Centos 7: Auto restart application if it stopped

I want to auto restart my application "Fiware IoT Agent" if it stopped, the problem is that it depends of Mongo Db Data Base and the Mosquitto broker. My OS is centOS 7

Here is the commands that I use to launch my three application in the following order:

*Mongo:

/usr/local/iot/mongodb-linux-x86_64-3.0.5/bin/mongod --dbpath /usr/local/iot/mongodb-linux-x86_64-3.0.5/data/db$

*Mosquitto broker

/usr/sbin/mosquitto -c /etc/iot/mosquitto.conf &
pid=$!
echo $pid > /var/run/iot/mosquitto.pid

Iot Agent:

than I start my application using this command

export LD_LIBRARY_PATH=/usr/local/iot/lib
/usr/local/iot/bin/iotagent -i 192.168.1.11 -p 80 -v DEBUG -d /usr/local/iot/lib -c /etc/iot/config.json

how can I start my application if it stopped known that it depends of the other two application? If for example Mongo DB stopped, I must be able to restart it and then to restart my application.