[jboss-jira] [JBoss JIRA] Closed: (EJBTHREE-1029) Invoke remote EJB3 from JVM 1.4 client

Invoke remote EJB3 from JVM 1.4 client -------------------------------------- Key: EJBTHREE-1029 URL: http://jira.jboss.com/jira/browse/EJBTHREE-1029 Project: EJB 3.0 Issue Type: Patch Environment: Server : JDK 1.5.0_10, JBoss 4.0.3SP1 + EJB3 jars (RC6), EJB 3 Session Stateless Client : JDK 1.4.2 Reporter: Boris Maras Attachments: build-client1.4convert.xml, jboss-ejb3-client14.jar, patch build.xml ejb3-client1.4.txt Natively, you cannot use a JVM 1.4 client to call JBoss EJB3. This is because the jboss-ejb3.jar is compiled with JDK 1.5 : using it in a 1.4 JVM gives errors on major/minor version. So I used jbossretro to convert this jar in jdk 1.4 compatible format. That gave me a jar that works in my jvm 1.4 client (see attached file, to be used with JBoss 4.0.3SP1 + EJB3 RC6) In order to use it, you also need to create a client jar for your EJBs, compiled with a 1.4 target. At compile time, you'll probably need to remove some annotations (@Local, @Remote etc). Thus, you need on the client side : - the client jar for your EJBs - the generated jboss-ejb3-client14.jar - jbossretro-rt.jar - jboss-backport-concurrent.jar - javassist.jar I tested that on JBoss 4.0.3SP1+EJB3 RC6, with Session Stateless Beans only. I attach a patch for the current version of ejb3/build.xml, that generates the jboss-ejb3-client14.jar for the current version. I could not test this version, because I only use JBoss 4.0.3SP1, that doesn't support it. I also attach the jboss-ejb3-client14.jar that works with EJB3 RC6 and JBoss 4.0.3SP1. I generated it with another ant script (also attached), that does this : - uncompress the file jboss-ejb3.jar - delete all files that are not included in jboss-ejb3-client.jar (based on the list of current ejb3/build.xml) - run jbossretro on the classes, using the jboss 4.0.3SP1 libraries on the classpath - recompress the jar This ant script should probably let you convert the jar of other versions of JBoss & EJB3.