Cheat Sheet: New Features in JPA 2.1

JPA 2.1 introduced 12 new features, like StoreProcedureQueries, Entity Graphs and Attribute Converter, to make your work with the database easier and more efficient.
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This 5 page cheat sheet brings you:

- a short description and
- code snippets for each feature,
- links to more detailed articles.

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Java Weekly 15/15: GC tuning, HTTP2, good Javadoc, MVC 1.0 early draft

The Java world is evolving at a rapid pace and it can be challenging to keep track of it. Fortunately lots of great resources are created every week, explaining new features or looking at existing stuff from a different angle.

I am using the Java Weekly series to collect the most interesting links I found during the last week and present them to you all in one place. I hope you find it useful and that it makes it easier for you to keep up-to-date. If you like to suggest a resource or something I can improve on, please leave me a comment.


The Garbage Collector (GC) is one of the most common causes for slow application performance. Haim Yadid wrote a great post explaining how to analyze GC pauses and which four strategies you can use to reduce them: Java Performance Tuning: Getting the Most Out of Your Garbage Collector.

Writing JavaDoc is useful! Everyone of us knows that. But that doesn't mean, that we always write it. Thierry Wasylczenko wrote a nice article reminding us why we should take more care about our Javadoc and explaining the 9 tags that can be used to create a good documentation of our source code.

Java EE 8

The JSR 371 - MVC 1.0 is the first Java EE 8 related JSR to enter the Early Draft Review. David Delabassee created a short write-up about it with the slides of his JavaLand presentation and several other useful links to review and test the specification.


Beginning with 9.0.0.Beta1, the Wildfly application server will support HTTP/2. If you want to learn more about Multiplexing, Header Compression and Server Push, you can have a look at this great in depth overview of HTTP/2 by the Wildfly team.

This and that

Heinz Kabutz published his recent issue of the Java Specialists' Newsletter. This time he talks about how to become a Campion Programmer.

Dan McKinley wrote a great article on choosing technology. His recommendation is to make mindful choices. There should always be an issue with the current technology stack that you want to solve with the new one: Choose Boring Technology.


Markus Eisele gave an interesting talk about architecting large enterprise Java projects and showed us that Java EE is quite a good fit to implement applications based on a microservice architecture.

Upcoming online events

Josh Long will talk about Building "Bootiful"­ Microservices with Spring Cloud on Thursday 9th at 5pm UTC at the virtual JUG.

See you next Monday

for the next issue of Java Weekly. You don't want to wait so long, than follow me on twitter, where I share great resources during the week.

If you like to suggest a link for next weeks issue or something I can improve on, please write me a comment.

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