#!/bin/bash
#
# Namaste launch script -- launches the brokers via nohup as background (daemon) processes
#
# usage:  $0 >/dev/null
#
# Note that this bash script should be called from the php script: startBrokers.php
#
# although it will work fine if called by itself - the launch script reads the configuration file
# and launches the number of broker instances specified therein.
#
# HISTORY:
# --------
# 06-12-17      mks     original coding
#

if [ $(id -u) = "0" ];
then
	echo "$0 cannot be run as root"
	exit 1
fi

SCRIPT=$(readlink -f $0)
SCRIPTPATH=$(dirname ${SCRIPT})
BASEPATH=$(dirname ${SCRIPTPATH})
#echo "0: basepath: ${BASEPATH}"
TDIR="${BASEPATH}/brokers"
PDIR="${BASEPATH}/pids/"
if [ $# -eq 0 ]
then
    for file in ${TDIR}/*.php
    do
        echo ${file}
        [ -f ${file} -a -s ${file} ] && nohup php -f ${file} 2>&1 &
    done
else
    # if arguments are passed, loop through each assuming the formats 'brokerFileName' or 'brokerFileName:n'
    # where 'n' is the number of instances of that broker to run
    #
    # example: 'dwBroker:5' would start 5 instances of the delayed-write broker
    for arg in "$@"
    do
        IFS=':' read -ra splitArg <<< "${arg}"

        # get number of processes for this broker
        numProcesses=1
        splitsize="${#splitArg[@]}"
        if [ ${splitsize} -eq 2 ]
        then
            numProcesses=0;
            processLocation=${splitArg[1]}
        elif [ ${splitsize} -eq 3 ]
        then
            numProcesses=${splitArg[2]}
            processLocation=${splitArg[1]}
        fi

        # start processes
        broker=${splitArg[0]}
        file=${TDIR}/${broker}.php
        c=1
        if [ $numProcesses -eq 0 ]; then
            if [ -f ${file} -a -s ${file} ]; then
                nohup php -f ${file} ${processLocation} 2>&1 &
                pid=$!
#echo "1: nohup php -f ${file} ${processLocation}"
#echo "1: ${PDIR}${broker}.${c} has PID: ${pid}"
                echo ${pid} > "${PDIR}${broker}.${processLocation}"
                c=$((c+1))
            fi
        else
#            echo "Starting ${file} ${numProcesses} times..."
            for (( i=0; i<${numProcesses}; i++ ));
            do
                if [ -f ${file} -a -s ${file} ]; then
                    nohup php -f ${file} ${processLocation} 2>&1 &
                    pid=$!
#echo "2: nohup php -f ${file} ${processLocation}"
#echo "2: ${PDIR}${broker}.${c} has PID: ${pid}"
                    echo ${pid} > "${PDIR}${broker}.${processLocation}.${c}"
                    c=$((c+1))
                else
                    echo "${file} was not found"
                fi
            done
        fi
    done
fi