Added ability to set the interval to 0 to allow the script to exit af…

…ter one run.

README.md

@@ -19,10 +19,11 @@ This script was written to provide stock price to a MQTT sensor in the [HomeAssi
 
 ## Run
 
-This script is meant to run with something like supervisord, but can be executed manually and will stay running until killed.
+This script is meant to run with something like supervisord, and has a default interval of 3600 seconds (1 hour). If you want to have this script to update your stocks continiously set the interval greater than zero. If interval is set to 0 the script will exit after running once. If you want to have cron or some other system mange the script execution then simply set the interval to 0 in the .env 
 
 There is a brief write up about the specific use case I built this for at [https://slackerlabs.org/2019/03/08/home-assistant-alpha-vantage/]
 
+
 ## Features
 * This script publishes stock price to topic `stock/<stock_name>/price`
 * This script utilizes the `get_batch_stock_quotes` method of the Alpha Vantage API to reduce the number of calls to the API to avoid hitting the API more than once a second.

alpha_vantage_to_mqtt.py

@@ -9,6 +9,7 @@
 import os
 import time
 import json
+import sys
 import paho.mqtt.client as mqtt
 from alpha_vantage.timeseries import TimeSeries
 from alpha_vantage.foreignexchange import ForeignExchange
@@ -111,8 +112,14 @@ def main(interval):
 		if http_event_collector_key:
 			splunkIt(records,symbols,total_elapsed_time,api_call_time)
 		if app_mode == 'debug':
-			print("Script Completed...time to sleep for {} seconds\n".format(interval))
-		time.sleep(interval)
+			print("Script Completed...")
+		if interval > 0:
+			print("Time to sleep for {} seconds\n".format(interval))
+			time.sleep(interval)
+		else:
+			if app_mode == 'debug':
+				print("No Interval set...exiting...\n")
+			sys.exit()
 
 if __name__ == "__main__":
     main(interval)

env-sample

@@ -12,7 +12,7 @@ api_key='<my_alpha_vantag_key>'
 # Comma delimited list of stocks you want to monitor
 stocks=GOOG,AMZN,APPL,FB
 
-# Interval, in seconds, you want to run the updates. 3600 = 1 hour.  
+# Interval, in seconds, you want to run the updates. 3600 = 1 hour. If you set inteval to 0 the script will exit after running once.  
 interval=3600 
 
 # Splunk Server: