четвер, 10 квітня 2014 р.

The Top 10 Reasons why Java Rocks More Than Ever

The Top 10 Reasons why Java Rocks More Than Ever

ZeroTurnaround’s RebelLabs often publish awesome blog posts, which we can only recommend. In this case, we’ve discovered a very well-written series of blog posts explaining why Java is so great in 10 steps, by ZeroTurnaround’s Geert Bevin. The articles include:
The compiler is one of the things we take for granted in any language, without thinking about its great features. In Java, unlike C++, you can simply compile your code without thinking too much about linking, optimisation and all sorts of other usual compiler features. This is partially due to the JIT (Just In Time compiler), which does further compilation work at runtime.
The JDK’s core API consists of a very solid, stable and well-understood set of libraries. While many people complain about the lack of functionality in this area (resorting to Google Guava or Apache Commons), people often forget that the core API is still the one that is underneath all those extensions. Again, from a C++ perspective, this is a truly luxurious situation.
In this section, ZeroTurnaround’s Geert Bevin‘s mind-set aligns well with our own at Data Geekerywhen it comes to the spirit of Open Source – no matter whether this is about free-as-in-freedom, or free-as-in-beer, the point is that so many things about Java are “open”. We’re all in this together.
Again, a very interesting point of view from someone with a solid C++ background. We’re taking many things for granted as Java has had a very good threading and memory model from the beginning, which was corrected only once in the JDK 1.5 in 2004, and which has built a solid grounds for newer API like actor-based ones, Fork/JOIN, etc.
The JVM is the most obvious thing to talk about it has allowed for so many languages to work on so many hardware environments, and it runs so fast, nowadays!
… and the JVM also rocks because of bytecode, of course. Bytecode is a vendor-independent abstraction of machine code, which is very predictable and can be generated, manipulated, and transformed by various technologies. We’ve recently had a guest post by Dr. Ming-Yee Iu who has shown how bytecode transformations can be used to emulate LINQ in Java. Let’s hear it for bytecode!
15 years ago, developing software worked quite differently. People can write assembler or C programs with vi or Notepad. But when you’re writing a very complex enterprise-scale Java program, you wouldn’t want to miss IDEs, nowadays. We’ve blogged about various reasons why SQLJ has died. The lack of proper IDE support was one of them.
Remember when Oracle released Java Mission Control for free developer use with the JDK 7u40?Profiling is something very very awesome. With modern profilers, you can know exactly where your bottleneck is by simply measuring every aspect of your JVM. You don’t have to guess, you can know. How powerful is that?
While backwards-compatibility has its drawbacks, too, it is still very impressive how long the Java language, the JVM, and the JDK have existed so far without introducing any major backwards-compatibility regressions. The only thing that comes to mind is the introduction of keywords like assertand enum.
Could you imagine introducing the Java 8 Streams API, lambda expressions, default methods, generics, enums, and loads of other features without ever breaking anything? That’s just great!
In fact, this article is a summary of all the others, saying that Java has been a very well-designed and mature platform from the beginning without ever ceasing to innovate. And it’s true. With Java 8, a great next step has been published that will – again – change the way the enterprise perceives software development for good.

Java Rocks More Than Ever

It does, and it’s a great great platform with a bright future for all its community participants

вівторок, 8 квітня 2014 р.

MongoDB 2.6: Our Biggest Release Ever

MongoDB 2.6: Our Biggest Release Ever
In the five years since the initial release of MongoDB, and after hundreds of thousands of deployments, we have learned a lot. The time has come to take everything we have learned and create a basis for continued innovation over the next ten years.
Today I’m pleased to announce that, with the release of MongoDB 2.6, we have achieved that goal. With comprehensive core server enhancements, a groundbreaking new automation tool, and critical enterprise features, MongoDB 2.6 is by far our biggest release ever.
You’ll see the benefits in better performance and new innovations. We re-wrote the entire query execution engine to improve scalability, and took our first step in building a sophisticated query planner by introducing index intersection. We’ve made the codebase easier to maintain, and made it easier to implement new features. Finally, MongoDB 2.6 lays the foundation for massive improvements to concurrency in MongoDB 2.8, including document-level locking.
From the very beginning, MongoDB has offered developers a simple and elegant way to manage their data. Now we’re bringing that same simplicity and elegance to managing MongoDB. MongoDB Management Service (MMS), which already provides 35,000 MongoDB customers with monitoring and alerting, now provides backup and point-in-time restore functionality, in the cloud and on-premises.
We are also announcing a game-changing feature coming later this year: automation, also with hosted and on-premises options. Automation will allow you to provision and manage MongoDB replica sets and sharded clusters via a simple yet sophisticated interface.
MongoDB 2.6 brings security, integration and analytics enhancements to ease deployment in enterprise environments. LDAP, x.509 and Kerberos authentication are critical enhancements for organizations that require a single authentication mechanism across their entire infrastructure. To enhance security, MongoDB 2.6 implements TLS encryption, user-defined roles, auditing and field-level redaction, a critical building block for trusted systems. IBM Guardium also now offers integration with MongoDB, providing more extensive auditing abilities.
These are only a few of the key improvements; read the full official release notes ( for more details.
MongoDB 2.6 was a major endeavor and bringing it to fruition required hard work and coordination across a rapidly growing team. Over the past few years we have built and invested in that team, and I can proudly say we have the experience, drive and determination to deliver on this and future releases. There is much still to be done, and with MongoDB 2.6, we have a foundation for the next decade of database innovation.
Eliot Horowitz, CTO and Co-Founder
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Small Spring Rest issue

Today I've got 415 Unsupported Media Type on Spring MVC based project for such method

There was incorrect parameter consumes = "application/json". I'd forgotten to remove it when changed RequestMethod from POST to GET. Perhaps it could be useful for somebody.

понеділок, 24 березня 2014 р.

четвер, 20 березня 2014 р.

JEEConf 2014

Революція закінчилась і настав час важко працювати, щоб все навколо нарешті стало краще. А для того, щоб ваша праця стала максимально ефективно потрібно постійно самовдосконалюватись. Вже незабаром в Києві відбудеться найбільша українська і найкраща східноєвропейська конференція JEEConf 2014. Вважаю,  що кожен поважаючий себе Java  розробник повинен відвідати цю конференцію як наймасштабнішу подію у професійному Java світі України. 
Тому піднімайтеся та швиденько замовляйте квитки.
 Десятки провідних спеціалістів у галузі будуть доповідачами, понад тисяча відвідувачів - два дні тренінгів та ще два дні доповідей. Не зівайте. Пора ставати до праці.

середа, 19 березня 2014 р.

JDK 8 Is Released!

Сьогодні відбулась найбільш значніша зміна в Java з часів релізу Java 5(Вересень 30, 2004)

Офіціний реліз Java 8.

Work on features in the prototype Java SE 8 Reference Implementation (JDK 8), was organized in terms of JDK Enhancement Proposals (JEPs).[141]
  • JSR 335, JEP 126: Language-level support for lambda expressions (officially, lambda expressions; unofficially, closures) under Project Lambda.[142] There was an ongoing debate in the Java community on whether to add support for lambda expressions.[143][144] Sun later declared that lambda expressions would be included in Java and asked for community input to refine the feature.[145]
  • JSR 223, JEP 174: Project Nashorn, a JavaScript runtime which allows developers to embed JavaScript code within applications
  • JSR 308, JEP 104: Annotations on Java Types for Unsigned Integer Arithmetic[146]
  • JSR 310, JEP 150: Date and Time API
Java 8 is not supported on Windows XP.[147]

Посилання на статтю реліза:

пʼятниця, 14 березня 2014 р.

Central European Academy Studies and Certification (CEASC) "Трансфер інновацій або Вихід на сучасний ринок праці ЕС"

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Central European Academy Studies and Certification (CEASC) "Трансфер інновацій або Вихід на сучасний ринок праці ЕС"
стажування для студентів, 11-17 травня, м. Лодзь, м. Бидгощ (Польща)
Фундація Central European Academy Studies and Certification   (CEASC), Польща у співпраці зУніверситетом Інформатики та Мистецтв (WSIiU), Лодзь, Польща та Вищою Школою Економіки(WSG), Бидгощ, Польща в рамках проектуBusinessWeek-2014 оголошують набір учасників тижневої навчально-ознайомчої практики серед студентів ВНЗ України.
Цільова група проекту: студентська молодь 4х - 6х курсів (30-45 осіб). Як виключення допускається участь студентів молодших курсів.
Тривалість стажування: 6 днів (11-17 травня 2014 року), м. Лодзь, м. Бидгощ (Польща).
Мета навчально-ознайомчої практики (стажування) - набуття навичок роботи за майбутньою  спеціальністю і підтвердження знання іноземних мов.
Учасники стажування отримають Сертифікат – свідоцтво про проходження зарубіжної навчально-ознайомчої практики.
Робочі мови: польська (з перекладом), англійська, українська та російська.
Вартість: 1300,00 грн та 250,00 Євро.
Включає в себе: проїзд, проживання, безкоштовний доступ до Internet в місцях навчання та проживання, дворазове харчування (сніданки та обіди), навчальна програма, роздатковий матеріал, сертифікат, культурна програма, інтеграційна та підсумкова вечірки, візова підтримка (без врахування візового збору).
Керівник проекту
Ольга Поліщук
093 210 93 42

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