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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Domain Name Search Tool

Create your own news feed with our RSS News Feed Builder. Use your favorite news source's RSS Feed Url to add your feed. Our RSS Feed Builder catalogs your feeds and saves the content over time.

RSS News Feeds

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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AddAdd the following to the resources section of your Serverless file:

Create a AWS SNS Topic  with your Serverless YAML file. AWS SNS Topics are used to deliver events throughout the AWS environment and to external systems.

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.

Comments are exactly what they sound like. Comments are added to lines of code and/or throughout functionality in the codebase as annotations and are ignored by the interpreter when building. Since comments are ignored, they serve an informational purpose for the contributors of a project and have no effect on the code’s functionality.

Comments are commonly used to help described what a piece of code is doing so that other contributors working in the codebase can easily digest what they’re looking at. Comments are also used to designate the need for future work within a codebase, typically with the ‘TODO:’ placed before the comment itself.

There are multiple ways to comment a file, but for now let’s go through two ways to add comments to your Node.js code.

The easiest way to add a comment to your code is to prefix your comment with two back slashes (“//”). You can add the two slashes at the start of a line and type your comment as well as appending your comment to a specific line by adding the back slashes and comment inline with the thing you’re describing.

Block comments are typically used when the commentor needs to specify a lot of information in a single comment. Block comments are created by starting your comment with ‘/', typing your comment across multiple lines, and ending your comment with '/’. Block comments are also benficial when the commentor needs to specify a list of items such as TODOs.

It's import for software developers to be able to leave comments in their source code. Comments help other contributors understand the code as well as highlight important sections.

How to Add Comments in Node.js

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

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

Serverless template to reference other Cloudformation Stack Output Variables. Use external Cloudformation Stack Variables from other Stacks.

Serverless AWS Reference Other Cloudformation Stack Variables

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