概要
LambdaにデプロイしたNode.jsからDynamoDBに接続し、データを取得する。
早い話が下記図を実施します。
TBLの準備
下記TBLを用意します。マイグレーション方法はリンクを参考にしてください。
ディレクトリ構成
ディレクトリ構成
~/develop/study/aws/dynamo2 $ tree -I node_modules
.
├── dynamo.js
├── package.json
├── serverless.yml
└── yarn.lock
dynamo.js
'use strict';
require('dotenv').config()
var AWS = require('aws-sdk');
var documentClient = new AWS.DynamoDB.DocumentClient({
region: "ap-northeast-1",
accessKeyId: process.env.ACCESS_KEY,
secretAccessKey: process.env.SECRET_KEY
});
module.exports.olympic = async (event) => {
var params = {
TableName: 'Olympic',
Key: {
'Id': 1,
'Country': '日本'
}
};
var result;
try {
result = await documentClient.get(params).promise();
}
catch (e) {
result = e;
}
const country = result.Item.Country
const goldMedal = result.Item.Medal.GoldMedal
const silverMedal = result.Item.Medal.SilverMedal
const bronzeMedal = result.Item.Medal.BronzeMedal
let message = country +'金メダル:' + goldMedal + ' 銀メダル' + silverMedal +' 銅メダル:'+ bronzeMedal
return {
statusCode: 200,
body: JSON.stringify(message),
};
};
serverless.yml
service: dynamodb2
frameworkVersion: '2'
provider:
name: aws
runtime: nodejs12.x
lambdaHashingVersion: 20201221
region: ap-northeast-1
plugins:
- serverless-offline
functions:
lineWebhook:
handler: dynamo.olympic
events:
- http:
path: dynamo/webhook
method: post
ローカル実行
ローカルデプロイ
~/develop/study/aws/dynamo2 $ sls offline start
offline: Starting Offline: dev/ap-northeast-1.
offline: Offline [http for lambda] listening on http://localhost:3002
offline: Function names exposed for local invocation by aws-sdk:
* lineWebhook: dynamodb2-dev-lineWebhook
┌───────────────────────────────────────────────────────────────────────────────┐
│ │
│ POST | http://localhost:3000/dev/dynamo/webhook │
│ POST | http://localhost:3000/2015-03-31/functions/lineWebhook/invocations │
│ │
└───────────────────────────────────────────────────────────────────────────────┘
offline: [HTTP] server ready: http://localhost:3000 🚀
offline:
offline: Enter "rp" to replay the last request
実行
~/develop/study/aws/dynamo2 $ curl -XPOST http://localhost:3000/dev/dynamo/webhook
"日本金メダル:17 銀メダル11 銅メダル:11"%
サーバ実行
サーバデプロイ
~/develop/study/aws/dynamo2 $ serverless deploy
Serverless: Packaging service...
Serverless: Excluding development dependencies...
Serverless: Uploading CloudFormation file to S3...
Serverless: Uploading artifacts...
Serverless: Uploading service dynamodb2.zip file to S3 (10.79 MB)...
Serverless: Validating template...
Serverless: Updating Stack...
Serverless: Checking Stack update progress...
..............
Serverless: Stack update finished...
Service Information
service: dynamodb2
stage: dev
region: ap-northeast-1
stack: dynamodb2-dev
resources: 12
api keys:
None
endpoints:
POST - https://URL/dev/dynamo/webhook
functions:
lineWebhook: dynamodb2-dev-lineWebhook
layers:
None
Serverless: Removing old service artifacts from S3...
Serverless: Deprecation warning: Detected ".env" files. In the next major release variables from ".env" files will be automatically loaded into the serverless build process. Set "useDotenv: true" to adopt that behavior now.
More Info: https://www.serverless.com/framework/docs/deprecations/#LOAD_VARIABLES_FROM_ENV_FILES
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