Short post test

Justine Mae Macario — Mon, 23 Dec 2024 14:32:29 +0000

Short post test

Short Post Test

Justine Mae Macario — Mon, 23 Dec 2024 14:31:42 +0000

Short post test

Inventory Management with AWS Lambda λ

Justine Mae Macario — Fri, 20 Dec 2024 05:19:14 +0000

❔This blog describes what I did for a Simple Pharmacy Inventory Management System using AWS Lambda and other services!

📚Background: Checking and Restocking Process

A relative who wanted to open a pharmacy soon asked me about the idea of digitizing their processes. They mentioned the dread of checking inventories and restocking during their internship, so I started with that problem by incorporating AWS Lambda.

AWS Lambda lets you run code without managing servers. All that's expected from the client is the code in a language that Lambda supports. In this case, AWS Lambda is combined with AWS DynamoDB, Amazon SNS, and Amazon TimeStream.

📚Background: On AWS' Lambda Features

This AWS Service is ideal for rapid scaling. Lambda can be used for file processing (+ Amazon S3), stream processing (+Amazon Kinesis), and IoT/Mobile Backends (+API Requests, +AWS Amplify). A Lambda function also runs when needed and you only pay for the compute time consumed.

🔧Methods: Communication and Diagram

I tried making an AWS Architecture Diagram for me and the client to grasp the concept.

🔧Methods: Services To Be Used

Compute

Lambda - update processing

Storage

DynamoDB - inventory data
AWS TimeStream - inventory analysis
AWS SNS - notification system for stock alerts

API Layer

API Gateway - receives requests

Security

Amazon Cognito - API request authentication
Amazon IAM - permissions and access controls for Lambda Functions

Monitoring

Amazon CloudWatch - system activity monitoring and logging.

MISC

Pharmacy's Application - inventory update and info

🔧Methods: Deployment Process

1.) AWS DynamoDB SetUp

Search DynamoDB in the AWS Management Console and create a table.
The table name depends on what the client needs so I'll use the following:

Table Name: "pha_Inventory"
Primary/Partition Key: "idProduct" (String)
Range/Sort Key: "quantity" (Number)

2.) AWS SNS Setup

Look up SNS in the Management Console and create a topic.

Topic Type(1): Standard
Name: "LowStockAlerts"

Write down the ARNs or the Amazon Resource Names of the topic.

3.) Amazon TimeStream Setup

Switch back to the AWS Management Console and look for TimeStream. Create the database needed for the analysis:

Configuration: Standard
Name: "pha_Analytics"

Create a table within the database:

Name: "pha_InventoryLevels"
Components: Time, Dimensions, Measures

4.) AWS Cognito Setup

This includes setting up Cognito requires creating a user pool(stores user profile information), an app client (says what certain services/apps will interact with the user pool) , and initial users(the ones who'll use the system).

4.a.) User Pool

Create a user pool in AWS Cognito:

Sign In Attribute: Email
User Pool Name: Inventory System Users

4.b.) App Client

Within the User Pool, add an app client.

App Client Name: "InventoryUpdateClient"

4.c.) Initial Users

In the User Pool again, create a user.

This includes placing the chosen user's email for access (pharmacist/pharmacy staff).

5.) IAM Role Config.

From the Management Console, click the IAM Service and create a role. You'd have to choose AWS Lambda as a trusted entity and check the following policies:

AWSLambdaBasicExecutionRole [minimal permissions, write + execute logs]
AmazonDynamDBFullAccess [full access]
AmazonSNSFullAccess [full access]
AmazonTimestreamFullAccess [full access]

6.) Lambda Function

Place the JavaScript Code found in this Github Repository and update the ARNS (Amazon Resource Names) with the ones noted down.

Author from Scratch
Name: "InventoryUpdateFunction"
Runtime: Node.js (22.x)
Specific Role: "LambdaInventoryUpdateRole" (IAM Role)

7. DynamoDB Trigger Setup

This part includes adding an event trigger found in the Repository. Open AWS the Lambda Console and go to functions overview. You'll see the "Add Trigger" dropdown and then choose the DynamoDB Option. Select the DynamoDB Table "pha_Inventory" and adjust the Batch Size accordingly. The starting position should be "Latest" and then enable the trigger.

Here's a snap of what the code looks like:

*Note: Access Restrictions ;)

📄Results: Testing

The (hypothetical) setup is finished for a Simple Pharmacy Inventory System!

Modify products in the DynamoDB Console and check if the stock alerts are sent to the AWS SNS Topic. Also, look into the CloudWatch Logs for the Lambda Triggers and the TimeStream Database for inventory updates.

💭Final Thoughts

🤯 Hoping I'll improve more the next time I do this.

Important Links:
GitHub Repo

Clicking Links and Reaching the S̶k̶y̶ Cloud

Justine Mae Macario — Mon, 16 Dec 2024 15:35:02 +0000

I hadn't planned on starting AWS in 2024. My first-year self would have found this a daunting challenge. But after joining PCS9 and making it to the finals, I wanted to maintain my momentum.

Balancing extra activities, academics, and seeking opportunities was tough. I volunteered for events at my university, including GDG Baguio. I also attended any tech-related event I could find on social media.

During a lull at a registration booth, I opened Facebook to update my friends. I'd seen the AWS Cloud Group before but hadn't paid much attention. Then, I saw the certification exam registration. Having previously attempted to learn Azure, I figured it might be a helpful stepping stone.

I registered, knowing my limited experience in the tech field.

Then, I received an unexpected email. It started with "Congratulations! You are..." and I knew something incredible had happened. The club had chosen me as one of their mentees.

All that hard work had paid off, and you're probably just one click away from your success.

DEV Community: Justine Mae Macario

Short post test

Short Post Test

Inventory Management with AWS Lambda λ

📚Background: Checking and Restocking Process

📚Background: On AWS' Lambda Features

🔧Methods: Communication and Diagram

🔧Methods: Services To Be Used

🔧Methods: Deployment Process

📄Results: Testing

💭Final Thoughts

Clicking Links and Reaching the S̶k̶y̶ Cloud