|[wtp-dev] Mixing spec levels in EAR. Opinions?|
Hello, I want to bring up again an issue that was discussed some time ago in Bugzilla. It is about mixing of spec levels of EAR and included modules. There are two bugs related: https://bugs.eclipse.org/bugs/show_bug.cgi?id=220929 https://bugs.eclipse.org/bugs/show_bug.cgi?id=229893 Everybody agree that EAR with spec level X could include modules with spec level X or lower. Example: EAR 5 can include EJB 2.1. But there is no consensus of opinion on EAR with spec level X to include modules with spec level higher than X. Example: EAR 1.4 to include EJB 3.0. There are two contrary opinions: 1. EAR 1.4 can include EJB 3.0 2. EAR 1.4 cannot include EJB 3.0. The supporters of opinion 1 says that it is not forbidden by the Java EE spec. The supporters of opinion 2 says that it is (at least indirectly) forbidden by the spec. This is because the contract of the Java EE spec says that a deployment module compliant with spec level X must always be able to deploy on an application server compliant with spec level X. Now let's look again at our example of EAR 1.4 including EJB 3.0. EAR 1.4 is a J2EE 1.4 deployment module and it is guaranteed by the spec that it will deploy on all J2EE 1.4 compliant servers. But if we try to deploy it on an J2EE 1.4 compliant app server, that is not at the same time Java EE 5 compliant, then our deployment will fail, because of the included EJB 3.0 module (which is Java EE 5 spec level). At the moment there is an inconsistency in several dialogs in WTP regarding this issue. For example the Java EE Module Dependencies property page of an EAR 1.4 project filters Java EE 5 modules for selection, while at the same time the project creation wizard allows a EJB 3.0 project to be added to an existing EAR 1.4 project. I suggest that we discuss this problem and hope we will have an agreement for WTP 3.0.1. I invite all application server vendors represented in this mailing list to express their support for either opinion 1 or opinion 2. Greetings, Kaloyan Raev Eclipse WTP Committer <http://www.eclipse.org/webtools/people/person.php?name=raev> Senior Developer NW C JS TOOLS JEE (BG) SAP Labs Bulgaria T +359/2/9157-416 mailto:kaloyan.raev@xxxxxxx www.sap.com P Save a tree - please do not print this email unless you really need to!
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