There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.

# Use `CreateSamplingRule` with an AWS SDK or CLI
<a name="xray_example_xray_CreateSamplingRule_section"></a>

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

------
#### [ CLI ]

**AWS CLI**  
**To create a sampling rule**  
The following `create-sampling-rule` example creates a rule to control sampling behavior for instrumented applications. The rules are provided by a JSON file. The majority of the sampling rule fields are required to create the rule.  

```
aws xray create-sampling-rule \
    --cli-input-json {{file://9000-base-scorekeep.json}}
```
Contents of `9000-base-scorekeep.json`:  

```
{
    "SamplingRule": {
        "RuleName": "base-scorekeep",
        "ResourceARN": "*",
        "Priority": 9000,
        "FixedRate": 0.1,
        "ReservoirSize": 5,
        "ServiceName": "Scorekeep",
        "ServiceType": "*",
        "Host": "*",
        "HTTPMethod": "*",
        "URLPath": "*",
        "Version": 1
    }
}
```
Output:  

```
{
    "SamplingRuleRecord": {
        "SamplingRule": {
            "RuleName": "base-scorekeep",
            "RuleARN": "arn:aws:xray:us-west-2:123456789012:sampling-rule/base-scorekeep",
            "ResourceARN": "*",
            "Priority": 9000,
            "FixedRate": 0.1,
            "ReservoirSize": 5,
            "ServiceName": "Scorekeep",
            "ServiceType": "*",
            "Host": "*",
            "HTTPMethod": "*",
            "URLPath": "*",
            "Version": 1,
            "Attributes": {}
        },
        "CreatedAt": 1530574410.0,
        "ModifiedAt": 1530574410.0
    }
}
```
For more information, see [Configuring Sampling, Groups, and Encryption Settings with the AWS X-Ray API](https://docs.aws.amazon.com/en_pv/xray/latest/devguide/xray-api-configuration.html#xray-api-configuration-sampling) in the *AWS X-Ray Developer Guide*.  
+  For API details, see [CreateSamplingRule](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/xray/create-sampling-rule.html) in *AWS CLI Command 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/xray#code-examples). 

```
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.xray.XRayClient;
import software.amazon.awssdk.services.xray.model.CreateSamplingRuleRequest;
import software.amazon.awssdk.services.xray.model.SamplingRule;
import software.amazon.awssdk.services.xray.model.XRayException;
import software.amazon.awssdk.services.xray.model.CreateSamplingRuleResponse;

/**
 * Before running this Java V2 code example, set up your development
 * environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/get-started.html
 */
public class CreateSamplingRule {
    public static void main(String[] args) {
        final String usage = """

                Usage:    <ruleName>

                Where:
                   ruleName - The name of the rule\s

                """;

        if (args.length != 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String ruleName = args[0];
        Region region = Region.US_EAST_1;
        XRayClient xRayClient = XRayClient.builder()
                .region(region)
                .build();

        createRule(xRayClient, ruleName);
    }

    public static void createRule(XRayClient xRayClient, String ruleName) {
        try {

            SamplingRule rule = SamplingRule.builder()
                    .ruleName(ruleName)
                    .priority(1)
                    .httpMethod("*")
                    .serviceType("*")
                    .serviceName("*")
                    .urlPath("*")
                    .version(1)
                    .host("*")
                    .resourceARN("*")
                    .build();

            CreateSamplingRuleRequest ruleRequest = CreateSamplingRuleRequest.builder()
                    .samplingRule(rule)
                    .build();

            CreateSamplingRuleResponse ruleResponse = xRayClient.createSamplingRule(ruleRequest);
            System.out.println(
                    "The ARN of the new rule is " + ruleResponse.samplingRuleRecord().samplingRule().ruleARN());

        } catch (XRayException e) {
            System.err.println(e.getMessage());
            System.exit(1);
        }
    }
}
```
+  For API details, see [CreateSamplingRule](https://docs.aws.amazon.com/goto/SdkForJavaV2/xray-2016-04-12/CreateSamplingRule) in *AWS SDK for Java 2.x API Reference*. 

------
#### [ Kotlin ]

**SDK for Kotlin**  
 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/kotlin/services/xray#code-examples). 

```
suspend fun createRule(ruleNameVal: String?) {
    val rule =
        SamplingRule {
            ruleName = ruleNameVal
            priority = 1
            httpMethod = "*"
            serviceType = "*"
            serviceName = "*"
            urlPath = "*"
            version = 1
            host = "*"
            resourceArn = "*"
        }

    val ruleRequest =
        CreateSamplingRuleRequest {
            samplingRule = rule
        }

    XRayClient.fromEnvironment { region = "us-east-1" }.use { xRayClient ->
        val ruleResponse: CreateSamplingRuleResponse = xRayClient.createSamplingRule(ruleRequest)
        println("The ARN of the new rule is ${ruleResponse.samplingRuleRecord?.samplingRule?.ruleArn}")
    }
}
```
+  For API details, see [CreateSamplingRule](https://sdk.amazonaws.com/kotlin/api/latest/index.html) in *AWS SDK for Kotlin API reference*. 

------