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Created May 10, 2017 12:32
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dwamara commented May 29, 2017

Not a question but maybe an answer to @mehdithe as I normally use Wildfly in production.

  • make sure you have add the driver library as a module to your wildfly.
  • Then you can define something like this in your standalone.xml
    <datasource jndi-name="java:/jdbc/inzo24-is24-ds" pool-name="inzo24-datasource" enabled="true" statistics-enabled="true"> <connection-url>YOUR_JDBC_URL</connection-url> <driver>mysql</driver> <security> <user-name>YOUR_USERNAME</user-name> <password>YOUR_PASSWORD</password> </security> <validation> <valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker"/> <background-validation>true</background-validation> <exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter"/> </validation> </datasource>
    for this I had for the driver definition
    <driver name="mysql" module="com.mysql"> <driver-class>com.mysql.jdbc.Driver</driver-class> </driver>
    In your persistence.xml
    <persistence-unit name="finance-prod" transaction-type="JTA"> <jta-data-source>java:/jdbc/inzo24-is24-ds</jta-data-source> <class></class> <class></class> <class></class> <properties> </properties> </persistence-unit>
    Then you can inject the entity manager with @PersistenceContext(unitName = "finance-prod") public EntityManager em;

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dwamara commented May 30, 2017

Now my question :)
Hi Adam, I wanted to know what is your take on using technologies like Wildfly Swarm or SpringBoot. I kind of love the way one can make a runnable Jar that contains the whole service and a container but I really dislike the way one ends up. with a bloated file: I wanted to test how they work and with a 750 KB war that I had for my service, I ended up with a 50+MB file. My actual VPS doesn't support Docker so I can't use containers as I would like so I end up working with "normal" application servers deployed on the system, and I was looking on trying to leverage the use of Swarm or Boot but after seeing the size of the runnable file I'm not really bought into it.


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problemzebra commented May 31, 2017

Hi Adam,

what are your experiences with the Java EE Batch API (JSR 352), especially JBeret (the JSR 352 implementation in JBoss EAP/Wildfly) concerning

  • Monitoring
  • Clustering
  • Scheduling (EJB timer or ScheduledExecutorService?)?
  • Resilience (what happens if a job connects to a e.g. mail server but for some reason the job runs forever because a timeout is not working?)

A typical job in our application is: (a) reading a file from imap/folder/ftp/database/… (b) doing some processing like validation, transformation, … (c) writing a file to smtp/folder/ftp/database….

Are there any established alternatives to JSR 352? When would you recommend to build a own job framework?

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sebargarcia commented Jun 2, 2017

Hi Adam,
Is there a way tu use eclipselink @Multitenant in CMT (container managed transactions)?
I use JPA (eclipselink implementation) in Payara and in my webapp I need tu use multitenant. What I see is that there are nothing standard in JPA but eclipseLink have @Multitenant. My problem is that for what i see you can only use @Multitenant in BMT (bean managed transaction) thats mean I can not inject the entityManager (
@PersistenceContext(unitName = "myPU") private EntityManager em;
and set the tenant dynamically.
what are your strategy tu develop multitenant app?

oh and for @mehdithe Antnios´s blog had a good entry about JWT and jax-rs:


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dempile commented Jun 4, 2017

Hi Adam,
I want to create a project with multiple java ee modules packaged in war files connected with each other with rest webservices, these wars are deployed in the same payara appserver and sharing a single database.
Is this kind of architecture suitable to build a project with large amount of data, and is having a unique database can cause performance problems ?

In you opitnion what can be the architecture to build a JEE application with different business modules sharing data between them

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Hi Adam, did you have any experience programming an scheduled MDB ?? Could you sho us an example?


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