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Unread items (100)

• May 19, 2012
• 17:20

  Survey Confirms Scaling Agile Across The Organisation Is Still A Challenge

   » ‎ InfoQ
  Forrester have recently released the results of their November 2011 Global Agile Software Application Development Online Survey in a report entitled "Survey Results: How Agile Is Your Organization?" It contains a number of interesting findings around how organisations that have adopted Agile are dealing with their implementation. By Craig Smith

• 11:24

  Lucene Setup on OracleDB in 5 Minutes

   » ‎ Java Zone - The heart of the Java developer community
  This tutorial is for people who want to run an Apache Lucene example with OracleDB in just five minutes.What you need to run this example:Eclipse .Oracle DB... we will use SCOTT schema.Be Excited ;) First Minute: Quick introduction... What is Apache-Lucene ? Preview Text:  This tutorial is for people who want to run an Apache Lucene example with...

• 8:32

  Is Beautiful Usable, or Is It the Other Way Around?

   » ‎ InfoQ
  A group of researchers from two European universities have evaluated if “what is beautiful is usable” is true in software, and they have concluded that “what is usable is beautiful.” By Abel Avram

• 7:00

  Comic for May 19, 2012

   » ‎ Dilbert Daily Strip
  

  
  

  

• 6:18

  Basic XML Processing With Scala

   » ‎ Java Zone - The heart of the Java developer community
  Pretty much everybody knows what XML is: it is a structured, machine-readable text format for representing information that can be easily checked for the “grammaticality” of the tags, attributes, and their relationship to each other (e.g. using DTD’s). This contrasts with HTML, which can have elements that don’t close (e.g. <p>foo<p>bar rather than...
• 6:16

  Development Without Constraint

   » ‎ Java Zone - The heart of the Java developer community
  A presentation on developing apps with the JCR as a data storage. This includes an interesting discussion of the general topic of RDBMS verus non-relational ( NoSQL ) database offerings. Preview Text:  A presentation on developing apps with the JCR as a data storage. This includes an interesting discussion of the general topic of RDBMS verus...
• 6:14

  Posting a New ATOM Entry to Atom Hopper Using Node.js

   » ‎ Java Zone - The heart of the Java developer community
  Previously I blogged about how you can use Apache Abdera to post ATOM entries to an AtomPub server like Atom Hopper. Today I’ll show you how to do something similar but with Node.js.Note: The code below is a simplistic example and would need modifications to become production quality. This code can be used for testing purposes, etc. Preview Text:  ...
• 6:06

  The Book That Every Programmer Should Read

   » ‎ Java Zone - The heart of the Java developer community
  No, it’s not Knuth’s “The Art of Programming”. I’m talking about quite an easy-to-read (compared to TAoP) book, which, in fact, does not require any engineering or mathematical background from the reader. I am talking about C. Petzold’s “CODE”. It is a truly remarkable book about how computers work. Let me explain why I think this book is so awesome. Preview Text:  ...
• 6:00

  Learn What Platforms Can Do For You: Mini-Hacks

   » ‎ Java Zone - The heart of the Java developer community
  Free hands-on training and plenty of developer sessions are what you'll find at the Cloudstock portion of the Cloudforce 2012 tour, which is landing in London on May 22.   Preview Text:  Quinton Wall currently does Ruby development on Heroku, iOS programming, and defines blueprints for Social Enterprise applications. We had the chance to...

• May 18, 2012
• 18:49

  ICEmobile - Enabling Enterprise Mobility with JSF

   » ‎ TheServerSide.com: News
  I am pleased to announce a new article from Stephen Maryka. Stephen is the Chief Technical Officer at ICEsoft Technologies Inc. Stephen provides an overview of ICEmobile, which enables Java Enterprise developers to build web applications that provide the native look, feel, and capabilities of the mobile devices from which they are accessed. ICEmobile delivers a user experience that matches native mobile applications, and it does so in a way that adapts seamlessly to the various device platforms.
  
  
  

• 18:15

  Poll: Would You Buy Facebook?

   » ‎ Java Zone - The heart of the Java developer community
  The hot topic in the tech world today is Facebook's IPO, wherein big-name investors are scrambling for Facebook shares initially priced at $38 per share.  These shares have already hit the market, and the price is rising quickly. We'd like to hear what you think of all this hullaballoo. Please participate in the poll below and let us know: Would you...

• 18:12

  Presentation: Machine Learning on Big Data for Personalized Internet Advertising

   » ‎ InfoQ
  Michael Recce discusses how advertising works and what algorithms Quantcast uses to analyze large amounts of data in order to find out what people are interested in. By Michael Recce

• 17:16

  New Bio4j General Domain Model Schema Available

   » ‎ Java Zone - The heart of the Java developer community
  Hi everyone! Preview Text:  The creator of Bio4j made a general domain model including al node types and relationships in order to get a better picture of how data is related. Sponsored:  unsponsored

• 17:10

  Presentation: Objects, Anomalies, and Actors: The Next Revolution

   » ‎ InfoQ
  Steve Vinoski believes that actor-oriented languages such as Erlang are better prepared for the challenges of the future: cloud, multicore, high availability and fault tolerance. By Steve Vinoski

• 16:06

  Video: More Issues Around Cloud Adoption with Ben Kepes

   » ‎ Java Zone - The heart of the Java developer community
  CloudU Notebooks is a weekly blog series that explores topics from the CloudU certificate program in bite sized chunks, written by me, Ben Kepes, curator of CloudU. How-to’s, interviews with industry giants, and the occasional opinion piece are what you can expect to find. If that’s your cup of tea, you can subscribe here. Preview Text:  A...

• 12:44

  How to prioritize tasks based on their value

   » ‎ InfoQ
  Bob Marshall in his new blog post, "The Value", summarises his research on different methods of prioritisation. Together with Grant Rule he developed a new way of understanding team and company goals. By Marta Jasinska
• 12:30

  Do Software Engineers Need a Degree in Computer Science?

   » ‎ InfoQ
  The role of a software Engineer” does not necessarily require a degree in Computer Science. In his article for Dr. Dobb’s, “Software Engineers All!” Andrew Binstock discusses whether software engineers really require a degree in computer science to perform an excellent job. By Michael Stal
• 12:23

  Interview: Trisha Gee from LMAX Discusses Concurrent Java Programming, Agile, and Diversity in IT

   » ‎ InfoQ
  In a wide-ranging interview, LMAX's Trisha Gee talks to Charles Humble about using Java for low latency programming, and the Disruptor, an open source concurrent programming framework developed by LMAX. She also discusses the agile management techniques used at LMAX, and issues around gender and ethnic diversity in IT. By Trisha Gee

• 11:33

  Mes prochains Events en tant que Speaker..

   » ‎ QualityStreet
  Aprés ScrumDay et MixIT, le rythme des confrénces ne baisse pas… Retrouvez- moi ici et ailleurs pour parler de Management Agile, de Facilitation, d‘AgileUX / LeanUX, de Sketching ou encore de Jeux Agiles et de Coaching. Et surtout n’hésitez pas à venir me voir avant ou aprés les sessions, c’est toujours un plaisir d’échanger quelques mots [...]

  
  

  

• 7:50

  Spring Integration - Splitter-Aggregator

   » ‎ Java Zone - The heart of the Java developer community
  Within Spring Integration, one form of EIP scatter-gather is provided by the splitter and aggregator constructs. Semantics for both of these are pretty straight forward to understand, the splitter receives an input message and returns a list of objects that are each turned into first-class messages. Those messages get routed to message handlers following which they are aggregated as a list ...

• 7:16

  Le cercle des PO est apparu

   » ‎ Scrum - Méthodes agiles

  Je donnais cette semaine une formation Scrum dans une entreprise où les notions de MOA et MOE[1] sont encore présentes. Lors des discussions avec les participants, il est apparu que des pratiques agiles étaient déjà appliquées, mais qu'elles étaient confinées au développement, en gros que l'agilité s'arrêtait à la MOE. Le manque d'implication des... Lire Le cercle des PO est apparu

• 7:00

  Comic for May 18, 2012

   » ‎ Dilbert Daily Strip
  

  
  

  

• 6:59

  CouchDB versus Couchbase: What are the differences, and what happened to Membase?

   » ‎ InfoQ
  Recently Couchbase published a comparison of Couchbase and CouchDB to denote the differences and simlarities between the two. This document addresses a common question: "What is the difference between CouchDB and Couchbase?", and what happened to Membase? InfoQ caught up with James Phillips, a Couchbase founder, to discuss the comparison and the merger of the two products Membase and CouchDB. By Rick Hightower

• 6:56

  Setting up Console Debugging for PhoneGap and Android

   » ‎ Java Zone - The heart of the Java developer community
  In case you haven't figured it out yet, debugging in mobile is "sub-optimal". Preview Text:  In case you haven't figured it out yet, debugging in mobile is "sub-optimal". (Whatever you do - don't do a Google Images search on sub-optimal.) Brian Leroux has an epic presentation on the topic and I highly encourage taking...
• 6:56

  Developing Your Own Solr Filter

   » ‎ Java Zone - The heart of the Java developer community
  Sometimes Lucene and Solr out of the box functionality is not enough. When such a time comes, we need to extend what Lucene and Solr gives us and create our own plugin. In today's post I’ll try to show you how to develop a custom filter and use it in Solr. Preview Text:  Sometimes Lucene and Solr out of the box functionality is not enough....
• 6:34

  Infrastructure Tooling Anti-Patterns: Accumulator

   » ‎ Java Zone - The heart of the Java developer community
  As our (or our clients) infrastraucture grows and runs for longer durations, I have noticed that there are certaion parts of our infrastructure that are known only by certain people to a certain extent. Due to the nature of IT operations, most of the engineers stay in firefighting mode, and fix they some of the problem with a manual hotfix (be it stability related issues, security related...
• 6:20

  Video: How to Combine Neo4j with GWT and Eclipse

   » ‎ Java Zone - The heart of the Java developer community
  As stated before I did my first testings with Neo4j. Now I wanted to include Neo4j to GWT which is actually very straight forward but for some reasons I was fighting with it for quite a while. I even had to emberass myself by asking stupid questions on the neo4j mailinglist to which Peter and John Doran kindly responded. Preview Text:  This...
• 6:10

  Java float Precision Changes When Unexpectedly Up-casting to double

   » ‎ Java Zone - The heart of the Java developer community
  I ran across a little gotcha today where a float value being inserted into another object container (JSONObject) was not holding the precision of the original value. The JSONObject actually takes a double not a float, and I overlooked the up-casting initially until I started unit testing. (have to love unit tests!) here is a print of the values I started with: Preview Text:  ...
• 6:08

  Clojure: Conditionally Importing

   » ‎ Java Zone - The heart of the Java developer community
  I recently ran into a test that needed (org.joda.time.DateTime.) to always return the same time - so it could easily be asserted against. This situation is fairly common, so it makes sense to add support to expectations. However, I didn't want to force a joda-time dependency on everyone who wanted to use expectations. Luckily, Clojure gives me the ability to conditionally import...
• 6:04

  Don't Call Names - Roo's Tag With a Tag Problem

   » ‎ Java Zone - The heart of the Java developer community
  Eureka, ish.. I was trying to find time to debug a problem that's been on my backlog for a while, and someone else ran into it. A reader over on the Manning Spring Roo in Action forum was getting hit with a 400 invalid request error when trying one of the samples from the book (the many-to-many example). Preview Text:  I was trying to find...
• 6:00

  Real-Time Data: What To Do With It

   » ‎ Java Zone - The heart of the Java developer community
  At the CloudStock event in San Francisco this year, Alex Toussaint, Director, Product Management,  of Platform API Services at Salesforce.com, joined MuleSoft CTO and founder Ross Mason along with Dr. Preview Text:  I had a chance to talk with Alex Toussaint this month and ask him about some of the things he's working on. He comes from a...
• 6:00

  Common try-with-resources Idiom Won't Clean Up Properly

   » ‎ Java Zone - The heart of the Java developer community
  So I was re-reading some blogs on the JDK 7 language changes and I noticed the following idiom seems popular: Preview Text:  The lesson here is that the impact of some of the new JDK 7 constructs are going to a little bit subtler than we might expect. Sponsored:  unsponsored ...
• May 17, 2012
• 19:35

  CloudBees BuildHive is Alive!

   » ‎ Java Zone - The heart of the Java developer community
  GitHub users rejoice!  Today CloudBees announced the release of BuildHive, a continuous integration tool that enables build/text jobs for existing GitHub repositories.  CloudBees is currently a leading "Java in the Cloud" service that should be well-known to avid DZone readers.   BuildHive is cloud-powered by Jenkins, the popular Java-based open source continuous integration tool. ...

• 19:27

  Apache Camel Tutorial - Introduction to EIP, Routes, Components, Testing and other Concepts

   » ‎ TheServerSide.com: News
  Data exchanges between companies increase a lot. The number of applications, which must be integrated increases, too. The interfaces use different technologies, protocols and data formats. Nevertheless, the integration of these applications shall be modeled in a standardized way, realized efficiently and supported by automatic tests. Such a standard exists with the Enterprise Integration Patterns (EIP) [1], which have become the industry standard for describing, documenting and implementing integration problems
  
  
  

• 17:43

  Re-Invent Software Delivery and Offer Your Business as a Service

   » ‎ Java Zone - The heart of the Java developer community
  As business leaders focus on growth during 2012, they are identifying business expansion and transformation opportunities.  The resulting IT mandate to rapidly evolve mobile and social interactions is forcing CIOs to re-invent their software delivery.  By following a straightforward four-step plan, CIOs can improve productivity, enhance agility, deliver timely solutions, and help fulfill...

• 17:10

  Presentation: Pallet - DevOps for the JVM

   » ‎ InfoQ
  Antoni Batchelli introduces Pallet, a devops platform for the JVM for provisioning and configuring servers, configuring clustered services, deploying and managing software, servers and services. By Antoni Batchelli

• 16:14

  On Developing for the Cloud with Cloudbees

   » ‎ Java Zone - The heart of the Java developer community
  There's a lot of buzz about deploying applications in the cloud, but what about developing applications in the cloud? In my opinion that's the next level of cloud adaptation. I recently got a FOSS (free and open source) account on CloudBees.com for my open source Qualitas project. I'm very impressed with what it can do for you. Read below to know all the details. Preview Text:  ...

• 16:09

  Presentation: Quantum, Virtual Networks for OpenStack

   » ‎ InfoQ
  Salvatore Orlando introduces OpenStack and Quantum, a project intended to provide network connectivity as a service, covering the current state and expected developments in the future. By Salvatore Orlando

• 15:59

  Progress Report from CamelOne 2012 in Boston (Apache Camel, ActiveMQ, ServiceMix, CXF)

   » ‎ Java Zone - The heart of the Java developer community
  This week, I was at CamelOne 2012 in Boston, organized by FuseSource.  The sessions addressed several open source integration projects from Apache. Here is a short summary of the event... Preview Text:  This week, I was at CamelOne 2012 in Boston, organized by FuseSource. Sessions covered several open source projects such as Apache Camel, Apache...
• 15:43

  Before Choosing Know Your Cloud Dimensions

   » ‎ Java Zone - The heart of the Java developer community
  Summary:  Before selecting PaaS infrastructure, understand how sharing, location, and responsibility impact your public/private Cloud and internal/external Cloud decision. Preview Text:  Before selecting PaaS infrastructure, understand how sharing, location, and responsibility impact your public/private Cloud and internal/external Cloud...

• 12:11

  Article: Distributed Version Control Systems in the Enterprise

   » ‎ InfoQ
  Every major Open Source project worldwide has already embraced Distributed Version Control Systems (DVCS), will enterprises be next? By Pablo Santos

• 11:47

  Easy Unit and Integration Code Coverage

   » ‎ Java Zone - The heart of the Java developer community
  This example shows how to generate coverage for unit and integration tests using Maven and Sonar. It uses very simple techniques and should only take 10-15 minutes to get running in any existing Maven build. It can be used across unit, integration, ATDD or any other kind of test suite. The coverage results are shown in Sonar. Preview Text:  This...

• 7:00

  Comic for May 17, 2012

   » ‎ Dilbert Daily Strip
  

  
  

  

• 6:59

  How to pick an ESB - Comparison Criteria

   » ‎ Java Zone - The heart of the Java developer community
  All Enterprise Service Bus (ESB) products may be used to build and deploy services, encapsulate legacy systems, route messages, transform message formats, and perform protocol mediation.  Many WSO2 prospects ask me ‘What differentiates WSO2 Enterprise Service Bus?’  This blog post shares my perspective and scales the conversation. Preview Text:  ...
• 6:56

  5 Things Amazon Taught me About Deployment Automation

   » ‎ Java Zone - The heart of the Java developer community
  Early this week, I noticed a lightbulb went out and we were out of spares. Instead of adding a trip to the store to my todo list, my first instinct was to order a lightbulb off Amazon with two day shipping. That would be a little crazy if I didn’t have Amazon Prime. Preview Text:  Eric Minick gives us 5 takeaways we can learn about deployment...
• 6:54

  Designing Search (Part 4): Displaying Results

   » ‎ Java Zone - The heart of the Java developer community
  In an earlier post we reviewed the various ways in which an information need may be articulated, focusing on its expression via some form of query. In this post we consider ways in which the response can be articulated, focusing on its expression as a set of search results. Preview Text:  In this post we consider ways in which the response can...
• 6:44

  Scaling Android Emulator Size: Without using Eclipse

   » ‎ Java Zone - The heart of the Java developer community
  As you might have read following my previous post I'm currently experimenting with mobile web solutions. In such a case, having an Android emulator is quite comfortable for quickly testing your solution. Personally though, I hate the default emulator skin, mainly also because it takes up quite a large portion of your screen. Hence, I normally use a custom emulator skin. Preview...
• 6:38

  Thursday Code Puzzler: Needles In the Haystack

   » ‎ Java Zone - The heart of the Java developer community
  By now you should be familiar with our Thursday Code Puzzler slot. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you think is suitable. Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer.  It's all about the participation!Find...
• 6:24

  Starting Clojure

   » ‎ Java Zone - The heart of the Java developer community
  I’ve wanted to put together a long-form introductory Clojure screencast for some time.  I had an opportunity to do this in grand style yesterday in a live O’Reilly webcast, but, for various reasons, I wasn’t fond of how that came together.  So, I cut another live coding screencast that introduces, in various levels of detail:  Preview Text:  ...
• 6:22

  JavaFX-Based SimpleDateFormat Demonstrator

   » ‎ Java Zone - The heart of the Java developer community
  One of the things that can be a little tricky for developers new to Java or even for experienced Java developers new to formatting with Java Dates, is the specification of a date/time format using SimpleDateFormat. The class-level Javadoc-based documentation for SimpleDateFormat is pretty thorough in its coverage of patterns representing various components of a date/time. Preview...
• 6:20

  Android Action Bar Style Generator

   » ‎ Java Zone - The heart of the Java developer community
  Jeff Gilfelt (@readyState, http://jeffgilfelt.com/) just released a brilliant new tool for generating Android action bar styles. The online tool supports generating action bar styles for Android vanilla action bar as well as for ActionBarSherlock. Preview Text:  Jeff Gilfelt (@readyState, http://jeffgilfelt.com/) just released a brilliant new...

• 5:17

  Design Thinking and Culture of Collaboration

   » ‎ InfoQ
  Design thinking is about creating vision of the future, not just managing the present. Bill Burnett from Stanford University recently spoke about design thinking and what questions we need to ask to shift from design to design thinking. By Srini Penchikala

• 1:22

  Spring MVC 3.2 Preview: Chat Sample

   » ‎ Interface21 Team Blog
  My last blog post was based on a Spring AMQP stocks sample that involved reacting to external events. This blog post continues that theme with a chat sample where the external events are not AMQP messages but rather HTTP POST requests. Later on I'll switch to a distributed chat where the events will be Redis Read more...

• May 16, 2012
• 22:23

  CamelOne DayTwo, gamification trends and more

   » ‎ TheServerSide.com: News
  After listening to Gabe Zichermann's open keynote this morning, I'm left with a fairly strong impression that the business applications of the future are going to have to compete with extremely popular internet phenomena like Facebook for workers' mindshare.
  
  
  
• 20:21

  CamelOne DayTwo, gamification trends and more

   » ‎ TheServerSide.com: News
  After listening to Gabe Zichermann's open keynote this morning, I'm left with a fairly strong impression that the business applications of the future are going to have to compete with extremely popular internet phenomena like Facebook for workers' mindshare.
  
  
  

• 20:11

  Judge Alsup Doesn't Listen to Atwood: Learns to Code

   » ‎ Java Zone - The heart of the Java developer community
  The latest news in the Oracle v Google courtroom drama is that developer Judge Alsup has been coding Java in his spare time - maybe Google should have hired him to write those bits of code that got them into this mess. The day that Jeff Atwood questioned the 'everyone should learn to code' movement, we find that the Java community's most famous judge...
• 18:38

  Why I'm Excited About Using Neo4j for a CMDB Backend

   » ‎ Java Zone - The heart of the Java developer community
  Zkybase is my first open source configuration management database (CMDB) effort, but it’s not the first time I’ve built a CMDB. Preview Text:  Willie Wheeler's Zkybase is an effort at an open source configuration management tool - here's how he came to the conclusion that Neo4j would improve the backend.

• 18:37

  Hip? Or Hype? Load & Performance Testing from the Cloud

   » ‎ TheServerSide.com: News
  An article from experienced load & performance tester, Steve Weisfeldt Senior Performance Engineer at Neotys, about considerations to think about when moving to a cloud-based load testing strategy. He also identifies approaches to ensure that your move goes successfully and you get the value that is offered by the cloud.
  
  
  

• 17:10

  Presentation: Grid Gain vs. Hadoop. Why Elephants Can't Fly

   » ‎ InfoQ
  Dmitriy Setrakyan introduces GridGain, comparing it and outlining the cases where it is a better fit than Hadoop, accompanied by a live demo showing how to set up a GridGain job. By Dmitriy Setrakyan
• 16:09

  Presentation: Games for the Masses - How DevOps Affects Architecture Design

   » ‎ InfoQ
  Jesper Richter-Reichhelm presents the DevOps integration at Wooga, and how their system architecture has evolved over the years in order to cope with the increasing number of players. By Jesper Richter-Reichhelm

• 13:55

  The Pitfalls of Naming Classes

   » ‎ Java Zone - The heart of the Java developer community
  One of the things that we all do on a daily basis in our work is to name objects. It’s an activity that we take for granted without ever giving it much thought. It’s also something that we often get wrong and sometimes do badly and there are a couple of reasons for this. Firstly, classes can just be given the wrong name and no one bothers to change it. Preview Text:  ...

• 12:02

  Article: Swarming Across Distance

   » ‎ InfoQ
  "Swarming" is a technique whereby many members of a team work together to deliver a User Story, taking advantage of the skills of many team members working together at the same time. It is recognised as a powerful approach to delivering high quality stories quickly. Johanna addresses how to achieve the same results when your team is geographically distributed? By Johanna Rothman

• 10:01

  Is VM size an architectural smell?

   » ‎ Coding the Architecture

  A couple of months ago I went to an excellent set of talks at LJC night at QCon. This not only inspired my entry on staleness but also made me think about some more architectural smells.

  Gil Tene from Azul spoke about the maximum size of VMs we all use. A quick show of hands indicated that the maximum size of VM heap memory most of us ran was 2-4GB. Gil argued, quite convincingly, that this was due to legacy issues with garbage collection but new techniques should make this limit redundant.

  I sort of agree... However, even if all the issues surrounding garbage collecting large VMs is solved, the 2-4GB limit is still a useful one.

  In Architectural Smells I argued that there are architectural smells in the same way that there are code smells (aspects of a system that indicate but not guarantee a possible issue) and the example I gave was caching. I also think that VM size is an architectural smell.

  When designing complex systems one of the most common design guidelines is to split differing responsibilities into specific services. Non-functional requirements may complicate this but most of us try to avoid having all functionality in a single service. Certain services are obviously distinct and can be isolated. However it's easy for functionality creep to result in a service gaining a lot of responsibilities and this often results in a larger run-time footprint.

  During testing this shows itself as a service requiring a large VM - certainly in comparison to other services. I view this as an architectural smell and analyse the service to see if it should be split up. (Easier if you have some form of lightweight and iterative design process.)

  This is very similar to the code smell of long method. It's rare that your code size or service size starts out by being too large but tends to happen over time. This is a good reason why an architect can't just throw it over the wall but needs to stay involved with the project. As developers add code to the system the design might need to change.

  Whether you take an absolute size or relative size will depend on your system in question. Personally, I get concerned when a service is larger than 1GB unless its prime purpose is data storage and even then the data should probably be clustered across services rather than in a single block - but that's an argument for a different occasion.

• 9:30

  [Java] Une autre vision de Devoxx'

   » ‎ Developpez - Récapitulatif Java

  Un des éléments ayant le plus marqué cette première édition de Devoxx France 2012, c'est l'hôtel Marriott et plus particulièrement sa moquette.

  » Lire la suite!

  Billet original publié sur les blogs de developpez.com...

• 7:58

  Devops: How NOT to Collect Configuration Management Data

   » ‎ Java Zone - The heart of the Java developer community
  Hi all, Willie here. This time we’re going to step away from the keyboard and get architectural. But no ivory towers here. In my next two blog posts, I’m going to give you something that will get you out of lots of pointless meetings. Got your attention yet? Good! Preview Text:  In this article we’re going to step away from the keyboard...

• 7:00

  Comic for May 16, 2012

   » ‎ Dilbert Daily Strip
  

  
  

  

• 6:57

  High CPU Troubleshooting Guide

   » ‎ Java Zone - The heart of the Java developer community
  This article is part 1 of a series that will provide you with a comprehensive guide on how you can troubleshoot and identify root cause of Java high CPU problems. Preview Text:  Before pulling the trigger and shutdown your Java VM process, ask yourself the following question: do I have all the data available to perform a root cause analysis post...
• 6:46

  Creating a Custom Camel Component

   » ‎ Java Zone - The heart of the Java developer community
  While Camel supports an ever growing number of components, you might have a need to create a custom component. This could be to either promote reuse across projects, customize an existing component or provide a simplified interface to an existing system. Whatever the reason, here is an overview of the options that are available within the Camel framework... Preview Text:  ...
• 6:44

  Specifying Appropriate NetBeans JDK Source Release

   » ‎ Java Zone - The heart of the Java developer community
  NetBeans uses its projects' settings for javac.source (and javac.target) in more ways than simply enforcing javac's use of the -source and -target. Preview Text:  NetBeans uses its projects' settings for javac.source (and javac.target) in more ways than simply enforcing javac's use of the -source and -target. In this post, I look at some...
• 6:42

  Algorithm of the Week: Karatsuba Fast Multiplication

   » ‎ Java Zone - The heart of the Java developer community
  Introduction Typically multiplying two n-digit numbers require n2 multiplications. That is actually how we, humans, multiply numbers. Let’s take a look of an example in case we’ve to multiply two 2-digit numbers. Preview Text:  Typically multiplying two n-digit numbers require n2 multiplications. That is actually how we, humans, multiply...
• 6:41

  Filtering FindBugs Reports by Rank

   » ‎ Java Zone - The heart of the Java developer community
  I’ve been messing with the FindBugs Ant task today to incorporate it into my company’s automated build for a JEE application. One task I wanted to do was filter the bug report by rank. There is an easy way to do this, which is documented here. However, the documentation is not clear on exactly how FindBugs uses the rank value. Preview Text:  ...
• 6:30

  Finite State Automata in Lucene

   » ‎ Java Zone - The heart of the Java developer community
  Lucene Revolution 2012 is now done, and the talk Robert and I gave went well! We showed how we are using automata (FSAs and FSTs) to make great improvements throughout Lucene. You can view the slides here. Preview Text:  Lucene Revolution 2012 is now done, and the talk Robert and I gave went well! We showed how we are using automata (FSAs and...
• 6:30

  Web Development Frameworks: Play Framework 2.0

   » ‎ Java Zone - The heart of the Java developer community
  As the first candidate of our evaluation series we reviewed the Play Framework v2.0. The tutorial and reference documentation used for this article is all available from the Play documentation site. Preview Text:  If you are a Java developer (I infer it’s the same for Scala skilled devs) it’s really, really simple to get going with Play. It...
• 2:12

  How to create an API for users who don’t want to depend on your code?

   » ‎ Java Zone - The heart of the Java developer community
  First of all, how would you ever end up asking yourself that question? Well, if you’re the implementer of a class reloading system (e.g. www.javeleon.org) then this question makes perfect sense. Most users take advantage of the basic capabilities of Javeleon simply by adding a Java agent to the JVM arguments. Preview Text:  Ever wanted to avoid...

• May 15, 2012
• 21:08

  Developer Productivity Report 2012: Java Tools, Tech, Devs and Data

   » ‎ TheServerSide.com: News
  Fresh results from ZeroTurnaround's Developer Productivity Report 2012 - 30 pages of stats, analysis and interviews with industry experts.
  
  
  
• 21:08

  Optimal Application Performance and (Thread) Capacity Management via QoS for Apps

   » ‎ TheServerSide.com: News
  How to apply QoS techniques in the managing of application performance by way of service classification of workloads and associating such services with virtual resource capacity pools.
  
  
  

• 18:11

  Presentation: Glu-ing The Last Mile

   » ‎ InfoQ
  Ken Sipe introduces Glu, an open source deployment automation tool coming from LinkedIn, showing how to perform Glu configuration along with a demo of using it. By Ken Sipe
• 17:10

  Presentation: Deliver Early - There Is No Excuse!

   » ‎ InfoQ
  Jesper Boeg discusses why it is important to deliver software early, why it is difficult to do so, along with tools/tips/practices: shared vision, story maps, coaching, and others. By Jesper Boeg

• 16:53

  On Domain Modeling with Spring Data Neo4j

   » ‎ Java Zone - The heart of the Java developer community
  Hi all, Willie here. Last time I told you that I’m building the Skybase CMDB using Neo4j and Spring Data Neo4j, and I was excited to get a lot of positive feedback about that. I showed a little code but not that much. Preview Text:  This post describes how to build out the person configuration item in Skybase using Spring Data Neo4j. ...
• 16:14

  A Comprehensive Comparison of Windows Azure Blog Storage and Amazon Simple Storage Service (Part 2)

   » ‎ Java Zone - The heart of the Java developer community
  In part I of this blog post, we started comparing Windows Azure Blob Storage and Amazon Simple Storage Service (S3). We covered basic concepts and compared pricing and features of Blob Container and Buckets. You can read that blog post here. In this post, we’re going to compare Blobs and Objects from features point of view. Preview Text:  This...

• 16:09

  Presentation: High Availability at Heroku

   » ‎ InfoQ
  Mark McGranaghan presents how Heroku has designed, developed and operated cloud services providing high availability for their PaaS. By Mark McGranaghan

• 16:01

  ColdFusion 10 Released Today: New Features

   » ‎ Java Zone - The heart of the Java developer community
  Its out of beta and up for grabs...ColdFusion 10 has been released! (I make a small appearance in the intro video as well.)So what is ColdFusion 10? Lets start with looking at the new features.New FeaturesREST webservices Preview Text:  With the release of ColdFusion 10 today, we take a look at Sam Farmer's new feature rundown. Some of the...
• 15:57

  Video: Persistent Issues Around Cloud Adoption

   » ‎ Java Zone - The heart of the Java developer community
  CloudU Notebooks is a weekly blog series that explores topics from the CloudU certificate program in bite sized chunks, written by me, Ben Kepes, curator of CloudU. How-to’s, interviews with industry giants, and the occasional opinion piece are what you can expect to find. Preview Text:  Ben Kepes offers some insightful comments on the...
• 14:11

  My Brain Can’t Handle OOP Anymore

   » ‎ Java Zone - The heart of the Java developer community
  The other week I was working on my compilers homework – the semantic analysis part is an object-oriented nightmare. Something called the visitor pattern to traverse trees and do weird stuff. Preview Text:  In object-oriented programming everything gets muddled together. Functions are bundled with data, everything is codependent and there’s no...

• 14:00

  VMware's vFabric Suite Gains Automated Deployment and PostgreSQL Support

   » ‎ InfoQ
  VMware has today announced VMware vFabric Suite 5.1, adding automated deployment, enterprise open source support, and PostgreSQL capabilities, as well as an expansion to the SQLFire in-memory database. By Charles Humble

• 13:47

  SharePoint projects need software architecture too

   » ‎ Coding the Architecture

  I was reading Requirements–we don’t need them! by Andrew Woodward of 21apps recently, which talks about the importance of having a visionary product owner on your SharePoint project to ensure that it delivers the right thing. That all makes sense and it's inspired me to write this blog entry ... SharePoint projects also need a healthy dose of software architecture.

  If you're currently thinking "well, yes, duh!", that's awesome. Unfortunately, I've seen a number of SharePoint implementations where the basic tenets of software architecture have been forgotten or neglected. Here's a summary of why software architecture is important for SharePoint projects.

  1. Many SharePoint implementations aren't just SharePoint

  Many of the SharePoint solutions I've seen are not just simple implementations of the SharePoint product where end-users can create lists, share documents and collaborate. As with most software systems, they're a mix of new and legacy technologies, usually with complex integration points into other parts of the enterprise via web services and other integration techniques. Often, bespoke .NET code is also a part of the overall solution, either running inside or outside of SharePoint. If you don't take the "big picture" into account by understanding the environment and its constraints, there's a chance that you'll end up building the wrong thing or building something that doesn't work.

  2. Non-functional requirements still apply to SharePoint solutions

  Even if you're *not* writing any bespoke code as a part of your SharePoint solution, that doesn't mean you can ignore non-functional requirements. Performance, scalability, security, availability, disaster recovery, audit, monitoring, etc are all potentially applicable. I've seen SharePoint projects where the team has neglected to think about key non-functional requirements, even on public Internet-facing websites. As expected, the result was solutions that exhibited poor response times and/or severe security flaws (e.g. cross-site scripting). Often these issues were identified at a late stage in the (usually waterfall) project lifecycle.

  3. SharePoint projects are complex and require technical vision too

  Like any programming language, SharePoint is a complex platform and there are usually a number of different ways to solve a single problem. In order to get some consistency of approach and avoid chaos, SharePoint projects need strong technical leadership and the software architecture role is as applicable here as it is if you're writing a software system from scratch. If you've ever seen SharePoint projects where a seemingly chaotic team has eventually delivered something of a poor quality, you'll appreciate why this is important.

  4. SharePoint solutions still need to be documented

  With all of this complexity in place, I'm continually amazed to see SharePoint solutions that have no documentation. I'm not talking about hefty 200+ page documents here, but there should be at least *some* lightweight documentation that provides an overview of the solution. Some diagrams to show how the SharePoint solution works at a high-level are also useful, and something along these lines works well. Some *lightweight* documentation can be a great starting point for future support, maintenance and enhancement work; particularly if the project team changes or if the project is delivered under an outsourcing agreement.

  Strong leadership and discipline aren't just for software development projects

  If you're delivering software solutions then you need to make sure that you have at least one person undertaking the technical leadership role, looking after the things that I've highlighted above. If not, you're doing it wrong. As an aside, all of this applies to Microsoft Dynamics CRM projects too, especially if you're "just tacking on an Internet-facing ASP.NET website to expose CRM data via the Internet".

  I mentioned all of this to somebody a while back and they replied "but SharePoint isn't software development". Regardless of whether it is or isn't software development, successful SharePoint projects need strong technical leadership and discipline. SharePoint projects need software architecture.

• 13:36

  Start me up

   » ‎ new Blog( perso );
  La grande majorité d'entre nous travaille en SSII. Ces sociétés, il y en a de tous types, de toutes tailles, comme les missions qu'elles proposent, et il me semble que c'est un bon moyen pour se construire un bon bagage technique via la diversité des projets proposés. Evidemment, ça reste du service, donc l'engagement qu'on peut avoir sur un projet se limite à la durée de la mission.

• 13:27

  Sentiment Analysis using Apache Hive

   » ‎ Xebia Blog

  Apache Hive is a data warehouse system built on top of Hadoop. Using SQL-like language you can query data stored in the Hadoop filesystem (HDFS). Those queries are then translated into Map Reduce jobs and executed on your cluster.

  As an example we’ll analyze tweets from the Twitter Streaming logs and calculate the top 5 hashtags per day which are associated with positive sentiment signals (smileys).

  You can imagine how this can be expand this to simple sentiment analysis on your (potential) customer feedback.

  Gather the data from Twitter streaming API
  The JSON log lines from the Twitter Streaming API look like these:

      {
        "created_at": "Sat Sep 10 22:23:38 +0000 2011",
        "id_str": "112652479837110273",
        "text": "@twitter meets @seepicturely at #tcdisrupt cc.@boscomonkey @episod http://t.co/6J2EgYM",
        ...
        "user": {
          "name": "Eoin McMillan ",
          "screen_name": "imeoin",
          ...
        }
        ...
      }
  

  For now we only care about the “created_at” and “text” attributes. See detailed information on all available attributes at [https:]

  Import raw data into Hadoop & Hive
  Now from the Hive console import the logs into a Hive table.

  create table raw_tweets (json string);
  load data local inpath 'sample.json' into table raw_tweets;
  

  With Hadoop it is a best practice to always preserve the raw source data. It is pretty common that you detect obscure parse errors or missing information days later, keeping the source information allows you to correct this without much hassle.

  Parse JSON tweets and extract relevant information
  From this raw data, we parse and extract the actual information that we care about. Using the get_json_object function we can access the “text” and “created_at” attributes using an XPath like query on the JSON object. The timestamp needs to be converted into Unix epoch format for later formatting.

  create table tweets as
      select get_json_object(json, "$.text") as text,
             unix_timestamp(get_json_object(json, "$.created_at"),
                  "EEE MMM d HH:mm:ss Z yyyy") as ts_created
      from raw_tweets;
  

  Text parsing, extract hashtags and sentiment identification
  Now that we got the source data in a format we can deal with (text, timestamp), it is time to identify sentiment information. For this case, we’ll compose a regular expression that matches some positive smileys: and . Feel free to expand this to your taste. Also we split the text on whitespaces and identify terms which look like a #hashtag. These matching hashtags we emit together with the date in YYYY-MM-DD format allowing us to do daily aggregations afterwards.

  create table positive_hashtags_per_day as
      select from_unixtime(ts_created, 'yyyy-MM-dd') as dt,
          lower(hashtag) as hashtag from tweets
              lateral view explode(split(text, ' ')) b as hashtag
          where ts_created is not null
              and hashtag rlike "^#[a-zA-Z0-9]+$"
              and text rlike "^.*[;:]-?\).*$";
  

  Aggregate occurrences per day
  Aggregation is straight forward, just a matter of counting the occurrences per day. Now if you want to do multiple aggregations (per week, per month, etc), you might want to move the date string creation to this step.

  create table count_positive_hashtags_per_day as
      select dt, hashtag, count(*) as cnt from positive_hashtags_per_day
          group by dt, hashtag;
  

  Limit top 5 results per day using external reducer
  Finally we only want the top 5 results per day. Now this is a bit tricky in Hive, as this requires a user defined function or streaming reducer call. We do the latter using a little piece of Python code that only returns the first 5 results per keyword. Because the input to the reducer call is already secondary sorted on the count in descending order, this will return the top 5 results; just how we want it.

  add file topN.py;
  create table top5_positive_hashtags_per_day as
      reduce dt, hashtag, cnt
      using 'topN.py 5' as dt, hashtag, cnt
      from
      (select dt, hashtag, cnt from count_positive_hashtags_per_day
          distribute by dt sort by dt, cnt desc) cnts;
  

  The Python reduce code looks like this. Due to the way the Hadoop Streaming API works, you need to detect key boundaries yourself.

  #!/usr/bin/env python
  # Reducer that returns the top N results per keyword
  import sys
  
  maxN = int(sys.argv[1])
  last_key = None
  count = 0
  for line in sys.stdin:
      (key, value) = line.strip().split("t", 1)
      if key != last_key:
          count = 0
          last_key = key;
      if count < maxN:
          print "%st%s" % (key, value)
      count += 1
  

  Results
  The results of this exercise on my tiny sample set (can’t redistribute the source according to the Twitter TOS):

  hive> select * from top5_positive_hashtags_per_day;
OK
2011-02-25 #ff 8
2011-02-25 #happy 3
2011-02-25 #followfriday 2
2011-02-25 #teamzeeti 2
2011-02-25 #baensv 1

  2011-02-26 #db40birthday 5
  2011-02-26 #bieberfact 2
  2011-02-26 #teamfollowback 2
  2011-02-26 #feelingsoo 1
  2011-02-26 #aktf 1

  2011-02-27 #1 2
2011-02-27 #12 1
2011-02-27 #27f 1
2011-02-27 #dvdmeb 1
2011-02-27 #fail 1
Time taken: 4.231 seconds


  Follow Fridays make people happy… who would have thought

  Download the full code and Follow @mids106

  

• 9:00

  Agile france 2012 : 7 sessions by OCTO

   » ‎ OCTO talks !

  

  La conférence Agile France ouvrira ses portes au Chalet de la Porte Jaune les 24 et 25 mai. OCTO sera présent avec pas moins de sept sessions cette année.

  
  

  • Contrôlez vous ce que vous mesurez ? Thomas Lissajoux et Jonathan Scher : faut-il mesurer ce qu’on veut améliorer ? Vous mesurez certainement la vélocité ou les coûts de vos projets, mais à part ça ? Et que se passerait-il si ces données étaient ouvertes et publiques ?
  • eXtreme Quotation : le planning poker sous stéroïdes Jonathan Scher et Guillaume Duquesnay : apprenez à estimer 90 stories en moins de 20 minutes, sans perdre en confiance par rapport à un planning poker.
  • Des codeuses dans votre équipe ? Guillaume Duquesnay : pourquoi y a-t-il si peu de développeuses dans nos DSI ? Que gagnerait votre équipe en y remédiant ?
  • Des outils de coaching pour améliorer la dynamique de votre équipe Jean-François Hélie et Guillaume Duquesnay : un gros projet en situation critique. Un virage vers l’agile réussi. Les outils de coaching qui ont permis à l’équipe de prendre ses responsabilités et s’auto-organiser.
  • Agile sur un projet court : êtes vous prêts ? Guillaume Duquesnay et Jonathan Scher : sur un projet de moins de 2 mois, pas le temps de laisser les choses se tasser. Les règles du jeu pour réussir un projet court en agile.
  • Entre Technical Leaders : Comment faire un Dojo ? Guillaume Duquesnay et Frederic Merizen : un cercle de pratiques : partageons nos expériences, écrivons ensemble le guide d’un coding dojo réussi.
  • Retour d’expérience sur un projet Agile à large échelle Mathieu Despriee et Hervé Lourdin : un projet : 80 personnes sur 9 équipes dans 4 pays. Oui, l’agilité fonctionne pour les gros projets. Voici comment.

  Nous suivrons avec intérêt les autres sessions. Quelques highlights :

  • Le manager agile : Hors de la zone de confort par Gabriel Le Van
  • Mon binôme m’a tuer par Jonathan Perret et Emmanuel Gaillot
  • The recent evolution of consumer products par Régis Medina
  • Retour d’expérience : Agile contre Cycle en V : Le match par Étienne Charignon

  Vous voulez parler d’agilité ? Venez nous rencontrer à Agile France les 24 et 25 mai prochains, les Octos seront présents.

  

  Suggestion d'articles :

  1. Octo présente cinq sessions dans le cadre de la conférence Agile France
  2. Interview des orateurs OCTO pour la conférence Agile France
  3. Octo soutient : Agile Open France 2009

• 8:00

  Java technology zone technical podcast series: Season 4

   » ‎ developerWorks : Build your own feed : Articles for Java
  For years, the Java zone has brought you top-quality technical content by some of the best minds in the industry. But taking the time to read an in-depth, code-heavy article can be difficult, even if it's about a topic that's critical to your day job. This podcast series, led by the engaging and technically curious Andrew Glover, provides a new way to get information from the sources you trust most. Every few weeks, we'll publish a new discussion with an expert on the topics that are important to your job.
• 8:00

  Functional thinking: Functional design patterns, Part 3

   » ‎ developerWorks : Build your own feed : Articles for Java
  The Gang of Four's Interpreter design pattern encourages extending a language by building a new language from it. Most functional languages let you extend the language in a variety of ways, such as operator overloading and pattern matching. Although Java doesn't permit any of these techniques, next-generation JVM languages do, with varying implementation details. In this article, Neal Ford investigates how Groovy, Scala, and Clojure realize the intent of the Interpreter design pattern by allowing functional extensions in ways that Java does not.

• 7:59

  Codifying DevOps

   » ‎ Java Zone - The heart of the Java developer community
  While working on the Devops Cookbook with my fellow authors Gene Kim,John Willis,Mike Orzen we are gathering a lot of "devops" practices. For some time we struggled with structuring them in the book. I figured we were missing a mental model to relate the practices/stories to. Preview Text:  This blogpost is a first stab at providing a...
• 7:28

  Scala For The Impatient

   » ‎ Java Zone - The heart of the Java developer community
  ISBN or ASIN:  0321774094 Book Author(s):  Cay S Horstmann Publisher:  Addison-Wesley Publication Date:  March 2012 Rating ...

• 7:00

  Comic for May 15, 2012

   » ‎ Dilbert Daily Strip
  

  
  

  

• 6:56

  Beginners Guide: Improving Search Indexes for Better Performance

   » ‎ Java Zone - The heart of the Java developer community
  As you know one of the most important Preview Text:  As you know one of the most important techniques when designing your database schema or your searching enabled systems is the selection and creation of indexes for increasing the performance of your various queries. What you may not know is why and how indexes help. ...
• 6:56

  ActiveMQ and ServiceMix Achive New

   » ‎ Java Zone - The heart of the Java developer community
  Looks like after around a month of public beta, Fuse ESB Enterprise and Fuse MQ 7.0 have both been made generally available today according to a new announcement out of the CamelOne Conference.Here are some relevant features out of the news release along with some resources that should be helpful to anyone interested in using Apache tools for integration: Preview Text:  ...
• 6:51

  Solving OutOfMemoryErrors - APM tools as a solution?

   » ‎ Java Zone - The heart of the Java developer community
  Our series of posts about solving the OutOfMemoryError in our hypothetical production system nearing the conclusion. Preview Text:  APM solutions are positioned as the Holy Grails on the quest for solving your production environment’s performance problems. You just setup an APM tool of your choice, let it monitor your whole cluster from...
• 6:48

  Performance: Caching Per Request

   » ‎ Java Zone - The heart of the Java developer community
  A couple of years ago I wrote a post describing an approach my then colleague Christian Blunden used to help improve the performance of an application where you try to do expensive things less or find another way to do them. On the application I’m currently working on we load reference data from an Oracle database into memory based on configurations provided by the user. Preview...
• 6:38

  Choosing a Web Development Framework: Options and Criteria

   » ‎ Java Zone - The heart of the Java developer community
  At my company we are evaluating which web development framework we will use for the next few years. Since our last evaluation we have been using Java application servers powered by Struts 2 as MVC, Tiles as templating engine, jQuery for Javascript awesomennes, DWR for AJAX calls and MyBatis as ORM. But we think it’s time to re-evaluate and move on to a newer/better/friendlier framework. ...
• 6:34

  Beautiful Code: Simplicity Yields Power

   » ‎ Java Zone - The heart of the Java developer community
  In Simple Made Easy argues Rich Hickey that mixing orthogonal concerns introduces unnecessary complexity and that we should keep them separate. This mixing sometimes occurs on such a basic level that we believe that there is no other way to do it, an example being the interleaving of polymorphism and hierarchical namespacing represented by OO class hierarchies. Preview Text:  ...