How to Publish Messages to Amazon SNS | Overview.

How to Publish Messages to Amazon SNS - Overview.

Scope:

• Intro,
• Methods to Publish Messages to Amazon SNS,
• Using AWS Console,
• Using AWS CLI,
• Using Python (Boto3),
• Using Node.js (AWS SDK),
• Insights.

 Methods to Publish Messages to Amazon SNS

•        The AWS Management Console (UI)
•        AWS CLI,
•         Programming SDK(softeware development kit) like Python (Boto3), Node.js, & many more.

1. Using AWS Console

1.     Go to the Amazon SNS Console

2.     Click "Topics", then select or create a topic.

3.     Choose "Publish message".

4.     Fill out:

•    Subject (optional)
•    Message body
•    Choose message format (JSON, raw text, etc.)

5.     Click "Publish message"

2. Using AWS CLI

• First, make sure twtech CLI is configured with AWS credentials:

# bash
aws configure
Then publish a message like this:
# bash
aws sns publish \
  --topic-arn "arn:aws:sns:us-east-2:accoundID:twtechSNS-Topic" \
  --message "Hello From twtech SNS Team via AWS CLI"
To send to a phone number (SMS):
 # bash
aws sns publish \
  --phone-number "+1555123xxxx" \
  --message "This is an SMS message From twtech SNS Team via CLI"
 3. Using Python (Boto3)
# Install Boto3:
# bash
pip install boto3
# Then use this code:
# python
import boto3
# Create an SNS client
sns = boto3.client('sns')
# Publish a message to a topic
response = sns.publish(
    TopicArn='arn:aws:sns:us-east-2:accountID:twtechSNS-Topic',
    Message='Hello from twtech SNS Team via Boto3 CLI',
    Subject='Test Notification'
) 
print("Message ID:", response['MessageId'])
To send to an SMS number instead:
# python
response = sns.publish(
    PhoneNumber='+155512xxxx',
    Message='This is an SMS message from twtech SNS Team via python CLI'
)
4. Using Node.js (AWS SDK)
# bash
npm install aws-sdk
# js
const AWS = require('aws-sdk');
AWS.config.update({ region: 'us-east-2' });
const sns = new AWS.SNS();
const params = {
  Message: 'Hello from twtech SNS Team via Node.js CLI',
  TopicArn: 'arn:aws:sns:us-east-2:accoundID:twtechSNS-Topic'
}; 
sns.publish(params, function(err, data) {
  if (err) console.error(err, err.stack);
  else     console.log('Message ID:', data.MessageId);
Insights
Steps to Directly Publish a message to mobile apps SDK:
twtech starts by creating a platform for the application, 
Next, it creates a platform for the endpoint,
Then, it publishes message to the platform endpoint. 
This works seamlessly for applications like:  Google GCM, Apple APNS, Amazon  Device Messaging(ADM).