Struct Client

pub struct Client { /* private fields */ }

Client for AWS AppConfig Data

Client for invoking operations on AWS AppConfig Data. Each operation on AWS AppConfig Data is a method on this this struct. .send() MUST be invoked on the generated operations to dispatch the request to the service.

Constructing a Client

A Config is required to construct a client. For most use cases, the aws-config crate should be used to automatically resolve this config using aws_config::load_from_env(), since this will resolve an SdkConfig which can be shared across multiple different AWS SDK clients. This config resolution process can be customized by calling aws_config::from_env() instead, which returns a ConfigLoader that uses the builder pattern to customize the default config.

In the simplest case, creating a client looks as follows:

let config = aws_config::load_from_env().await;
let client = aws_sdk_appconfigdata::Client::new(&config);

Occasionally, SDKs may have additional service-specific values that can be set on the Config that is absent from SdkConfig, or slightly different settings for a specific client may be desired. The Builder struct implements From<&SdkConfig>, so setting these specific settings can be done as follows:

let sdk_config = ::aws_config::load_from_env().await;
let config = aws_sdk_appconfigdata::config::Builder::from(&sdk_config)
    .some_service_specific_setting("value")
    .build();

See the aws-config docs and Config for more information on customizing configuration.

Note: Client construction is expensive due to connection thread pool initialization, and should be done once at application start-up.

Using the Client

A client has a function for every operation that can be performed by the service. For example, the GetLatestConfiguration operation has a Client::get_latest_configuration, function which returns a builder for that operation. The fluent builder ultimately has a send() function that returns an async future that returns a result, as illustrated below:

let result = client.get_latest_configuration()
    .configuration_token("example")
    .send()
    .await;

The underlying HTTP requests that get made by this can be modified with the customize_operation function on the fluent builder. See the customize module for more information.

Implementations

impl Client

pub fn get_latest_configuration(&self) -> GetLatestConfigurationFluentBuilder

Constructs a fluent builder for the GetLatestConfiguration operation.

• The fluent builder is configurable:
  • configuration_token(impl Into<String>) / set_configuration_token(Option<String>):
    required: true
    

    Token describing the current state of the configuration session. To obtain a token, first call the StartConfigurationSession API. Note that every call to GetLatestConfiguration will return a new ConfigurationToken (NextPollConfigurationToken in the response) and must be provided to subsequent GetLatestConfiguration API calls.

    This token should only be used once. To support long poll use cases, the token is valid for up to 24 hours. If a GetLatestConfiguration call uses an expired token, the system returns BadRequestException.

    
    
• On success, responds with GetLatestConfigurationOutput with field(s):
  • next_poll_configuration_token(Option<String>):

    The latest token describing the current state of the configuration session. This must be provided to the next call to GetLatestConfiguration.

    This token should only be used once. To support long poll use cases, the token is valid for up to 24 hours. If a GetLatestConfiguration call uses an expired token, the system returns BadRequestException.

  • next_poll_interval_in_seconds(i32):

    The amount of time the client should wait before polling for configuration updates again. Use RequiredMinimumPollIntervalInSeconds to set the desired poll interval.

  • content_type(Option<String>):

    A standard MIME type describing the format of the configuration content.

  • configuration(Option<Blob>):

    The data of the configuration. This may be empty if the client already has the latest version of configuration.

  • version_label(Option<String>):

    The user-defined label for the AppConfig hosted configuration version. This attribute doesn’t apply if the configuration is not from an AppConfig hosted configuration version. If the client already has the latest version of the configuration data, this value is empty.

• On failure, responds with SdkError<GetLatestConfigurationError>

impl Client

pub fn start_configuration_session( &self, ) -> StartConfigurationSessionFluentBuilder

Constructs a fluent builder for the StartConfigurationSession operation.

• The fluent builder is configurable:
  • application_identifier(impl Into<String>) / set_application_identifier(Option<String>):
    required: true
    

    The application ID or the application name.

    
    
  • environment_identifier(impl Into<String>) / set_environment_identifier(Option<String>):
    required: true
    

    The environment ID or the environment name.

    
    
  • configuration_profile_identifier(impl Into<String>) / set_configuration_profile_identifier(Option<String>):
    required: true
    

    The configuration profile ID or the configuration profile name.

    
    
  • required_minimum_poll_interval_in_seconds(i32) / set_required_minimum_poll_interval_in_seconds(Option<i32>):
    required: false
    

    Sets a constraint on a session. If you specify a value of, for example, 60 seconds, then the client that established the session can’t call GetLatestConfiguration more frequently than every 60 seconds.

    
    
• On success, responds with StartConfigurationSessionOutput with field(s):
  • initial_configuration_token(Option<String>):

    Token encapsulating state about the configuration session. Provide this token to the GetLatestConfiguration API to retrieve configuration data.

    This token should only be used once in your first call to GetLatestConfiguration. You must use the new token in the GetLatestConfiguration response (NextPollConfigurationToken) in each subsequent call to GetLatestConfiguration.

    The InitialConfigurationToken and NextPollConfigurationToken should only be used once. To support long poll use cases, the tokens are valid for up to 24 hours. If a GetLatestConfiguration call uses an expired token, the system returns BadRequestException.

• On failure, responds with SdkError<StartConfigurationSessionError>

impl Client

pub fn from_conf(conf: Config) -> Self

Creates a new client from the service Config.

Panics

This method will panic in the following cases:

• Retries or timeouts are enabled without a sleep_impl configured.
• Identity caching is enabled without a sleep_impl and time_source configured.
• No behavior_version is provided.

The panic message for each of these will have instructions on how to resolve them.

pub fn config(&self) -> &Config

Returns the client’s configuration.

impl Client

pub fn new(sdk_config: &SdkConfig) -> Self

Creates a new client from an SDK Config.

Panics

• This method will panic if the sdk_config is missing an async sleep implementation. If you experience this panic, set the sleep_impl on the Config passed into this function to fix it.
• This method will panic if the sdk_config is missing an HTTP connector. If you experience this panic, set the http_connector on the Config passed into this function to fix it.
• This method will panic if no BehaviorVersion is provided. If you experience this panic, set behavior_version on the Config or enable the behavior-version-latest Cargo feature.

Trait Implementations

impl Clone for Client

fn clone(&self) -> Client

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Client

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

Formats the value using the given formatter.