Use ListMetrics with an AWS SDK or CLI - Amazon CloudWatch

Use ListMetrics with an AWS SDK or CLI

The following code examples show how to use ListMetrics.

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 examples:

.NET
AWS SDK for .NET
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

/// <summary> /// List metrics available, optionally within a namespace. /// </summary> /// <param name="metricNamespace">Optional CloudWatch namespace to use when listing metrics.</param> /// <param name="filter">Optional dimension filter.</param> /// <param name="metricName">Optional metric name filter.</param> /// <returns>The list of metrics.</returns> public async Task<List<Metric>> ListMetrics(string? metricNamespace = null, DimensionFilter? filter = null, string? metricName = null) { var results = new List<Metric>(); var paginateMetrics = _amazonCloudWatch.Paginators.ListMetrics( new ListMetricsRequest { Namespace = metricNamespace, Dimensions = filter != null ? new List<DimensionFilter> { filter } : null, MetricName = metricName }); // Get the entire list using the paginator. await foreach (var metric in paginateMetrics.Metrics) { results.Add(metric); } return results; }
  • For API details, see ListMetrics in AWS SDK for .NET API Reference.

C++
SDK for C++
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

Include the required files.

#include <aws/core/Aws.h> #include <aws/monitoring/CloudWatchClient.h> #include <aws/monitoring/model/ListMetricsRequest.h> #include <aws/monitoring/model/ListMetricsResult.h> #include <iomanip> #include <iostream>

List the metrics.

Aws::CloudWatch::CloudWatchClient cw; Aws::CloudWatch::Model::ListMetricsRequest request; if (argc > 1) { request.SetMetricName(argv[1]); } if (argc > 2) { request.SetNamespace(argv[2]); } bool done = false; bool header = false; while (!done) { auto outcome = cw.ListMetrics(request); if (!outcome.IsSuccess()) { std::cout << "Failed to list CloudWatch metrics:" << outcome.GetError().GetMessage() << std::endl; break; } if (!header) { std::cout << std::left << std::setw(48) << "MetricName" << std::setw(32) << "Namespace" << "DimensionNameValuePairs" << std::endl; header = true; } const auto &metrics = outcome.GetResult().GetMetrics(); for (const auto &metric : metrics) { std::cout << std::left << std::setw(48) << metric.GetMetricName() << std::setw(32) << metric.GetNamespace(); const auto &dimensions = metric.GetDimensions(); for (auto iter = dimensions.cbegin(); iter != dimensions.cend(); ++iter) { const auto &dimkv = *iter; std::cout << dimkv.GetName() << " = " << dimkv.GetValue(); if (iter + 1 != dimensions.cend()) { std::cout << ", "; } } std::cout << std::endl; } const auto &next_token = outcome.GetResult().GetNextToken(); request.SetNextToken(next_token); done = next_token.empty(); }
  • For API details, see ListMetrics in AWS SDK for C++ API Reference.

CLI
AWS CLI

To list the metrics for Amazon SNS

The following list-metrics example displays the metrics for Amazon SNS.

aws cloudwatch list-metrics \ --namespace "AWS/SNS"

Output:

{ "Metrics": [ { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "NotifyMe" } ], "MetricName": "PublishSize" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "CFO" } ], "MetricName": "PublishSize" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "NotifyMe" } ], "MetricName": "NumberOfNotificationsFailed" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "NotifyMe" } ], "MetricName": "NumberOfNotificationsDelivered" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "NotifyMe" } ], "MetricName": "NumberOfMessagesPublished" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "CFO" } ], "MetricName": "NumberOfMessagesPublished" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "CFO" } ], "MetricName": "NumberOfNotificationsDelivered" }, { "Namespace": "AWS/SNS", "Dimensions": [ { "Name": "TopicName", "Value": "CFO" } ], "MetricName": "NumberOfNotificationsFailed" } ] }
  • For API details, see ListMetrics in AWS CLI Command Reference.

Java
SDK for Java 2.x
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

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.model.ListMetricsResponse; import software.amazon.awssdk.services.cloudwatch.model.Metric; /** * 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 ListMetrics { 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) { boolean done = false; String nextToken = null; try { while (!done) { ListMetricsResponse response; if (nextToken == null) { ListMetricsRequest request = ListMetricsRequest.builder() .namespace(namespace) .build(); response = cw.listMetrics(request); } else { ListMetricsRequest request = ListMetricsRequest.builder() .namespace(namespace) .nextToken(nextToken) .build(); response = cw.listMetrics(request); } for (Metric metric : response.metrics()) { System.out.printf("Retrieved metric %s", metric.metricName()); System.out.println(); } if (response.nextToken() == null) { done = true; } else { nextToken = response.nextToken(); } } } catch (CloudWatchException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } } }
  • For API details, see ListMetrics in AWS SDK for Java 2.x API Reference.

JavaScript
SDK for JavaScript (v3)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

Import the SDK and client modules and call the API.

import { ListMetricsCommand } from "@aws-sdk/client-cloudwatch"; import { client } from "../libs/client.js"; export const main = () => { // Use the AWS console to see available namespaces and metric names. Custom metrics can also be created. // https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/viewing_metrics_with_cloudwatch.html const command = new ListMetricsCommand({ Dimensions: [ { Name: "LogGroupName", }, ], MetricName: "IncomingLogEvents", Namespace: "AWS/Logs", }); return client.send(command); };

Create the client in a separate module and export it.

import { CloudWatchClient } from "@aws-sdk/client-cloudwatch"; export const client = new CloudWatchClient({});
SDK for JavaScript (v2)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

// Load the AWS SDK for Node.js var AWS = require("aws-sdk"); // Set the region AWS.config.update({ region: "REGION" }); // Create CloudWatch service object var cw = new AWS.CloudWatch({ apiVersion: "2010-08-01" }); var params = { Dimensions: [ { Name: "LogGroupName" /* required */, }, ], MetricName: "IncomingLogEvents", Namespace: "AWS/Logs", }; cw.listMetrics(params, function (err, data) { if (err) { console.log("Error", err); } else { console.log("Metrics", JSON.stringify(data.Metrics)); } });
Kotlin
SDK for Kotlin
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

suspend fun listMets(namespaceVal: String?): ArrayList<String>? { val metList = ArrayList<String>() val request = ListMetricsRequest { namespace = namespaceVal } CloudWatchClient { region = "us-east-1" }.use { cwClient -> val reponse = cwClient.listMetrics(request) reponse.metrics?.forEach { metrics -> val data = metrics.metricName if (!metList.contains(data)) { metList.add(data!!) } } } return metList }
  • For API details, see ListMetrics in AWS SDK for Kotlin API reference.

Python
SDK for Python (Boto3)
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

class CloudWatchWrapper: """Encapsulates Amazon CloudWatch functions.""" def __init__(self, cloudwatch_resource): """ :param cloudwatch_resource: A Boto3 CloudWatch resource. """ self.cloudwatch_resource = cloudwatch_resource def list_metrics(self, namespace, name, recent=False): """ Gets the metrics within a namespace that have the specified name. If the metric has no dimensions, a single metric is returned. Otherwise, metrics for all dimensions are returned. :param namespace: The namespace of the metric. :param name: The name of the metric. :param recent: When True, only metrics that have been active in the last three hours are returned. :return: An iterator that yields the retrieved metrics. """ try: kwargs = {"Namespace": namespace, "MetricName": name} if recent: kwargs["RecentlyActive"] = "PT3H" # List past 3 hours only metric_iter = self.cloudwatch_resource.metrics.filter(**kwargs) logger.info("Got metrics for %s.%s.", namespace, name) except ClientError: logger.exception("Couldn't get metrics for %s.%s.", namespace, name) raise else: return metric_iter
  • For API details, see ListMetrics in AWS SDK for Python (Boto3) API Reference.

Ruby
SDK for Ruby
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

# Lists available metrics for a metric namespace in Amazon CloudWatch. # # @param cloudwatch_client [Aws::CloudWatch::Client] # An initialized CloudWatch client. # @param metric_namespace [String] The namespace of the metric. # @example # list_metrics_for_namespace( # Aws::CloudWatch::Client.new(region: 'us-east-1'), # 'SITE/TRAFFIC' # ) def list_metrics_for_namespace(cloudwatch_client, metric_namespace) response = cloudwatch_client.list_metrics(namespace: metric_namespace) if response.metrics.count.positive? response.metrics.each do |metric| puts " Metric name: #{metric.metric_name}" if metric.dimensions.count.positive? puts " Dimensions:" metric.dimensions.each do |dimension| puts " Name: #{dimension.name}, Value: #{dimension.value}" end else puts "No dimensions found." end end else puts "No metrics found for namespace '#{metric_namespace}'. " \ "Note that it could take up to 15 minutes for recently-added metrics " \ "to become available." end end # Example usage: def run_me metric_namespace = "SITE/TRAFFIC" # Replace us-west-2 with the AWS Region you're using for Amazon CloudWatch. region = "us-east-1" cloudwatch_client = Aws::CloudWatch::Client.new(region: region) # Add three datapoints. puts "Continuing..." unless datapoint_added_to_metric?( cloudwatch_client, metric_namespace, "UniqueVisitors", "SiteName", "example.com", 5_885.0, "Count" ) puts "Continuing..." unless datapoint_added_to_metric?( cloudwatch_client, metric_namespace, "UniqueVisits", "SiteName", "example.com", 8_628.0, "Count" ) puts "Continuing..." unless datapoint_added_to_metric?( cloudwatch_client, metric_namespace, "PageViews", "PageURL", "example.html", 18_057.0, "Count" ) puts "Metrics for namespace '#{metric_namespace}':" list_metrics_for_namespace(cloudwatch_client, metric_namespace) end run_me if $PROGRAM_NAME == __FILE__
  • For API details, see ListMetrics in AWS SDK for Ruby API Reference.

SAP ABAP
SDK for SAP ABAP
Note

There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository.

"The following list-metrics example displays the metrics for Amazon CloudWatch." TRY. oo_result = lo_cwt->listmetrics( " oo_result is returned for testing purposes. " iv_namespace = iv_namespace ). DATA(lt_metrics) = oo_result->get_metrics( ). MESSAGE 'Metrics retrieved.' TYPE 'I'. CATCH /aws1/cx_cwtinvparamvalueex . MESSAGE 'The specified argument was not valid.' TYPE 'E'. ENDTRY.
  • For API details, see ListMetrics in AWS SDK for SAP ABAP API reference.

For a complete list of AWS SDK developer guides and code examples, see Using CloudWatch with an AWS SDK. This topic also includes information about getting started and details about previous SDK versions.