来自 Spring 引导的 Amazon AppConfig

Question

如何在我的 spring 启动应用程序中从 aws appconfig 访问配置？

由于 appconfig 是一项新服务，是否有我们可以使用的 java sdk，因为我在https://github.com/aws/aws-sdk-java/tree/master/src/samples中还没有看到 appconfig 的任何内容

Answer 1

以下是我如何将 AWS AppConfig 集成到我的 Spring Boot 项目中。

首先，让我们确保我们的 pom.xml 中有这个依赖项：

 <dependency>
      <groupId>com.amazonaws</groupId>
      <artifactId>aws-java-sdk-appconfig</artifactId>
      <version>1.12.134</version>
 </dependency>

接下来，让我们创建一个我们自己的 AWS AppConfig Client 的简单配置类：

@Configuration
public class AwsAppConfiguration {

    private static final Logger LOGGER = LoggerFactory.getLogger(AwsAppConfiguration.class);

    private final AmazonAppConfig appConfig;
    private final GetConfigurationRequest request;

    public AwsAppConfiguration() {
        appConfig = AmazonAppConfigClient.builder().build();
        request = new GetConfigurationRequest();
        request.setClientId("clientId");
        request.setApplication("FeatureProperties");
        request.setConfiguration("JsonProperties");
        request.setEnvironment("dev");
    }

    public JSONObject getConfiguration() throws UnsupportedEncodingException {
        GetConfigurationResult result = appConfig.getConfiguration(request);
        String message = String.format("contentType: %s", result.getContentType());
        LOGGER.info(message);

        if (!Objects.equals("application/json", result.getContentType())) {
            throw new IllegalStateException("config is expected to be JSON");
        }

        String content = new String(result.getContent().array(), "ASCII");
        return new JSONObject(content).getJSONObject("feature");
    }
}

最后，让我们创建一个从 AWS AppConfig 轮询配置的计划任务：

@Configuration
@EnableScheduling
public class AwsAppConfigScheduledTask {

    private static final Logger LOGGER = LoggerFactory.getLogger(AwsAppConfigScheduledTask.class);

    @Autowired
    private FeatureProperties featureProperties;

    @Autowired
    private AwsAppConfiguration appConfiguration;

    @Scheduled(fixedRate = 5000)
    public void pollConfiguration() throws UnsupportedEncodingException {
        LOGGER.info("polls configuration from aws app config");
        JSONObject externalizedConfig = appConfiguration.getConfiguration();
        featureProperties.setEnabled(externalizedConfig.getBoolean("enabled"));
        featureProperties.setLimit(externalizedConfig.getInt("limit"));
    }

}

我遇到了这个问题，因为我还试图弄清楚如何最好地将 AWS AppConfig 集成到 Spring Boot 中。

这是我创建的一篇文章。 你可以在这里访问它： https : //levelup.gitconnected.com/create-features-toggles-using-aws-appconfig-in-spring-boot-7454b122bf91

此外，源代码可在 github 上获得： https : //github.com/emyasa/medium-articles/tree/master/aws-spring-boot/app-config

Answer 2

首先我添加了依赖项

    <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>appconfig</artifactId>
        <version>2.18.41</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/software.amazon.awssdk/appconfigdata -->
    <dependency>
        <groupId>software.amazon.awssdk</groupId>
        <artifactId>appconfigdata</artifactId>
        <version>2.19.4</version>
    </dependency>

然后构建客户端

        client = AppConfigDataClient.builder()
            .credentialsProvider(() -> AwsBasicCredentials.create("<your id>", "your secret key"))
            .region(Region.<your region>)
            .build();

使用客户端启动配置session

        StartConfigurationSessionRequest startConfigurationSessionRequest = StartConfigurationSessionRequest.builder()
            .applicationIdentifier("<your application id>")
            .environmentIdentifier("your environment id")
            .configurationProfileIdentifier("your config id")
            .build(); 

一开始获取 session 令牌并将其用于初始调用。

String sessionToken = client.startConfigurationSession(startConfigurationSessionRequest).initialConfigurationToken();
    
    
    GetLatestConfigurationRequest latestConfigurationRequest = GetLatestConfigurationRequest.builder()
            .configurationToken(sessionToken)
            .build();
    GetLatestConfigurationResponse latestConfigurationResponse = client.getLatestConfiguration(latestConfigurationRequest);
    String response =  latestConfigurationResponse.configuration().asUtf8String();

您可以使用响应中可用的下一个令牌进行下一次调用。 可以根据需要缓存令牌。

Answer 3

2023，使用aws-java-sdk-appconfigdata

<dependency>
    <groupId>com.amazonaws</groupId>
    <artifactId>aws-java-sdk-appconfigdata</artifactId>
    <version>1.12.394</version>
</dependency>

例子：

@Slf4j
@Configuration
@EnableScheduling
public class AWSAppConfig {

    private String token;
    private final AWSAppConfigData client;

    public AWSAppConfig() {
        log.info("init app config");
        var client = AWSAppConfigDataClient.builder().build();
        var request = new StartConfigurationSessionRequest();
        request.setEnvironmentIdentifier("prod");
        request.setApplicationIdentifier("my-app");
        request.setConfigurationProfileIdentifier("my-config");
        request.setRequiredMinimumPollIntervalInSeconds(15);
        var result = client.startConfigurationSession(request);
        this.client = client;
        this.token = result.getInitialConfigurationToken();
    }

    @Scheduled(fixedRate = 20000)
    public void pollConfiguration() {
        var request = new GetLatestConfigurationRequest();
        request.setConfigurationToken(token);
        var result = client.getLatestConfiguration(request);
        this.token = result.getNextPollConfigurationToken();
        var configuration = StandardCharsets.UTF_8.decode(result.getConfiguration()).toString();
        log.info("content type: {}", result.getContentType());
        log.info("configuration: {}", configuration);
    }
}