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Ejemplos de Application Auto Scaling que se utilizan SDK para Java 2.x
Los siguientes ejemplos de código muestran cómo realizar acciones e implementar escenarios comunes mediante Application Auto Scaling. AWS SDK for Java 2.x
Las acciones son extractos de código de programas más grandes y deben ejecutarse en contexto. Mientras las acciones muestran cómo llamar a las funciones de servicio individuales, es posible ver las acciones en contexto en los escenarios relacionados y en los ejemplos entre servicios.
Los escenarios son ejemplos de código que muestran cómo llevar a cabo una tarea específica llamando a varias funciones dentro del mismo servicio.
Cada ejemplo incluye un enlace a GitHub, donde puede encontrar instrucciones sobre cómo configurar y ejecutar el código en su contexto.
Temas
Acciones
En el siguiente ejemplo de código, se muestra cómo usar DeleteScalingPolicy
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- SDKpara Java 2.x
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nota
Hay más información. GitHub Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS
. import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.applicationautoscaling.ApplicationAutoScalingClient; import software.amazon.awssdk.services.applicationautoscaling.model.ApplicationAutoScalingException; import software.amazon.awssdk.services.applicationautoscaling.model.DeleteScalingPolicyRequest; import software.amazon.awssdk.services.applicationautoscaling.model.DeregisterScalableTargetRequest; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalableTargetsRequest; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalableTargetsResponse; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalingPoliciesRequest; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalingPoliciesResponse; import software.amazon.awssdk.services.applicationautoscaling.model.ScalableDimension; import software.amazon.awssdk.services.applicationautoscaling.model.ServiceNamespace; /** * 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 DisableDynamoDBAutoscaling { public static void main(String[] args) { final String usage = """ Usage: <tableId> <policyName>\s Where: tableId - The table Id value (for example, table/Music).\s policyName - The name of the policy (for example, $Music5-scaling-policy). """; if (args.length != 2) { System.out.println(usage); System.exit(1); } ApplicationAutoScalingClient appAutoScalingClient = ApplicationAutoScalingClient.builder() .region(Region.US_EAST_1) .build(); ServiceNamespace ns = ServiceNamespace.DYNAMODB; ScalableDimension tableWCUs = ScalableDimension.DYNAMODB_TABLE_WRITE_CAPACITY_UNITS; String tableId = args[0]; String policyName = args[1]; deletePolicy(appAutoScalingClient, policyName, tableWCUs, ns, tableId); verifyScalingPolicies(appAutoScalingClient, tableId, ns, tableWCUs); deregisterScalableTarget(appAutoScalingClient, tableId, ns, tableWCUs); verifyTarget(appAutoScalingClient, tableId, ns, tableWCUs); } public static void deletePolicy(ApplicationAutoScalingClient appAutoScalingClient, String policyName, ScalableDimension tableWCUs, ServiceNamespace ns, String tableId) { try { DeleteScalingPolicyRequest delSPRequest = DeleteScalingPolicyRequest.builder() .policyName(policyName) .scalableDimension(tableWCUs) .serviceNamespace(ns) .resourceId(tableId) .build(); appAutoScalingClient.deleteScalingPolicy(delSPRequest); System.out.println(policyName +" was deleted successfully."); } catch (ApplicationAutoScalingException e) { System.err.println(e.awsErrorDetails().errorMessage()); } } // Verify that the scaling policy was deleted public static void verifyScalingPolicies(ApplicationAutoScalingClient appAutoScalingClient, String tableId, ServiceNamespace ns, ScalableDimension tableWCUs) { DescribeScalingPoliciesRequest dscRequest = DescribeScalingPoliciesRequest.builder() .scalableDimension(tableWCUs) .serviceNamespace(ns) .resourceId(tableId) .build(); DescribeScalingPoliciesResponse response = appAutoScalingClient.describeScalingPolicies(dscRequest); System.out.println("DescribeScalableTargets result: "); System.out.println(response); } public static void deregisterScalableTarget(ApplicationAutoScalingClient appAutoScalingClient, String tableId, ServiceNamespace ns, ScalableDimension tableWCUs) { try { DeregisterScalableTargetRequest targetRequest = DeregisterScalableTargetRequest.builder() .scalableDimension(tableWCUs) .serviceNamespace(ns) .resourceId(tableId) .build(); appAutoScalingClient.deregisterScalableTarget(targetRequest); System.out.println("The scalable target was deregistered."); } catch (ApplicationAutoScalingException e) { System.err.println(e.awsErrorDetails().errorMessage()); } } public static void verifyTarget(ApplicationAutoScalingClient appAutoScalingClient, String tableId, ServiceNamespace ns, ScalableDimension tableWCUs) { DescribeScalableTargetsRequest dscRequest = DescribeScalableTargetsRequest.builder() .scalableDimension(tableWCUs) .serviceNamespace(ns) .resourceIds(tableId) .build(); DescribeScalableTargetsResponse response = appAutoScalingClient.describeScalableTargets(dscRequest); System.out.println("DescribeScalableTargets result: "); System.out.println(response); } }
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Para API obtener más información, consulte DeleteScalingPolicyla AWS SDK for Java 2.x APIReferencia.
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En el siguiente ejemplo de código, se muestra cómo usar RegisterScalableTarget
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- SDKpara Java 2.x
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nota
Hay más información. GitHub Busque el ejemplo completo y aprenda a configurar y ejecutar en el Repositorio de ejemplos de código de AWS
. import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.applicationautoscaling.ApplicationAutoScalingClient; import software.amazon.awssdk.services.applicationautoscaling.model.ApplicationAutoScalingException; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalableTargetsRequest; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalableTargetsResponse; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalingPoliciesRequest; import software.amazon.awssdk.services.applicationautoscaling.model.DescribeScalingPoliciesResponse; import software.amazon.awssdk.services.applicationautoscaling.model.PolicyType; import software.amazon.awssdk.services.applicationautoscaling.model.PredefinedMetricSpecification; import software.amazon.awssdk.services.applicationautoscaling.model.PutScalingPolicyRequest; import software.amazon.awssdk.services.applicationautoscaling.model.RegisterScalableTargetRequest; import software.amazon.awssdk.services.applicationautoscaling.model.ScalingPolicy; import software.amazon.awssdk.services.applicationautoscaling.model.ServiceNamespace; import software.amazon.awssdk.services.applicationautoscaling.model.ScalableDimension; import software.amazon.awssdk.services.applicationautoscaling.model.MetricType; import software.amazon.awssdk.services.applicationautoscaling.model.TargetTrackingScalingPolicyConfiguration; import java.util.List; /** * 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 EnableDynamoDBAutoscaling { public static void main(String[] args) { final String usage = """ Usage: <tableId> <roleARN> <policyName>\s Where: tableId - The table Id value (for example, table/Music). roleARN - The ARN of the role that has ApplicationAutoScaling permissions. policyName - The name of the policy to create. """; if (args.length != 3) { System.out.println(usage); System.exit(1); } System.out.println("This example registers an Amazon DynamoDB table, which is the resource to scale."); String tableId = args[0]; String roleARN = args[1]; String policyName = args[2]; ServiceNamespace ns = ServiceNamespace.DYNAMODB; ScalableDimension tableWCUs = ScalableDimension.DYNAMODB_TABLE_WRITE_CAPACITY_UNITS; ApplicationAutoScalingClient appAutoScalingClient = ApplicationAutoScalingClient.builder() .region(Region.US_EAST_1) .build(); registerScalableTarget(appAutoScalingClient, tableId, roleARN, ns, tableWCUs); verifyTarget(appAutoScalingClient, tableId, ns, tableWCUs); configureScalingPolicy(appAutoScalingClient, tableId, ns, tableWCUs, policyName); } public static void registerScalableTarget(ApplicationAutoScalingClient appAutoScalingClient, String tableId, String roleARN, ServiceNamespace ns, ScalableDimension tableWCUs) { try { RegisterScalableTargetRequest targetRequest = RegisterScalableTargetRequest.builder() .serviceNamespace(ns) .scalableDimension(tableWCUs) .resourceId(tableId) .roleARN(roleARN) .minCapacity(5) .maxCapacity(10) .build(); appAutoScalingClient.registerScalableTarget(targetRequest); System.out.println("You have registered " + tableId); } catch (ApplicationAutoScalingException e) { System.err.println(e.awsErrorDetails().errorMessage()); } } // Verify that the target was created. public static void verifyTarget(ApplicationAutoScalingClient appAutoScalingClient, String tableId, ServiceNamespace ns, ScalableDimension tableWCUs) { DescribeScalableTargetsRequest dscRequest = DescribeScalableTargetsRequest.builder() .scalableDimension(tableWCUs) .serviceNamespace(ns) .resourceIds(tableId) .build(); DescribeScalableTargetsResponse response = appAutoScalingClient.describeScalableTargets(dscRequest); System.out.println("DescribeScalableTargets result: "); System.out.println(response); } // Configure a scaling policy. public static void configureScalingPolicy(ApplicationAutoScalingClient appAutoScalingClient, String tableId, ServiceNamespace ns, ScalableDimension tableWCUs, String policyName) { // Check if the policy exists before creating a new one. DescribeScalingPoliciesResponse describeScalingPoliciesResponse = appAutoScalingClient.describeScalingPolicies(DescribeScalingPoliciesRequest.builder() .serviceNamespace(ns) .resourceId(tableId) .scalableDimension(tableWCUs) .build()); if (!describeScalingPoliciesResponse.scalingPolicies().isEmpty()) { // If policies exist, consider updating an existing policy instead of creating a new one. System.out.println("Policy already exists. Consider updating it instead."); List<ScalingPolicy> polList = describeScalingPoliciesResponse.scalingPolicies(); for (ScalingPolicy pol : polList) { System.out.println("Policy name:" +pol.policyName()); } } else { // If no policies exist, proceed with creating a new policy. PredefinedMetricSpecification specification = PredefinedMetricSpecification.builder() .predefinedMetricType(MetricType.DYNAMO_DB_WRITE_CAPACITY_UTILIZATION) .build(); TargetTrackingScalingPolicyConfiguration policyConfiguration = TargetTrackingScalingPolicyConfiguration.builder() .predefinedMetricSpecification(specification) .targetValue(50.0) .scaleInCooldown(60) .scaleOutCooldown(60) .build(); PutScalingPolicyRequest putScalingPolicyRequest = PutScalingPolicyRequest.builder() .targetTrackingScalingPolicyConfiguration(policyConfiguration) .serviceNamespace(ns) .scalableDimension(tableWCUs) .resourceId(tableId) .policyName(policyName) .policyType(PolicyType.TARGET_TRACKING_SCALING) .build(); try { appAutoScalingClient.putScalingPolicy(putScalingPolicyRequest); System.out.println("You have successfully created a scaling policy for an Application Auto Scaling scalable target"); } catch (ApplicationAutoScalingException e) { System.err.println("Error: " + e.awsErrorDetails().errorMessage()); } } } }
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Para API obtener más información, consulte RegisterScalableTargetla AWS SDK for Java 2.x APIReferencia.
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