Struct RetryConfig 

#[non_exhaustive]
pub struct RetryConfig {
    pub max_attempts: i32,
    pub max_retry_duration: Option<Duration>,
    pub min_backoff: Option<Duration>,
    pub max_backoff: Option<Duration>,
    pub max_doublings: i32,
    /* private fields */
}

Retry config.

These settings determine when a failed task attempt is retried.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

max_attempts: i32

Number of attempts per task.

Cloud Tasks will attempt the task max_attempts times (that is, if the first attempt fails, then there will be max_attempts - 1 retries). Must be >= -1.

If unspecified when the queue is created, Cloud Tasks will pick the default.

-1 indicates unlimited attempts.

This field has the same meaning as task_retry_limit in queue.yaml/xml.

max_retry_duration: Option<Duration>

If positive, max_retry_duration specifies the time limit for retrying a failed task, measured from when the task was first attempted. Once max_retry_duration time has passed and the task has been attempted max_attempts times, no further attempts will be made and the task will be deleted.

If zero, then the task age is unlimited.

If unspecified when the queue is created, Cloud Tasks will pick the default.

max_retry_duration will be truncated to the nearest second.

This field has the same meaning as task_age_limit in queue.yaml/xml.

min_backoff: Option<Duration>

A task will be scheduled for retry between min_backoff and max_backoff duration after it fails, if the queue’s RetryConfig specifies that the task should be retried.

If unspecified when the queue is created, Cloud Tasks will pick the default.

min_backoff will be truncated to the nearest second.

This field has the same meaning as min_backoff_seconds in queue.yaml/xml.

max_backoff: Option<Duration>

A task will be scheduled for retry between min_backoff and max_backoff duration after it fails, if the queue’s RetryConfig specifies that the task should be retried.

If unspecified when the queue is created, Cloud Tasks will pick the default.

max_backoff will be truncated to the nearest second.

This field has the same meaning as max_backoff_seconds in queue.yaml/xml.

max_doublings: i32

The time between retries will double max_doublings times.

A task’s retry interval starts at min_backoff, then doubles max_doublings times, then increases linearly, and finally retries at intervals of max_backoff up to max_attempts times.

For example, if min_backoff is 10s, max_backoff is 300s, and max_doublings is 3, then the a task will first be retried in 10s. The retry interval will double three times, and then increase linearly by 2^3 * 10s. Finally, the task will retry at intervals of max_backoff until the task has been attempted max_attempts times. Thus, the requests will retry at 10s, 20s, 40s, 80s, 160s, 240s, 300s, 300s, ….

If unspecified when the queue is created, Cloud Tasks will pick the default.

This field has the same meaning as max_doublings in queue.yaml/xml.

Implementations

impl RetryConfig

pub fn new() -> Self

pub fn set_max_attempts<T: Into<i32>>(self, v: T) -> Self

Sets the value of max_attempts.

pub fn set_max_retry_duration<T>(self, v: T) -> Self

where T: Into<Duration>,

Sets the value of max_retry_duration.

pub fn set_or_clear_max_retry_duration<T>(self, v: Option<T>) -> Self

where T: Into<Duration>,

Sets or clears the value of max_retry_duration.

pub fn set_min_backoff<T>(self, v: T) -> Self

where T: Into<Duration>,

Sets the value of min_backoff.

pub fn set_or_clear_min_backoff<T>(self, v: Option<T>) -> Self

where T: Into<Duration>,

Sets or clears the value of min_backoff.

pub fn set_max_backoff<T>(self, v: T) -> Self

where T: Into<Duration>,

Sets the value of max_backoff.

pub fn set_or_clear_max_backoff<T>(self, v: Option<T>) -> Self

where T: Into<Duration>,

Sets or clears the value of max_backoff.

pub fn set_max_doublings<T: Into<i32>>(self, v: T) -> Self

Sets the value of max_doublings.

Trait Implementations

impl Clone for RetryConfig

fn clone(&self) -> RetryConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RetryConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RetryConfig

fn default() -> RetryConfig

Returns the “default value” for a type.

impl Message for RetryConfig

fn typename() -> &'static str

The typename of this message.

impl PartialEq for RetryConfig

fn eq(&self, other: &RetryConfig) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for RetryConfig