Add a target using an Amazon SDK

Add an Amazon SNS topic as a target for a rule.

    /// <summary>
    /// Add an Amazon SNS target topic to a rule.
    /// </summary>
    /// <param name="ruleName">The name of the rule to update.</param>
    /// <param name="targetArn">The ARN of the Amazon SNS target.</param>
    /// <param name="eventBusArn">The optional event bus name, uses default if empty.</param>
    /// <returns>The ID of the target.</returns>
    public async Task<string> AddSnsTargetToRule(string ruleName, string targetArn, string? eventBusArn = null)
    {
        var targetID = Guid.NewGuid().ToString();

        // Create the list of targets and add a new target.
        var targets = new List<Target>
        {
            new Target()
            {
                Arn = targetArn,
                Id = targetID
            }
        };

        // Add the targets to the rule.
        var response = await _amazonEventBridge.PutTargetsAsync(
            new PutTargetsRequest()
            {
                EventBusName = eventBusArn,
                Rule = ruleName,
                Targets = targets,
            });

        if (response.FailedEntryCount > 0)
        {
            response.FailedEntries.ForEach(e =>
            {
                _logger.LogError(
                    $"Failed to add target {e.TargetId}: {e.ErrorMessage}, code {e.ErrorCode}");
            });
        }

        return targetID;
    }

Add an input transformer to a target for a rule.

    /// <summary>
    /// Update an Amazon S3 object created rule with a transform on the target.
    /// </summary>
    /// <param name="ruleName">The name of the rule.</param>
    /// <param name="targetArn">The ARN of the target.</param>
    /// <param name="eventBusArn">Optional event bus ARN. If empty, uses the default event bus.</param>
    /// <returns>The ID of the target.</returns>
    public async Task<string> UpdateS3UploadRuleTargetWithTransform(string ruleName, string targetArn, string? eventBusArn = null)
    {
        var targetID = Guid.NewGuid().ToString();

        var targets = new List<Target>
        {
            new Target()
            {
                Id = targetID,
                Arn = targetArn,
                InputTransformer = new InputTransformer()
                {
                    InputPathsMap = new Dictionary<string, string>()
                    {
                        {"bucket", "$.detail.bucket.name"},
                        {"time", "$.time"}
                    },
                    InputTemplate = "\"Notification: an object was uploaded to bucket <bucket> at <time>.\""
                }
            }
        };
        var response = await _amazonEventBridge.PutTargetsAsync(
            new PutTargetsRequest()
            {
                EventBusName = eventBusArn,
                Rule = ruleName,
                Targets = targets,
            });
        if (response.FailedEntryCount > 0)
        {
            response.FailedEntries.ForEach(e =>
            {
                _logger.LogError(
                    $"Failed to add target {e.TargetId}: {e.ErrorMessage}, code {e.ErrorCode}");
            });
        }
        return targetID;
    }

Include the required files.

#include <aws/core/Aws.h>
#include <aws/events/EventBridgeClient.h>
#include <aws/events/model/PutTargetsRequest.h>
#include <aws/events/model/PutTargetsResult.h>
#include <aws/core/utils/Outcome.h>
#include <iostream>

Add the target.

        Aws::CloudWatchEvents::EventBridgeClient cwe;

        Aws::CloudWatchEvents::Model::Target target;
        target.SetArn(lambda_arn);
        target.SetId(target_id);

        Aws::CloudWatchEvents::Model::PutTargetsRequest request;
        request.SetRule(rule_name);
        request.AddTargets(target);

        auto putTargetsOutcome = cwe.PutTargets(request);
        if (!putTargetsOutcome.IsSuccess())
        {
            std::cout << "Failed to create CloudWatch events target for rule "
                << rule_name << ": " <<
                putTargetsOutcome.GetError().GetMessage() << std::endl;
        }
        else
        {
            std::cout <<
                "Successfully created CloudWatch events target for rule "
                << rule_name << std::endl;
        }

Create the client in a separate module and export it.

import { EventBridgeClient } from "@aws-sdk/client-eventbridge";
// Set the AWS Region.
const REGION = "REGION"; //e.g. "us-east-1"
// Create an Amazon EventBridge service client object.
export const ebClient = new EventBridgeClient({ region: REGION });

Import the SDK and client modules and call the API.

// Import required AWS SDK clients and commands for Node.js.
import { PutTargetsCommand } from "@aws-sdk/client-eventbridge";
import { ebClient } from "./libs/eventBridgeClient.js";

// Set the parameters.
export const params = {
  Rule: "DEMO_EVENT",
  Targets: [
    {
      Arn: "LAMBDA_FUNCTION_ARN", //LAMBDA_FUNCTION_ARN
      Id: "myCloudWatchEventsTarget",
    },
  ],
};

export const run = async () => {
  try {
    const data = await ebClient.send(new PutTargetsCommand(params));
    console.log("Success, target added; requestID: ", data);
    return data; // For unit tests.
  } catch (err) {
    console.log("Error", err);
  }
};
// Uncomment this line to run execution within this file.
// run();

// Load the AWS SDK for Node.js
var AWS = require('aws-sdk');
// Set the region
AWS.config.update({region: 'REGION'});

// Create CloudWatchEvents service object
var ebevents = new AWS.EventBridge({apiVersion: '2015-10-07'});

var params = {
  Rule: 'DEMO_EVENT',
  Targets: [
    {
      Arn: 'LAMBDA_FUNCTION_ARN',
      Id: 'myEventBridgeTarget',
    }
  ]
};

ebevents.putTargets(params, function(err, data) {
  if (err) {
    console.log("Error", err);
  } else {
    console.log("Success", data);
  }
});