def list_subscriptions(stub, topic):
"""Lists topics in the given project."""
req = pubsub_pb2.ListTopicSubscriptionsRequest(topic=topic, page_size=1)
try:
resp = stub.ListTopicSubscriptions(req, TIMEOUT)
for t in resp.subscriptions:
print("Subscription is: {}".format(t))
except NetworkError, e:
logging.warning('Failed to list topics: {}'.format(e))
sys.exit(1)
def list_topic_subscriptions(self, topic, page_size=0, options=None):
"""
Lists the name of the subscriptions for this topic.
Example:
>>> from google.cloud.gapic.pubsub.v1 import publisher_api
>>> from google.gax import CallOptions, INITIAL_PAGE
>>> api = publisher_api.PublisherApi()
>>> topic = api.topic_path('[PROJECT]', '[TOPIC]')
>>>
>>> # Iterate over all results
>>> for element in api.list_topic_subscriptions(topic):
>>> # process element
>>> pass
>>>
>>> # Or iterate over results one page at a time
>>> for page in api.list_topic_subscriptions(topic, options=CallOptions(page_token=INITIAL_PAGE)):
>>> for element in page:
>>> # process element
>>> pass
Args:
topic (string): The name of the topic that subscriptions are attached to.
page_size (int): The maximum number of resources contained in the
underlying API response. If page streaming is performed per-
resource, this parameter does not affect the return value. If page
streaming is performed per-page, this determines the maximum number
of resources in a page.
options (:class:`google.gax.CallOptions`): Overrides the default
settings for this call, e.g, timeout, retries etc.
Returns:
A :class:`google.gax.PageIterator` instance. By default, this
is an iterable of string instances.
This object can also be configured to iterate over the pages
of the response through the `CallOptions` parameter.
Raises:
:exc:`google.gax.errors.GaxError` if the RPC is aborted.
:exc:`ValueError` if the parameters are invalid.
"""
request = pubsub_pb2.ListTopicSubscriptionsRequest(topic=topic,
page_size=page_size)
return self._list_topic_subscriptions(request, options)