Install JDK on macOS

-

Comments

Post a Comment

Popular posts from this blog

Spinnaker Authentication with Keycloak

-
Image
Spinnaker Authentication with Keycloak In my previous  story  I explained how I deployed Spinnaker onto Kubernetes and enabled public access via ingress. In this short story I’m going to explain how I secure Spinnaker by enabling authentication with Keycloak. For this demo I used Kubernetes running on my Mac and also I’m not going to explain OAuth 2.0, OpenID Connect, all the features of Keycloak. Keycloak Keycloak is an Open Source software for Identity and Access Management. It is developed on the top of  Wildfly   server. It provides support for standard protocols like OpenID Connect, OAuth 2.0, and SAML. Authentication Spinnaker authentication involves three main components. They are, Deck  : Sinnaker UI. That is what you see when you access spinnaker. Gate : API gateway for Spinnaker. All the requests go through the Gate and check whether the request is coming from authenticated user. Identity Provider:  In our case th...
Read more

Four Event Driven Patterns

-
Image
In this story I would like to explain my understanding of the Event Driven Architecture(EDA) and its patterns. I was assigned to introduce the CQRS pattern in my previous company. That is how I got to know about EDA. EDA comes with a lot of concepts like  Events, Commands, Event sourcing, Aggreate, Evet Reaplay  etc.. . I’ll briefly explain what EDA is and what common patterns are. Event Driven Architecture(EDA) EDA is producing, captureing , processing and persisting of Events . The concept of the EDA is not new. When we talk about EDA, we can identify two types of objects, those are  Event  and  Command.  We cannot do a proper implementation without knowing these two. Command Command is a request to a system to do something and sometimes expects a response for that. Command is very specific and it has a known destination. That means we know what is going to process and who is going to execute our command. Let’s take an Ordering...
Read more

Docker sizing Java application

-
Image
Many developers put java in docker yet they face many issues from development to running containers. Docker sizing Java application As  a Java developer, I faced many issues when dockerizing and running java applications. Running dockrized java application When we start our development we used java 8 as our runtime environment. We ran jars as separate processes (yes using java -jar ) in VM, at that time there was no requirement to dockerize applications and everything worked without any major issues. Later we experienced the need for dockerizing applications. Then we faced many performance issues. Our initial docker environment was just docker containers running in a VM without any container orchestration. When we compared dockerized application with normal java application, the performance of dockerized application was not good. When we set the memory limits for docker application, most of the applications threw  java.lang.OutOfMemoryError: Java heap space .  ...
Read more