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About Bikram Kundu

I am a Software Craftsman, with slightly more admiration towards design and architecture. Among the few and far developers with proficiency in Java & JavaScript. I am equally in love with SkillIQ and RoleIQ.

Classpath Scanning using @ComponentScan and Filters

Introduction: A Classpath scanning basically means, detecting the classes that need to be managed by the Spring under a specified package. You need to make use of the spring @ComponentScan annotation with the @Configuration for classpath scanning. This annotation allows you to specify a base package and also a filter if needed to fine control the package scanning. We will [...]

By |2020-04-04T17:44:03+00:00April 4th, 2020|Categories: Spring Framework|Tags: |

Managed beans using @Component, @Repository, @Service

Introduction: In this tutorial, you will learn the different Spring stereotype annotations (@Component, @Repository and @Service) to declare any class as a Spring-managed Bean. Spring MVC also has several other annotations like @Controller and @RestController. The classes that are managed as beans in Spring are known as Managed Components. There are basically few stereotype annotations in spring that declare classes [...]

By |2020-04-03T18:42:22+00:00April 3rd, 2020|Categories: Java™, Spring Framework|Tags: |

Top Youtube Channels for every Java Developer

Everyone today wants to stay up to date in this ultra speed world, especially when it comes to programming knowledge. There were times when a Java developer could survive without much updating themself for years, but those days are gone. Today technology is evolving very fast, we need to sharpen our programming skills to stay relevant with the latest and [...]

By |2020-04-01T12:32:59+00:00April 1st, 2020|Categories: Java™|Tags: |

RabbitMQ with Spring AMQP and Spring Boot

In this tutorial, we will explore the use of Spring AMQP to communicate with the RabbitMQ messaging middleware. All the previous article code examples are based on the RabbitMQ-Java-Client library. Spring AMQP also makes use of the same library, however, it provides a practical oriented approach to communicate with RabbitMQ. If you are already familiar with Spring stack, then you [...]

By |2020-03-31T06:45:00+00:00March 31st, 2020|Categories: RabbitMQ, Spring Framework|Tags: , |

Complete RabbitMQ Tutorial in Java

Complete RabbitMQ Tutorial in Java with Spring Boot example This is a RabbitMQ Course in Java with asynchronous messaging examples using rabbitmq-java-client, Spring Boot and Spring AMQP. This is a programming course, it focuses more on the asynchronous programming than the admin UI. I have tried to keep the tutorial up-to-date with the latest Java trends. Code Examples [...]

By |2020-04-03T14:23:10+00:00March 28th, 2020|Categories: Java™, RabbitMQ|Tags: , |

Alternate Exchange to collect the rejected messages in RabbitMQ

You will learn to collect rejected messages in RabbitMQ. There can be several reasons to do that, for example, to track down the spammers in an Open CRM system. We will learn this with an example of a Topic Exchange, please check the previous article on Topic Exchange if you are new to RabbitMQ. What is Alternate Exchange? There will [...]

By |2020-03-27T13:05:44+00:00March 27th, 2020|Categories: RabbitMQ|Tags: |

Exchange to Exchange binding in RabbitMQ

It is possible to bind an Exchange to another Exchange just like Exchanges to Queues bindings. An exchange can be bound with another exchange with the source routing rules. The destination exchange finally routes the messages to the Queues bound to it. We will take 2 Exchanges as an example, home-direct-exchange as source and linked-direct-exchange as the destination exchange. The [...]

By |2020-03-29T15:53:54+00:00March 26th, 2020|Categories: RabbitMQ|Tags: |

Default Exchange in AMQP – RabbitMQ

Default Exchange in RabbitMQ is not a special type of Exchange in RabbitMQ like Direct Exchange or Topic Exchange. It is a special Direct Exchange with an empty name. In the Elements of AMQP article, you have sent a message directly to a Queue using the empty Exchange name. This is where Default Exchange comes to play. The below image [...]

By |2020-03-25T13:56:57+00:00March 25th, 2020|Categories: RabbitMQ|Tags: |

Headers Exchange in AMQP – RabbitMQ

Headers Exchange Type is the most powerful exchange type in AMQP (RabbitMQ). Headers exchanges route a message based on the message headers matching, they ignore routing keys. The diagram here represents 3 Queues (HealthQ, SportsQ, and EducationQ) are bound to the Headers Exchange (my-headers-exchange) with JSON like headers. We will discuss each of these headers below in detail. The flow [...]

By |2020-03-25T08:43:28+00:00March 25th, 2020|Categories: RabbitMQ|Tags: , |

Topic Exchange in AMQP – RabbitMQ

This article focuses on the Topic Exchange type (amq.topic) in RabbitMQ. You will learn to bind a Queue with a Topic Exchange using a routing key pattern. You have already learned about Exchanges and Queues in the Elements of RabbitMQ. The diagram here explains a producer sends a message to my-topic-exchange , there are 3 Queues bound to this exchange [...]

By |2020-03-23T16:58:55+00:00March 23rd, 2020|Categories: RabbitMQ|Tags: , |