Well, OK, maybe a lot more, but these technologies just work so sweet together that we decided to jump in and give it a go at the Devoxx UK 2015 Hackergarten. Heather VanCura, a leader of the Java Community Process (JCP), clubbed several developers together for some fun key bashing and this is the result. Enjoy! This hack session was brought to you by Bruno Baptista, Paulo Martins and Andy Gumbrecht, with thanks to Heather VanCura and Devoxx UK 2015. JCache API This API allows the use of caching methods in an intuitive and transparent manner. You need two things in your…
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After configuring Asynchronous EJB invocations on WebSphere for the last few weeks at work, I had some ideas on how Asynchronous EJBs would work on TomEE and how they can be configured. EJB 3.1 specification does not say anything about how to implement asynchronous invocations and the semantics can differ a bit between application servers. This article: Gives a short introduction into Asynchronous EJB Explains the configuration options of TomEE with respect to Asynchronous EJBs Provides some ideas on how to configure your own system Includes a project demonstrating configuration options with TomEE A Quick Introduction into Asynchronous EJBs The…
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The JCache JSR (JSR-107), finalized in late 2014, provides a standard mechanism to cache values in a map-like structure using a key. There are a number of different JCache implementations to choose from, and swapping between them should be no more difficult than swapping out .jar files on the classpath. In these examples, I will use Hazelcast which provides a distributed cache, giving the benefit that all of the nodes in the cluster are using the same cache and working consistently. CacheManager For anyone new to JCache, here are the basic concepts. It's also worth having a look at the…
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Overview JRebel 6.2 adds more support for TomEE. Traditionally TomEE support has relied on our regular Tomcat support and now TomEE is its own first-class platform. All flavors of TomEE are supported: TomEE Web Profile through PluME. Keep reading to see how you can leverage the awesome power of TomEE and get the productivity boost from JRebel! What is JRebel? JRebel is a developer's productivity tool. JRebel allows developers to reload code changes instantly. It skips the rebuild, restart, and redeploy cycle intrinsic in Java development. This enables developers to get more done in the same amount of time and…
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WebSockets are a good technical solution where there is a requirement for interactive communication. A typical example is a chat system, but it makes much better sense for live updates such as the stock market. Being able to see share prices go from red to green is a "must have" for stock traders. The WebSocket API is quite easy to use, but when it comes to security you don't have a lot of options. However, don't forget the first step in the WebSocket protocol is to upgrade a HTTP request. If you have a HTTP request, you should be able…
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Michal Kalkowski and Romain Manni-Bucau have both worked around the financial services domain. This post shares some of their experience, and shows how TomEE can fit this need. This post is linked to a related project available on GitHub at: https://github.com/rmannibucau/financial-batch.git Overview The project demonstrates a typical case of maintaining a universe of entities, which are taken from an external source. In this context that would be a list of securities from XETRA market, which are shared on the website as a file and updated daily. The goal of this batch is to capture these updates and make sure they…
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I don't know if we'll get a film after the international success of it but since few months the world is all about microservices. Whatever your opinion on it is you will surely have to work with it a little bit. One common way to go to production with microservices is to do a shade of your application and simply deploy an executable jar. Let go through common Microservice solutions which work with TomEE flavors. TomEE Shades A shade is a Maven plugin to aggregate project dependencies in a single jar. It can be done with Maven dependency plugin with some…
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We've teamed up with Codenvy to help make getting started with TomEE even easier than before! For those of you who don't know, Codenvy is a cloud-based IDE that supports a range of popular programming languages and frameworks. Best of all, its free to use and you don't even need to create an account to get started. You can go from zero to a running instance of a ready-to-edit application in TomEE in under 3 minutes and without leaving your browser. All this with a short guided tour to walk you through the whole process. Launching Codenvy We've added a…
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Developing resource adapters is surely one of the least known parts of the Java EE platform. Besides developing the component itself, additional knowledge is required for operating the component and customization work is slightly more complex for resource adapters. Whereas for servlets, most of the customization work for an operating environment is done by configuring the WebContainer thread pool size and the resource pool sizes. This article presents a demo application that allows you to play around with important properties for successful thread pool configuration of inbound resource adapters on TomEE. The Demo application The demo application is very simple.…
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Introduction and Scope Security is often of great concern and should be high on the list of any project goals. It covers a vast domain and Apache Tomcat, which relates directly to Apache TomEE, is no different in this regard. This first in a series of security related blog posts is not intended to be exhaustive, but aims at providing you with some insight into how Apache Tomcat and Apache TomEE security works. Apache TomEE provides much more than just Servlets or JSP's, as it does when it comes to the security related elements. The second post will focus more on…
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