# Code examples for Application Recovery Controller using AWS SDKs
<a name="service_code_examples"></a>

The following code examples show how to use Application Recovery Controller with an AWS software development kit (SDK). 

*Actions* are code excerpts from larger programs and must be run in context. While actions show you how to call individual service functions, you can see actions in context in their related scenarios.

For a complete list of AWS SDK developer guides and code examples, see [Using this service with an AWS SDK](sdk-general-information-section.md). This topic also includes information about getting started and details about previous SDK versions.

**Contents**
+ [Basics](service_code_examples_basics.md)
  + [Actions](service_code_examples_actions.md)
    + [`GetRoutingControlState`](example_route53-recovery-cluster_GetRoutingControlState_section.md)
    + [`UpdateRoutingControlState`](example_route53-recovery-cluster_UpdateRoutingControlState_section.md)

# Basic examples for Application Recovery Controller using AWS SDKs
<a name="service_code_examples_basics"></a>

The following code examples show how to use the basics of Amazon Route 53 Application Recovery Controller with AWS SDKs. 

**Contents**
+ [Actions](service_code_examples_actions.md)
  + [`GetRoutingControlState`](example_route53-recovery-cluster_GetRoutingControlState_section.md)
  + [`UpdateRoutingControlState`](example_route53-recovery-cluster_UpdateRoutingControlState_section.md)

# Actions for Application Recovery Controller using AWS SDKs
<a name="service_code_examples_actions"></a>

The following code examples demonstrate how to perform individual Application Recovery Controller actions with AWS SDKs. Each example includes a link to GitHub, where you can find instructions for setting up and running the code. 

 The following examples include only the most commonly used actions. For a complete list, see the [Amazon Route 53 Application Recovery Controller API Reference](https://docs.aws.amazon.com/routing-control/latest/APIReference/Welcome.html). 

**Topics**
+ [`GetRoutingControlState`](example_route53-recovery-cluster_GetRoutingControlState_section.md)
+ [`UpdateRoutingControlState`](example_route53-recovery-cluster_UpdateRoutingControlState_section.md)

# Use `GetRoutingControlState` with an AWS SDK
<a name="example_route53-recovery-cluster_GetRoutingControlState_section"></a>

The following code examples show how to use `GetRoutingControlState`.

------
#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/route53recoverycluster#code-examples). 

```
    public static GetRoutingControlStateResponse getRoutingControlState(List<ClusterEndpoint> clusterEndpoints,
            String routingControlArn) {
        // As a best practice, we recommend choosing a random cluster endpoint to get or
        // set routing control states.
        // For more information, see
        // https://docs.aws.amazon.com/r53recovery/latest/dg/route53-arc-best-practices.html#route53-arc-best-practices.regional
        Collections.shuffle(clusterEndpoints);
        for (ClusterEndpoint clusterEndpoint : clusterEndpoints) {
            try {
                System.out.println(clusterEndpoint);
                Route53RecoveryClusterClient client = Route53RecoveryClusterClient.builder()
                        .endpointOverride(URI.create(clusterEndpoint.endpoint()))
                        .region(Region.of(clusterEndpoint.region())).build();
                return client.getRoutingControlState(
                        GetRoutingControlStateRequest.builder()
                                .routingControlArn(routingControlArn).build());
            } catch (Exception exception) {
                System.out.println(exception);
            }
        }
        return null;
    }
```
+  For API details, see [GetRoutingControlState](https://docs.aws.amazon.com/goto/SdkForJavaV2/route53-recovery-cluster-2019-12-02/GetRoutingControlState) in *AWS SDK for Java 2.x API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/route53-recovery-cluster#code-examples). 

```
import boto3


def create_recovery_client(cluster_endpoint):
    """
    Creates a Boto3 Route 53 Application Recovery Controller client for the specified
    cluster endpoint URL and AWS Region.

    :param cluster_endpoint: The cluster endpoint URL and Region.
    :return: The Boto3 client.
    """
    return boto3.client(
        "route53-recovery-cluster",
        endpoint_url=cluster_endpoint["Endpoint"],
        region_name=cluster_endpoint["Region"],
    )



def get_routing_control_state(routing_control_arn, cluster_endpoints):
    """
    Gets the state of a routing control. Cluster endpoints are tried in
    sequence until the first successful response is received.

    :param routing_control_arn: The ARN of the routing control to look up.
    :param cluster_endpoints: The list of cluster endpoints to query.
    :return: The routing control state response.
    """

    # As a best practice, we recommend choosing a random cluster endpoint to get or set routing control states.
    # For more information, see https://docs.aws.amazon.com/r53recovery/latest/dg/route53-arc-best-practices.html#route53-arc-best-practices.regional
    random.shuffle(cluster_endpoints)
    for cluster_endpoint in cluster_endpoints:
        try:
            recovery_client = create_recovery_client(cluster_endpoint)
            response = recovery_client.get_routing_control_state(
                RoutingControlArn=routing_control_arn
            )
            return response
        except Exception as error:
            print(error)
            raise error
```
+  For API details, see [GetRoutingControlState](https://docs.aws.amazon.com/goto/boto3/route53-recovery-cluster-2019-12-02/GetRoutingControlState) in *AWS SDK for Python (Boto3) API Reference*. 

------
#### [ SAP ABAP ]

**SDK for SAP ABAP**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/r5v#code-examples). 

```
    CONSTANTS cv_pfl TYPE /aws1/rt_profile_id VALUE 'ZCODE_DEMO'.
    DATA lo_exception TYPE REF TO /aws1/cx_rt_generic.
    DATA lo_session TYPE REF TO /aws1/cl_rt_session_base.
    DATA lo_client TYPE REF TO /aws1/if_r5v.
    DATA lt_endpoints TYPE TABLE OF string.
    DATA lv_endpoint TYPE string.
    DATA lv_region TYPE /aws1/rt_region_id.

    " Parse the comma-separated cluster endpoints
    " Expected format: "https://endpoint1.com|us-west-2,https://endpoint2.com|us-east-1"
    SPLIT iv_cluster_endpoints AT ',' INTO TABLE lt_endpoints.

    " As a best practice, shuffle cluster endpoints to distribute load
    " For more information, see https://docs.aws.amazon.com/r53recovery/latest/dg/route53-arc-best-practices.html#route53-arc-best-practices.regional
    " For simplicity, we'll try them in order (shuffling can be added if needed)

    " Try each endpoint in order
    LOOP AT lt_endpoints INTO lv_endpoint.
      TRY.
          " Parse endpoint and region from the format "url|region"
          DATA(lv_pos) = find( val = lv_endpoint sub = '|' ).
          IF lv_pos > 0.
            DATA(lv_url) = substring( val = lv_endpoint len = lv_pos ).
            lv_region = substring( val = lv_endpoint off = lv_pos + 1 ).
          ELSE.
            " If no region specified, use default
            lv_url = lv_endpoint.
            lv_region = 'us-east-1'.
          ENDIF.

          " Create session for this region
          lo_session = /aws1/cl_rt_session_aws=>create( cv_pfl ).

          " Create client with the specific endpoint
          lo_client = create_recovery_client(
            iv_endpoint = lv_url
            iv_region   = lv_region
            io_session  = lo_session ).

          " Try to get the routing control state
          oo_result = lo_client->getroutingcontrolstate(
            iv_routingcontrolarn = iv_routing_control_arn ).

          " If successful, return the result
          RETURN.

        CATCH /aws1/cx_r5vendpttmpyunavailex INTO DATA(lo_endpoint_ex).
          " This endpoint is temporarily unavailable, try the next one
          lo_exception = lo_endpoint_ex.
          CONTINUE.

        CATCH /aws1/cx_r5vaccessdeniedex
              /aws1/cx_r5vinternalserverex
              /aws1/cx_r5vresourcenotfoundex
              /aws1/cx_r5vthrottlingex
              /aws1/cx_r5vvalidationex
              /aws1/cx_rt_generic INTO lo_exception.
          " For other errors, re-raise immediately
          RAISE EXCEPTION lo_exception.
      ENDTRY.
    ENDLOOP.

    " If we get here, all endpoints failed - re-raise the last exception
    IF lo_exception IS BOUND.
      RAISE EXCEPTION lo_exception.
    ENDIF.
```
+  For API details, see [GetRoutingControlState](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html) in *AWS SDK for SAP ABAP API reference*. 

------

For a complete list of AWS SDK developer guides and code examples, see [Using this service with an AWS SDK](sdk-general-information-section.md). This topic also includes information about getting started and details about previous SDK versions.

# Use `UpdateRoutingControlState` with an AWS SDK
<a name="example_route53-recovery-cluster_UpdateRoutingControlState_section"></a>

The following code examples show how to use `UpdateRoutingControlState`.

------
#### [ Java ]

**SDK for Java 2.x**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javav2/example_code/route53recoverycluster#code-examples). 

```
    public static UpdateRoutingControlStateResponse updateRoutingControlState(List<ClusterEndpoint> clusterEndpoints,
            String routingControlArn,
            String routingControlState) {
        // As a best practice, we recommend choosing a random cluster endpoint to get or
        // set routing control states.
        // For more information, see
        // https://docs.aws.amazon.com/r53recovery/latest/dg/route53-arc-best-practices.html#route53-arc-best-practices.regional
        Collections.shuffle(clusterEndpoints);
        for (ClusterEndpoint clusterEndpoint : clusterEndpoints) {
            try {
                System.out.println(clusterEndpoint);
                Route53RecoveryClusterClient client = Route53RecoveryClusterClient.builder()
                        .endpointOverride(URI.create(clusterEndpoint.endpoint()))
                        .region(Region.of(clusterEndpoint.region()))
                        .build();
                return client.updateRoutingControlState(
                        UpdateRoutingControlStateRequest.builder()
                                .routingControlArn(routingControlArn).routingControlState(routingControlState).build());
            } catch (Exception exception) {
                System.out.println(exception);
            }
        }
        return null;
    }
```
+  For API details, see [UpdateRoutingControlState](https://docs.aws.amazon.com/goto/SdkForJavaV2/route53-recovery-cluster-2019-12-02/UpdateRoutingControlState) in *AWS SDK for Java 2.x API Reference*. 

------
#### [ Python ]

**SDK for Python (Boto3)**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/python/example_code/route53-recovery-cluster#code-examples). 

```
import boto3


def create_recovery_client(cluster_endpoint):
    """
    Creates a Boto3 Route 53 Application Recovery Controller client for the specified
    cluster endpoint URL and AWS Region.

    :param cluster_endpoint: The cluster endpoint URL and Region.
    :return: The Boto3 client.
    """
    return boto3.client(
        "route53-recovery-cluster",
        endpoint_url=cluster_endpoint["Endpoint"],
        region_name=cluster_endpoint["Region"],
    )



def update_routing_control_state(
    routing_control_arn, cluster_endpoints, routing_control_state
):
    """
    Updates the state of a routing control. Cluster endpoints are tried in
    sequence until the first successful response is received.

    :param routing_control_arn: The ARN of the routing control to update the state for.
    :param cluster_endpoints: The list of cluster endpoints to try.
    :param routing_control_state: The new routing control state.
    :return: The routing control update response.
    """

    # As a best practice, we recommend choosing a random cluster endpoint to get or set routing control states.
    # For more information, see https://docs.aws.amazon.com/r53recovery/latest/dg/route53-arc-best-practices.html#route53-arc-best-practices.regional
    random.shuffle(cluster_endpoints)
    for cluster_endpoint in cluster_endpoints:
        try:
            recovery_client = create_recovery_client(cluster_endpoint)
            response = recovery_client.update_routing_control_state(
                RoutingControlArn=routing_control_arn,
                RoutingControlState=routing_control_state,
            )
            return response
        except Exception as error:
            print(error)
```
+  For API details, see [UpdateRoutingControlState](https://docs.aws.amazon.com/goto/boto3/route53-recovery-cluster-2019-12-02/UpdateRoutingControlState) in *AWS SDK for Python (Boto3) API Reference*. 

------
#### [ SAP ABAP ]

**SDK for SAP ABAP**  
 There's more on GitHub. Find the complete example and learn how to set up and run in the [AWS Code Examples Repository](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/r5v#code-examples). 

```
    CONSTANTS cv_pfl TYPE /aws1/rt_profile_id VALUE 'ZCODE_DEMO'.
    DATA lo_exception TYPE REF TO /aws1/cx_rt_generic.
    DATA lo_session TYPE REF TO /aws1/cl_rt_session_base.
    DATA lo_client TYPE REF TO /aws1/if_r5v.
    DATA lt_endpoints TYPE TABLE OF string.
    DATA lv_endpoint TYPE string.
    DATA lv_region TYPE /aws1/rt_region_id.

    " Parse the comma-separated cluster endpoints
    " Expected format: "https://endpoint1.com|us-west-2,https://endpoint2.com|us-east-1"
    SPLIT iv_cluster_endpoints AT ',' INTO TABLE lt_endpoints.

    " As a best practice, shuffle cluster endpoints to distribute load
    " For more information, see https://docs.aws.amazon.com/r53recovery/latest/dg/route53-arc-best-practices.html#route53-arc-best-practices.regional
    " For simplicity, we'll try them in order (shuffling can be added if needed)

    " Try each endpoint in order
    LOOP AT lt_endpoints INTO lv_endpoint.
      TRY.
          " Parse endpoint and region from the format "url|region"
          DATA(lv_pos) = find( val = lv_endpoint sub = '|' ).
          IF lv_pos > 0.
            DATA(lv_url) = substring( val = lv_endpoint len = lv_pos ).
            lv_region = substring( val = lv_endpoint off = lv_pos + 1 ).
          ELSE.
            " If no region specified, use default
            lv_url = lv_endpoint.
            lv_region = 'us-east-1'.
          ENDIF.

          " Create session for this region
          lo_session = /aws1/cl_rt_session_aws=>create( cv_pfl ).

          " Create client with the specific endpoint
          lo_client = create_recovery_client(
            iv_endpoint = lv_url
            iv_region   = lv_region
            io_session  = lo_session ).

          " Try to update the routing control state
          oo_result = lo_client->updateroutingcontrolstate(
            iv_routingcontrolarn     = iv_routing_control_arn
            iv_routingcontrolstate   = iv_routing_control_state
            it_safetyrulestooverride = it_safety_rules_override ).

          " If successful, return the result
          RETURN.

        CATCH /aws1/cx_r5vendpttmpyunavailex INTO DATA(lo_endpoint_ex).
          " This endpoint is temporarily unavailable, try the next one
          lo_exception = lo_endpoint_ex.
          CONTINUE.

        CATCH /aws1/cx_r5vaccessdeniedex
              /aws1/cx_r5vconflictexception
              /aws1/cx_r5vinternalserverex
              /aws1/cx_r5vresourcenotfoundex
              /aws1/cx_r5vthrottlingex
              /aws1/cx_r5vvalidationex
              /aws1/cx_rt_generic INTO lo_exception.
          " For other errors, re-raise immediately
          RAISE EXCEPTION lo_exception.
      ENDTRY.
    ENDLOOP.

    " If we get here, all endpoints failed - re-raise the last exception
    IF lo_exception IS BOUND.
      RAISE EXCEPTION lo_exception.
    ENDIF.
```
+  For API details, see [UpdateRoutingControlState](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html) in *AWS SDK for SAP ABAP API reference*. 

------

For a complete list of AWS SDK developer guides and code examples, see [Using this service with an AWS SDK](sdk-general-information-section.md). This topic also includes information about getting started and details about previous SDK versions.