Watch stream task

Watch stream task

In order to make sure the Twitter stream is running, a period job can be run with

rake scheduler:watch_stream

This task will check if the stream activity is normal by pinging crowdbreaks-streamer and checking the health of Redis and Elasticsearch. The messages can be disabled by setting the WATCH_STREAM environment variable to false. In case of errors an email will be sent to the email address set in WATCH_STREAM_WARNING_EMAIL. After an email has been sent, no emails will be sent for a duration of 6h.