使用 Amazon SDK 的 CloudWatch 代码示例 - Amazon CloudWatch
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使用 Amazon SDK 的 CloudWatch 代码示例

以下代码示例展示如何将 CloudWatch 与 Amazon 软件开发工具包 (SDK) 结合使用。

操作是大型程序的代码摘录,必须在上下文中运行。您可以通过操作了解如何调用单个服务函数,还可以通过函数相关场景和跨服务示例的上下文查看操作。

场景是指显示如何通过在同一服务中调用多个函数来完成特定任务的代码示例。

有关 Amazon SDK 开发人员指南和代码示例的完整列表,请参阅 将 CloudWatch 与 Amazon SDK 结合使用。本主题还包括有关入门的信息以及有关先前的 SDK 版本的详细信息。

开始使用

以下代码示例显示如何开始使用 CloudWatch。

.NET
Amazon SDK for .NET
注意

查看 GitHub,了解更多信息。在 Amazon 代码示例存储库 中查找完整示例,了解如何进行设置和运行。

using Amazon.CloudWatch; using Amazon.CloudWatch.Model; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; namespace CloudWatchActions; public static class HelloCloudWatch { static async Task Main(string[] args) { // Use the AWS .NET Core Setup package to set up dependency injection for the Amazon CloudWatch service. // Use your AWS profile name, or leave it blank to use the default profile. using var host = Host.CreateDefaultBuilder(args) .ConfigureServices((_, services) => services.AddAWSService<IAmazonCloudWatch>() ).Build(); // Now the client is available for injection. var cloudWatchClient = host.Services.GetRequiredService<IAmazonCloudWatch>(); // You can use await and any of the async methods to get a response. var metricNamespace = "AWS/Billing"; var response = await cloudWatchClient.ListMetricsAsync(new ListMetricsRequest { Namespace = metricNamespace }); Console.WriteLine($"Hello Amazon CloudWatch! Following are some metrics available in the {metricNamespace} namespace:"); Console.WriteLine(); foreach (var metric in response.Metrics.Take(5)) { Console.WriteLine($"\tMetric: {metric.MetricName}"); Console.WriteLine($"\tNamespace: {metric.Namespace}"); Console.WriteLine($"\tDimensions: {string.Join(", ", metric.Dimensions.Select(m => $"{m.Name}:{m.Value}"))}"); Console.WriteLine(); } } }
  • 有关 API 详细信息,请参阅《Amazon SDK for .NET API 参考》中的 ListMetrics

Java
适用于 Java 2.x 的 SDK
注意

在 GitHub 上查看更多内容。在 Amazon 代码示例存储库 中查找完整示例,了解如何进行设置和运行。

import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.cloudwatch.CloudWatchClient; import software.amazon.awssdk.services.cloudwatch.model.CloudWatchException; import software.amazon.awssdk.services.cloudwatch.model.ListMetricsRequest; import software.amazon.awssdk.services.cloudwatch.paginators.ListMetricsIterable; /** * 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 HelloService { public static void main(String[] args) { final String usage = """ Usage: <namespace>\s Where: namespace - The namespace to filter against (for example, AWS/EC2).\s """; if (args.length != 1) { System.out.println(usage); System.exit(1); } String namespace = args[0]; Region region = Region.US_EAST_1; CloudWatchClient cw = CloudWatchClient.builder() .region(region) .build(); listMets(cw, namespace); cw.close(); } public static void listMets( CloudWatchClient cw, String namespace) { try { ListMetricsRequest request = ListMetricsRequest.builder() .namespace(namespace) .build(); ListMetricsIterable listRes = cw.listMetricsPaginator(request); listRes.stream() .flatMap(r -> r.metrics().stream()) .forEach(metrics -> System.out.println(" Retrieved metric is: " + metrics.metricName())); } catch (CloudWatchException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } }
  • 有关 API 详细信息,请参阅《Amazon SDK for Java 2.x API 参考》中的 ListMetrics

Kotlin
适用于 Kotlin 的 SDK
注意

查看 GitHub,了解更多信息。在 Amazon 代码示例存储库 中查找完整示例,了解如何进行设置和运行。

/** Before running this Kotlin 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-kotlin/latest/developer-guide/setup.html */ suspend fun main(args: Array<String>) { val usage = """ Usage: <namespace> Where: namespace - The namespace to filter against (for example, AWS/EC2). """ if (args.size != 1) { println(usage) exitProcess(0) } val namespace = args[0] listAllMets(namespace) } suspend fun listAllMets(namespaceVal: String?) { val request = ListMetricsRequest { namespace = namespaceVal } CloudWatchClient { region = "us-east-1" }.use { cwClient -> cwClient.listMetricsPaginated(request) .transform { it.metrics?.forEach { obj -> emit(obj) } } .collect { obj -> println("Name is ${obj.metricName}") println("Namespace is ${obj.namespace}") } } }
  • 有关 API 详细信息,请参阅《Amazon SDK for Kotlin API 参考》中的 ListMetrics