Amazon EventBridge

Serverless event bus for building event-driven architectures and integrating applications

What is EventBridge?

Amazon EventBridge is a serverless event bus that makes it easy to connect applications together using data from your own apps, integrated Software-as-a-Service (SaaS) applications, and other AWS services. EventBridge enables you to build event-driven architectures by routing events between services, applications, and systems in real-time.

💡 Key Innovation: EventBridge provides a centralized, scalable event routing system that eliminates the need for point-to-point integrations, enabling loose coupling between services.

Real-time

Event delivery

Serverless

No infrastructure

Scalable

Millions of events

Cost-effective

Pay per event

Core Components

EventBridge consists of several key components that work together to create a comprehensive event-driven architecture.

🚌 Event Bus

Central router that receives events

Default, custom, and partner event buses

📋 Events

JSON objects with event data

Schema registry and discovery

🎯 Rules

Filter and route events

Event patterns and content filtering

🎪 Targets

Destinations for matched events

Lambda, SQS, SNS, Step Functions, and more

📝 Schemas

Event structure definitions

Code generation and validation

Event Sources

☁️ AWS Services

Over 200 AWS services emit events to EventBridge by default, including EC2, S3, Lambda, RDS, and more.

{
  "version": "0",
  "id": "12345678-1234-1234-1234-123456789012",
  "detail-type": "EC2 Instance State-change Notification",
  "source": "aws.ec2",
  "account": "123456789012",
  "time": "2024-01-20T10:30:00Z",
  "region": "us-east-1",
  "resources": ["arn:aws:ec2:us-east-1:123456789012:instance/i-1234567890abcdef0"],
  "detail": {
    "instance-id": "i-1234567890abcdef0",
    "state": "running"
  }
}

🤝 SaaS Partners

Integration with popular SaaS applications like Shopify, Zendesk, Stripe, and Datadog.

Shopify

Zendesk

Stripe

Datadog

🏗️ Custom Applications

Your own applications can publish custom events using PutEvents API or AWS SDKs.

import boto3

client = boto3.client('events')

response = client.put_events(
    Entries=[
        {
            'Source': 'com.myapp.orders',
            'DetailType': 'Order Created',
            'Detail': '{"order_id": "12345", "amount": 99.99}',
            'EventBusName': 'default'
        }
    ]
)

Event Patterns

Event patterns are JSON objects that define filter criteria for routing events to specific targets.

Pattern Examples

Filter by Source:

{
  "source": ["aws.ec2"]
}

Filter by Content:

{
  "source": ["aws.ec2"],
  "detail-type": ["EC2 Instance State-change Notification"],
  "detail": {
    "state": ["running", "stopped"]
  }
}

Advanced Filtering:

{
  "source": ["com.myapp.orders"],
  "detail": {
    "amount": [{ "numeric": [">=", 100] }],
    "customer": {
      "tier": ["premium", "enterprise"]
    }
  }
}

Common Use Cases

🔄 Microservices Integration

Decouple microservices by using events for communication instead of direct API calls.

🔔 Automated Workflows

Trigger automated workflows in response to infrastructure changes or business events.

📊 Data Pipeline Orchestration

Coordinate ETL processes and data pipeline stages based on completion events.

🔒 Security Monitoring

Monitor security events and trigger automated responses to suspicious activities.

💰 Revenue Recognition

Process financial events and trigger revenue recognition workflows.

📱 Real-time Notifications

Send notifications to users based on application events and status changes.

Advanced Features

📦 Archive and Replay

Store events for later analysis and replay them for testing or recovery scenarios.

📝 Schema Registry

Discover, create, and manage schemas for events. Automatically generate code bindings for popular programming languages.

🌐 API Destinations

Send events to external HTTP/HTTPS endpoints with authentication and rate limiting.

🔧 EventBridge Pipes

Point-to-point integration between sources and targets with built-in filtering and transformation.

Pricing

💰 Cost Structure: Pay only for what you use - $1.00 per million published events (first million events free)

Component	Pricing	Free Tier
Published Events	$1.00 per million	1 million events/month
Schema Discovery	$0.10 per schema	100 schemas/month
Archive Storage	$0.10 per GB/month	First GB free

Learn More

📚 Essential Resources

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