Subscription(mapping=None, *, ignore_unknown_fields=False, **kwargs)A subscription resource. If none of push_config,
bigquery_config, or cloud_storage_config is set, then the
subscriber will pull and ack messages using API methods. At most one
of these fields may be set.
Attributes | |
|---|---|
| Name | Description |
name |
str
Required. The name of the subscription. It must have the format "projects/{project}/subscriptions/{subscription}".
{subscription} must start with a letter, and contain
only letters ([A-Za-z]), numbers ([0-9]), dashes
(-), underscores (_), periods (.), tildes
(), plus (`+) or percent signs (%`). It must be
between 3 and 255 characters in length, and it must not
start with "goog".
|
topic |
str
Required. The name of the topic from which this subscription is receiving messages. Format is projects/{project}/topics/{topic}. The value of this
field will be _deleted-topic_ if the topic has been
deleted.
|
push_config |
google.pubsub_v1.types.PushConfig
If push delivery is used with this subscription, this field is used to configure it. |
bigquery_config |
google.pubsub_v1.types.BigQueryConfig
If delivery to BigQuery is used with this subscription, this field is used to configure it. |
cloud_storage_config |
google.pubsub_v1.types.CloudStorageConfig
If delivery to Google Cloud Storage is used with this subscription, this field is used to configure it. |
ack_deadline_seconds |
int
The approximate amount of time (on a best-effort basis) Pub/Sub waits for the subscriber to acknowledge receipt before resending the message. In the interval after the message is delivered and before it is acknowledged, it is considered to be *outstanding*. During that time period, the message will not be redelivered (on a best-effort basis). For pull subscriptions, this value is used as the initial value for the ack deadline. To override this value for a given message, call ModifyAckDeadline with the
corresponding ack_id if using non-streaming pull or send
the ack_id in a StreamingModifyAckDeadlineRequest if
using streaming pull. The minimum custom deadline you can
specify is 10 seconds. The maximum custom deadline you can
specify is 600 seconds (10 minutes). If this parameter is 0,
a default value of 10 seconds is used.
For push delivery, this value is also used to set the
request timeout for the call to the push endpoint.
If the subscriber never acknowledges the message, the
Pub/Sub system will eventually redeliver the message.
|
retain_acked_messages |
bool
Indicates whether to retain acknowledged messages. If true, then messages are not expunged from the subscription's backlog, even if they are acknowledged, until they fall out of the message_retention_duration window. This must be
true if you would like to [Seek to a timestamp]
(https://cloud.google.com/pubsub/docs/replay-overview#seek_to_a_time)
in the past to replay previously-acknowledged messages.
|
message_retention_duration |
google.protobuf.duration_pb2.Duration
How long to retain unacknowledged messages in the subscription's backlog, from the moment a message is published. If retain_acked_messages is true, then this
also configures the retention of acknowledged messages, and
thus configures how far back in time a Seek can be done.
Defaults to 7 days. Cannot be more than 7 days or less than
10 minutes.
|
labels |
MutableMapping[str, str]
See `Creating and managing labels |
enable_message_ordering |
bool
If true, messages published with the same ordering_key
in PubsubMessage will be delivered to the subscribers in
the order in which they are received by the Pub/Sub system.
Otherwise, they may be delivered in any order.
|
expiration_policy |
google.pubsub_v1.types.ExpirationPolicy
A policy that specifies the conditions for this subscription's expiration. A subscription is considered active as long as any connected subscriber is successfully consuming messages from the subscription or is issuing operations on the subscription. If expiration_policy is
not set, a *default policy* with ttl of 31 days will be
used. The minimum allowed value for
expiration_policy.ttl is 1 day. If expiration_policy
is set, but expiration_policy.ttl is not set, the
subscription never expires.
|
filter |
str
An expression written in the Pub/Sub `filter language |
dead_letter_policy |
google.pubsub_v1.types.DeadLetterPolicy
A policy that specifies the conditions for dead lettering messages in this subscription. If dead_letter_policy is not set, dead lettering is disabled. The Cloud Pub/Sub service account associated with this subscriptions's parent project (i.e., service-{project_number}@gcp-sa-pubsub.iam.gserviceaccount.com) must have permission to Acknowledge() messages on this subscription. |
retry_policy |
google.pubsub_v1.types.RetryPolicy
A policy that specifies how Pub/Sub retries message delivery for this subscription. If not set, the default retry policy is applied. This generally implies that messages will be retried as soon as possible for healthy subscribers. RetryPolicy will be triggered on NACKs or acknowledgement deadline exceeded events for a given message. |
detached |
bool
Indicates whether the subscription is detached from its topic. Detached subscriptions don't receive messages from their topic and don't retain any backlog. Pull and
StreamingPull requests will return FAILED_PRECONDITION.
If the subscription is a push subscription, pushes to the
endpoint will not be made.
|
enable_exactly_once_delivery |
bool
If true, Pub/Sub provides the following guarantees for the delivery of a message with a given value of message_id
on this subscription:
- The message sent to a subscriber is guaranteed not to be
resent before the message's acknowledgement deadline
expires.
- An acknowledged message will not be resent to a
subscriber.
Note that subscribers may still receive multiple copies of a
message when enable_exactly_once_delivery is true if the
message was published multiple times by a publisher client.
These copies are considered distinct by Pub/Sub and have
distinct message_id values.
|
topic_message_retention_duration |
google.protobuf.duration_pb2.Duration
Output only. Indicates the minimum duration for which a message is retained after it is published to the subscription's topic. If this field is set, messages published to the subscription's topic in the last topic_message_retention_duration are always available to
subscribers. See the message_retention_duration field in
Topic. This field is set only in responses from the
server; it is ignored if it is set in any requests.
|
state |
google.pubsub_v1.types.Subscription.State
Output only. An output-only field indicating whether or not the subscription can receive messages. |
Classes
LabelsEntry
LabelsEntry(mapping=None, *, ignore_unknown_fields=False, **kwargs)The abstract base class for a message.
| Parameters | |
|---|---|
| Name | Description |
kwargs |
dict
Keys and values corresponding to the fields of the message. |
mapping |
Union[dict,
A dictionary or message to be used to determine the values for this message. |
ignore_unknown_fields |
Optional(bool)
If True, do not raise errors for unknown fields. Only applied if |
State
State(value)Possible states for a subscription.
Values: STATE_UNSPECIFIED (0): Default value. This value is unused. ACTIVE (1): The subscription can actively receive messages RESOURCE_ERROR (2): The subscription cannot receive messages because of an error with the resource to which it pushes messages. See the more detailed error state in the corresponding configuration.