[jira] [Comment Edited] (JENA-1729) A minor initilization issue

["ssz (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16880243#comment-16880243 ] 

ssz edited comment on JENA-1729 at 7/9/19 11:12 AM:
----------------------------------------------------

In my case (the project [avicomp/ont-map|https://github.com/avicomp/ont-map]) I use Jena initialization subsystem to load library graphs from system resources in order to have them as some kind of singleton: they are used widely in API, which is desired to be fast as possible. Maybe yes, loading graphs while initialization is not very good idea, and I have to think to change it somehow. But for me this is a minor issue, and here is mostly for the record; the appropriate way to use the api implies explicit calling `JenaSystem.init()`


was (Author: szz):
In my case (the project https://github.com/avicomp/ont-map) I use Jena initialization subsystem to load library graphs from system resources in order to have them as some kind of singleton: they are used widely in API, which is desired to be fast as possible. Maybe yes, loading graphs while initialization is not very good idea, and I have to think to change it somehow. For me this is a minor issue, and here is mostly for the record; the appropriate way to use the api implies explicit calling `JenaSystem.init()`

> A minor initilization issue
> ---------------------------
>
>                 Key: JENA-1729
>                 URL: https://issues.apache.org/jira/browse/JENA-1729
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Core
>         Environment: java8(1.8.0_152), jena-arq:3.12.0
>            Reporter: ssz
>            Priority: Minor
>             Fix For: Jena 3.12.0
>
>
> The following one-class program fails with assertion error:
>  
> {code:java}
> package xx.yy;
> import org.apache.jena.rdf.model.RDFNode;
> import org.apache.jena.rdf.model.ResourceFactory;
> import org.apache.jena.sys.JenaSubsystemLifecycle;
> import org.apache.jena.sys.JenaSystem;
> import org.apache.jena.vocabulary.RDF;
> public class InitTest implements JenaSubsystemLifecycle {
>     @Override
>     public void start() {
>         if (JenaSystem.DEBUG_INIT)
>             System.err.println("InitTEST -- start");
>         assert RDF.type != null : "RDF#type is null => attempt to load a graph here will fail";
>     }
>     @Override
>     public void stop() {
>         if (JenaSystem.DEBUG_INIT)
>             System.err.println("InitTEST -- finish");
>     }
>     @Override
>     public int level() {
>         return 500;
>     }
>     public static void main(String... args) { // run VM option: -ea
>         JenaSystem.DEBUG_INIT = true;
>         //RDFNode r = ResourceFactory.createProperty("X"); // this works fine
>         RDFNode r = ResourceFactory.createTypedLiteral("Y"); // this causes a problem
>         System.out.println(r);
>     }
> }
> {code}



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