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After I/O 2012

Starting from registration to giveaways, the I/O madness going far each year. Being sold in 20 mins this year, did not stop google to give away even more stuff. With this pace and expected release of google glass for next year, most probably next year registration will go even more chaotic! So Google, please either stop giving free stuff (I ...

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Reference to dynamic proxy in a proxied class

spring-interview-questions-answers

There was an interesting question in Stackoverflow about how a Spring Bean can get a reference to the proxy created by Spring to handle transactions, Spring AOP, Caching, Async flows etc. A reference to the proxy was required because if there is a call to itself by the proxied bean, this call would completely bypass the proxy. Consider an InventoryService ...

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ZK in Action: MVVM – Working Together with ZK Client API

In the previous posts we’ve implemented the following functionalities with ZK’s MVVM: load data into a table save data with form binding delete entries and update the View programmatically A key distinction between ZK MVVM and ZK MVC implementation wise is that we do not access and manipulate the UI components directly in the controller(ViewModel) class. In this post, we’ll ...

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Applying Back Pressure When Overloaded

How should a system respond when under sustained load? Should it keep accepting requests until its response times follow the deadly hockey stick, followed by a crash? All too often this is what happens unless a system is designed to cope with the case of more requests arriving than is it capable of processing. If we are seeing a sustained ...

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Project Jigsaw Booted from Java 8?

In his post Project Jigsaw: Late for the train, Mark Reinhold’s proposes ‘to defer Project Jigsaw to the next release, Java 9.’ He explains the reasoning for this: ‘some significant technical challenges remain’ and there is ‘not enough time left for the broad evaluation, review, and feedback which such a profound change to the Platform demands.’ Reinhold also proposes ‘to ...

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5 tips for proper Java Heap size

java-interview-questions-answers

Determination of proper Java Heap size for a production system is not a straightforward exercise. In my Java EE enterprise experience, I have seen multiple performance problem cases due to inadequate Java Heap capacity and tuning. This article will provide you with 5 tips that can help you determine optimal Java Heap size, as a starting point, for your current ...

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GlassFish Operations: Log Notifications

The of the most prominent requirements for application servers derive from the operations space. Taking this into account the next Java EE platform specification will focus entirely on platform as a service (PaaS) and cloud operations. Looking at what we have today still leaves a couple of questions unanswered. The one I get asked for quite a lot is: ‘How ...

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Native C/C++ Like Performance For Java Object Serialization

Do you ever wish you could turn a Java object into a stream of bytes as fast as it can be done in a native language like C++? If you use standard Java Serialization you could be disappointed with the performance. Java Serialization was designed for a very different purpose than serialising objects as quickly and compactly as possible. Why ...

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