Enum nakadion::consumer::DispatchStrategy

#[non_exhaustive]
pub enum DispatchStrategy {
    AllSequential,
}

Defines how to dispatch batches to handlers.

FromStr

use nakadion::consumer::DispatchStrategy;

let strategy = "all_sequential".parse::<DispatchStrategy>().unwrap();
assert_eq!(strategy, DispatchStrategy::AllSequential);

JSON is also valid:

use nakadion::consumer::DispatchStrategy;

let strategy = "{\"strategy\": \"all_sequential\"}".parse::<DispatchStrategy>().unwrap();
assert_eq!(strategy, DispatchStrategy::AllSequential);

Environment variables

Fetching values from the environment uses FromStr for parsing.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

AllSequential

Dispatch all batches to a single worker(handler)

This means batches are processed sequentially.

Methods

impl DispatchStrategy

pub fn try_from_env() -> Result<Option<Self>, Error>

Initialize from the environment.

Returns None if the value was not found and fails if the value could not be parsed.

The name of the environment variable is "NAKADION_ DISPATCH_STRATEGY "

pub fn try_from_env_prefixed<T: Into<String>>(
    prefix: T
) -> Result<Option<Self>, Error>

Initialize from the environment.

Returns None if the value was not found and fails if the value could not be parsed.

The name of the environment variable is "prefix_ DISPATCH_STRATEGY "

pub fn try_from_env_named<T: AsRef<str>>(
    var_name: T
) -> Result<Option<Self>, Error>

Initialize from the environment.

Returns None if the value was not found and fails if the value could not be parsed.

The name of the environment variable is var_name.

pub fn from_env() -> Result<Self, Error>

Initialize from the environment.

Fails if the value was not found or if the value could not be parsed.

The name of the environment variable is "NAKADION_ DISPATCH_STRATEGY "

pub fn from_env_prefixed<T: Into<String>>(prefix: T) -> Result<Self, Error>

Initialize from the environment.

Fails if the value was not found or if the value could not be parsed.

The name of the environment variable is "prefix_ DISPATCH_STRATEGY "

pub fn from_env_named<T: AsRef<str>>(var_name: T) -> Result<Self, Error>

Initialize from the environment.

Fails if the value was not found or if the value could not be parsed.

The name of the environment variable is var_name.

pub fn from_env_opt() -> Option<Self>

Initialize from the environment.

Returns None if the value could not be read for any reason.

The name of the environment variable is "NAKADION_ DISPATCH_STRATEGY "

pub fn from_env_opt_prefixed<T: Into<String>>(prefix: T) -> Option<Self>

Initialize from the environment.

Returns None if the value could not be read for any reason.

The name of the environment variable is "prefix_ DISPATCH_STRATEGY "

pub fn from_env_opt_named<T: AsRef<str>>(var_name: T) -> Option<Self>

Initialize from the environment.

Returns None if the value could not be read for any reason.

The name of the environment variable is var_name.

Trait Implementations

impl Clone for DispatchStrategy

fn clone(&self) -> DispatchStrategy

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DispatchStrategy

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

Formats the value using the given formatter.

impl Default for DispatchStrategy

fn default() -> Self

Returns the "default value" for a type.

impl<'de> Deserialize<'de> for DispatchStrategy

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Display for DispatchStrategy

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

Formats the value using the given formatter.

impl Eq for DispatchStrategy

impl FromStr for DispatchStrategy

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl PartialEq<DispatchStrategy> for DispatchStrategy

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Serialize for DispatchStrategy

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl StructuralEq for DispatchStrategy

impl StructuralPartialEq for DispatchStrategy