Month: April 2015
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Enterprise Java
On Servlets and Async Servlets
The Servlet API, part of the Java EE standard, has long been (since 1998, when the 2.1 specification was officially…
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Software Development
It’s the Little Things: The PL/SQL NULL Statement, and why Every Language Should have One
Syntax is one of those topics. One of those emotional topics that lead to very very very important discussions. I…
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Scala
Scala Snippet: Object, Companion Object and Static Methods
If you are a Java developer moving to Scala, one notable difference in terminology that can cause confusion is the…
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Software Development
Meta-cycles in technology choices
I’ve been working on my keynote for QCon Beijing and looking at technology trends and choices since the 1950s. One…
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Enterprise Java
Farewell to Asynchronous Code
Quasar is a library that adds true lightweight threads (fibers) to the JVM. These are very cheap and very fast…
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Enterprise Java
Scalable, Robust – and Standard – Java Web Services with Fibers
This blog post discusses benchmarking web service performance under load. To learn more about the theory of web service performance,…
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Groovy
Grails 3 Released: Installing Gradle and Groovy 2.4 Support in Eclipse/GGTS
Grails 3 has been released with a ton of new features. If you’re used to adding a new Grails distribution…
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Software Development
Microservice Design Patterns
The main characteristics of a microservices-based application are defined in Microservices, Monoliths, and NoOps. They are functional decomposition or domain-driven design, well-defined…
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企业级Java
JPA入门教程 – 终极指南
编者按：Java持久化API（JPA）是Java语言中的应用程序编程接口规范，在基于Java平台标准版和Java平台企业版的应用程序中，JPA负责管理关系数据。 JPA已经成为事实上的标准，用于编写与数据库交互的代码。也正由于此，我们已经在Java Code Geeks提供了丰富的教程，可以在这里访问这些教程。此外，我们还制作了一本JPA迷你书，它能够帮助你入门JPA，而且顺利过渡到更高级的概念（加入我们的newsletter，可以免费获取）。 现在，我们想要建立一篇独立的、可做参考的文章：提供一个帮助你了解如何使用JPA的框架；并帮助你快速启动你的JPA应用程序开发。开始享受吧！ 目录 1. 简介 2. 创建项目 3. 基础知识 3.1. EntityManager和持久化单元（Persistence Unit） 3.2. 事务（Transactions） 3.3. 数据库表（Tables） 4.…
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