Java v2: Add hello sos examples to RDS Service

.doc_gen/metadata/aurora_metadata.yaml

@@ -5,6 +5,15 @@ aurora_Hello:
   synopsis: get started using &AUR;.
   category: Hello
   languages:
+    Java:
+      versions:
+        - sdk_version: 2
+          github: javav2/example_code/rds
+          sdkguide:
+          excerpts:
+            - description:
+              snippet_tags:
+                - rds.java2.hello.main
     .NET:
       versions:
         - sdk_version: 3

.doc_gen/metadata/rds_metadata.yaml

@@ -5,6 +5,15 @@ rds_Hello:
   synopsis: get started using &RDS;.
   category: Hello
   languages:
+    Java:
+      versions:
+        - sdk_version: 2
+          github: javav2/example_code/rds
+          sdkguide:
+          excerpts:
+            - description:
+              snippet_tags:
+                - rds.java2.describe_instances.main
     .NET:
       versions:
         - sdk_version: 3

javav2/example_code/rds/src/main/java/com/example/rds/DescribeDBInstances.java

@@ -8,8 +8,8 @@
 
 package com.example.rds;
 
+// snippet-start:[rds.java2.describe_instances.main]
 // snippet-start:[rds.java2.describe_instances.import]
-import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
 import software.amazon.awssdk.regions.Region;
 import software.amazon.awssdk.services.rds.RdsClient;
 import software.amazon.awssdk.services.rds.model.DescribeDbInstancesResponse;
@@ -28,20 +28,16 @@
 public class DescribeDBInstances {
 
     public static void main(String[] args) {
-
         Region region = Region.US_EAST_1;
         RdsClient rdsClient = RdsClient.builder()
             .region(region)
-            .credentialsProvider(ProfileCredentialsProvider.create())
             .build();
 
         describeInstances(rdsClient) ;
         rdsClient.close();
     }
 
-    // snippet-start:[rds.java2.describe_instances.main]
     public static void describeInstances(RdsClient rdsClient) {
-
         try {
             DescribeDbInstancesResponse response = rdsClient.describeDBInstances();
             List<DBInstance> instanceList = response.dbInstances();

javav2/example_code/rds/src/main/java/com/example/rds/DescribeDbClusters.java

@@ -0,0 +1,35 @@
+//snippet-sourcedescription:[DescribeDbClusters.java describes existing Amazon Aurora DB clusters.]
+//snippet-keyword:[AWS SDK for Java v2]
+//snippet-service:[Amazon Relational Database Service]
+
+/*
+   Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+   SPDX-License-Identifier: Apache-2.0
+*/
+
+package com.example.rds;
+
+// snippet-start:[rds.java2.hello.main]
+import software.amazon.awssdk.regions.Region;
+import software.amazon.awssdk.services.rds.RdsClient;
+import software.amazon.awssdk.services.rds.paginators.DescribeDBClustersIterable;
+
+public class DescribeDbClusters {
+    public static void main(String[] args) {
+        Region region = Region.US_EAST_1;
+        RdsClient rdsClient = RdsClient.builder()
+            .region(region)
+            .build();
+
+        describeClusters(rdsClient);
+        rdsClient.close();
+    }
+
+    public static void describeClusters( RdsClient rdsClient) {
+        DescribeDBClustersIterable clustersIterable =  rdsClient.describeDBClustersPaginator();
+        clustersIterable.stream()
+            .flatMap(r -> r.dbClusters().stream())
+            .forEach(cluster -> System.out.println("Database name: " + cluster.databaseName() + " Arn = " + cluster.dbClusterArn()));
+    }
+}
+// snippet-end:[rds.java2.hello.main]