Serge Pagop's Weblog http://www.innoq.com/blog/sp/ en Copyright 2008 Thu, 20 Mar 2008 00:47:46 +0100 http://www.sixapart.com/movabletype/ http://blogs.law.harvard.edu/tech/rss Is JBoss 4.2.x AS Java EE 5 compatible? NO”. Because some people ask me this question all the time, I think now is the time to make some explanations concerning that issue. “The new planned JBoss Application Server 5 will support the entire Java EE 5 specification.” JBoss 4.2.X implemented EJB 3.0 functionality by the way of EJB MBean Container. That means it runs as plugim in the APPServer. As a consequence of the EJB 3.0 plugin integration, JBoss 4.2.X supports injection of @EJB references and EntityManager between different EJB components and this support is limited only to the EJB 3.0 MBeam and the JAR files. Any reference of @EJB into a WAR (with servlets and JSF) can’t be released in JBoss 4.2.X AS. I hope the information was helpful. ]]> http://www.innoq.com/blog/sp/2008/03/is_jboss_42x_as_java_ee_5_comp.html http://www.innoq.com/blog/sp/2008/03/is_jboss_42x_as_java_ee_5_comp.html Thu, 20 Mar 2008 00:47:46 +0100 JBoss AS 4.2.x and java.lang.OutOfMemoryError: PermGen space java.lang.OutOfMemoryError: : PermGen space . to fix that problem, we have to patch the $JBOSS_HOME/bin/run.sh file with this proposition: - firstly, we have to find the variable JAVA_OPTS in the file - then we have to enhance the variable like this: 
 JAVA_OPTS="$JAVA_OPTS -Xms128m -Xmx512m -XX:CMSPermGenSweep:ngEnabled
 -XX:MaxPermSize=128m -Dsun.rmi.dgc.client.gcInterval=3600000 
-Dsun.rmi.dgc.server.gcInterval=3600000 -Djava.net.preferIPv4Stack=true"
The PermGenSpace of a JBoss AS instance has a standard value of 64m, therefore breaks down often the server instance.]]> http://www.innoq.com/blog/sp/2008/01/jboss_as_42x_and_javalangoutof.html http://www.innoq.com/blog/sp/2008/01/jboss_as_42x_and_javalangoutof.html Mon, 28 Jan 2008 14:28:25 +0100 $8.5 Billion to buy the big cake BEA Systems Oracle to buy the big cake BEA Systems for $8.5 Billion]]> http://www.innoq.com/blog/sp/2008/01/85_billion_to_buy_the_big_cake.html http://www.innoq.com/blog/sp/2008/01/85_billion_to_buy_the_big_cake.html Mon, 21 Jan 2008 12:19:10 +0100 Geronimo is now Java EE 5 compatible Apache Geronimo project with the latest release candidate (2.0-M6-rc1) has passed all tests in the Java Enterprise Edition 5.0 Compatibility Test Suite. Summarized, we can say that, it is the first open source application server other than Glassfish to pass the tests.
To conver some Java EE functionalities, this version use projects such as:
  • ActiveMQ
  • Axis
  • CXF
  • MyFaces
  • OpenJPA
]]> http://www.innoq.com/blog/sp/2007/06/geronimo_is_now_java_ee_5_comp.html http://www.innoq.com/blog/sp/2007/06/geronimo_is_now_java_ee_5_comp.html Thu, 14 Jun 2007 11:40:06 +0100 XMLType with TopLink-essentials JPA http://www.oracle.com/technology/products/ias/toplink/doc/10131/main/_html/relmapun002.htm#sthref3777 It should be possible to build an converter in TopLink Essentials that can handle at least basic reading and writing (more complex queries will still require using native SQL). Configuring a mapping to use a converter is an extension of the actual JPA specification and would require using a descriptor Customizer. There is a description in the link below. http://www.oracle.com/technology/products/ias/toplink/jpa/resources/toplink-jpa-extensions.html#TopLinkCustomizationValidation Hopefully, this can help you.]]> http://www.innoq.com/blog/sp/2007/04/xmltype_with_toplinkessentials.html http://www.innoq.com/blog/sp/2007/04/xmltype_with_toplinkessentials.html Mon, 30 Apr 2007 18:05:33 +0100 Make the different between TopLink Essentials JPA and Oracle TopLink product (10.1.3) TopLink Essentials are the reference implementation (RI) of JPA, is an open source effort that is licensed under the Common Development and Distribution License (CDDL) v1.0. It can be freely downloaded and used under the terms of this license agreement. This means, you can only use it for the management of persistence and orm with Java EE and Java SE. The binary distribution of TopLink consist of 2 jars:
  • toplink-essentials-agent.jar: contains Java Persistence API; XML Schemas and TopLink essentials implementation
  • toplink-essentials.jar: contains java agent class requires in a standolane Java SE application

In addition to TopLink Essentials that makes the JPA implementation alive, Oracle offers its Oracle TopLink product (10.1.3) that contains an earlier preview binary of JPA and also offers developers additional object-relational capabilities, object-XML mapping (JAXB), non-relational mapping using Java 2.0 Connector Architecture (JCA).

]]> http://www.innoq.com/blog/sp/2007/04/make_the_different_between_top.html http://www.innoq.com/blog/sp/2007/04/make_the_different_between_top.html Mon, 30 Apr 2007 11:54:17 +0100 JEE Developers have to learn Java EE Class Loading architecture of their AppServer presentation by infoQ some views of Java EE Class Loading Architectures and makes the difference between architectures Class Loading in some AppServers like JBoss AS 4.0.2, Sun's Appserver 9, BEA WebLogic 9.1. I found this presentation useful and interesting.]]> http://www.innoq.com/blog/sp/2007/04/java_ee_developer_have_to_lear.html http://www.innoq.com/blog/sp/2007/04/java_ee_developer_have_to_lear.html Sun, 15 Apr 2007 20:20:59 +0100 Speed up your Web-App development with the EJB 3.0 and JPA Pinaki Poddar's blog you can learn how the EJB 3.0 and JPA programming model can reduce and simplify some tasks in the development of Web Applications. ]]> http://www.innoq.com/blog/sp/2007/04/speed_up_your_webapp_developme.html http://www.innoq.com/blog/sp/2007/04/speed_up_your_webapp_developme.html Thu, 05 Apr 2007 20:57:10 +0100 Die Java Persistence API JavaSPEKTRUM edition. I wrote this article with Phillip Ghadir and Oliver Tigges and the article describes some important aspects about Java Persistence API (JPA) .]]> http://www.innoq.com/blog/sp/2007/03/die_java_persistence_api.html http://www.innoq.com/blog/sp/2007/03/die_java_persistence_api.html Fri, 23 Mar 2007 17:32:35 +0100 EJB 3.0 Spec. with WebLogic Server 10.0 OpenJPA with the Apache License plays a important role as a default JPA persistence provider. If you want to more about the new release, check this site from edocs.bea.com ]]> http://www.innoq.com/blog/sp/2007/02/ejb_30_spec_in_weblogic_server.html http://www.innoq.com/blog/sp/2007/02/ejb_30_spec_in_weblogic_server.html Mon, 12 Feb 2007 20:02:03 +0100 What is Java Persistence API (JPA)? http://jcp.org/aboutJava/communityprocess/final/jsr220/index.html https://glassfish.dev.java.net/javaee5/docs/DocsIndex.html http://www.hibernate.org/397.html http://www.eclipse.org/dali http://schuchert.wikispaces.com/EJB+3+and+Java+Persistence+API http://www.oracle.com/technology/pub/articles/gupta-jpa.html http://static.springframework.org/spring/docs/2.0.x/reference/orm.html#orm-jpa http://e-docs.bea.com/kodo/docs40/full/html/ejb3_overview.html http://incubator.apache.org/openjpa/docs/latest/manual/manual.html#jpa_overview_why ]]> http://www.innoq.com/blog/sp/2007/02/what_is_java_persistence_api_j_1.html http://www.innoq.com/blog/sp/2007/02/what_is_java_persistence_api_j_1.html Sat, 03 Feb 2007 10:57:13 +0100