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Configure JBoss / Wildfly Datasource with Maven

Most Java EE applications use database access in their business logic, so developers are often faced with the need to configure drivers and database connection properties in the application ...
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WebSocket Chat on WildFly and OpenShift

Chat is one of the most canonical sample to explain WebSocket. Its a fairly commonly used interface and allows to explain the fundamental WebSocket concepts very easily. Of course, ...
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Securing WebSocket using wss and HTTPS/TLS

50th tip on this blog, yaay! Tech Tip #49 explained how to secure WebSockets using username/password and Servlet Security mechanisms. This Tech Tip will explain how to secure WebSockets ...
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The JAXB Well Known Secret

Introduction I rediscovered a library that Java offers to the masses. When I first read the specification, I was confused and thought I needed all these special tools to implement. ...
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Write SQL in Java with jOOQ

jOOQ is a “database first”, type safe SQL API that allows you to write SQL in Java intuitively as if the SQL language were supported natively by the Java compiler. All database ...
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Custom Reason Phrase in HTTP status error message response with JAX-RS (Jersey)

In some of my recent work I got the request to produce a custom Reason Phrase in the  HTTP status response delivered to one of our REST API consuming clients when an error occurs. ...
java-interview-questions-answers

User sessions, Data controls and AM pooling

Recently I was asked an interesting question about application module pooling. As we know AM pool contains application module instances referenced by user sessions, which allows a session ...
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Spring Rest API with Swagger – Creating documentation

The real key to making your REST API easy to use is good documentation. But even if your documentation is done well, you need to set your company processes right to publish it correctly ...
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Spring Boot Actuator: custom endpoint with MVC layer on top of it

Spring Boot Actuator endpoints allow you to monitor and interact with your application. Spring Boot includes a number of built-in endpoints and you can also add your own.   Adding ...
java-interview-questions-answers

Securing WebSockets using Username/Password and Servlet Security

RFC 6455 provide a complete list of security considerations for WebSockets. Some of them are baked in the protocol itself, and others need more explanation on how they can be achieved ...
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