Integrazione con Amazon EventBridge
Utilizzate Amazon EventBridge per creare bus di eventi, instradare eventi provenienti da diverse origini e realizzare potenti integrazioni basate su eventi nel vostro account AWS.
Integrazione con Amazon EventBridge è una lezione Serverless AWS Lambda Development gratuita su CoddyKit. Questa è la lezione 2 di 4. Puoi leggere la lezione completa qui gratuitamente — poi esercitati direttamente nel browser con un editor di codice integrato e un tutor IA disponibile 24/7. Fa parte del percorso di apprendimento Serverless AWS Lambda Development, e i tuoi progressi si sincronizzano tra il web e l'app CoddyKit. Il corso Serverless AWS Lambda Development include 4 lezioni in totale.
Parti di questa lezione non sono ancora state tradotte e vengono mostrate in inglese.
What is Amazon EventBridge?
Welcome to a deeper dive into event-driven architectures! Today, we'll explore Amazon EventBridge, a powerful service that acts as a central nervous system for your serverless applications.
EventBridge is a serverless event bus that makes it easy to connect applications together using data from your own apps, Software-as-a-Service (SaaS) applications, and AWS services.
EventBridge Core Concepts
EventBridge operates on a few key concepts:
- Event Bus: A pipeline that receives events. There's a Default Event Bus for AWS service events, and you can create Custom Event Buses.
- Rules: Filters that match incoming events based on their content (event patterns).
- Targets: The AWS services or endpoints that an event is sent to when a rule matches.
The Default Event Bus
Every AWS account automatically has a Default Event Bus. This bus receives events from over 200 AWS services, like S3, EC2, Lambda, and CloudTrail.
You don't need to configure these sources; they publish events to the default bus automatically. This allows you to react to changes and activities across your AWS environment without custom code.
Custom Event Buses & Sources
While the default bus handles AWS events, you can create Custom Event Buses to manage events from your own applications or third-party SaaS providers.
This allows you to centralize event routing for your entire ecosystem. Event sources can be:
- AWS Services: (via Default Bus)
- SaaS Partners: (e.g., Zendesk, Shopify)
- Custom Applications: Your own microservices or monoliths.
Creating Event Patterns (Rules)
Rules are how EventBridge knows which events to route where. Each rule has an event pattern, a JSON structure that defines the criteria an event must meet to be matched.
Event patterns can match specific fields, prefixes, or even check for the existence of fields. They are highly flexible for filtering.
Event Pattern Example
Here's an example of an event pattern that matches any PutObject operation on an S3 bucket:
This pattern ensures only S3 object creation events trigger the rule.
{
"source": ["aws.s3"],
"detail-type": ["AWS API Call via CloudTrail"],
"detail": {
"eventSource": ["s3.amazonaws.com"],
"eventName": ["PutObject"]
}
}EventBridge Targets
Once an event matches a rule, EventBridge sends it to one or more targets. Targets are the downstream services that process the event.
Common targets include:
- AWS Lambda functions
- Amazon SQS queues
- Amazon SNS topics
- AWS Step Functions state machines
- Kinesis streams
- and many more!
Lambda as an EventBridge Target
Lambda functions are a very common target for EventBridge. When a rule matches an event, EventBridge invokes your Lambda function, passing the event data as the input.
This allows you to build highly responsive, event-driven microservices that react to changes across your AWS environment or custom applications.
Handling EventBridge Events in Lambda
Let's look at a Python Lambda function designed to receive and process an EventBridge event. The event parameter will contain the full JSON event payload.
We'll simulate an S3 PutObject event for demonstration.
import json
def lambda_handler(event, context):
print("Received event from EventBridge:")
print(json.dumps(event, indent=2))
source = event.get('source')
detail_type = event.get('detail-type')
if source == 'aws.s3' and detail_type == 'AWS API Call via CloudTrail':
bucket_name = event['detail']['requestParameters']['bucketName']
object_key = event['detail']['requestParameters']['key']
print(f"S3 PutObject event detected for bucket: {bucket_name}, key: {object_key}")
else:
print(f"Unknown event source: {source}, detail-type: {detail_type}")
return {
'statusCode': 200,
'body': json.dumps('Event processed successfully!')
}
# Simulate a local invocation for testing
if __name__ == '__main__':
sample_s3_event = {
"version": "0",
"id": "c6183e20-7f51-4091-8656-e23a31c51e0f",
"detail-type": "AWS API Call via CloudTrail",
"source": "aws.s3",
"account": "123456789012",
"time": "2023-10-27T10:00:00Z",
"region": "us-east-1",
"resources": [],
"detail": {
"eventSource": "s3.amazonaws.com",
"eventName": "PutObject",
"requestParameters": {
"bucketName": "my-cool-bucket",
"key": "new-image.jpg"
}
}
}
print("--- Simulating Lambda with EventBridge event ---")
lambda_handler(sample_s3_event, None)
print("--- Simulation complete ---")EventBridge Quick Check
You want to trigger a Lambda function whenever a new user signs up in your custom application. Your application publishes a UserSignedUp event to your custom event bus.
Which of the following event patterns would correctly match this specific event?
Recap: EventBridge Power
In this lesson, we explored Amazon EventBridge, understanding its role as a central event bus for your serverless applications. You learned about:
- Event Buses: Default, Custom, and Partner.
- Rules: Using event patterns to filter events.
- Targets: Sending matched events to services like Lambda.
- How to integrate Lambda to process EventBridge events.
EventBridge is key to building scalable, loosely coupled, and responsive event-driven architectures.
Domande Frequenti
La lezione «Integrazione con Amazon EventBridge» è gratuita?
Sì — il testo completo di «Integrazione con Amazon EventBridge» è gratuito qui sul web. Per esercitarvi in modo interattivo (un editor di codice integrato e un tutor IA 24/7) e sbloccare il resto del corso Serverless AWS Lambda Development, passa a CoddyKit PRO. Il corso Serverless AWS Lambda Development include 4 lezioni in totale.
Cosa imparerò in «Integrazione con Amazon EventBridge»?
Utilizzate Amazon EventBridge per creare bus di eventi, instradare eventi provenienti da diverse origini e realizzare potenti integrazioni basate su eventi nel vostro account AWS. Eserciti Serverless AWS Lambda Development con codice pratico che esegui direttamente nel browser, e un tutor IA 24/7 risponde alle tue domande mentre lavori sulla lezione.
Ho bisogno di esperienza per iniziare Serverless AWS Lambda Development?
Non è richiesta alcuna esperienza precedente. Serverless AWS Lambda Development su CoddyKit è strutturato per principianti e studenti avanzati, quindi puoi iniziare da qui o dall'inizio e procedere al tuo ritmo. Questa è la lezione 2 di 4.
Quanto tempo richiede la lezione «Integrazione con Amazon EventBridge»?
La maggior parte delle lezioni CoddyKit richiede circa 5–10 minuti. Ogni lezione è breve e interattiva, quindi fai progressi costanti e riprendi esattamente da dove hai lasciato su web e app.
Posso scrivere ed eseguire codice in questa lezione Serverless AWS Lambda Development?
Sì. Ogni lezione Serverless AWS Lambda Development include un editor di codice integrato, quindi scrivi ed esegui codice reale direttamente nel tuo browser e ricevi feedback istantaneo dall'IA — nessuna configurazione locale necessaria.
Tutte le lezioni di questo corso
- Creazione di microservizi basati su eventi
- Integrazione con Amazon EventBridge
- Elaborazione in tempo reale con Kinesis
- Il pattern Saga per le transazioni distribuite