#!/bin/bash

##################################################
# Mount dir                                      #
# - /data/applogs                                #
# ENV                                            #
# - JAVA_OPTS                                    #
##################################################

set -euo pipefail
export LANG=en_US.UTF-8
trap Quit EXIT

PIDS=
GOT_SIGTERM=
export JAVA_OPTS="-server -Djava.security.egd=file:/dev/./urandom -Duser.timezone=GMT+08 ${JAVA_OPTS:-}"

function Print {
    local file=/dev/null
    [ '-f' = "$1" ] && file=$2 && shift && shift
    date +"[%F %T] $*" | tee -a $file
}

function Quit {
    Print killing java ...
    while :; do
        pkill -f java && Print killing java ... || break
        sleep 1
    done
    Print Container stopped.
    test -n "$GOT_SIGTERM"
}

function ModifyConf {
    sed  -i 's/^M//g' $JAR.properties
    local kv=
    Print Modify $JAR.properties ...
    while read kv; do
    [ -z "$kv" ] && return 0
    Print Modify property: ${kv%%=*} ...
    sed -i "/^${kv%%=*} *=/c$kv" $JAR.properties
    done <<< "$(env | grep '^_CONF_' | sed 's/_CONF_//')"
}

function StartProc {
    Print Start $JAR ...
    java $JAVA_OPTS \
    -jar $JAR.jar \
    --spring.config.location=$JAR.properties \
    >/dev/null \
    2>>logs/$JAR.out &
    PIDS="$PIDS $!"
}

function Main {
    local pid=
    cd /opt/
    ModifyConf
    StartProc
    trap "GOT_SIGTERM=1; Print Got SIGTERM ..." SIGTERM
    while [ -z "$GOT_SIGTERM" ] && sleep 1; do
        for pid in $PIDS; do
            [ ! -e /proc/$pid ] && Print Unexpected error! && exit
        done
    done
}

# Start here
Main