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This tutorial is explained in the below Youtube Video.
In a previous tutorial, we implemented a Spring Boot + RabbitMQ example to understand the various exchange types. In this tutorial, we will be implementing a Spring Boot + RabbitMQ example to retry messages on exception. If the exception still exists after maximum retries, then we put a message in a dead letter queue where it can be analyzed and corrected later.
In English vocabulary, dead letter mail is undeliverable mail that cannot be delivered to the addressee. A dead-letter queue (DLQ), sometimes known as an undelivered-message queue, is a holding queue for messages that cannot be delivered to their destinations due to something.
According to Wikipedia — In message queueing the dead letter queue is a service implementation to store messages that meet one or more of the following failure criteria:
In this tutorial, we will be selecting an image using Angular 8 UI. This image will then be sent to the Spring Boot backend by making a REST call. Later this image will be stored in a MySQL database. We will also later retrieve the saved image and display it using Angular.
This tutorial is explained in the below Youtube Video.
In my previous tutorial, Spring Boot Transaction Management Example, we looked at transactions and implemented declarative transaction management. In this tutorial, we look at propagation and its different types. In the next tutorial, we will be looking at Spring Boot Transaction Rollback and Spring Boot Transaction Isolation.
Any application involves a number of services or components making a call to other services or components. Transaction propagation indicates if any component or service will or will not participate in a transaction and how will it behave if the calling component/service already has or does not have a transaction created already.