akka

#!/bin/bash

helpCluster() {
  echo "Use the cluster command to start, stop, and view the status of Akka cluster nodes."
  echo
  echo "./akka cluster [start | stop | status]"
  echo "./akka cluster start                                          # Starts one Akka cluster."
  echo "./akka cluster stop                                           # Stops all currently cluster nodes."
  echo "./akka cluster status                                         # Shows an Akka Management view of the cluster status/state."
}

helpNode() {
  echo "Use the node command to start, stop a specific cluster node."
  echo
  echo "./akka node start [port] [role] [seed node] [kafka server]    # Start the specified cluster node."
  echo "./akka node stop [port]                                       # Stop the specified cluster node."
}

helpAll() {
  echo "This CLI is used to start, stop and monitor nodes in an Akka cluster."
  echo
  echo "These commands manage the Akka cluster as defined in this project. A cluster"
  echo "of nodes is started using the JAR file build from this project's Maven POM file."
  echo
  helpCluster
  echo
  helpNode
}

clusterCommand() {
  command=$1

  case $command in
    "start")
      $scriptPath/cluster-start
      ;;
    "stop")
      $scriptPath/cluster-stop
      ;;
    "status")
      $scriptPath/cluster-status
      ;;
    *)
      helpCluster
      ;;
  esac
}

nodeCommand() {
  command=$1
  argument="${@:2}"

  case $command in
    "start")
      $scriptPath/node-start $argument
      ;;
    "stop")
      $scriptPath/node-stop $argument
      ;;
    *)
      helpNode
      ;;
  esac
}

command() {
  command=$1
  subCommand=$2
  argument="${@:3}"
  
  case $command in
    "cluster")
      clusterCommand $subCommand
      ;;
    "node")
      nodeCommand $subCommand $argument
      ;;
    *)
      echo "Invalid command '$command'"
      echo
      helpAll
      ;;
  esac
}

scriptPath=$(dirname $0)

if [ $# -eq 0 ] ; then
  helpAll
else
  command $1 $2 "${@:3}"
fi