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Run Java EE Tests on Docker using Arquillian Cube


Tech Tip #61 showed how to run Java EE 7 Hands-on Lab using Docker. The Dockerfile used there can be used to create a new image that can deploy any Java EE 7 WAR file to the WildFly instance running in the container. For example can be copied to the root directory of javaee7-samples and be used to deploy jaxrs-client.war file to the container. Of course, ...

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Message Processing with Spring Integration


Spring Integration provides an extension of the Spring framework to support the well-known Enterprise Integration Patterns. It enables lightweight messaging within Spring-based applications and supports integration with external systems. One of the most important goals of Spring Integration is to provide a simple model for building maintainable and testable enterprise integration solutions.             Main Components ...

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Accessing Meetup’s streaming API with RxNetty


This article will touch upon multiple subjects: reactive programming, HTTP, parsing JSON and integrating with social API. All in one use case: we will load and process new events in real time via non-bloking RxNetty library, combining the power of Netty framework and flexibility of RxJava library. Meetup provides publicly available streaming API that pushes every single Meetup registered ...

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Don’t be “Clever”: The Double Curly Braces Anti Pattern


From time to time, I find someone using the double curly braces anti pattern (also called double brace initialisation) in the wild. This time on Stack Overflow: Map source = new HashMap(){{ put("firstName", "John"); put("lastName", "Smith"); put("organizations", new HashMap(){{ put("0", new HashMap(){{ put("id", "1234"); }}); put("abc", new HashMap(){{ put("id", "5678"); }}); }}); }}; In case you do not understand the ...

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Creating a REST API with Spring Boot and MongoDB


Spring Boot is an opinionated framework that simplifies the development of Spring applications. It frees us from the slavery of complex configuration files and helps us to create standalone Spring applications that don’t need an external servlet container. This sounds almost too good to be true, but Spring Boot can really do all this. This blog post demonstrates how easy ...

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Grails Tutorial for Beginners – Grails Service Layer


This tutorial will discuss the importance of the service layer in Grails and how to work with it. It also explains transaction management and how to utilize it. Introduction Separation Of Concerns Consider this analogy: Imagine a company where employees are assigned tasks on different nature of work. For example, say there is an employee named John Doe with the ...

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JDK 9 – a letter to Santa?!


As everybody knows, winter (especially the time before Christmas) is a proper time for dreaming and hoping a moment when dreams seem to be touchable. A moment when children and grown-ups write on paper or in their thoughts fictive or real letters to Santa Claus, hoping their dreams will become reality. This is catchy, as even the people behind OpenJDK ...

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Java EE 7 Hands-on Lab on WildFly and Docker


Java EE 7 Hands-on Lab has been delivered all around the world and is a pretty standard application that shows design patterns and anti-patterns for a typical Java EE 7 application. It shows how the following technologies can be used in a close-to-real-world application:               WebSocket 1.0 JSON Processing 1.0 Batch 1.0 Contexts & ...

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Writing your own logging service?


Application logging is one those things like favorite Editors war: everyone has their own opinions and there are endless of implemenations and flavors out there. Now a days, you likely would want to use something already available such as Log4j or Logback. Even JDK has a built in “java.util.logging” implementation. To avoid couple to a direct logger, many projects would ...

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In Favour of Self-Signed Certificates


Today I watched the Google I/O presentation about HTTPS everywhere and read a couple of articles, saying that Google is going to rank sites using HTTPS higher. Apart from that, SPDY has mandatory usage of TLS, and it’s very likely the same will be true for HTTP/2. Chromium proposes marking non-HTTPS sites as non-secure. And that’s perfect. Except, it’s not ...

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