Package software.amazon.lambda.durable.examples

Class ErrorHandlingExample

java.lang.Object

software.amazon.lambda.durable.DurableHandler<Object,String>

software.amazon.lambda.durable.examples.ErrorHandlingExample

All Implemented Interfaces:

com.amazonaws.services.lambda.runtime.RequestStreamHandler

public class ErrorHandlingExample
extends DurableHandler<Object,String>

Example demonstrating error handling patterns with the Durable Execution SDK.

This example shows how to handle:

• StepFailedException - when a step exhausts all retry attempts
• StepInterruptedException - when an AT_MOST_ONCE step is interrupted
• Custom exceptions - original exception types are preserved and can be caught directly

Note: NonDeterministicExecutionException is thrown by the SDK when code changes between executions (e.g., step order/names changed). It should be fixed in code, not caught.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ErrorHandlingExample.ServiceUnavailableException	Custom exception to demonstrate that original exception types are preserved across checkpoints.

Constructor Summary

Constructors

Constructor	Description
ErrorHandlingExample()

Method Summary

Modifier and Type	Method	Description
String	handleRequest(Object input, DurableContext context)	Handle the durable execution.

Methods inherited from class software.amazon.lambda.durable.DurableHandler

createConfiguration, createObjectMapper, getConfiguration, handleRequest

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ErrorHandlingExample

public ErrorHandlingExample()

Method Details

handleRequest

public String handleRequest(Object input,
 DurableContext context)

Description copied from class: DurableHandler

Handle the durable execution.

Specified by:

handleRequest in class DurableHandler<Object,String>

Parameters:

input - User input

context - Durable context for operations

Returns:

Result