akka

#!/bin/bash

helpCluster() {
  echo "Cluster commands are used to start, stop, view status, and open the Akka cluster dashboard."
  echo
  echo "./akka cluster start N | stop | status | dashboard [N]"
  echo "./akka cluster start [N]      # Starts one or more cluster nodes as specified by [N] or default 9, which must be 1-9."
  echo "./akka cluster stop           # Stops all currently cluster nodes."
  echo "./akka cluster status         # Shows an Akka Management view of the cluster status/state."
  echo "./akka cluster dashboard [N]  # Opens an Akka cluster dashboard web page hosted on the specified [N] or default 1, which must be 1-9."
  echo "./akka cluster viewer [N]     # Opens an Akka cluster sharding viewer web page hosted on the specified [N] or default 1, which must be 1-9."
}

helpNode() {
  echo "Node commands are used to start, stop, kill, down, or tail the log of cluster nodes."
  echo "Nodes are started on port 255N and management port 855N, N is the node number 1-9."
  echo
  echo "./akka node start N | stop N | kill N | down N | tail N"
  echo "./akka node start N...  # Start one or more cluster nodes for nodes 1-9."
  echo "./akka node stop N...   # Stop one or more cluster nodes for nodes 1-9."
  echo "./akka node kill N...   # Kill (kill -9) one or more cluster nodes for nodes 1-9."
  echo "./akka node down N...   # Down one or more cluster nodes for nodes 1-9."
  echo "./akka node tail N      # Tail the log file of the specified cluster node for nodes 1-9."
}

helpNet() {
  echo "Net commands are used to block and unblock network access to cluster nodes."
  echo
  echo "./akka net block N | unblock | view | enable | disable | partition"
  echo "./akka net block N...  # Block network access to node ports, ports 255N, nodes N 1-9."
  echo "./akka net unblock     # Reset the network blocking rules."
  echo "./akka net view        # View the current network blocking rules."
  echo "./akka net enable      # Enable packet filtering, which enables blocking network access to cluster nodes. (OSX only)"
  echo "./akka net disable     # Disable packet filtering, which disables blocking network access to cluster nodes. (OSX only)"
  echo "./akka net localhost2  # Create or remove IP alias 127.0.0.2"
  echo "./akka net partition   # Partition 127.0.0.2 on or off"
}

helpAll() {
  echo "This CLI is used to start, stop and view the dashboard 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 built by this project's Maven POM file."
  echo
  helpCluster
  echo
  helpNode
  echo
  helpNet
}

clusterCommand() {
  command=$1
  argument=$2

  case $command in
    "start")
      "$scriptPath"/cluster-start $argument
      ;;
    "stop")
      "$scriptPath"/cluster-stop
      ;;
    "status")
      "$scriptPath"/cluster-status
      ;;
    "dashboard")
      "$scriptPath"/cluster-dashboard $argument
      ;;
    "viewer")
      "$scriptPath"/cluster-viewer $argument
      ;;
    *)
      echo "Invalid subcommand '$command'"
      echo
      helpCluster
      ;;
  esac
}

nodeCommand() {
  command=$1
  shift
  arguments=$@

  case $command in
    "start")
      "$scriptPath"/node-start $arguments
      ;;
    "stop")
      "$scriptPath"/node-stop $arguments
      ;;
    "kill")
      "$scriptPath"/node-kill $arguments
      ;;
    "down")
      "$scriptPath"/node-down $arguments
      ;;
    "tail")
      "$scriptPath"/node-tail $arguments
      ;;
    *)
      echo "Invalid subcommand '$command'"
      echo
      helpNode
      ;;
  esac
}

netCommand() {
  command=$1
  shift
  arguments=$@

  case $command in
    "enable")
      "$scriptPath"/net-enable
      ;;
    "disable")
      "$scriptPath"/net-disable
      ;;
    "block")
      "$scriptPath"/net-block $arguments
      ;;
    "unblock")
      "$scriptPath"/net-unblock $arguments
      ;;
    "localhost2")
      "$scriptPath"/net-localhost2 $arguments
      ;;
    "partition")
      "$scriptPath"/net-partition $arguments
      ;;
    "view")
      "$scriptPath"/net-view $arguments
      ;;
    *)
      echo "Invalid subcommand '$command'"
      echo
      helpNet
      ;;
  esac
}

parseCommand() {
  command=$1
  subCommand=$2
  shift
  shift
  arguments=$@

  case $command in
    "cluster")
      clusterCommand "$subCommand" $arguments
      ;;
    "node")
      nodeCommand "$subCommand" $arguments
      ;;
    "net")
      netCommand "$subCommand" $arguments
      ;;
    *)
      echo "Invalid command '$command'"
      echo
      helpAll
      ;;
  esac
}

scriptPath=$(dirname "$0")

if [ $# -eq 0 ] ; then
  helpAll
else
  command=$1
  subCommand=$2
  shift
  shift
  parseCommand "$command" "$subCommand" $@
fi