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aws-sdk-java-v2-lambda Provides AWS Lambda patterns using AWS SDK for Java 2.x. Use when invoking Lambda functions, creating/updating functions, managing function configurations, working with Lambda layers, or integrating Lambda with Spring Boot applications.
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8 fichiers name aws-sdk-java-v2-lambda description Provides AWS Lambda patterns using AWS SDK for Java 2.x. Use when invoking Lambda functions, creating/updating functions, managing function configurations, working with Lambda layers, or integrating Lambda with Spring Boot applications. allowed-tools Read, Write, Edit, Bash, Glob, Grep
AWS SDK for Java 2.x - AWS Lambda
Overview
AWS Lambda is a compute service that runs code without managing servers. Use this skill to implement AWS Lambda operations using AWS SDK for Java 2.x in applications and services.
When to Use
Invoking Lambda functions from Java applications
Deploying and updating Lambda functions via SDK
Managing function configurations and layers
Integrating Lambda with Spring Boot applications
Quick Reference
Operation SDK Method Use Case Invoke invoke()Synchronous/async function invocation List Functions listFunctions()Get all Lambda functions Get Config getFunction()Retrieve function configuration Create Function createFunction()Create new Lambda function Update Code
updateFunctionCode()
Update Config updateFunctionConfiguration()Modify settings (timeout, memory, env vars)
Delete Function deleteFunction()Remove Lambda function
Instructions
1. Add Dependencies Include Lambda SDK dependency in pom.xml:
<dependency >
<groupId > software.amazon.awssdk</groupId >
<artifactId > lambda</artifactId >
</dependency >
2. Create Client Instantiate LambdaClient with proper configuration:
LambdaClient lambdaClient = LambdaClient.builder()
.region(Region.US_EAST_1)
.build();
For async operations, use LambdaAsyncClient.
3. Invoke Lambda Function InvokeRequest request = InvokeRequest.builder()
.functionName("my-function" )
.payload(SdkBytes.fromUtf8String(payload))
.build();
InvokeResponse response = lambdaClient.invoke(request);
return response.payload().asUtf8String();
4. Handle Responses Parse response payloads and check for errors:
if (response.functionError() != null ) {
throw new LambdaInvocationException ("Lambda error: " + response.functionError());
}
String result = response.payload().asUtf8String();
5. Manage Functions Create, update, or delete Lambda functions:
CreateFunctionRequest createRequest = CreateFunctionRequest.builder()
.functionName("my-function" )
.runtime(Runtime.JAVA17)
.role(roleArn)
.code(code)
.build();
lambdaClient.createFunction(createRequest);
GetFunctionRequest getRequest = GetFunctionRequest.builder()
.functionName("my-function" )
.build();
GetFunctionResponse getResponse = lambdaClient.getFunction(getRequest);
if (!"Active" .equals(getResponse.configuration().state())) {
throw new IllegalStateException ("Function not active: " + getResponse.configuration().stateReason());
}
UpdateFunctionCodeRequest updateCodeRequest = UpdateFunctionCodeRequest.builder()
.functionName("my-function" )
.zipFile(SdkBytes.fromByteArray(zipBytes))
.build();
lambdaClient.updateFunctionCode(updateCodeRequest);
Waiter<GetFunctionConfigurationRequest> waiter = lambdaClient.waiter();
waiter.waitUntilFunctionUpdatedActive(GetFunctionConfigurationRequest.builder()
.functionName("my-function" )
.build());
6. Configure Environment Set environment variables and concurrency limits:
Environment env = Environment.builder()
.variables(Map.of(
"DB_URL" , "jdbc:postgresql://db" ,
"LOG_LEVEL" , "INFO"
))
.build();
UpdateFunctionConfigurationRequest configRequest = UpdateFunctionConfigurationRequest.builder()
.functionName("my-function" )
.environment(env)
.timeout(60 )
.memorySize(512 )
.build();
lambdaClient.updateFunctionConfiguration(configRequest);
7. Integrate with Spring Boot Configure Lambda beans and services:
@Configuration
public class LambdaConfiguration {
@Bean
public LambdaClient lambdaClient () {
return LambdaClient.builder()
.region(Region.US_EAST_1)
.build();
}
}
@Service
public class LambdaInvokerService {
public <T, R> R invoke (String functionName, T request, Class<R> responseType) {
}
}
8. Test Locally Use mocks or LocalStack for development testing.
Examples
Basic Invocation public String invokeFunction (LambdaClient client, String functionName, String payload) {
InvokeRequest request = InvokeRequest.builder()
.functionName(functionName)
.payload(SdkBytes.fromUtf8String(payload))
.build();
InvokeResponse response = client.invoke(request);
if (response.functionError() != null ) {
throw new RuntimeException ("Lambda error: " + response.functionError());
}
return response.payload().asUtf8String();
}
Async Invocation public void invokeAsync (LambdaClient client, String functionName, Map<String, Object> event) {
String jsonPayload = new ObjectMapper ().writeValueAsString(event);
InvokeRequest request = InvokeRequest.builder()
.functionName(functionName)
.invocationType(InvocationType.EVENT)
.payload(SdkBytes.fromUtf8String(jsonPayload))
.build();
client.invoke(request);
}
Spring Boot Service @Service
public class LambdaService {
private final LambdaClient lambdaClient;
public UserResponse processUser (UserRequest request) {
String payload = objectMapper.writeValueAsString(request);
InvokeResponse response = lambdaClient.invoke(
InvokeRequest.builder()
.functionName("user-processor" )
.payload(SdkBytes.fromUtf8String(payload))
.build()
);
return objectMapper.readValue(
response.payload().asUtf8String(),
UserResponse.class
);
}
}
Best Practices
Reuse clients : Create LambdaClient/LambdaAsyncClient once; they are thread-safeUse async client : For fire-and-forget invocations, use LambdaAsyncClient with CompletableFutureVerify deployments : Always wait for function state to be Active after create/update operationsLimit payload size : Keep request/response payloads under 256KB for async, 6MB for sync invocationsConfigure timeouts : Set client read timeout slightly higher than Lambda function timeoutUse latest runtime : Specify Runtime.JAVA17 or newer for improved cold start performance
Constraints and Warnings
Payload Limit : 6MB (sync), 256KB (async invocation)Timeout : Max 900 seconds (15 minutes) per invocationCold Starts : JVM-based functions have longer cold starts; use GraalVM Native Image for improvementDeployment Size : Function code + layers must not exceed 50MB (zipped) or 250MB (unzipped)Concurrency : Default 1000 per region; use reserved concurrency to guarantee capacityCost : Monitor with CloudWatch metrics; set billing alerts to prevent runaway costs
References
Related Skills
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