Microservices are a software engineering and architecture methodology in which the software is composed of de-coupled componentized services that communicate via well-defined interfaces over an API.

What are Microservices?

The correct JSON content type: The MIME media type for JSON text is application/json. The default encoding is UTF-8.

What's the correct JSON content type?

The best Javascript based DateTime library. Luxon DateTime is Javascript based and includes DateTimes, Durations, and Intervals.

Install Luxon DateTime Node Library

Create SQS Queue that received messages from SNS Topics through Subscribing your SQS Queue to the SNS Topic with an SQS Queue Policy. Bonus: Included is an AWS Lambda Function that is triggered by the SQS Queue.

Serverless AWS SQS Queue Subscribed To SNS Topic

Setup ES Build for your Serverless Project. Build your Serverless Lambda Functions using ES Build for smaller packaged services and quicker builds.

Serverless AWS Lambda Function ES Build Setup

Example of getting data from S3 and a stream function to read the data into a useable format.

Read Data From AWS S3 With Nodejs

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A K-Sortable Unique IDentifier (KSUID), is an alternative uniquely generated identifier from the GUID, UUID, and ULID. KSUIDs are generated with the goal of being loosely sorted by generation time.

KSUID Generator

QR codes are a type of barcode. QR Code contain various forms of information encoded in the pattern. Information encoded in a QR Code's pattern can include website urls, links, account information, phone numbers, or even coupons. Any information typed into the input will be encoded into the QR Code.

QR Code Generator

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The following configuration setup is for a HASH - RANGE primary index with a Global Secondary Index called 'date-index' that allows data to be queried by a date with a format of 'YYYY-mm-DD'.

Add the following to the resources section of your Serverless YAML file:

Create a DynamoDB Table with your Serverless YAML file. DynamoDB Table with a Time to Live (TTL) attribute and a Global Secondary Index (GSI) to query efficiently by dates.

Microservices architectures allow applications to scale, grow, pivot, and innovate much more efficiently than other architectures.

What’s the difference: Monolithic v Microservices

Monolithic architectures typically indicate that all processes are tightly coupled and can only run as a single service and usually on that same server. Expanding the codebase and product offering becomes increasingly complicated dues to the inter woven functionality. Monolithic applications need to have an indepth infrastructure monitoring &amp; maintenance and DevOps plans in place to keep access and performance stable and the application grows.

Microservices architecture designs allow an application to be built with independent components that run each application process individually as its own service. Services communicate via a well-defined interface through a, typically internal, API layer. Microservice services are built for business capabilities by taking into account the needed business logic and each service performs an individual function or logically grouped functionalities. Since they are independently run, services can be individually updated, deployed, reverted, and scaled to meet current and future demand of an application.

Add the following to your YAML Serverless Template:

The sample uses a "filterPatterns" key to only process 'MODIFY' stream events. The three lifecycle stream events are "INSERT", "MODIFY", "REMOVE".

Configure AWS DynamoDB Streams to trigger an AWS Lambda Function. Include a filter pattern to only trigger on Modify events.

Serverless AWS DynamoDB Stream to Lamba Function

Add the following YAML to the resources section of your Serverless file.

Serverless template to create a SQS queue and SQS DLQ in AWS. The SQS queues reference each other and errored events will be sent to the SQS DLQ.

Serverless AWS Create SQS Queue Template

<a href="https://aws.amazon.com/timestream/">https://aws.amazon.com/timestream/</a>

Create an AWS Timestream Database and Table in your Serverless YAML file. AWS Timestream is for IoT events and any data that needs to be tied to a specific point in time.

Serverless AWS Create Timestream Database and Table

A Universally unique Lexicographically sortable IDentifier (ULID), is an alternative uniquely generated identifier from the GUID, UUID, and KSUID. ULIDs are 128-bit text strings generated with 48 bits dependent with the current timestamp in milliseconds and 80 bits generate through randomness.