In this tutorial you will learn how to write a JUnit Test that validates if method under the test throws correct exception. This tutorial will have examples for JUnit 5 and JUnit 4 as well. Let’s begin with JUnit 5 version first. JUnit 5. “assertThrows()” Assertion To test for exception in JUnit 5 we use…
Read More Test for Exception in JUnit 5 and JUnit 4In this article, we will cover the basics of Aspect-Oriented Programming (AOP). You will learn how to use AspectJ to provide different AOP advices to Spring Boot applications to support cross-cutting issues like logging, profiling, caching, and transaction management and finally we will do a practical implementation to record user operations using Spring Boot AOP.…
Read More A guide to Spring Boot AOP to Record User OperationsIn this tutorial, you will learn how to read data from Dynamo DB using the AWS Lambda function. This tutorial mainly talks about scan and query operations on a DynamoDB table. First, let’s have a quick overview of the DynamoDB table. DynamoDB Table Amazon DynamoDB is a fully managed NoSQL database service that provides fast…
Read More Read Data from DynamoDB using AWS Lambda functionIn this tutorial, you will learn about JUnit5 Lifecycle methods. A Lifecycle Method is any method that is directly annotated or meta-annotated with @BeforeAll, @AfterAll, @BeforeEach, or @AfterEach. Let’s have a look at these annotations one by one. @BeforeAll When a method is annotated with @BeforeAll it means that the method should be executed before…
Read More A Guide to JUnit5 Lifecycle MethodsIn this tutorial, you will learn how to use the @ResponseBody annotation to return JSON in the HTTP response body. You might also be interested to learn how to Read JSON Request Body in the Spring MVC Web application. @ResponseBody Annotation To make a method in the Controller class return JSON in HTTP Response body…
Read More Spring Web MVC – Return JSON in Response BodyIn this tutorial, you will learn about Unit Testing AWS Lambda Function with Java. First, we will have a quick overview of Unit Testing. Then we will look at the required dependencies in order to do Unit Testing of AWS Lambda Function. After that, we will dive deep into the annotations that will be used…
Read More Unit Testing AWS Lambda Function with JavaIn previous, video tutorials I have shared with you how to read Request Path parameters, Query String parameters and Form data. In this tutorial, you will learn how to make a method in the Controller class read JSON body from HTTP request. To read the body of HTTP request, we will use the @RequestBody annotation…
Read More Read JSON Request Body in Spring Web MVCIn this tutorial, you will learn how to read form data in your Spring MVC web application. To read form data in a method of the Controller class you can use the @ModelAttribute annotation. HTML Form Below is an example of an HTML form that submits form data to a /users URI path as an…
Read More Read Form Data in Spring Web MVC with @ModelAttributeIn this lesson, you will learn how to read URL query string parameters in your Spring MVC web application. @RequestParam annotation Let’s assume that we need to create a method that needs to return a list but is limited to a certain number. To make our method read URL Query String Parameters, we will…
Read More Spring Web MVC – Reading URL Query String ParametersIn this tutorial, you will learn how to read URI path variables in your Spring MVC Web application. Define Path Variable To define the path variable in the URI path, we use curly brackets. The @GetMapping annotation below specifies one path variable called userId. Notice that userId is surrounded by curly brackets. @GetMapping(path=”/users/{userId}”) @PathVariable Annotation…
Read More Spring Web MVC – Reading URI Path VariablesIn this tutorial, you will learn how to pass information from your Controller class to the View using the Spring MVC ModelAndView object. In previous lessons, we discussed how to use Model and ModelMap for the same purpose – to pass properties from Controller to the View. The ModelAndView class, you will also use to pass…
Read More Spring Web MVC – The ModelAndView ObjectIn this tutorial, you will learn how to pass information from your Controller class to the View using the Spring MVC ModelMap object. To make ModelMap object available to your controller, you will simply inject it as an argument to your method. Just the same way as we have injected, the Model object in the…
Read More Spring Web MVC – The ModelMap ObjectIn this guide, you will learn to use @RepeatedTest and @ParametrizedTest annotations introduced in JUnit 5. We’ll look at the capability that lets us run a test a certain number of times. We’ll also look at interfaces that will allow us to retrieve information about the repeated tests. Moreover, we will also look at a…
Read More A Guide to @RepeatedTest and @ParametrizedTest in JUnit 5In this tutorial, you will learn how to pass information from your Controller class to the View using the Spring MVC Model object. A Model is an object that you can use to pass attributes from the Controller to the View. To make the Model object available to a method in your controller class, you…
Read More Spring Web MVC – The Model ObjectIn this tutorial, you will learn to configure your Spring Boot Web MVC application support Thymeleaf templates. Thymeleaf Maven Dependency To make your Spring Boot Web MVC application support Thymeleaf templates, you will need to add one additional dependency to the pom.xml file. <!– https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-thymeleaf –> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> Templates Folder In the Spring…
Read More Spring Web MVC – Configure Thymeleaf Support