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Read: 38 - Notifications

Notification

Amazon Simple Notification Service

Fully managed pub/sub messaging, SMS, email, and mobile push notifications.
Is a fully managed messaging service for both application-to-application (A2A) and application-to-person (A2P) communication.
The A2A pub/sub functionality provides topics for high-throughput, push-based, many-to-many messaging between distributed systems, microservice, and event-driven serverless applications.
Using Amazon SNS topics, your publisher systems can fan out messages to a large number of subscriber systems including Amazon SQS queues, AWS Lambda functions and HTTPS endpoints, for parallel processing, and Amazon Kinesis Data Firehose.
The A2P functionality enables you to send messages to users at scale via SMS, mobile push, and email.

Benefits

Modernize and decouple your applications.
Send messages directly to millions of users.
Reliably deliver messages.
Automatically scale your workload.
Ensure accuracy with message ordering and de duplication.
Simplify your architecture with Message Filtering.

Prerequisites

Step 1: Create a topic

Step 2: Create a subscription to the topic

Step 3: Publish a message to the topic

Step 4: Delete the subscription and topic

how it works

you first have to create a topic, which is an access point for subscribers interested in receiving notifications about a specific subject. When a message is published to a topic, Amazon SNS pushes the message to all appropriate subscribers, which could be HTTP endpoints, Amazon SQS queues, or AWS Lambda functions.

VPC

Amazon Virtual Private Cloud (VPC) is a virtual network that closely resembles a traditional network that you’d operate in your own data center.

Amazon VPC lets you provision a logically isolated section of the AWS Cloud where you can launch AWS resources in a virtual network that you define.

messages privately

Some common cases for private networking and messaging include:

Isolating development and testing environments
Sharing personally identifiable information (PII) about your customers
Hosting a PCI-compliant e-commerce website
Developing healthcare applications subject to HIPAA
Implementing a cryptographic algorithm subject to FIPS 140
Processing mortgage applications in a banking system

Publish a message to the topic

In the left navigation pane, choose Topics.
On the Topics page, choose the topic that you created earlier, and then choose Publish message.
The console opens the Publish message to topic page.
(Optional) In the Message details section, enter a Subject, such as: Hello from Amazon SNS!
In the Message body section, choose Identical payload for all delivery protocols, and then enter a message body, such as: Publishing a message to an SNS topic.
Choose Publish message.
The message is published to the topic, and the console opens the topic’s Details page.
Check your email inbox and verify that you received an email from Amazon SNS with the published message.