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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.

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.

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 Receiving the configuration in the AppConfig User Guide .