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Running Java Applications
Running Java App In order to run your Java Applications you must first compile all of the source...
All About Importing Modules and from Packages
Module? A module is just a Python file with the corresponding .py extension. So if you're talkin...
Remove all untracked files
To remove all unwanted un-tracked files you can just run: git clean Use it with -n for a dry ru...
Parent and Child pom.xml
https://howtodoinjava.com/maven/maven-parent-child-pom-example/
Maven Intro
What is Maven Maven is a build automation tool. Think of it as a Makefile but instead of you wri...
What the heck are @Annotations?
Annotation They are metadata that you can write into your Java program. They don't affect the ex...
All About Branches
Branch name inconsistency Sometimes the branch name shown in git are inconsistent. For example,...
Why Sometimes git checkout fails
Did you ever wonder why when you run git checkout <branch name> from say a feature branch to the ...
Executing Binary/Script
If binary is relative to your current directory If the binary/script is relative to your current...
Some Random Services
CloudFormation Declarative way for outlining your AWS infrastructure using a template. "I want ...
Disaster Recovery and Migration
Disaster recovery Disaster recovery is about preparing for those disaster that can happen to the...
SQS, SNS, Kinesis, Active MQ
Decoupling mechanism When we deploy multiple applications they will inevitably need to communica...
Even More Architecture Discussion
Event processing in AWS SQS + Lambda Lambda service is going to poll from SQS, however, there c...
Serverless, Lambdas, DynamoDB, Cognito, API Gateway
Lambda function Why is serverless good? Well if you are using EC2 instances then you have to pro...
VPC
Networking 101 IP Addresses Every host or device on a network must be addressable, meaning that...
Route 53
Domain name system It is a lookup server that help you translate domain names to IP addresses. I...
KMS, SSM Parameter Store, Shield, WAF
Encryption 101 Encryption in flight: Achieved via SSL, your connection to the web server is encr...
IAM Advanced
Organization Let you manage multiple AWS account at the same time. There is one main account tha...
AWS Monitoring CloudWatch, CloudTrail, Config
CloudWatch CloudWatch Metrics CloudWatch provides metrics (variable that you want to monitor) f...
Machine Learning
Rekognition A machine learning service to find object, people, text, scenes in images and videos...