aws2: update to use RetryStrategy (#608)

The RetryPolicy classes are deprecated. Update to use the
newer RetryStrategy ([docs]).

[docs]: https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/retry-strategy.html

iep-spring-aws2/src/main/java/com/netflix/iep/aws2/AwsClientFactory.java

@@ -23,15 +23,14 @@
 import software.amazon.awssdk.awscore.client.builder.AwsAsyncClientBuilder;
 import software.amazon.awssdk.awscore.client.builder.AwsClientBuilder;
 import software.amazon.awssdk.awscore.client.builder.AwsSyncClientBuilder;
+import software.amazon.awssdk.awscore.retry.AwsRetryStrategy;
 import software.amazon.awssdk.core.client.config.ClientOverrideConfiguration;
 import software.amazon.awssdk.core.client.config.SdkAdvancedClientOption;
-import software.amazon.awssdk.core.retry.RetryPolicy;
-import software.amazon.awssdk.core.retry.backoff.BackoffStrategy;
-import software.amazon.awssdk.core.retry.conditions.RetryCondition;
 import software.amazon.awssdk.http.SdkHttpConfigurationOption;
 import software.amazon.awssdk.http.SdkHttpService;
 import software.amazon.awssdk.http.async.SdkAsyncHttpService;
 import software.amazon.awssdk.regions.Region;
+import software.amazon.awssdk.retries.api.RetryStrategy;
 import software.amazon.awssdk.services.sts.StsClient;
 import software.amazon.awssdk.services.sts.auth.StsAssumeRoleCredentialsProvider;
 import software.amazon.awssdk.services.sts.model.AssumeRoleRequest;
@@ -94,13 +93,11 @@ private void setIfPresent(
 
   private void setRetriesIfPresent(Config cfg, ClientOverrideConfiguration.Builder builder) {
     if (cfg.hasPath("retry-policy.num-retries")) {
-      RetryPolicy retryPolicy = RetryPolicy.builder()
-              .backoffStrategy(BackoffStrategy.defaultStrategy())
-              .throttlingBackoffStrategy(BackoffStrategy.defaultThrottlingStrategy())
-              .numRetries(cfg.getInt("retry-policy.num-retries"))
-              .retryCondition(RetryCondition.defaultRetryCondition())
-              .build();
-      builder.retryPolicy(retryPolicy);
+      RetryStrategy retryStrategy = AwsRetryStrategy.defaultRetryStrategy()
+          .toBuilder()
+          .maxAttempts(cfg.getInt("retry-policy.num-retries") + 1)
+          .build();
+      builder.retryStrategy(retryStrategy);
     }
   }
 

iep-spring-aws2/src/test/java/com/netflix/iep/aws2/AwsClientFactoryTest.java

@@ -287,7 +287,7 @@ public void settingsTimeout() {
     ClientOverrideConfiguration settings = factory.createClientConfig(cfg);
     Assert.assertEquals(Duration.ofMillis(42000), settings.apiCallAttemptTimeout().get());
     Assert.assertEquals(Duration.ofMillis(13000), settings.apiCallTimeout().get());
-    Assert.assertEquals(Integer.valueOf(5), settings.retryPolicy().get().numRetries());
+    Assert.assertEquals(6, settings.retryStrategy().get().maxAttempts());
   }
 
   @Test