Introduction to Docker

https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-16-04 Install docker and check status sudo docker --version .Install Docker UI , it would be easy to manage docker containers, images, IP, portLearn basic commands of docker like sudo docker ps will list out running processes( containers) refer this more https://docs.docker.com/reference/When you run an image a container start with alpine version of linux by … Continue reading Introduction to Docker →

Introduction to Rabbit MQ

Rabbit MQ Messages are not published directly to a queue, instead, the producer sends messages to an exchange. An exchange is responsible for the routing of the messages to the different queues. An exchange accepts messages from the producer application and routes them to message queues with the help of bindings and routing keys. A … Continue reading Introduction to Rabbit MQ →

Journey of Monolithic code to independent services

Journey of Monolithic to Independent Services Problem Statement: We were maintaining 4 separate Branch , 3 instances [Version Management, Project RM, Process RM] Version Management code : Running separate instance , 5081 lines of code in single class Project Release Management : Running separate instance , 4731 lines of code in single class Process Release Management: Running separate instance , 4684 lines of code in single class Solution … Continue reading Journey of Monolithic code to independent services →

JPA and Hibernate mappings

1. Hibernate one to one , one to many and many to many mappings in effective way https://vladmihalcea.com/the-best-way-to-use-the-manytomany-annotation-with-jpa-and-hibernate/ https://vladmihalcea.com/the-best-way-to-map-a-onetoone-relationship-with-jpa-and-hibernate/ https://vladmihalcea.com/the-best-way-to-map-a-onetomany-association-with-jpa-and-hibernate/ Some of the hibernate and JPA property spring.h2.console.enabled=true - to enable h2 in memory database spring.jpa.show-sql=true - to see all the query in logs spring.jpa.properties.hibernate.format_sql=true - to see all sql in proper format logging.level.org.hibernate.type=trace

Java 8 features, Collections

Java ArrayList Class - Java ArrayList class can contain duplicate elements.Java ArrayList class maintains insertion order.Java ArrayList class is non synchronized.Java ArrayList allows random access because array works at the index basis.In Java ArrayList class, manipulation is slow because a lot of shifting needs to occur if any element is removed from the array list. … Continue reading Java 8 features, Collections →