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Class: AWS.AppConfigData

Inherits:
AWS.Service show all
Identifier:
appconfigdata
API Version:
2021-11-11
Defined in:
(unknown)

Overview

Constructs a service interface object. Each API operation is exposed as a function on service.

Service Description

AppConfig Data provides the data plane APIs your application uses to retrieve configuration data. Here's how it works:

Your application retrieves configuration data by first establishing a configuration session using the AppConfig Data StartConfigurationSession API action. Your session's client then makes periodic calls to GetLatestConfiguration to check for and retrieve the latest data available.

When calling StartConfigurationSession, your code sends the following information:

  • Identifiers (ID or name) of an AppConfig application, environment, and configuration profile that the session tracks.

  • (Optional) The minimum amount of time the session's client must wait between calls to GetLatestConfiguration.

In response, AppConfig provides an InitialConfigurationToken to be given to the session's client and used the first time it calls GetLatestConfiguration for that session.

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.

When calling GetLatestConfiguration, your client code sends the most recent ConfigurationToken value it has and receives in response:

  • NextPollConfigurationToken: the ConfigurationToken value to use on the next call to GetLatestConfiguration.

  • NextPollIntervalInSeconds: the duration the client should wait before making its next call to GetLatestConfiguration. This duration may vary over the course of the session, so it should be used instead of the value sent on the StartConfigurationSession call.

  • The configuration: the latest data intended for the session. This may be empty if the client already has the latest version of the configuration.

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.

For more information and to view example CLI commands that show how to retrieve a configuration using the AppConfig Data StartConfigurationSession and GetLatestConfiguration API actions, see Retrieving the configuration in the AppConfig User Guide.

Sending a Request Using AppConfigData

var appconfigdata = new AWS.AppConfigData();
appconfigdata.getLatestConfiguration(params, function (err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Locking the API Version

In order to ensure that the AppConfigData object uses this specific API, you can construct the object by passing the apiVersion option to the constructor:

var appconfigdata = new AWS.AppConfigData({apiVersion: '2021-11-11'});

You can also set the API version globally in AWS.config.apiVersions using the appconfigdata service identifier:

AWS.config.apiVersions = {
  appconfigdata: '2021-11-11',
  // other service API versions
};

var appconfigdata = new AWS.AppConfigData();

Version:

  • 2021-11-11

Constructor Summary collapse

Property Summary collapse

Properties inherited from AWS.Service

apiVersions

Method Summary collapse

Methods inherited from AWS.Service

makeRequest, makeUnauthenticatedRequest, waitFor, setupRequestListeners, defineService

Constructor Details

new AWS.AppConfigData(options = {}) ⇒ Object

Constructs a service object. This object has one method for each API operation.

Examples:

Constructing a AppConfigData object

var appconfigdata = new AWS.AppConfigData({apiVersion: '2021-11-11'});

Options Hash (options):

  • params (map) —

    An optional map of parameters to bind to every request sent by this service object. For more information on bound parameters, see "Working with Services" in the Getting Started Guide.

  • endpoint (String|AWS.Endpoint) —

    The endpoint URI to send requests to. The default endpoint is built from the configured region. The endpoint should be a string like 'https://{service}.{region}.amazonaws.com' or an Endpoint object.

  • accessKeyId (String) —

    your AWS access key ID.

  • secretAccessKey (String) —

    your AWS secret access key.

  • sessionToken (AWS.Credentials) —

    the optional AWS session token to sign requests with.

  • credentials (AWS.Credentials) —

    the AWS credentials to sign requests with. You can either specify this object, or specify the accessKeyId and secretAccessKey options directly.

  • credentialProvider (AWS.CredentialProviderChain) —

    the provider chain used to resolve credentials if no static credentials property is set.

  • region (String) —

    the region to send service requests to. See AWS.AppConfigData.region for more information.

  • maxRetries (Integer) —

    the maximum amount of retries to attempt with a request. See AWS.AppConfigData.maxRetries for more information.

  • maxRedirects (Integer) —

    the maximum amount of redirects to follow with a request. See AWS.AppConfigData.maxRedirects for more information.

  • sslEnabled (Boolean) —

    whether to enable SSL for requests.

  • paramValidation (Boolean|map) —

    whether input parameters should be validated against the operation description before sending the request. Defaults to true. Pass a map to enable any of the following specific validation features:

    • min [Boolean] — Validates that a value meets the min constraint. This is enabled by default when paramValidation is set to true.
    • max [Boolean] — Validates that a value meets the max constraint.
    • pattern [Boolean] — Validates that a string value matches a regular expression.
    • enum [Boolean] — Validates that a string value matches one of the allowable enum values.
  • computeChecksums (Boolean) —

    whether to compute checksums for payload bodies when the service accepts it (currently supported in S3 only)

  • convertResponseTypes (Boolean) —

    whether types are converted when parsing response data. Currently only supported for JSON based services. Turning this off may improve performance on large response payloads. Defaults to true.

  • correctClockSkew (Boolean) —

    whether to apply a clock skew correction and retry requests that fail because of an skewed client clock. Defaults to false.

  • s3ForcePathStyle (Boolean) —

    whether to force path style URLs for S3 objects.

  • s3BucketEndpoint (Boolean) —

    whether the provided endpoint addresses an individual bucket (false if it addresses the root API endpoint). Note that setting this configuration option requires an endpoint to be provided explicitly to the service constructor.

  • s3DisableBodySigning (Boolean) —

    whether S3 body signing should be disabled when using signature version v4. Body signing can only be disabled when using https. Defaults to true.

  • s3UsEast1RegionalEndpoint ('legacy'|'regional') —

    when region is set to 'us-east-1', whether to send s3 request to global endpoints or 'us-east-1' regional endpoints. This config is only applicable to S3 client. Defaults to legacy

  • s3UseArnRegion (Boolean) —

    whether to override the request region with the region inferred from requested resource's ARN. Only available for S3 buckets Defaults to true

  • retryDelayOptions (map) —

    A set of options to configure the retry delay on retryable errors. Currently supported options are:

    • base [Integer] — The base number of milliseconds to use in the exponential backoff for operation retries. Defaults to 100 ms for all services except DynamoDB, where it defaults to 50ms.
    • customBackoff [function] — A custom function that accepts a retry count and error and returns the amount of time to delay in milliseconds. If the result is a non-zero negative value, no further retry attempts will be made. The base option will be ignored if this option is supplied. The function is only called for retryable errors.
  • httpOptions (map) —

    A set of options to pass to the low-level HTTP request. Currently supported options are:

    • proxy [String] — the URL to proxy requests through
    • agent [http.Agent, https.Agent] — the Agent object to perform HTTP requests with. Used for connection pooling. Defaults to the global agent (http.globalAgent) for non-SSL connections. Note that for SSL connections, a special Agent object is used in order to enable peer certificate verification. This feature is only available in the Node.js environment.
    • connectTimeout [Integer] — Sets the socket to timeout after failing to establish a connection with the server after connectTimeout milliseconds. This timeout has no effect once a socket connection has been established.
    • timeout [Integer] — Sets the socket to timeout after timeout milliseconds of inactivity on the socket. Defaults to two minutes (120000).
    • xhrAsync [Boolean] — Whether the SDK will send asynchronous HTTP requests. Used in the browser environment only. Set to false to send requests synchronously. Defaults to true (async on).
    • xhrWithCredentials [Boolean] — Sets the "withCredentials" property of an XMLHttpRequest object. Used in the browser environment only. Defaults to false.
  • apiVersion (String, Date) —

    a String in YYYY-MM-DD format (or a date) that represents the latest possible API version that can be used in all services (unless overridden by apiVersions). Specify 'latest' to use the latest possible version.

  • apiVersions (map<String, String|Date>) —

    a map of service identifiers (the lowercase service class name) with the API version to use when instantiating a service. Specify 'latest' for each individual that can use the latest available version.

  • logger (#write, #log) —

    an object that responds to .write() (like a stream) or .log() (like the console object) in order to log information about requests

  • systemClockOffset (Number) —

    an offset value in milliseconds to apply to all signing times. Use this to compensate for clock skew when your system may be out of sync with the service time. Note that this configuration option can only be applied to the global AWS.config object and cannot be overridden in service-specific configuration. Defaults to 0 milliseconds.

  • signatureVersion (String) —

    the signature version to sign requests with (overriding the API configuration). Possible values are: 'v2', 'v3', 'v4'.

  • signatureCache (Boolean) —

    whether the signature to sign requests with (overriding the API configuration) is cached. Only applies to the signature version 'v4'. Defaults to true.

  • dynamoDbCrc32 (Boolean) —

    whether to validate the CRC32 checksum of HTTP response bodies returned by DynamoDB. Default: true.

  • useAccelerateEndpoint (Boolean) —

    Whether to use the S3 Transfer Acceleration endpoint with the S3 service. Default: false.

  • clientSideMonitoring (Boolean) —

    whether to collect and publish this client's performance metrics of all its API requests.

  • endpointDiscoveryEnabled (Boolean|undefined) —

    whether to call operations with endpoints given by service dynamically. Setting this

  • endpointCacheSize (Number) —

    the size of the global cache storing endpoints from endpoint discovery operations. Once endpoint cache is created, updating this setting cannot change existing cache size. Defaults to 1000

  • hostPrefixEnabled (Boolean) —

    whether to marshal request parameters to the prefix of hostname. Defaults to true.

  • stsRegionalEndpoints ('legacy'|'regional') —

    whether to send sts request to global endpoints or regional endpoints. Defaults to 'legacy'.

  • useFipsEndpoint (Boolean) —

    Enables FIPS compatible endpoints. Defaults to false.

  • useDualstackEndpoint (Boolean) —

    Enables IPv6 dualstack endpoint. Defaults to false.

Property Details

endpoint ⇒ AWS.Endpoint (readwrite)

Returns an Endpoint object representing the endpoint URL for service requests.

Returns:

  • (AWS.Endpoint) —

    an Endpoint object representing the endpoint URL for service requests.

Method Details

getLatestConfiguration(params = {}, callback) ⇒ AWS.Request

Retrieves the latest deployed configuration. This API may return empty configuration data if the client already has the latest version. For more information about this API action and to view example CLI commands that show how to use it with the StartConfigurationSession API action, see Retrieving the configuration in the AppConfig User Guide.

Note the following important information.

  • Each configuration token is only valid for one call to GetLatestConfiguration. The GetLatestConfiguration response includes a NextPollConfigurationToken that should always replace the token used for the just-completed call in preparation for the next one.

  • GetLatestConfiguration is a priced call. For more information, see Pricing.

Service Reference:

Examples:

Calling the getLatestConfiguration operation

var params = {
  ConfigurationToken: 'STRING_VALUE' /* required */
};
appconfigdata.getLatestConfiguration(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {}) —
    • ConfigurationToken — (String)

      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.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response) —

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error) —

      the error object returned from the request. Set to null if the request is successful.

    • data (Object) —

      the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

      • NextPollConfigurationToken — (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.

      • NextPollIntervalInSeconds — (Integer)

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

      • ContentType — (String)

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

      • Configuration — (Buffer(Node.js), Typed Array(Browser))

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

      • VersionLabel — (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.

Returns:

  • (AWS.Request) —

    a handle to the operation request for subsequent event callback registration.

startConfigurationSession(params = {}, callback) ⇒ AWS.Request

Starts a configuration session used to retrieve a deployed configuration. For more information about this API action and to view example CLI commands that show how to use it with the GetLatestConfiguration API action, see Retrieving the configuration in the AppConfig User Guide.

Service Reference:

Examples:

Calling the startConfigurationSession operation

var params = {
  ApplicationIdentifier: 'STRING_VALUE', /* required */
  ConfigurationProfileIdentifier: 'STRING_VALUE', /* required */
  EnvironmentIdentifier: 'STRING_VALUE', /* required */
  RequiredMinimumPollIntervalInSeconds: 'NUMBER_VALUE'
};
appconfigdata.startConfigurationSession(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {}) —
    • ApplicationIdentifier — (String)

      The application ID or the application name.

    • EnvironmentIdentifier — (String)

      The environment ID or the environment name.

    • ConfigurationProfileIdentifier — (String)

      The configuration profile ID or the configuration profile name.

    • RequiredMinimumPollIntervalInSeconds — (Integer)

      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.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response) —

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error) —

      the error object returned from the request. Set to null if the request is successful.

    • data (Object) —

      the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

      • InitialConfigurationToken — (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.

Returns:

  • (AWS.Request) —

    a handle to the operation request for subsequent event callback registration.