PHP Error upon Viewing the Manage Archive Page

[pennington]

I have 3 Dublin Core-based archives I'm harvesting using version 2.3.0.0, and 2 of them appear to be working well. One of them, however, is throwing PHP errors when you click on the Manage Archive link in the admin interface for that archive. The error message is:

[Tue Jun 29 09:05:21 2010] [error] [client 10.10.30.120] PHP Fatal error: Call to a member function getChildByName() on a non-object in /var/www/html/harvester/plugins/harvesters/oai/OAIHarvester.inc.php on line 201, referer: http://connect.rhodes.edu/harvester/ind ... n/archives

I've tried deleting that archive and re-adding it, but the error always reappears.

I am able to harvest some records from the archive via the command line, but I'm not able to harvest from the web interface.

I was able to harvest from this OAI repository with the 2.0.1 of OHS without issue.

Any ideas? Thanks in advance for the help.

Stacy Pennington
Rhodes College

[asmecher]

Hi Stacy,

It looks like the Harvester is having trouble parsing a response from the ListSets verb for that archive. Could you post the OAI URL here, or if it's private, PM it to me?

Regards,
Alec Smecher
Public Knowledge Project Team

[michaelortiz]

Hey,

I have the same trouble and looks like the solution isn't posted. Can someone bring me a hand?

Regards
Miguel

[asmecher]

Hi Miguel,

Same as above -- could you post or PM me the OAI URL?

Regards,
Alec Smecher
Public Knowledge Project Team

[iniciativaupc]

I have the same issue.

The OAI url that i'm using is from OAI standards http://eprints.upc.es:8080/revistes-oai ... Prefix=pam

Maybe the metadataPrefix=pam which is from http://www.idealliance.org/specifications/prism/ is not supported (even that is standard?). Even that I hope there's a "simple" way to create more metadata schemas that use OAI's protocol?

Thanks,
Raimon.

[asmecher]

Hi Raimon,

As far as I'm aware, nobody has implemented a Prism PAM plugin for OHS. Each format that's supported is implemented as a plugin -- currently Dublin Core, ETDMS, MARC, and MODS are supported. Have a look in plugins/schemas to see what those look like.

Regards,
Alec Smecher
Public Knowledge Project Team

[iniciativaupc]

I'll try to develop the Prism PAM plugin for OHS...
There's any developer documentation about that?

Thanks,
Raimon

[asmecher]

Hi Raimon,

The OJS Technical Reference might be helpful -- of course it was written for OJS rather than OHS, but the two applications have a lot of common code structures. Other than that, the existing schema plugins are your best references. And as always, feel free to ask questions here.

Regards,
Alec Smecher
Public Knowledge Project Team

[iniciativaupc]

Hi Alec,

I tried to develop sort of Prism PAM plugin for OHS (done by reverse engeenering on the dc and etdms schema plugins). I have problems on its installation. The only way of installing the plugin is by uploading it (with .tar.gz) inside de ohs (with the graphic ui?). Since I'm developing with windows I'm reciving an error:

Errors occurred processing this form:

The tar command is not available. Please correctly configure it in your "config.inc.php".

I also tried to upload the files directly to the folder of schema's but its also not working.

Do you have any clue about that?

Thank you.
Raimon

[asmecher]

Hi Raimon,

You can work directly on the plugin by placing it alongside the others in plugins/schemas -- no need to upload it via the web interface.

Regards,
Alec Smecher
Public Knowledge Project Team

[iniciativaupc]

Hi Alec,
since I put my pam plugin in the same /schemas/ folder and the ohs is not working.
Can I talk to any of the dev's of the harvester/schema developers ?

Thanks,
Raimon.

[asmecher]

Hi Raimon,

That's probably me -- I'm happy to answer questions here, though I can't necessarily work with your code in depth.

Regards,
Alec Smecher
Public Knowledge Project Team

[iniciativaupc]

Ok, great .

I modified the dc schema to adopt de pam standard, but since it's not working, I may ask:

- To add a schema it's enough with the archives in /schema/dc for example? Or is necessary to go to any other part of the code in ohs?

Thanks Alec,
I'll try to debug my code and see if there's any other issue apart from that.

Raimon.

[asmecher]

Hi Raimon,

There is one other thing you'll need to add -- have a look in registry/schemaMap.xml to see the mapping associating OAI metadata prefixes with the specific plugins that respond to requests for them. You'll need to add a new mapping for your plugin. Otherwise you should just need to work with the schema plugin itself.

Regards,
Alec Smecher
Public Knowledge Project Team