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Re: [Jzjkit-user] jzkit2_z3950_plugin
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From: Ian I. <ian...@k-...> - 2005-08-24 09:49:43
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Ack, yeah, sorry.. I'll take a look and get this to you.
Ian.
On Wed, 2005-08-24 at 10:18 +0100, Stracchino, Peri wrote:
> Hi
>
> Have used the new jar (version 2.0.1) to gain access to our
> id/password autheniticated database. The authentication is now working
> well, however a new problem seems to have been introduced which was
> previously working correctly. Basically a null pointer exception is
> now thrown when 'present' is called.
>
> This is definately a feature of the new jar, as I have tested it
> against a database which does not require authentication,
> using firstly the 2.0.0 jar and secondly the 2.0.1 jar. The error only
> occurs with 2.0.1 - when 2.0.0 is used, the expected data is displayed
> correctly.
>
> Are there perhaps other differences between the two jars that we need
> to take account of when implementing our present method?
>
> Stack trace and implementation listings below:
>
> This is the stack trace;
>
> [java] 23-Aug-2005 16:43:36
> org.jzkit.search.provider.z3950.Z3950Origin incomingPresentResponse
> [java] SEVERE: Unable to locate callback target or outstanding
> operation info for refid 32820206:0
> [java] java.lang.NullPointerException
> [java] at
> org.jzkit.a2j.gen.AsnUseful.EXTERNAL_codec.serialize(EXTERNAL_codec.java:41)
> [java] at
> org.jzkit.a2j.codec.runtime.BEROutputStream.choice(BEROutputStream.java:295)
> [java] at
> org.jzkit.z3950.gen.v3.Z39_50_APDU_1995.record_inline13_codec.serialize(record_inline13_codec.java:52)
> [java] at
> org.jzkit.a2j.codec.runtime.BEROutputStream.explicit_tag(BEROutputStream.java:409)
> [java] at
> org.jzkit.z3950.gen.v3.Z39_50_APDU_1995.NamePlusRecord_codec.serialize(NamePlusRecord_codec.java:55)
> [java] at
> org.jzkit.a2j.codec.runtime.BEROutputStream.sequenceOf(BEROutputStream.java:435)
> [java] at
> org.jzkit.z3950.gen.v3.Z39_50_APDU_1995.responseRecords_inline11_codec.serialize(responseRecords_inline11_codec.java:46)
> [java] at
> org.jzkit.a2j.codec.runtime.BEROutputStream.choice(BEROutputStream.java:289)
> [java] at
> org.jzkit.z3950.gen.v3.Z39_50_APDU_1995.Records_codec.serialize(Records_codec.java:50)
> [java] at
> org.jzkit.z3950.gen.v3.Z39_50_APDU_1995.PresentResponse_codec.serialize(PresentResponse_codec.java:61)
> [java] at
> org.jzkit.a2j.codec.runtime.BEROutputStream.choice(BEROutputStream.java:289)
> [java] at
> org.jzkit.z3950.gen.v3.Z39_50_APDU_1995.PDU_codec.serialize(PDU_codec.java:70)
> [java] at
> org.jzkit.z3950.util.ZTargetEndpoint.encodeAndSend(ZTargetEndpoint.java:384)
> [java] at
> org.jzkit.z3950.server.ZServerAssociation.notifyPresentResult(ZServerAssociation.java:372)
> [java] at test.JZKitBackend.present(JZKitBackend.java:105)
> [java] at
> org.jzkit.z3950.server.ZServerAssociation.incomingPresentRequest(ZServerAssociation.java:335)
> [java] at
> org.jzkit.z3950.util.GenericEventToTargetListenerAdapter.update(GenericEventToTargetListenerAdapter.java:66)
> [java] at
> java.util.Observable.notifyObservers(Observable.java:142)
> [java] at
> org.jzkit.z3950.util.ZTargetEndpoint.notifyAPDUEvent(ZTargetEndpoint.java:211)
> [java] at
> org.jzkit.z3950.util.ZTargetEndpoint.run(ZTargetEndpoint.java:419)
>
>
> And this is the implementation we are using - which does work using
> 2.0.0;
>
> public void present(BackendPresentResult bpr) {
> try {
> IRResultSet resultSet =
> (IRResultSet)result_sets.get(bpr.result_set_name);
> bpr.result_records = resultSet.getFragment(bpr.start,
> bpr.count, bpr.archetype);
> bpr.next_result_set_position = bpr.start + bpr.count;
> bpr.assoc.notifyPresentResult(bpr);
> } catch(Exception e) {
> e.printStackTrace();
> }
> }
>
> Hoping you can throw some light on this
>
> Peri
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