Serverless AWS Lambda Development · 课时

AWS Lambda 入门

学习浏览 AWS 管理控制台、设置必要的 IAM 权限，并了解 Lambda 函数的基本组成部分

AWS Lambda 入门 是 CoddyKit 上的免费 Serverless AWS Lambda Development 课时。这是第 2 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Serverless AWS Lambda Development 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Serverless AWS Lambda Development 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Welcome to AWS Lambda!

Time for AWS Lambda, the serverless compute service that runs your code without any servers. You will find it in the console and learn its building blocks.

Finding Lambda in the Console

The AWS Management Console is your web interface for AWS. Search "Lambda" in the top bar and open it to reach the service dashboard.

Permissions: Why Lambda Needs Them

Your Lambda function is a tiny worker that needs permission to do anything useful. AWS controls this with IAM, granting your function an IAM role.

Understanding IAM Roles

An IAM Role is a permission set you assign to your function — a job description. Its trust policy says who can use it; its permissions policy says what it can do.

Creating a Lambda Execution Role

Every Lambda gets an execution role. The most basic one attaches AWSLambdaBasicExecutionRole so your function can write logs to CloudWatch.

Anatomy of a Lambda Function

A Lambda function is your code plus a few settings: a Runtime (the language), a Handler (the entry method), plus Memory and Timeout.

Runtime: Your Code's Engine

The Runtime tells Lambda which language environment to spin up when an event fires. Write in Java, pick a Java runtime like Java 17.

The Handler: Your Code's Entry Point

The Handler is the exact method Lambda invokes when your function is triggered — your logic's starting line. Here, Lambda calls handleRequest.

package com.example;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;

// This class represents your Lambda function
public class MyFirstLambda implements RequestHandler<String, String> {

    // The 'handleRequest' method is your function's entry point
    @Override
    public String handleRequest(String input, Context context) {
        // Lambda's logger for output
        context.getLogger().log("Received input: " + input);
        
        String output = "Hello from Lambda, " + input + "!";
        return output;
    }
}

Memory & Timeout Settings

Two settings shape speed and cost: Memory (more memory means more CPU and bandwidth) and Timeout (the max seconds before Lambda stops the run).

Quick Check!

Let's test your understanding of Lambda's foundational concepts.

Recap & Next Steps

Nice work! You found Lambda in the console and met IAM roles, runtime, handler, memory, and timeout. Next: deploy a real Hello World function.

常见问题解答

「AWS Lambda 入门」课时是免费的吗？

是的 — 「AWS Lambda 入门」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Serverless AWS Lambda Development 课程的其余内容，请升级到 CoddyKit PRO。 Serverless AWS Lambda Development 课程共包含 4 节课。

「AWS Lambda 入门」这节课中我会学到什么？

学习浏览 AWS 管理控制台、设置必要的 IAM 权限，并了解 Lambda 函数的基本组成部分你通过在浏览器中直接运行的动手代码来练习 Serverless AWS Lambda Development，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Serverless AWS Lambda Development 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Serverless AWS Lambda Development 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 2 节课，共 4 节。

「AWS Lambda 入门」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Serverless AWS Lambda Development 课中编写并运行代码吗？

能。每节 Serverless AWS Lambda Development 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

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