AWS 文档 AWS SDK示例 GitHub 存储库中还有更多SDK示例。
本文属于机器翻译版本。若本译文内容与英语原文存在差异,则一律以英文原文为准。
使用的代码示 CloudWatch 例 AWS SDKs
以下代码示例向您展示了如何将 Amazon CloudWatch 与 AWS 软件开发套件 (SDK) 一起使用。
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。
场景是展示如何通过在同一服务中调用多个函数来完成特定任务任务的代码示例。
跨服务示例 是指跨多个 AWS 服务工作的示例应用程序。
开始使用
以下代码示例展示了如何开始使用 CloudWatch。
- .NET
-
- AWS SDK for .NET
-
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();
}
}
}
- Java
-
- SDK适用于 Java 2.x
-
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);
}
}
}
- Kotlin
-
- SDK对于 Kotlin 来说
-
/**
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}")
}
}
}