ret}