AWS AppConfig Data

/apis-guru/aws-appconfig-data

<p>AppConfig Data provides the data plane APIs your application uses to retrieve configuration data. Here's how it works:</p> <p>Your application retrieves configuration data by first establishing a configuration session using the AppConfig Data <a>StartConfigurationSession</a> API action. Your session's client then makes periodic calls to <a>GetLatestConfiguration</a> to check for and retrieve the latest data available.</p> <p>When calling <code>StartConfigurationSession</code>, your code sends the following information:</p> <ul> <li> <p>Identifiers (ID or name) of an AppConfig application, environment, and configuration profile that the session tracks.</p> </li> <li> <p>(Optional) The minimum amount of time the session's client must wait between calls to <code>GetLatestConfiguration</code>.</p> </li> </ul> <p>In response, AppConfig provides an <code>InitialConfigurationToken</code> to be given to the session's client and used the first time it calls <code>GetLatestConfiguration</code> for that session.</p> <important> <p>This token should only be used once in your first call to <code>GetLatestConfiguration</code>. You <i>must</i> use the new token in the <code>GetLatestConfiguration</code> response (<code>NextPollConfigurationToken</code>) in each subsequent call to <code>GetLatestConfiguration</code>.</p> </important> <p>When calling <code>GetLatestConfiguration</code>, your client code sends the most recent <code>ConfigurationToken</code> value it has and receives in response:</p> <ul> <li> <p> <code>NextPollConfigurationToken</code>: the <code>ConfigurationToken</code> value to use on the next call to <code>GetLatestConfiguration</code>.</p> </li> <li> <p> <code>NextPollIntervalInSeconds</code>: the duration the client should wait before making its next call to <code>GetLatestConfiguration</code>. This duration may vary over the course of the session, so it should be used instead of the value sent on the <code>StartConfigurationSession</code> call.</p> </li> <li> <p>The configuration: the latest data intended for the session. This may be empty if the client already has the latest version of the configuration.</p> </li> </ul> <important> <p>The <code>InitialConfigurationToken</code> and <code>NextPollConfigurationToken</code> should only be used once. To support long poll use cases, the tokens are valid for up to 24 hours. If a <code>GetLatestConfiguration</code> call uses an expired token, the system returns <code>BadRequestException</code>.</p> </important> <p>For more information and to view example CLI commands that show how to retrieve a configuration using the AppConfig Data <code>StartConfigurationSession</code> and <code>GetLatestConfiguration</code> API actions, see <a href="http://docs.aws.amazon.com/appconfig/latest/userguide/appconfig-retrieving-the-configuration">Retrieving the configuration</a> in the <i>AppConfig User Guide</i>.</p>