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Frits Walraven

Creator of Enthuware JWS+ V6
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since Apr 07, 2010
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Recent posts by Frits Walraven



T h e . C o d e R a n c h . J o u r n a l  -  J u l y . 2 0 2 0 . E d i t i o n

A big howdy from all the CodeRanch staff, and welcome to the July edition of the CodeRanch Journal.


I n t e r e s t i n g . C o d e R a n c h . F o r u m . P o s t s
Here's some threads from this month that are worth giving a read:
  • Sorting an array question?
  • Which most essential part in mathematics should every programmers know?
  • Proper code format with if/else
  • Simplifying Boolean & Int
  • Referring to a specific object
  • Writing notes before actual coding?

  • Thanks to bryant rob, Houssam El, Corey Smith and Dan Bromberg for starting these topics and everyone else that joined in for the discussions.


    B o o k . P r o m o t i o n s
    There's a book (or software) promotion just about every week at CodeRanch. Just ask a question in the appropriate forum and you're eligible to win a copy of the book (or license).  Check the book promotions schedule

    Upcoming promotions in August:
  • Five Lines of Code (August 4th)
  •       Christian Clausen
          Teaches working developers the shortcuts to quality code. There’s
          no jargon or tricky automated-testing skills required, just easy
          guidelines and patterns illustrated by detailed code samples.

  • Testing JavaScript Applications (August 11th)
  •       Lucas da Costa
          A guide to creating JavaScript tests that are targeted to your
          application’s specific needs. All examples are delivered using the
          popular testing tool Jest and modern packages of the JavaScript
          ecosystem.

  • Serverless Machine Learning in Action (August 18th)
  •       Carl Osipov
          Bring your experimental machine learning code to production using
          serverless capabilities from major cloud providers. When you’re
          done, you’ll have the tools to easily bridge the gap between ML
          models and a fully functioning production system.

  • Spring in Action (August 25th)
  •       Craig Walls
          This book guides you through Spring’s core features explained in
          Craig Walls’ famously clear style. Topics include reactive
          programming, microservices, service discovery, RESTful APIs,
          deployment, and expert best practices.


    This month's book promotion winners:
  • 97 Things Every Java Programmer Should Know
  •       Winners: meenakshi sundar, DineshC Sharma, paul nisset and Pedro Struck
  • AWS Security
  •       Winners: Julian Isaac, Lucian Maly, Skumar Patel and Al Razor
  • Learn Kubernetes in a Month of Lunches
  •       Winners: Greg Horie, Miguel Leiva, Lucian Maly and Tim Holloway
  • Spark in Action
  •       Winners: Sharma Ashutosh, Campbell Ritchie and Will Myers

    And a big Congratulations to our past Winners


    T h e . M o o s e . i s . L o o s e . o n . S o c i a l . M e d i a
    The CodeRanch announces latest news/developments frequently on our social media outlets. You can find us at:
  • https://twitter.com/coderanch
  • https://www.facebook.com/coderanch

  • Follow / Like us so you don't miss a thing.


    O u r . S t a f f
    Thanks to all staff that volunteer their time and share their knowledge to make this site the friendliest place on the web to learn.  A special thanks this month to the following members ...
  • Marshals: Campbell Ritchie · Bear Bibeault · Ron McLeod · Jeanne Boyarsky · Paul Clapham
  • Sheriffs: Tim Cooke · Liutauras Vilda · Junilu Lacar
  • Saloon Keepers: Tim Moores · Stephan van Hulst · Tim Holloway · fred rosenberger · salvin francis
  • Bartenders: Piet Souris · Frits Walraven · Carey Brown



  • A b o u t . T h e . E d i t o r
    Ron McLeod has been a member of CodeRanch since 2013 and a Moderator since 2015.


    J o u r n a l . A r c h i v e
    Our previously published journals are available online at: JavaRanch Journal
    1 month ago
    Congratulations Olivia    
    and to the proud parents  
    2 months ago
    You can't mix different stategies in the same class hierarchy.
    Again, everything looks normal to me.

    There are two things you can still consider.

    1) remove the glassfish-ejb-jar.xml completely and use the EE-compliant way of injecting a resource (glassfish-ejb-jar.xml and the mappedName attribute are propriety)

    2) move the contents of the glassfish-ejb-jar.xml into an ejb-jar.xml (conform the EJB-specs)
    and how does the resource-ref look like in your GLASSFISH_HOME/glassfish/domains/domain1/config/domain.xml ?
    When I have this kind of strange errors I normally inspect the ear, war or ejb file to check what is really deployed to the server.
    that looks perfectly normal to me....

    My best guess is that it ignores/doesn't see the glassfish-ejb-jar.xml deployment descriptor. By using the mappedName in the resource annotation you get it working because that points to the global jndi.
    I am not completely aware how glassfish exactly works with the resource references but did you add the <resource-ref> element to your <ejb> element in the glassfish-ejb-jar.xml ?
    I use JPA (in a JEE Application server) all the time in my work environment. Will this workbook still be helpful for me?
    Congratulations Michael Mutek,

    Your question has made it to our Journal

    Have a Cow!
    2 months ago
    Congratulations D.J. Quavern,

    Your question has made it to our Journal

    Have a Cow!
    2 months ago
    Congratulations Francis Oswald,

    Your question has made it to our Journal

    Have a Cow!
    2 months ago
    T h e . C o d e R a n c h . J o u r n a l - J u n e . 2 0 2 0 . E d i t i o n

    Howdy from all the CodeRanch staff, and welcome to the June edition of the Journal.

    N e w s . F r o m . O u r . T r a i l . B o s s !


    Have you all read about Paul Wheaton's new project:

    * A story of a new frontier in greenhouse design: a greenhouse that stays warm through a Montana winter with zero electricity or fuel

    W h a t ' s . N e w?



    * Please welcome our newest Rancher: Zachary Griggs

    * Please welcome our newest Sheriff: Ron McLeod

    I n t e r e s t i n g . C o d e R a n c h . F o r u m . P o s t s


    * Random sequence

    * junit test with a stream

    * How can I store deserialized objects in a List?

    * Java EE 6 master certification is set to retire on August 30th 2020

    B o o k . P r o m o t i o n s



    There's a book (or software) promotion just about every week at CodeRanch. Just ask a question in the appropriate forum and you're eligible to win a copy of the book.
    We've got some promotions coming up. Check the book promo schedule.

    Our recent book promotions and their winners can be found below:

    * Winners: Modern Programming Made Easy: Using Java, Scala, Groovy, and JavaScript

    * Winners: Pivotal Certified Professional Core Spring 5 Developer Exam: A Study Guide Using Spring

    * Winners: The Definitive Guide to Modern Java Clients with JavaFX: Cross-Platform Mobile and Cloud

    * Winners: Succeeding with AI. How to make AI work for your business.

    Some upcoming ones are:

    * JDBC Workbook

    * A Day in Code

    * 97 Things Every Java Programmer Should Know

    * AWS Security

    * Learn Kubernetes in a Month of Lunches

    * Spark in Action  

    B o o k . R e v i e w s


    We have a dedicated forum for book reviews.

    Please check out the latest reviews (also available on our book review grid: Book-Review-Grid)

    T h e . M o o s e . o n . S o c i a l


    The CodeRanch announces latest news/developments frequently on our social media outlets. You can find us at:

  • Twitter - https://twitter.com/coderanch
  • Facebook - https://www.facebook.com/coderanch

  • Follow / Like us so you don't miss a thing.


    A b o u t . T h e . E d i t o r



    Frits Walraven has been a member of CodeRanch since 2010 and a Bartender since 2013.

    S u g g e s t i o n s / F e e d b a c k


    If you have any feedback on this month's journal then feel free to create a topic in our Ranch-Office

    J o u r n a l . A r c h i v e


    Our previously published journals are available online at Java-Ranch-Journal
    2 months ago
    T h e . C o d e R a n c h . J o u r n a l - J u n e . 2 0 2 0 . E d i t i o n

    Howdy from all the CodeRanch staff, and welcome to the June edition of the Journal.

    N e w s . F r o m . O u r . T r a i l . B o s s !


    Have you all read about Paul Wheaton's new project:

    * A story of a new frontier in greenhouse design: a greenhouse that stays warm through a Montana winter with zero electricity or fuel

    W h a t ' s . N e w?



    * Please welcome our newest Rancher: Zachary Griggs

    * Please welcome our newest Sheriff: Ron McLeod

    I n t e r e s t i n g . C o d e R a n c h . F o r u m . P o s t s


    * Random sequence

    * junit test with a stream

    * How can I store deserialized objects in a List?

    * Java EE 6 master certification is set to retire on August 30th 2020

    B o o k . P r o m o t i o n s



    There's a book (or software) promotion just about every week at CodeRanch. Just ask a question in the appropriate forum and you're eligible to win a copy of the book.
    We've got some promotions coming up. Check the book promo schedule.

    Our recent book promotions and their winners can be found below:

    * Winners: Modern Programming Made Easy: Using Java, Scala, Groovy, and JavaScript

    * Winners: Pivotal Certified Professional Core Spring 5 Developer Exam: A Study Guide Using Spring

    * Winners: The Definitive Guide to Modern Java Clients with JavaFX: Cross-Platform Mobile and Cloud

    * Winners: Succeeding with AI. How to make AI work for your business.

    Some upcoming ones are:

    * JDBC Workbook

    * A Day in Code

    * 97 Things Every Java Programmer Should Know

    * AWS Security

    * Learn Kubernetes in a Month of Lunches

    * Spark in Action  

    B o o k . R e v i e w s


    We have a dedicated forum for book reviews.

    Please check out the latest reviews (also available on our book review grid: Book-Review-Grid)

    T h e . M o o s e . o n . S o c i a l


    The CodeRanch announces latest news/developments frequently on our social media outlets. You can find us at:

  • Twitter - https://twitter.com/coderanch
  • Facebook - https://www.facebook.com/coderanch

  • Follow / Like us so you don't miss a thing.


    A b o u t . T h e . E d i t o r



    Frits Walraven has been a member of CodeRanch since 2010 and a Bartender since 2013.

    S u g g e s t i o n s / F e e d b a c k


    If you have any feedback on this month's journal then feel free to create a topic in our Ranch-Office

    J o u r n a l . A r c h i v e


    Our previously published journals are available online at Java-Ranch-Journal
    2 months ago