Package software.amazon.lambda.durable.examples.callback

Class CallbackExample

java.lang.Object

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

software.amazon.lambda.durable.examples.callback.CallbackExample

All Implemented Interfaces:

com.amazonaws.services.lambda.runtime.RequestStreamHandler

public class CallbackExample
extends DurableHandler<ApprovalRequest,String>

Example demonstrating callback operations for external system integration.

This handler demonstrates a human approval workflow:

1. Prepare the request for approval
2. Create a callback and send the callback ID to an external approval system
3. Suspend execution until the external system responds
4. Process the approval result

External systems respond using AWS Lambda APIs:

• SendDurableExecutionCallbackSuccess - approve with result
• SendDurableExecutionCallbackFailure - reject with error
• SendDurableExecutionCallbackHeartbeat - keep callback alive

Constructor Summary

Constructors

Constructor	Description
CallbackExample()

Method Summary

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

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

createConfiguration, getConfiguration, handleRequest

Methods inherited from class java.lang.Object

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

Constructor Details

CallbackExample

public CallbackExample()

Method Details

handleRequest

public String handleRequest(ApprovalRequest input,
 DurableContext context)

Description copied from class: DurableHandler

Handle the durable execution.

Specified by:

handleRequest in class DurableHandler<ApprovalRequest,String>

Parameters:

input - User input

context - Durable context for operations

Returns:

Result