services

#!/bin/bash
#
#	Command Line Interface to start all services associated with the Getting-Started Tutorial
#
#	For this tutorial the commands are merely a convenience script to run docker-compose
#

set -e

ORION="http://orion:1026/version"
CONTEXT="http://csv-agent:3000/data-models/ngsi-context.jsonld"

if (( $# != 1 )); then
	echo "Illegal number of parameters"
	echo "usage: services [create|start|stop]"
	exit 1
fi

pause(){
	printf " "
	count="$1"
	[ "$count" -gt 59 ] && printf "Waiting one minute " || printf " Waiting a few seconds ";
	while [ "$count" -gt 0 ]
	do
		printf "."
		sleep 3
		count=$((count - 3))
	done
	echo ""
}

getHeartbeat(){
	eval "response=$(docker run --network fiware_default --rm curlimages/curl -s -o /dev/null -w "%{http_code}" "$1")"
}

waitForOrion () {
	echo -e "\n⏳ Waiting for \033[1;34mOrion-LD\033[0m to be available\n"
	getHeartbeat "${ORION}"
	while [ "${response}" -eq 000 ]
	do
		echo -e "\nContext Broker HTTP state: ${response} (waiting for 200)"
		pause 6
		getHeartbeat "${ORION}"
	done
}


waitForContext () {
	echo -e "\n⏳ Waiting for \033[1m@context\033[0m to be available\n"
	getHeartbeat "${CONTEXT}"
	while [ "${response}" -eq 000 ]
	do
		echo -e "\n@context HTTP state: ${response} (waiting for 200)"
		pause 3
		getHeartbeat "${CONTEXT}"
	done
}

stoppingContainers () {
	echo "Stopping containers"
	docker-compose --log-level ERROR -p fiware down -v --remove-orphans
}

addDatabaseIndex () {
	printf "Create \033[1mMongoDB\033[0m database indexes ..."
	docker exec db-mongo mongo --eval '
	conn = new Mongo();db.createCollection("orion");
	db = conn.getDB("orion");
	db.createCollection("entities");
	db.entities.createIndex({"_id.servicePath": 1, "_id.id": 1, "_id.type": 1}, {unique: true});
	db.entities.createIndex({"_id.type": 1});
	db.entities.createIndex({"_id.id": 1});' > /dev/null
	echo -e " \033[1;32mdone\033[0m"
}

displayServices () {
	echo ""
	docker ps --format "table {{.Names}}\t{{.Status}}\t{{.Ports}}" --filter name="$1"-*
	echo ""
}

command="$1"
case "${command}" in
	"help")
		echo "usage: services [create|orion|scorpio|stop]"
		;;
	"start")
		stoppingContainers
		echo -e "Starting three containers \033[1;34mOrion-LD\033[0m, \033[1;30mCSV-Agent\033[0m and a \033[1;30mMongoDB\033[0m database."
		echo -e "- \033[1;34mOrion-LD\033[0m is the context broker"
		echo ""
		docker-compose --log-level ERROR -p fiware up -d --remove-orphans
		addDatabaseIndex
		displayServices
		waitForOrion
		waitForContext
		;;
	"stop")
		stoppingContainers
		;;
	"create")
		echo "Pulling Docker images"
		docker-compose --log-level ERROR  pull
		;;
	*)
		echo "Command not Found."
		echo "usage: services [create|start|stop]"
		exit 127;
		;;
esac