def poll():
""" Callback function that polls for new tasks based on a schedule. """
logging.info("Polling for new task.")
deployment_id = helper.get_deployment_id()
# If the deployment is not registered, skip.
if not deployment_id:
return
# Send request to AppScale Portal.
url = "{0}{1}".format(hermes_constants.PORTAL_URL,
hermes_constants.PORTAL_POLL_PATH)
data = json.dumps({ JSONTags.DEPLOYMENT_ID: deployment_id })
request = helper.create_request(url=url, method='POST', body=data)
response = helper.urlfetch(request)
try:
data = json.loads(response.body)
except (TypeError, ValueError) as error:
logging.error("Cannot parse response from url '{0}'. Error: {1}".
format(url, str(error)))
return
# Verify all necessary fields are present in the request.
if not set(data.keys()).issuperset(set(hermes_constants.REQUIRED_KEYS)) or \
None in data.values():
logging.error("Missing args in response: {0}".format(response))
return
logging.debug("Task to run: {0}".format(data))
logging.info("Redirecting task request to TaskHandler.")
url = "{0}{1}".format(hermes_constants.HERMES_URL, TaskHandler.PATH)
request = helper.create_request(url, method='POST', body=data)
# The poller can move forward without waiting for a response here.
helper.urlfetch_async(request)
def poll():
""" Callback function that polls for new tasks based on a schedule. """
deployment_id = helper.get_deployment_id()
# If the deployment is not registered, skip.
if not deployment_id:
return
# If we can't reach the backup and recovery services, skip.
nodes = helper.get_node_info()
http_client = tornado.httpclient.HTTPClient()
for node in nodes:
br_host = node[helper.NodeInfoTags.HOST]
request = tornado.httpclient.HTTPRequest(br_host)
try:
response = http_client.fetch(request)
if json.loads(response.body)['status'] != 'up':
logging.warn('Backup and Recovery service at {} is not up.'
.format(br_host))
return
except (socket.error, ValueError):
logging.exception('Backup and Recovery service at {} is not up.'
.format(br_host))
return
logging.info("Polling for new task.")
# Send request to AppScale Portal.
url = "{0}{1}".format(hermes_constants.PORTAL_URL,
hermes_constants.PORTAL_POLL_PATH)
data = urllib.urlencode({JSONTags.DEPLOYMENT_ID: deployment_id})
request = helper.create_request(url=url, method='POST', body=data)
response = helper.urlfetch(request)
if not response[JSONTags.SUCCESS]:
logging.error("Inaccessible resource: {}".format(url))
return
try:
data = json.loads(response[JSONTags.BODY])
except (TypeError, ValueError) as error:
logging.error("Cannot parse response from url '{0}'. Error: {1}".
format(url, str(error)))
return
if data == {}: # If there's no task to perform.
return
# Verify all necessary fields are present in the request.
if not set(data.keys()).issuperset(set(hermes_constants.REQUIRED_KEYS)):
logging.error("Missing args in response: {0}".format(response))
return
logging.debug("Task to run: {0}".format(data))
logging.info("Redirecting task request to TaskHandler.")
url = "{0}{1}".format(hermes_constants.HERMES_URL, TaskHandler.PATH)
request = helper.create_request(url, method='POST', body=json.dumps(data))
# The poller can move forward without waiting for a response here.
helper.urlfetch_async(request)
def poll():
""" Callback function that polls for new tasks based on a schedule. """
deployment_id = helper.get_deployment_id()
# If the deployment is not registered, skip.
if not deployment_id:
return
# If we can't reach the backup and recovery services, skip.
nodes = helper.get_node_info()
http_client = tornado.httpclient.HTTPClient()
for node in nodes:
br_host = node[helper.NodeInfoTags.HOST]
request = tornado.httpclient.HTTPRequest(br_host)
try:
response = http_client.fetch(request)
if json.loads(response.body)['status'] != 'up':
logging.warn('Backup and Recovery service at {} is not up.'
.format(br_host))
return
except (socket.error, ValueError):
logging.exception('Backup and Recovery service at {} is not up.'
.format(br_host))
return
logging.info("Polling for new task.")
# Send request to AppScale Portal.
url = "{0}{1}".format(hermes_constants.PORTAL_URL,
hermes_constants.PORTAL_POLL_PATH)
data = urllib.urlencode({JSONTags.DEPLOYMENT_ID: deployment_id})
request = helper.create_request(url=url, method='POST', body=data)
response = helper.urlfetch(request)
if not response[JSONTags.SUCCESS]:
logging.error("Inaccessible resource: {}".format(url))
return
try:
data = json.loads(response[JSONTags.BODY])
except (TypeError, ValueError) as error:
logging.error("Cannot parse response from url '{0}'. Error: {1}".
format(url, str(error)))
return
if data == {}: # If there's no task to perform.
return
# Verify all necessary fields are present in the request.
if not set(data.keys()).issuperset(set(hermes_constants.REQUIRED_KEYS)):
logging.error("Missing args in response: {0}".format(response))
return
logging.debug("Task to run: {0}".format(data))
logging.info("Redirecting task request to TaskHandler.")
url = "{0}{1}".format(hermes_constants.HERMES_URL, TaskHandler.PATH)
request = helper.create_request(url, method='POST', body=json.dumps(data))
# The poller can move forward without waiting for a response here.
helper.urlfetch_async(request)
def poll():
""" Callback function that polls for new tasks based on a schedule. """
logging.info("Polling for new task.")
deployment_id = helper.get_deployment_id()
# If the deployment is not registered, skip.
if not deployment_id:
return
# Send request to AppScale Portal.
url = "{0}{1}".format(hermes_constants.PORTAL_URL,
hermes_constants.PORTAL_POLL_PATH)
data = json.dumps({JSONTags.DEPLOYMENT_ID: deployment_id})
request = helper.create_request(url=url, method='POST', body=data)
response = helper.urlfetch(request)
try:
data = json.loads(response.body)
except (TypeError, ValueError) as error:
logging.error(
"Cannot parse response from url '{0}'. Error: {1}".format(
url, str(error)))
return
# Verify all necessary fields are present in the request.
if not set(data.keys()).issuperset(set(hermes_constants.REQUIRED_KEYS)) or \
None in data.values():
logging.error("Missing args in response: {0}".format(response))
return
logging.debug("Task to run: {0}".format(data))
logging.info("Redirecting task request to TaskHandler.")
url = "{0}{1}".format(hermes_constants.HERMES_URL, TaskHandler.PATH)
request = helper.create_request(url, method='POST', body=data)
# The poller can move forward without waiting for a response here.
helper.urlfetch_async(request)
