One of the most important AWS components for building event-driven apps is Eventbridge. Eventbridge has multiple features including event buses, a scheduler, pipes, and more. You can also define your own events that get sent to and can be processed by Eventbridge.
One key use of Eventbridge is reacting to AWS API calls. By default, events detailing all API calls get sent to the default event bus in Eventbridge, and you can set up rules to take almost any action on them.
This article from Bharathvajan G shows how to define your own event types and use them with Eventbridge.
URL:
Amazon Event Bridge — Send & Receive Custom Events
Practice Verified Codes and Commands:
1. Create a Custom Event Bus:
aws events create-event-bus --name MyCustomEventBus
2. Send a Custom Event to EventBridge:
aws events put-events --entries '[{"Source":"com.mycompany.myapp","DetailType":"myDetailType","Detail":"{\"key1\":\"value1\"}"}]'
- Create a Rule to Trigger a Lambda Function:
aws events put-rule --name MyRule --event-pattern "{\"source\":[\"com.mycompany.myapp\"]}" --state ENABLED aws lambda add-permission --function-name MyLambdaFunction --statement-id MyStatementId --action "lambda:InvokeFunction" --principal events.amazonaws.com --source-arn arn:aws:events:us-east-1:123456789012:rule/MyRule aws events put-targets --rule MyRule --targets Id=1,Arn=arn:aws:lambda:us-east-1:123456789012:function:MyLambdaFunction
4. List Event Buses:
aws events list-event-buses
5. Delete a Custom Event Bus:
aws events delete-event-bus --name MyCustomEventBus
What Undercode Say:
Eventbridge is a powerful AWS service that enables developers to build scalable, event-driven applications with ease. By leveraging custom event buses, rules, and targets, you can automate workflows and respond to API calls in real-time. The ability to define custom events and integrate them with other AWS services like Lambda, SNS, and SQS makes Eventbridge a versatile tool for modern cloud architectures.
For those diving into AWS Eventbridge, mastering commands like create-event-bus, put-events, and `put-rule` is essential. These commands allow you to create, manage, and trigger events seamlessly. Additionally, integrating Eventbridge with Lambda functions can help automate tasks such as data processing, notifications, and system monitoring.
To further enhance your skills, explore AWS documentation and tutorials on Eventbridge. For example, the AWS Eventbridge Developer Guide provides in-depth insights into advanced features like event filtering, cross-account event sharing, and schema registry.
In Linux environments, you can simulate event-driven workflows using tools like `cron` for scheduling and `systemd` for service management. For instance, use `cron` to trigger scripts that interact with AWS CLI:
0 * * * * /path/to/your/script.sh
For Windows users, PowerShell scripts can be used to interact with AWS services. For example, use the AWS Tools for PowerShell to send custom events:
Send-CFNEVENT -Detail @{key1="value1"} -DetailType "myDetailType" -Source "com.mycompany.myapp"
By combining AWS Eventbridge with Linux or Windows commands, you can build robust, event-driven systems that scale with your application’s needs. Whether you’re automating cloud workflows or integrating with on-premise systems, Eventbridge offers the flexibility and power to meet your requirements.
Further Reading:
References:
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