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#!/bin/bash
#
# tws: - comfortable shell script for running TWS
#
# usage: - set your paths in config section below
#        - see --help
#
# Copyright (C) 2011 Ruediger Meier <sweet_f_a@gmx.de>
# License: BSD 3-Clause


#### config section

TWS_HOME="${HOME}/.tws"
TWS_DIR="/opt/TWS/IBJts"
IBController_DIR="/opt/TWS/IBController"


#### defaults, don't change!

GATEWAY="0"
JAVA_OPTS=""
CONTROLLER="0"
PATCHED="0"
LOOP="0"
DRYRUN="0"


#### funcs

_print_usage()
{
	cat <<EOF
Usage: $0  [--gw] [--javaopts OPTIONS] [-p|--patched] [-c|--controller] \
[--loop] [--tws TWS_DIR] [--test] [--] [TWS_HOME]
EOF
}

_parse_cmd()
{
	local TEMP
	TEMP=$(getopt -o cph \
		--long gw,javaopts:,controller,patched,loop,tws:,test,help \
		-n "$0" -- "$@" \
		) || return 1
	eval set -- "$TEMP"

	while true ; do
	case "$1" in
		--gw)
			GATEWAY="1"; shift;;
		--javaopts)
			JAVA_OPTS="$2"; shift 2;;
		-c|--controller)
			CONTROLLER="1"; shift;;
		-p|--patched)
			PATCHED="1"; shift;;
		--loop)
			LOOP="1"; shift 1;;
		--tws)
			TWS_DIR="$(readlink -f "$2")"; shift 2;;
		--test)
			DRYRUN="1"; shift 1;;
		--help)
			_print_usage; exit 0;;
		--)
			shift ; break ;;
		*)
			echo "$0: Internal error!" >&2; return 1;;
		esac
	done

	#Remaining arguments:
	if test "$#" -gt 1  ;then
		echo "$0: bad usage" 2>&1
		return 1
	elif test "$#" -gt 0  ;then
		TWS_HOME="$1"
	fi

	LOGFILE="${TWS_HOME}/tws_restart.log"
}

echo_log()
{
	local now=`date "+%F %T"`
	echo -e "${now}: $@" |tee -a "${LOGFILE}" >&2
}

eval_loop()
{
	if test ${LOOP} = 0 ;then
		echo_log "start tws"
		eval "$@"
		echo_log "tws exit code $?"
	else
		local i="0";
		while true; do
			echo_log "start tws loop $i"
			eval "$@"
			echo_log "tws exit code $? ... will be restarted"
			i="$(( i+1 ))"
			sleep 1
		done
	fi
}

_java_exec()
{
	if [ "${DRYRUN}" = "1" ] ;then
		echo "CONTROLLER='${CONTROLLER}'"
		echo "PATCHED='${PATCHED}'"
		echo "IBController_DIR='${IBController_DIR}'"
		echo "TWS_DIR='${TWS_DIR}'"
		echo "TWS_HOME='${TWS_HOME}'"
		echo "CLASSPATH='${CLASSPATH}'"
		echo "java ${JAVA_OPTS} -cp '${CLASSPATH}' $@"
	else
		eval_loop "java ${JAVA_OPTS} -cp '${CLASSPATH}' $@"
	fi
}




#### here we go

if ! _parse_cmd "$@" ;then
	exit 1
fi



if [ "${PATCHED}" = 1 ] ;then
	TWS_DIR=${TWS_DIR}-patched
fi

if ! test -d  "${TWS_DIR}" ;then
	echo "$0: invalid TWS_DIR: '${TWS_DIR}'" >&2
	exit 1
fi
if ! test -d  "${TWS_HOME}" ;then
	echo "$0: invalid TWS_HOME: '${TWS_HOME}'" >&2
	exit 1
fi

cd "${TWS_HOME}" || exit 1



#getting classpath
for jarfile in ${TWS_DIR}/*.jar ;do
     CLASSPATH="${CLASSPATH}:${jarfile}"
done
#add path to (eventually existing) patches
CLASSPATH=${TWS_DIR}/include_patches:${TWS_DIR}/jts:${CLASSPATH}


if [ "${CONTROLLER}" = 1 ] ;then
	temp=""
	if ! temp="$(sed '/^IbDir=\.\r\{0,1\}$/!d' IBController.ini 2>/dev/null)" ;then
		echo "$0: ${TWS_HOME}/IBController.ini not found" >&2;
		exit 1
	fi
	if test -z "${temp}" ;then
		echo "$0: ${TWS_HOME}/IBController.ini must contain 'IbDir=.'" >&2;
		exit 1
	fi
	CLASSPATH="${IBController_DIR}/IBController.jar:${CLASSPATH}"
	if [ "${GATEWAY}" = 1 ] ;then
		_java_exec ibcontroller.IBGatewayController ./IBController.ini
	else
		_java_exec ibcontroller.IBController ./IBController.ini
	fi
else
	if [ "${GATEWAY}" = 1 ] ;then
		_java_exec ibgateway.GWClient .
	else
		_java_exec jclient.LoginFrame .
	fi
fi