Cloud PubSub V1 Client - Class Subscription (1.50.0)

Reference documentation and code samples for the Cloud PubSub V1 Client class Subscription.

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.

Generated from protobuf message google.pubsub.v1.Subscription

Namespace

Google \ Cloud \ PubSub \ V1

Methods

__construct

Constructor.

Parameters
NameDescription
data array

Optional. Data for populating the Message object.

↳ name string

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 string

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\Cloud\PubSub\V1\PushConfig

If push delivery is used with this subscription, this field is used to configure it.

↳ bigquery_config Google\Cloud\PubSub\V1\BigQueryConfig

If delivery to BigQuery is used with this subscription, this field is used to configure it.

↳ cloud_storage_config Google\Cloud\PubSub\V1\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 in the past to replay previously-acknowledged messages.

↳ message_retention_duration Google\Protobuf\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 array|Google\Protobuf\Internal\MapField

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\Cloud\PubSub\V1\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 string

An expression written in the Pub/Sub filter language. If non-empty, then only PubsubMessages whose attributes field matches the filter are delivered on this subscription. If empty, then no messages are filtered out.

↳ dead_letter_policy Google\Cloud\PubSub\V1\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\Cloud\PubSub\V1\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

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 int

Output only. An output-only field indicating whether or not the subscription can receive messages.

getName

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".

Returns
TypeDescription
string

setName

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".

Parameter
NameDescription
var string
Returns
TypeDescription
$this

getTopic

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.

Returns
TypeDescription
string

setTopic

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.

Parameter
NameDescription
var string
Returns
TypeDescription
$this

getPushConfig

If push delivery is used with this subscription, this field is used to configure it.

Returns
TypeDescription
Google\Cloud\PubSub\V1\PushConfig|null

hasPushConfig

clearPushConfig

setPushConfig

If push delivery is used with this subscription, this field is used to configure it.

Parameter
NameDescription
var Google\Cloud\PubSub\V1\PushConfig
Returns
TypeDescription
$this

getBigqueryConfig

If delivery to BigQuery is used with this subscription, this field is used to configure it.

Returns
TypeDescription
Google\Cloud\PubSub\V1\BigQueryConfig|null

hasBigqueryConfig

clearBigqueryConfig

setBigqueryConfig

If delivery to BigQuery is used with this subscription, this field is used to configure it.

Parameter
NameDescription
var Google\Cloud\PubSub\V1\BigQueryConfig
Returns
TypeDescription
$this

getCloudStorageConfig

If delivery to Google Cloud Storage is used with this subscription, this field is used to configure it.

Returns
TypeDescription
Google\Cloud\PubSub\V1\CloudStorageConfig|null

hasCloudStorageConfig

clearCloudStorageConfig

setCloudStorageConfig

If delivery to Google Cloud Storage is used with this subscription, this field is used to configure it.

Parameter
NameDescription
var Google\Cloud\PubSub\V1\CloudStorageConfig
Returns
TypeDescription
$this

getAckDeadlineSeconds

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.

Returns
TypeDescription
int

setAckDeadlineSeconds

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.

Parameter
NameDescription
var int
Returns
TypeDescription
$this

getRetainAckedMessages

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 in the past to replay previously-acknowledged messages.

Returns
TypeDescription
bool

setRetainAckedMessages

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 in the past to replay previously-acknowledged messages.

Parameter
NameDescription
var bool
Returns
TypeDescription
$this

getMessageRetentionDuration

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.

Returns
TypeDescription
Google\Protobuf\Duration|null

hasMessageRetentionDuration

clearMessageRetentionDuration

setMessageRetentionDuration

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.

Parameter
NameDescription
var Google\Protobuf\Duration
Returns
TypeDescription
$this

getLabels

Returns
TypeDescription
Google\Protobuf\Internal\MapField

setLabels

Parameter
NameDescription
var array|Google\Protobuf\Internal\MapField
Returns
TypeDescription
$this

getEnableMessageOrdering

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.

Returns
TypeDescription
bool

setEnableMessageOrdering

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.

Parameter
NameDescription
var bool
Returns
TypeDescription
$this

getExpirationPolicy

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.

Returns
TypeDescription
Google\Cloud\PubSub\V1\ExpirationPolicy|null

hasExpirationPolicy

clearExpirationPolicy

setExpirationPolicy

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.

Parameter
NameDescription
var Google\Cloud\PubSub\V1\ExpirationPolicy
Returns
TypeDescription
$this

getFilter

An expression written in the Pub/Sub filter language. If non-empty, then only PubsubMessages whose attributes field matches the filter are delivered on this subscription. If empty, then no messages are filtered out.

Returns
TypeDescription
string

setFilter

An expression written in the Pub/Sub filter language. If non-empty, then only PubsubMessages whose attributes field matches the filter are delivered on this subscription. If empty, then no messages are filtered out.

Parameter
NameDescription
var string
Returns
TypeDescription
$this

getDeadLetterPolicy

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.

Returns
TypeDescription
Google\Cloud\PubSub\V1\DeadLetterPolicy|null

hasDeadLetterPolicy

clearDeadLetterPolicy

setDeadLetterPolicy

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.

Parameter
NameDescription
var Google\Cloud\PubSub\V1\DeadLetterPolicy
Returns
TypeDescription
$this

getRetryPolicy

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.

Returns
TypeDescription
Google\Cloud\PubSub\V1\RetryPolicy|null

hasRetryPolicy

clearRetryPolicy

setRetryPolicy

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.

Parameter
NameDescription
var Google\Cloud\PubSub\V1\RetryPolicy
Returns
TypeDescription
$this

getDetached

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.

Returns
TypeDescription
bool

setDetached

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.

Parameter
NameDescription
var bool
Returns
TypeDescription
$this

getEnableExactlyOnceDelivery

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.

Returns
TypeDescription
bool

setEnableExactlyOnceDelivery

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.

Parameter
NameDescription
var bool
Returns
TypeDescription
$this

getTopicMessageRetentionDuration

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.

Returns
TypeDescription
Google\Protobuf\Duration|null

hasTopicMessageRetentionDuration

clearTopicMessageRetentionDuration

setTopicMessageRetentionDuration

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.

Parameter
NameDescription
var Google\Protobuf\Duration
Returns
TypeDescription
$this

getState

Output only. An output-only field indicating whether or not the subscription can receive messages.

Returns
TypeDescription
int

setState

Output only. An output-only field indicating whether or not the subscription can receive messages.

Parameter
NameDescription
var int
Returns
TypeDescription
$this

static::build

Parameters
NameDescription
name string

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 string

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. Please see Google\Cloud\PubSub\V1\SubscriberClient::topicName() for help formatting this field.

pushConfig Google\Cloud\PubSub\V1\PushConfig

If push delivery is used with this subscription, this field is used to configure it.

ackDeadlineSeconds 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.

Returns
TypeDescription
Google\Cloud\PubSub\V1\Subscription