Change STANDARD mode retry count for DynamoDB to match LEGACY as V1

.changes/next-release/feature-AWSSDKforJavav2-e6a3a04.json

@@ -0,0 +1,6 @@
+{
+    "category": "Amazon DynamoDB",
+    "contributor": "", 
+    "type": "feature", 
+    "description": "Change STANDARD mode retry count which was 2 for DynamoDB to match LEGACY retry count which is 8."
+}

services/dynamodb/src/main/java/software/amazon/awssdk/services/dynamodb/DynamoDbRetryPolicy.java

@@ -26,6 +26,7 @@
 import software.amazon.awssdk.core.retry.backoff.BackoffStrategy;
 import software.amazon.awssdk.core.retry.backoff.FullJitterBackoffStrategy;
 
+
 /**
  * Default retry policy for DynamoDB Client.
  */
@@ -36,6 +37,11 @@ final class DynamoDbRetryPolicy {
      * Default max retry count for DynamoDB client, when using the LEGACY retry mode.
      **/
     private static final int LEGACY_MAX_ERROR_RETRY = 8;
+
+    /**
+     * Default max retry count for DynamoDB client, when using the STANDARD retry mode.
+     **/
+    private static final int STANDARD_MAX_ERROR_RETRY = LEGACY_MAX_ERROR_RETRY;
 
     /**
      * Default base sleep time for DynamoDB, when using the LEGACY retry mode.
@@ -69,18 +75,22 @@ public static RetryPolicy resolveRetryPolicy(SdkClientConfiguration config) {
                                        .profileName(config.option(SdkClientOption.PROFILE_NAME))
                                        .resolve();
 
-        if (retryMode != RetryMode.LEGACY) {
-            return AwsRetryPolicy.forRetryMode(retryMode)
-                                 .toBuilder()
-                                 .additionalRetryConditionsAllowed(false)
-                                 .build();
+        switch (retryMode) {
+            case LEGACY:
+                return AwsRetryPolicy.forRetryMode(RetryMode.LEGACY)
+                        .toBuilder()
+                        .additionalRetryConditionsAllowed(false)
+                        .numRetries(LEGACY_MAX_ERROR_RETRY)
+                        .backoffStrategy(LEGACY_BACKOFF_STRATEGY)
+                        .build();
+            case STANDARD:
+                return AwsRetryPolicy.forRetryMode(retryMode)
+                        .toBuilder()
+                        .additionalRetryConditionsAllowed(false)
+                        .numRetries(STANDARD_MAX_ERROR_RETRY)
+                        .build();
+            default:
+                throw new IllegalArgumentException("Unknown retry mode: " + retryMode);
         }
-
-        return AwsRetryPolicy.forRetryMode(RetryMode.LEGACY)
-                             .toBuilder()
-                             .additionalRetryConditionsAllowed(false)
-                             .numRetries(LEGACY_MAX_ERROR_RETRY)
-                             .backoffStrategy(LEGACY_BACKOFF_STRATEGY)
-                             .build();
     }
 }

services/dynamodb/src/test/java/software/amazon/awssdk/services/dynamodb/DynamoDbRetryPolicyTest.java

@@ -0,0 +1,35 @@
+package software.amazon.awssdk.services.dynamodb;
+
+import org.junit.Test;
+import software.amazon.awssdk.core.SdkSystemSetting;
+import software.amazon.awssdk.core.client.config.SdkClientConfiguration;
+import software.amazon.awssdk.core.retry.RetryPolicy;
+import software.amazon.awssdk.profiles.ProfileFileSystemSetting;
+import software.amazon.awssdk.testutils.EnvironmentVariableHelper;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class DynamoDbRetryPolicyTest {
+
+    private static final EnvironmentVariableHelper ENVIRONMENT_VARIABLE_HELPER = new EnvironmentVariableHelper();
+
+    @Test
+    public void test_numRetries_with_standardRetryPolicy() {
+        ENVIRONMENT_VARIABLE_HELPER.set(SdkSystemSetting.AWS_RETRY_MODE.environmentVariable(), "standard");
+        System.setProperty(ProfileFileSystemSetting.AWS_PROFILE.property(), "default");
+        final SdkClientConfiguration sdkClientConfiguration = SdkClientConfiguration.builder().build();
+        final RetryPolicy retryPolicy = DynamoDbRetryPolicy.resolveRetryPolicy(sdkClientConfiguration);
+        assertThat(retryPolicy.numRetries()).isEqualTo(8);
+    }
+
+    @Test
+    public void test_numRetries_with_legacyRetryPolicy() {
+        ENVIRONMENT_VARIABLE_HELPER.set(SdkSystemSetting.AWS_RETRY_MODE.environmentVariable(), "legacy");
+        System.setProperty(ProfileFileSystemSetting.AWS_PROFILE.property(), "default");
+        final SdkClientConfiguration sdkClientConfiguration = SdkClientConfiguration.builder().build();
+        final RetryPolicy retryPolicy = DynamoDbRetryPolicy.resolveRetryPolicy(sdkClientConfiguration);
+        assertThat(retryPolicy.numRetries()).isEqualTo(8);
+    }
+
+
+}