Home » Author Archives: Biju Kunjummen (page 3)

Author Archives: Biju Kunjummen

Spring RestTemplate with a linked resource

spring-interview-questions-answers

Spring Data REST is an awesome project that provides mechanisms to expose the resources underlying a Spring Data based repository as REST resources. Exposing a service with a linked resource Consider two simple JPA based entities, Course and Teacher:           @Entity @Table(name = "teachers") public class Teacher { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id") private ...

Read More »

Externalizing session state for a Spring-boot application using spring-session

spring-interview-questions-answers

Spring-session is a very cool new project that aims to provide a simpler way of managing sessions in Java based web applications. One of the features that I explored with spring-session recently was the way it supports externalizing session state without needing to fiddle with the internals of specific web containers like Tomcat or Jetty. To test spring-session I have ...

Read More »

Spring boot war packaging

spring-interview-questions-answers

Spring boot recommends creating an executable jar with an embedded container (tomcat or jetty) during build time and using this executable jar as a standalone process at runtime. It is common however to deploy applications to an external container instead and Spring boot provides packaging the applications as a war specifically for this kind of a need. My focus here ...

Read More »

Spring Caching abstraction and Google Guava Cache

spring-interview-questions-answers

Spring provides a great out of the box support for caching expensive method calls. The caching abstraction is covered in a great detail here. My objective here is to cover one of the newer cache implementations that Spring now provides with 4.0+ version of the framework – using Google Guava Cache In brief, consider a service which has a few ...

Read More »

Docker RabbitMQ cluster

docker-logo

I have been trying to create a Docker based RabbitMQ cluster on and off for sometime and got it working today – fairly basic and flaky but could be a good starting point for others to improve on. This is how the sample cluster looks on my machine, this is a typical cluster described in the RabbitMQ clustering guide available ...

Read More »

Spring @Configuration – RabbitMQ connectivity

rabbitmq-logo

I have been playing around with converting an application that I have to use Spring @Configuration mechanism to configure connectivity to RabbitMQ – originally I had the configuration described using an xml bean definition file. So this was my original configuration:             <beans ...;> <context:property-placeholder/> <rabbit:connection-factory id="rabbitConnectionFactory" username="${rabbit.user}" host="localhost" password="${rabbit.pass}" port="5672"/> <rabbit:template id="amqpTemplate" connection-factory="rabbitConnectionFactory" exchange="rmq.rube.exchange" ...

Read More »

Spring WebApplicationInitializer and ApplicationContextInitializer confusion

spring-interview-questions-answers

These are two concepts that I mix up occasionally – a WebApplicationInitializer and an ApplicationContextInitializer, and wanted to describe each of them to clarify them for myself. I have previously blogged about WebApplicationInitializer here. It is relevant purely in a Servlet 3.0+ spec compliant servlet container and provides a hook to programmatically configure the servlet context. How does this help ...

Read More »
Want to take your Java Skills to the next level?
Grab our programming books for FREE!
  • Save time by leveraging our field-tested solutions to common problems.
  • The books cover a wide range of topics, from JPA and JUnit, to JMeter and Android.
  • Each book comes as a standalone guide (with source code provided), so that you use it as reference.
Last Step ...

Where should we send the free eBooks?

Good Work!
To download the books, please verify your email address by following the instructions found on the email we just sent you.