Reference documentation and code samples for the Cloud PubSub V1 Client class DeadLetterPolicy.
Dead lettering is done on a best effort basis. The same message might be dead lettered multiple times.
If validation on any of the fields fails at subscription creation/updation, the create/update subscription request will fail.
Generated from protobuf message google.pubsub.v1.DeadLetterPolicy
Namespace
Google \ Cloud \ PubSub \ V1Methods
__construct
Constructor.
| Parameters | |
|---|---|
| Name | Description |
data |
array
Optional. Data for populating the Message object. |
↳ dead_letter_topic |
string
Optional. The name of the topic to which dead letter messages should be published. Format is |
↳ max_delivery_attempts |
int
Optional. The maximum number of delivery attempts for any message. The value must be between 5 and 100. The number of delivery attempts is defined as 1 + (the sum of number of NACKs and number of times the acknowledgement deadline has been exceeded for the message). A NACK is any call to ModifyAckDeadline with a 0 deadline. Note that client libraries may automatically extend ack_deadlines. This field will be honored on a best effort basis. If this parameter is 0, a default value of 5 is used. |
getDeadLetterTopic
Optional. The name of the topic to which dead letter messages should be
published. Format is projects/{project}/topics/{topic}.The Pub/Sub
service account associated with the enclosing subscription's parent project
(i.e., service-{project_number}@gcp-sa-pubsub.iam.gserviceaccount.com) must
have permission to Publish() to this topic.
The operation will fail if the topic does not exist. Users should ensure that there is a subscription attached to this topic since messages published to a topic with no subscriptions are lost.
| Returns | |
|---|---|
| Type | Description |
string |
|
setDeadLetterTopic
Optional. The name of the topic to which dead letter messages should be
published. Format is projects/{project}/topics/{topic}.The Pub/Sub
service account associated with the enclosing subscription's parent project
(i.e., service-{project_number}@gcp-sa-pubsub.iam.gserviceaccount.com) must
have permission to Publish() to this topic.
The operation will fail if the topic does not exist. Users should ensure that there is a subscription attached to this topic since messages published to a topic with no subscriptions are lost.
| Parameter | |
|---|---|
| Name | Description |
var |
string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getMaxDeliveryAttempts
Optional. The maximum number of delivery attempts for any message. The value must be between 5 and 100.
The number of delivery attempts is defined as 1 + (the sum of number of NACKs and number of times the acknowledgement deadline has been exceeded for the message). A NACK is any call to ModifyAckDeadline with a 0 deadline. Note that client libraries may automatically extend ack_deadlines. This field will be honored on a best effort basis. If this parameter is 0, a default value of 5 is used.
| Returns | |
|---|---|
| Type | Description |
int |
|
setMaxDeliveryAttempts
Optional. The maximum number of delivery attempts for any message. The value must be between 5 and 100.
The number of delivery attempts is defined as 1 + (the sum of number of NACKs and number of times the acknowledgement deadline has been exceeded for the message). A NACK is any call to ModifyAckDeadline with a 0 deadline. Note that client libraries may automatically extend ack_deadlines. This field will be honored on a best effort basis. If this parameter is 0, a default value of 5 is used.
| Parameter | |
|---|---|
| Name | Description |
var |
int
|
| Returns | |
|---|---|
| Type | Description |
$this |
|