TL;DR
Learn essential patterns and best practices for designing and implementing serverless applications using AWS Lambda, including event sources, integration patterns, and best practices
Amazon Lambda enables you to run code without provisioning or managing servers. This guide explores common patterns and best practices for building serverless applications.
`` %%{init: {'theme': 'base', 'themeVariables': { 'primaryColor': '#FF9900', 'primaryTextColor': '#232F3E', 'primaryBorderColor': '#232F3E', 'lineColor': '#232F3E', 'secondaryColor': '#147EB4', 'tertiaryColor': '#232F3E', 'fontFamily': 'system-ui', 'fontSize': '14px' }}}%%
graph TB
subgraph EventSources["Event Sources"]
direction TB
API["API Gateway"]
S3["S3"]
DDB["DynamoDB"]
EventB["EventBridge"]
SQS["SQS"]
end subgraph Processing["Lambda Processing"]
direction TB
subgraph Patterns["Common Patterns"]
direction LR
Sync["Synchronous"]
Async["Asynchronous"]
Stream["Stream"]
end
subgraph Config["Configuration"]
direction LR
Memory["Memory"]
Timeout["Timeout"]
Concurrency["Concurrency"]
end
end subgraph Integration["Service Integration"]
direction TB
subgraph Storage["Data Services"]
direction LR
S3Out["S3"]
DDBOut["DynamoDB"]
RDS["RDS"]
end
subgraph Messaging["Event Services"]
direction LR
SNS["SNS"]
SQSOut["SQS"]
KDS["Kinesis"]
end
end subgraph Operations["Operational Excellence"]
direction TB
subgraph Monitor["Monitoring"]
direction LR
CW["CloudWatch"]
XRay["X-Ray"]
Logs["Logs"]
end
subgraph Security["Security"]
direction LR
IAM["IAM"]
KMS["KMS"]
SG["Security Groups"]
end
end EventSources --> Processing
Processing --> Integration
Integration --> Operations classDef sourceNode fill:#FF9900,stroke:#232F3E,color:#232F3E,stroke-width:2px,font-weight:bold
classDef processNode fill:#232F3E,stroke:#232F3E,color:#FFFFFF,stroke-width:2px,font-weight:bold
classDef integrationNode fill:#147EB4,stroke:#232F3E,color:#FFFFFF,stroke-width:2px,font-weight:bold
classDef operationsNode fill:#147EB4,stroke:#232F3E,color:#FFFFFF,stroke-width:2px,font-weight:bold
classDef groupStyle fill:transparent,stroke:#232F3E,stroke-width:2px,color:#232F3E,font-weight:bold class API,S3,DDB,EventB,SQS sourceNode
class Sync,Async,Stream,Memory,Timeout,Concurrency processNode
class S3Out,DDBOut,RDS,SNS,SQSOut,KDS integrationNode
class CW,XRay,Logs,IAM,KMS,SG operationsNode
class EventSources,Processing,Integration,Operations,Patterns,Config,Storage,Messaging,Monitor,Security groupStyle
mermaid
`
$1
$1
``javascript
exports.handler = async (event) => {
try {
// Parse API Gateway event
const body = JSON.parse(event.body);
// Process request
const result = await processRequest(body);
// Return formatted response
return {
statusCode: 200,
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
message: 'Success',
data: result
})
};
} catch (error) {
return {
statusCode: 500,
body: JSON.stringify({
message: 'Error processing request',
error: error.message
})
};
}
};
Why This Matters
Understanding the business and technical context helps you make informed decisions rather than blindly following patterns.
Trade-offs to Consider
Every architectural decision involves trade-offs. Consider your specific requirements, team expertise, and scale when evaluating options.
When NOT to Use This
Knowing when a solution doesn't apply is as valuable as knowing when it does. Consider alternatives for your specific situation.
Decision Framework
Use this framework to evaluate whether this approach is right for your use case based on your specific constraints and requirements.
