[jbosstools-issues] [JBoss JIRA] (JBTIS-475) Build of Drools/jBPM tools for Eclipse Mars fails with Java 7

[Petr Široký (JIRA)]

    [ https://issues.jboss.org/browse/JBTIS-475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13100516#comment-13100516 ] 

Petr Široký commented on JBTIS-475:
-----------------------------------

In ideal case we (Droolsj+jBPM) would still be building with JDK 6, since that is the minimal version we need to support. We are using JDK7 simply because some of the GWT related artifacts need (note this is not an issue, because those GWT deps get translated to javascript and will never appear on server classpath). 

Switching from JDK 7 to JDK8 is not as trivial as everyone things. There are differences between those two and from my experience it would be non-trivial to migrate every our project to build with JDK 8 (for one, some plugin versions we use don't support JDK8). In future we will need to do that, but now is not the time.

I am guessing that the only way to solve this is to build only droolsjbpm-tools repo with JDK8 (and rest of the repos with JDK7). [~bbrodt] this means the Drools+jBPM Eclipse tooling will never run on anything older than the Mars (JBDS 9), but looks like that is what we want basically.

> Build of Drools/jBPM tools for Eclipse Mars fails with Java 7
> -------------------------------------------------------------
>
>                 Key: JBTIS-475
>                 URL: https://issues.jboss.org/browse/JBTIS-475
>             Project: JBoss Tools Integration Stack
>          Issue Type: Bug
>          Components: drools/ jBPM
>    Affects Versions: 4.3.0.Beta1f-TP
>            Reporter: Robert (Bob) Brodt
>            Assignee: Paul Leacu
>
> Drools/jBPM requires building with Java 7, while apparently the Mars JBTIS requires a Java 8 runtime. This is causing a problem in the tycho surefire plugin when I try to build the droolsjbpm-tools project against the Mars JBTIS (currently 4.3.0.Beta1e)



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