There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.
# Use `ListBaselines` with an AWS SDK
The following code examples show how to use `ListBaselines`.
Action examples are code excerpts from larger programs and must be run in context. You can see this action in context in the following code example:
+ [Learn the basics](controltower_example_controltower_Scenario_section.md)
------
#### [ .NET ]
**SDK for .NET (v4)**
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/dotnetv4/ControlTower#code-examples).
```
///
/// List all baselines.
///
/// A list of baseline summaries.
public async Task> ListBaselinesAsync()
{
try
{
var baselines = new List();
var baselinesPaginator = _controlTowerService.Paginators.ListBaselines(new ListBaselinesRequest());
await foreach (var response in baselinesPaginator.Responses)
{
baselines.AddRange(response.Baselines);
}
return baselines;
}
catch (AmazonControlTowerException ex)
{
Console.WriteLine($"Couldn't list baselines. Here's why: {ex.ErrorCode}: {ex.Message}");
throw;
}
}
```
+ For API details, see [ListBaselines](https://docs.aws.amazon.com/goto/DotNetSDKV4/controltower-2018-05-10/ListBaselines) in *AWS SDK for .NET API Reference*.
------
#### [ 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/controltower#code-examples).
```
/**
* Lists all available baselines using pagination to retrieve complete results.
*
* @return a list of all baselines
* @throws ControlTowerException if a service-specific error occurs
* @throws SdkException if an SDK error occurs
*/
public CompletableFuture> listBaselinesAsync() {
System.out.println("Starting list baselines paginator…");
ListBaselinesRequest request = ListBaselinesRequest.builder().build();
ListBaselinesPublisher paginator =
getAsyncClient().listBaselinesPaginator(request);
List baselines = new ArrayList<>();
return paginator.subscribe(response -> {
if (response.baselines() != null && !response.baselines().isEmpty()) {
response.baselines().forEach(baseline -> {
baselines.add(baseline);
});
} else {
System.out.println("Page contained no baselines.");
}
})
.thenRun(() ->
System.out.println("Successfully listed baselines. Total: " + baselines.size())
)
.thenApply(v -> baselines)
.exceptionally(ex -> {
Throwable cause = ex.getCause() != null ? ex.getCause() : ex;
if (cause instanceof ControlTowerException e) {
String errorCode = e.awsErrorDetails().errorCode();
if ("AccessDeniedException".equals(errorCode)) {
throw new CompletionException(
"Access denied when listing baselines: %s".formatted(e.getMessage()),
e
);
}
throw new CompletionException(
"Error listing baselines: %s".formatted(e.getMessage()),
e
);
}
if (cause instanceof SdkException) {
throw new CompletionException(
"SDK error listing baselines: %s".formatted(cause.getMessage()),
cause
);
}
throw new CompletionException("Failed to list baselines", cause);
});
}
```
+ For API details, see [ListBaselines](https://docs.aws.amazon.com/goto/SdkForJavaV2/controltower-2018-05-10/ListBaselines) 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/controltower#code-examples).
```
class ControlTowerWrapper:
"""Encapsulates AWS Control Tower and Control Catalog functionality."""
def __init__(
self, controltower_client: boto3.client, controlcatalog_client: boto3.client
):
"""
:param controltower_client: A Boto3 Amazon ControlTower client.
:param controlcatalog_client: A Boto3 Amazon ControlCatalog client.
"""
self.controltower_client = controltower_client
self.controlcatalog_client = controlcatalog_client
@classmethod
def from_client(cls):
controltower_client = boto3.client("controltower")
controlcatalog_client = boto3.client("controlcatalog")
return cls(controltower_client, controlcatalog_client)
def list_baselines(self):
"""
Lists all baselines.
:return: List of baselines.
:raises ClientError: If the listing operation fails.
"""
try:
paginator = self.controltower_client.get_paginator("list_baselines")
baselines = []
for page in paginator.paginate():
baselines.extend(page["baselines"])
return baselines
except ClientError as err:
if err.response["Error"]["Code"] == "AccessDeniedException":
logger.error(
"Access denied. Please ensure you have the necessary permissions."
)
else:
logger.error(
"Couldn't list baselines. Here's why: %s: %s",
err.response["Error"]["Code"],
err.response["Error"]["Message"],
)
raise
```
+ For API details, see [ListBaselines](https://docs.aws.amazon.com/goto/boto3/controltower-2018-05-10/ListBaselines) 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/ctt#code-examples).
```
DATA lt_baselines TYPE /aws1/cl_cttbaselinesummary=>tt_baselines.
DATA lv_nexttoken TYPE /aws1/cttstring.
" List all baselines using pagination
DO.
DATA(lo_output) = io_ctt->listbaselines(
iv_nexttoken = lv_nexttoken
).
APPEND LINES OF lo_output->get_baselines( ) TO lt_baselines.
lv_nexttoken = lo_output->get_nexttoken( ).
IF lv_nexttoken IS INITIAL.
EXIT.
ENDIF.
ENDDO.
ot_baselines = lt_baselines.
MESSAGE 'Listed baselines successfully.' TYPE 'I'.
```
+ For API details, see [ListBaselines](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html) in *AWS SDK for SAP ABAP API reference*.
------