Pengine issue

Help!
1

I’m using: pengines and JavaPengines library latest version on Github

I want the code to: I want to send a sourceText and query to the pengines server using the JavaPengines library.

But what I’m getting is: However, from the extensive trial and error, it seems the JavaPengine library is somehow not compiling or executing the sourceText being sent.

My code looks like this:

PengineBuilder builder = new PengineBuilder();
        try {
            builder.setServer("http://localhost:3030/");
            builder.setDestroy(false);
            builder.setSrctext("cat(tom).");
            builder.removeAsk();
            pengine = builder.newPengine();
            pengine.dumpStateDebug();

            Query query = pengine.ask("cat(X).");
            pengine.dumpStateDebug();

            if ( !query.hasNext() )
                fail("Query did not fetch result");

        } catch (MalformedURLException
            | CouldNotCreateException
            | PengineNotReadyException e) {
                e.printStackTrace();
                fail("could not query server: " + e.getLocalizedMessage());
        } finally {
            if ( pengine != null && !pengine.isDestroyed() )
                pengine.destroy();
        }

FYI, tried to debug this with @ AnnieTheObscure already and raising it here as discussed with her. Thanks Annie for all the help and thanks to everyone here in advance for your help.

2

Since bitrot in the JavaPengines libs is already a candidate, you might try running the tests. If you have JavaPengines running already should be trivial to do.

3

I don’t think there has been renaming in the Prolog part or the JavaScript part. Git log might help.

1 Like
4

Jan - at one point didn’t the x-prolog script tag support go away, or some such? My memory is hazy here, but remember some interaction with you and Torbjorn when writing JavaPengines.

5

I’ve been writing a Pengine plugin for Netbeans (my preferred IDE), and have playing with the Java Pengines library, and noted a few issues.
@anniepoo There is currently a bug in the JavaPengines java library. It is sending Srctext with the name ‘srctext’, whereas it should be ‘src_text’, similarly, srcurl maybe should be src_url (not tested).
When using the library, the ask query should not end with a period since behind the scenes the query is embedded inside an ask() prolog term!
Hopefully this should get you kickstarted.

1 Like
6

Hey, thanks!
if you’ve patched your version, could you send a PR? if not, sighosh, sounds like a fix - anyway, if somebody sends pr that’d be cool.