mosquitto2puml.sh

mosquitto2puml.sh

#!/bin/bash
#
# How to use:
# ./mosquitto2puml.sh > mosquitto.puml
# PLANTUML_LIMIT_SIZE=8192 plantuml mosquitto.puml
#

LOG=${1:-/var/log/mosquitto/mosquitto.log}

echo "@startuml"
echo "queue Mosquitto as mqtt #lightblue"
while IFS= read -r line; do
  if [[ $line =~ "Received " ]]; then
    echo $line | awk '{from=$5; msg=$3; $1=$2=$3=$4=$5=""; printf("\"%s\" -> mqtt: %s %s\n",from,msg,$0)}'
  elif [[ $line =~ "Sending " ]]; then
    echo $line | awk '{to=$5; msg=$3; $1=$2=$3=$4=$5=""; printf("mqtt -> \"%s\": %s %s\n",to,msg,$0)}'
  fi
done < $LOG
echo "@enduml"