AWS Lambda Python vs. Node.js performance benchmark (antonputra#96)

Author: antonputra

Diff for: docs/contents.md

@@ -57,3 +57,4 @@
 - [123 - Creating a Linux service with systemd](../lessons/123)
 - [124 - AWS Lambda Go vs. Node.js performance benchmark](../lessons/124)
 - [125 - How to create EKS Cluster using Terraform MODULES?](../lessons/125)
+- [126 - AWS Lambda Python vs. Node.js performance benchmark](../lessons/126)

Diff for: lessons/126/README.md

@@ -0,0 +1,3 @@
+# AWS Lambda Python vs. Node.js performance benchmark
+
+You can find tutorial [here](https://antonputra.com/python/python-vs-nodejs-benchmark/).

Diff for: lessons/126/functions/nodejs/function.js

@@ -0,0 +1,48 @@
+const aws = require('aws-sdk');
+const s3 = new aws.S3();
+const ddb = new aws.DynamoDB({ apiVersion: '2012-08-10' });
+
+// Download the S3 object and print content
+const getS3Object = (bucket, key, callback) => {
+    const params = {
+        Bucket: bucket,
+        Key: key
+    };
+
+    s3.getObject(params, (err, data) => {
+        if (err) return err;
+        console.log(data);
+        callback(data.LastModified);
+    });
+};
+
+// Save the item to the DynamoDB table
+const save = (table, date, callback) => {
+    const modifiedDate = date.toISOString()
+    const params = {
+        TableName: table,
+        Item: { 'LastModified': { S: modifiedDate } }
+    };
+
+    ddb.putItem(params, (err, data) => {
+        if (err) return err;
+        callback(null, 200);
+    });
+};
+
+// Returns a random number between min and max
+const getRandomInt = (min, max) => {
+    return Math.random() * (max - min) + min;
+};
+
+exports.lambda_handler = (event, context, callback) => {
+    const bucket = process.env.BUCKET_NAME;
+    const key = 'thumbnail.png';
+    const table = 'Meta';
+
+    getS3Object(bucket, key, (date) => {
+        const randomNumberOfDays = getRandomInt(0, 100000);
+        date.setDate(date.getDate() + randomNumberOfDays);
+        save(table, date, callback);
+    });
+};