34 lines
1.4 KiB
Python
34 lines
1.4 KiB
Python
from xmodule.modulestore.django import modulestore
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from dogapi import dog_stats_api
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from util.json_request import JsonResponse
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from django.db import connection
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from django.db.utils import DatabaseError
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from xmodule.exceptions import HeartbeatFailure
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@dog_stats_api.timed('edxapp.heartbeat')
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def heartbeat(request):
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"""
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Simple view that a loadbalancer can check to verify that the app is up. Returns a json doc
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of service id: status or message. If the status for any service is anything other than True,
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it returns HTTP code 503 (Service Unavailable); otherwise, it returns 200.
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"""
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# This refactoring merely delegates to the default modulestore (which if it's mixed modulestore will
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# delegate to all configured modulestores) and a quick test of sql. A later refactoring may allow
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# any service to register itself as participating in the heartbeat. It's important that all implementation
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# do as little as possible but give a sound determination that they are ready.
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try:
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output = modulestore().heartbeat()
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except HeartbeatFailure as fail:
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return JsonResponse({fail.service: unicode(fail)}, status=503)
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cursor = connection.cursor()
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try:
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cursor.execute("SELECT CURRENT_DATE")
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cursor.fetchone()
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output['SQL'] = True
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except DatabaseError as fail:
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return JsonResponse({'SQL': unicode(fail)}, status=503)
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return JsonResponse(output)
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