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This tutorial is about spring cloud Netflix Eureka. Here, we will be creating eureka discovery server and microservices that will itself register to the discovery server and the client that will use netflix client API to discover the service and consume the microservices exposed by the service with sample example.Hence, we will be developing 3 different spring boot application for ...

AES stands for Advanced Encryption System and it’s a symmetric encryption algorithm.Many times we require to encrypt some plain-text such as password at the client side and send it to server and then server decrypts it to process further.AES encryption and decryption is easier to implement in the same platform such as Android client and Java server but sometimes it ...

I recently upgraded a Neo4j backed application from Neo4j 3.2 to Neo4j 3.3 and came across an interesting change in behaviour around type coercion which led to my application throwing a bunch of errors. In Neo4j 3.2 and earlier if you added a String to a Double it would coerce the Double to a String and concatenate the values. The ...

Welcome to angular5 jwt authentication with spring security.In this tutorial, we will be creating a full stack app using jwt authentication in an angular5 single page application having backened server supported by spring boot with integration of spring security.Having said that we will have a sample angular5 example application with HttpInterceptor integrated with it to intercept all the HTTP request ...

Fluent interface, first coined as a term by Martin Fowler, is a very convenient way of communicating with objects in OOP. It makes their facades easier to use and understand. However, it ruins their internal design, making them more difficult to maintain. A few words were said about that by Marco Pivetta in his blog post Fluent Interfaces are Evil; ...

We’re all guilty of logging malpractice. Don’t think so? These statistics might change your mind We won’t sit here and ask you questions with obvious answers like, do you use log files to monitor your application in production? We all use logs, and there can be useful information stored there if you know how to find it. But, logs are ...

1. What is EGit ? GIT is a popular versioning system used widely across the software development sector. Despite being a popular versioning system, it isn’t really easy to work with when it comes to using the command line interface for versioning. To solve this difficulty, the developers came up with creative GUI based tools called the GIT clients. GIT ...

In most enterprise environments some form of secure communication (e.g. TLS or SSL) is used in connections between applications. In some environments mutual (two-way) authentication is also a non-functional requirement. This is sometimes referred to as two-way SSL or mutual TLS authentication. So as well as the server presenting it’s certificate, it requests that the client send it’s certificate so ...

The object keyword in Kotlin creates singleton in a very convenient way. It can be used for example as a state of an operation. Spock Framework is one of the most expressive and readable test framework available in the Java ecosystem. Let’s see how Kotlin object can be used in the Spock tests. What do we want to test? We ...