创建 Lambda 持久性函数

选择节点选项卡。

在控制台的内置代码编辑器中，会显示 Lambda 创建的函数代码。如果代码编辑器中没有显示 index.mjs 选项卡，请在文件资源管理器中选择 index.mjs，如下图所示。

将以下代码粘贴到 index.mjs 选项卡中，替换 Lambda 创建的代码。

import {
  withDurableExecution,
} from "@aws/durable-execution-sdk-js";

export const handler = withDurableExecution(
  async (event, context) => {
    const orderId = event.orderId;
    
    // Step 1: Validate order
    const validationResult = await context.step(async (stepContext) => {
      stepContext.logger.info(`Validating order ${orderId}`);
      return { orderId, status: "validated" };
    });
    
    // Step 2: Process payment
    const paymentResult = await context.step(async (stepContext) => {
      stepContext.logger.info(`Processing payment for order ${orderId}`);
      return { orderId, status: "paid", amount: 99.99 };
    });
    
    // Wait for 10 seconds to simulate external confirmation
    await context.wait({ seconds: 10 });
    
    // Step 3: Confirm order
    const confirmationResult = await context.step(async (stepContext) => {
      stepContext.logger.info(`Confirming order ${orderId}`);
      return { orderId, status: "confirmed" };
    });
        
    return {
      orderId: orderId,
      status: "completed",
      steps: [validationResult, paymentResult, confirmationResult]
    };
  }
);

在部署部分，选择部署以更新函数的代码：

选择节点选项卡。

在控制台的内置代码编辑器中，会显示 Lambda 创建的函数代码。如果代码编辑器中没有显示 lambda_function.py 选项卡，请在文件资源管理器中选择 lambda_function.py，如下图所示。

将以下代码粘贴到 lambda_function.py 选项卡中，替换 Lambda 创建的代码。

from aws_durable_execution_sdk_python import (
    DurableContext,
    durable_execution,
    durable_step,
)
from aws_durable_execution_sdk_python.config import Duration

@durable_step
def validate_order(step_context, order_id):
    step_context.logger.info(f"Validating order {order_id}")
    return {"orderId": order_id, "status": "validated"}

@durable_step
def process_payment(step_context, order_id):
    step_context.logger.info(f"Processing payment for order {order_id}")
    return {"orderId": order_id, "status": "paid", "amount": 99.99}

@durable_step
def confirm_order(step_context, order_id):
    step_context.logger.info(f"Confirming order {order_id}")
    return {"orderId": order_id, "status": "confirmed"}

@durable_execution
def lambda_handler(event, context: DurableContext):
    order_id = event['orderId']
    
    # Step 1: Validate order
    validation_result = context.step(validate_order(order_id))
    
    # Step 2: Process payment
    payment_result = context.step(process_payment(order_id))
    
    # Wait for 10 seconds to simulate external confirmation
    context.wait(Duration.from_seconds(10))
    
    # Step 3: Confirm order
    confirmation_result = context.step(confirm_order(order_id))
        
    return {
        "orderId": order_id,
        "status": "completed",
        "steps": [validation_result, payment_result, confirmation_result]
    }

在部署部分，选择部署以更新函数的代码：