In this tutorial, you will learn how to retrieve the HTTP header value from an HTTP response while testing your RESTful API using REST Assured. What are HTTP Headers? HTTP headers are a fundamental part of the HTTP protocol, which is the protocol used to transfer data over the web. An HTTP header is a…
Read More Read HTTP Header with REST AssuredIn this short tutorial on REST Assured you will learn how to get the entire HTTP Response Body when testing your RESTful Web Service Endpoint. Web Service Endpoint Response Let’s assume we have the following Web Service Endpoint URL and when HTTP GET request is made to this Web Service Endpoint a JSON representation of…
Read More REST Assured Get HTTP Response BodyIn this tutorial, I will guide you through the process of setting up a Kafka Consumer using the @Configuration class and the @Bean method. This approach offers more flexibility and control compared to using the application.properties file. Kafka consumer configuration can be achieved in two primary ways in a Spring Boot application: Using the application.properties…
Read More Kafka Consumer Configuration in the @Bean MethodIn this tutorial, you will learn how to install MySQL on Amazon EC2 Linux machine. If you’re new to this or have encountered issues with previous installations, you’re in the right place. If you want to learn how to run MySQL in a Docker container instead, then read this tutorial: How to start MySQL in…
Read More How to Install MySQL on Amazon EC2 LinuxIn this tutorial, you will learn how to use TestRestTemplate to get a list of objects. If you are also interested to learn how to send an HTTP POST request, then please have a look at the “TestRestTemplate HTTP Post Example” tutorial. Maven Dependency To use TestRestTemplate in your Spring Boot project, you should have the…
Read More Get List of Objects with TestRestTemplateYou will use @MockBean annotation to create and automatically add mocks to Spring ApplicationContext. In this tutorial, we will look at different ways you can use @MockBean annotation to create mocks. If you are testing your application with JUnit and Mockito, then there are many other useful tutorials you will find on the Testing Java Code…
Read More @MockBean Annotation ExampleIn this tutorial, you will learn how to implement the API Gateway Lambda Authorizer in Java. You will also learn how to make Lambda Authorizer validate Authorization JWT. First, we will create an API using API Gateway then we will make lambda function as an integration point for the GET method of our resource. After…
Read More API Gateway Lambda Authorizer Example in JavaIn this tutorial, we are going to learn that how we can use AWS Lambda to store user data in Amazon RDS. This tutorial is divided into three parts. Creating database using Amazon RDS. Creating Spring Boot Application. Testing Lambda function. We can refer to the following tutorials before going ahead. Build and deploy a…
Read More Using AWS lambda to store user data in Amazon RDSIn the previous blog post, we covered the basics of how to use Keycloak with Spring boot. In this blog post, we will explore Role-based Access Control to Rest API with Keycloak. So let’s get started! Imagine we have a microservice for a Research Journal Management System that can serve users with two types of…
Read More Role-Based Access Control to REST API with KeycloakIn this tutorial, we are going to see how we can use the AWS API Gateway as a trigger to an AWS Lambda function. This tutorial requires you to be familiar with building and deploying Serverless Applications with AWS Lambda. Prerequisite: Build and Deploy a Serverless Spring Boot Web Application with AWS Lambda Firstly, add…
Read More Trigger a Lambda Function Using AWS API GatewayIn this tutorial, you will learn how to get the currently authenticated principal user UserId value from the JWT access token generated by Keycloak. UserId in JWT The userId value will be stored under the “sub” key in the JWT access token generated by Keycloak. Below is an example of a decoded JWT access token containing…
Read More Get UserId from Keycloak JWT Access TokenIn this tutorial, you will learn how to create and run your own Zuul API Gateway and how to register with it more than one Spring Boot Microservice. To be able to follow this tutorial you need to know how to create simple RESTful Web Services with Spring Boot. If you need to review that,…
Read More Zuul API Gateway TutorialIn this blog post I am going to share with you how to handle Exceptions in your RESTFul Web Service API and how to return expected JSON Payload message back to a mobile application if an error takes place in your Java code. For that I am going to use the exception @Provider annotation and…
Read More Exception Handling in a RESTful Web ServiceIn this blog post we will implement Token-base authentication and will learn how to use Access Token we have created in a previous blog post to communicate with Web Service endpoints which require user to be a registered user with our mobile application. If you have not followed the previous two blog posts then it…
Read More Token-based Authentication ExampleIt time to learn how to create a Web Service to authenticate user with their user name and password and how to issue a unique secure access token which our Mobile Application can use to send HTTP requests and communicate with protected web services of our API. For a free video tutorial on how to…
Read More RESTful Web Service to Authenticate User and Issue Access Token