To work with Apache Kafka, you need to understand some basic concepts about: Producer Consumer Broker Cluster Topic Topic Partitions Partition Offset Consumer Group Producer Producers are applications that produce data and send data to Apache Kafka Server. This data will be formatted messages, sent… Read More
Google Pub/Sub is one of the cloud messaging services that we can use if your application has features that require using messaging technology. In this article, I will show you how to publish a message to Google Pub/Sub topic using the Pub/Sub Java client library!… Read More
To create a new topic in Google Pub/Sub, go to https://console.cloud.google.com/cloudpubsub/, then click the Create Topic button to create a new topic! The following window will be displayed: Topic ID is the name of the topic you want to create. Here, we also have 4… Read More
In the tutorial Overview about Spring Data JPA, I introduced you to Spring Data JPA and how to configure it using XML files. There is another way to configure Spring Data JPA which is to use the annotations it supports such as the @EnableJpaRepositories annotation.… Read More
After defining API specs with RAML, we can use Spring MVC-RAML Maven plugin to generate API contract. With API specs using OpenAPI Specification, you can use OpenAPI Generator Maven plugin to do this. How is it in detail? We will find out together in this… Read More
I showed you how to define RESTful Web Service API specs using RAML. Another way to do this is to use the OpenAPI Specification. How is it in detail? In this tutorial, we will learn together how to define RESTful Web Service API specs using… Read More
With the desire to give you a complete guide on building an Authorization Server using Spring Authorization Server, I took the time to write the book “Spring Authorization Server – From the basics – Second Edition”. You can buy this book here: This book covers… Read More
After defining API specs with RAML, we will proceed to implement this API specs. If your application is using the Spring framework then you can use Spring MVC-RAML Plugin to generate API contract with Spring framework and just add implementation code. How is it in… Read More
Trait in RAML is used to define the same elements in different request URIs so that they can be reused. It’s like common class, common method in Java! For example, I have 2 request URIs with the following definitions:
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#%RAML 1.0 baseUri: https://localhost:8081/api title: RAML Trait version: 1.0 /students/by-name: get: queryParameters: name: string /classes/by-name: get: queryParameters: name: string |
In these two requests, the… Read More
After defining API specs using RAML file, we can generate code to implement these APIs using Spring framework and also import it into Postman for testing. In this tutorial, I will show you how to import RAML into Postman! I will use the API specs… Read More
