Re: [Dspace-tech] REST API for DSpace
Hi Bojan, Many thnaks for the quick answer. With kind regards, Marianna Am 17.06.2011 13:40, schrieb Marianna Mühlhölzer: Hi Bojan, I want to use the REST Interface for browsing our DSpace repository by title, date and subject. When trying to sort items I get problems with the pagination. The _perpage parameter does not work. Using _perpage alone has no influence on the number of retrieved items. I always get all items. Using a combination of _perpage and _page delivers strange results. For example, _perpage=2_page=1 gives all items, _perpage=4_page=1 gives 4 items, and _perpage=4_perpage=2 is empty. I opened JIRA issue for this problem, this is probably a bug. I have two further questions: 1. The sorting process gives no information about the total number of items in the repository. Therefore, before starting pagination I have to request all items and count them, in order to realize the pagination. Is there a better way to do browsing via REST? This problem is related with DSpace API, as the underlying functions do not provide such information. In some big collections this introduces performance problem too, as we need to read bigger portion of data than is to be served. Some time ago I posted a patch for this but it do not covers Oracle and other RDMBSs completely, so should be considered different way. 2. The metadata of an item are presented as strings, which is not very comfortable to handle. I would prefer to have them via tag per metadata field. Do you plan to realize something like this? This issue has been rissen by Robin Taylor too. I haven't considered it as a problem before. It is currently reported on the JIRA list and will probably have a lower priority as there are other issues deemed more important. Thanks/Regards Bojan -- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev ___ DSpace-tech mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/dspace-tech __ If you reply to this email, your message will be added to the discussion below: http://dspace.2283337.n4.nabble.com/REST-API-for-DSpace-tp3343457p3606895.html To start a new topic under DSpace - Tech, email ml-node +3276945-743330907-242...@n4.nabble.com To unsubscribe from DSpace - Tech, click here. -- View this message in context: http://dspace.2283337.n4.nabble.com/REST-API-for-DSpace-tp3343457p3607428.html Sent from the DSpace - Tech mailing list archive at Nabble.com.-- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
Re: [Dspace-tech] REST API for DSpace
Hi Bojan, I want to use the REST Interface for browsing our DSpace repository by title, date and subject. When trying to sort items I get problems with the pagination. The _perpage parameter does not work. Using _perpage alone has no influence on the number of retrieved items. I always get all items. Using a combination of _perpage and _page delivers strange results. For example, _perpage=2_page=1 gives all items, _perpage=4_page=1 gives 4 items, and _perpage=4_perpage=2 is empty. I have two further questions: 1. The sorting process gives no information about the total number of items in the repository. Therefore, before starting pagination I have to request all items and count them, in order to realize the pagination. Is there a better way to do browsing via REST? 2. The metadata of an item are presented as strings, which is not very comfortable to handle. I would prefer to have them via tag per metadata field. Do you plan to realize something like this? With regards, Marianna -- Marianna Mühlhölzer Niedersächsische Staats- und Universitätsbibliothek BibliotheksInformationsSysteme Platz der Göttinger Sieben 1 37073 Göttingen Zi.: 2.38 Tel.: +49 (0)551 39-4255 E-Mail: muehlhoel...@sub.uni-goettingen.de -- View this message in context: http://dspace.2283337.n4.nabble.com/REST-API-for-DSpace-tp3343457p3605171.html Sent from the DSpace - Tech mailing list archive at Nabble.com.-- EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
Re: [Dspace-tech] Dspace SRW/SRU search problem
Hi, i mean here: http://code.google.com/p/oclcsrwdspacelucene/issues/list 2011/6/15 Kocisky koci...@autistici.org Hi, i would suggest you to post the issue at http://code.google.com/p/oclcsrw/issues/list. K Ralph LeVan wrote me already the solution: my oclcsrwdspacelucene-code was not up to date. Thanks, Marianna 2011/6/2 Marianna Mühlhölzer mmue...@sub.uni-goettingen.de Dear all, several month ego I installed the Dspace SRW/SRU Service for DSpace 1.6.2 and it worked without any problems. But after an update to DSpace 1.7.2 I get the following error message: 2011-06-02 19:07:36,365 DEBUG ORG.oclc.os.SRW.SRWDatabase @ query: 64 63 2e 74 69 74 6c 65 20 3d 20 22 74 65 73 74 dc.title = test 22 2011-06-02 19:07:37,091 INFO ORG.oclc.os.SRW.SRWDatabase @ 'dc.title = test'== 9 2011-06-02 19:07:37,092 DEBUG ORG.oclc.os.SRW.SRWDatabase @ keeping resultSet 'i28ewp' for 300 seconds 2011-06-02 19:07:37,092 DEBUG ORG.oclc.os.SRW.SRWDatabase @ schemaName=info:srw/schema/1/dc-v1.1, schemaID=info:srw/schema/1/dc-v1.1, sortKeys= 2011-06-02 19:07:37,092 DEBUG ORG.oclc.os.SRW.SRWDatabase @ making RecordIterator, startPoint=1, schemaID=info:srw/schema/1/dc-v1.1 2011-06-02 19:07:37,113 INFO ORG.oclc.os.SRW.DSpaceLucene.LuceneRecordIterator @ lqr=ORG.oclc.os.SRW.DSpaceLucene.LuceneQueryResult@1 f001f, startPoint=1, numRecs=9 2011-06-02 19:07:37,113 DEBUG ORG.oclc.os.SRW.SRWDatabase @ trying to get 9 records starting with record 1 from a set of 9 records 2011-06-02 19:07:37,114 INFO ORG.oclc.os.SRW.DSpaceLucene.LuceneRecordIterator @ in hasNext: whichRecord=0, numRecs=9, resultItems.le ngth=9 2011-06-02 19:07:37,114 INFO ORG.oclc.os.SRW.DSpaceLucene.LuceneRecordIterator @ in nextRecord: lqr=ORG.oclc.os.SRW.DSpaceLucene.LuceneQueryResult@1f001f, startPoint=1, whichRecord=0 2011-06-02 19:07:37,116 ERROR gov.loc.www.zing.srw.srw_bindings.SRWSoapBindingImpl @ java.lang.NullPointerException java.lang.NullPointerException at org.dspace.storage.rdbms.DatabaseManager.queryTable(DatabaseManager.java:220) at org.dspace.content.Item $MetadataCache.retrieveMetadata(Item.java:2710) at org.dspace.content.Item $MetadataCache.get(Item.java:2643) at org.dspace.content.Item.getMetadata(Item.java:2616) at org.dspace.content.Item.getMetadata(Item.java:457) It looks as if the number of the query results is retrieved and the records cannot be fetched. Can anybody help me with this problem? Thanks with regards, Marianna Mühlhölzer __ View this message in context: Dspace SRW/SRU search problem Sent from the DSpace - Tech mailing list archive at Nabble.com. -- Simplify data backup and recovery for your virtual environment with vRanger. Installation's a snap, and flexible recovery options mean your data is safe, secure and there when you need it. Discover what all the cheering's about. Get your free trial download today. http://p.sf.net/sfu/quest-dev2dev2 ___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https
[Dspace-tech] Dspace SRW/SRU search problem
Dear all, several month ego I installed the Dspace SRW/SRU Service for DSpace 1.6.2 and it worked without any problems. But after an update to DSpace 1.7.2 I get the following error message: 2011-06-02 19:07:36,365 DEBUG ORG.oclc.os.SRW.SRWDatabase @ query: 64 63 2e 74 69 74 6c 65 20 3d 20 22 74 65 73 74 dc.title = test 22 2011-06-02 19:07:37,091 INFO ORG.oclc.os.SRW.SRWDatabase @ 'dc.title = test'== 9 2011-06-02 19:07:37,092 DEBUG ORG.oclc.os.SRW.SRWDatabase @ keeping resultSet 'i28ewp' for 300 seconds 2011-06-02 19:07:37,092 DEBUG ORG.oclc.os.SRW.SRWDatabase @ schemaName=info:srw/schema/1/dc-v1.1, schemaID=info:srw/schema/1/dc-v1.1, sortKeys= 2011-06-02 19:07:37,092 DEBUG ORG.oclc.os.SRW.SRWDatabase @ making RecordIterator, startPoint=1, schemaID=info:srw/schema/1/dc-v1.1 2011-06-02 19:07:37,113 INFO ORG.oclc.os.SRW.DSpaceLucene.LuceneRecordIterator @ lqr=ORG.oclc.os.SRW.DSpaceLucene.LuceneQueryResult@1 f001f, startPoint=1, numRecs=9 2011-06-02 19:07:37,113 DEBUG ORG.oclc.os.SRW.SRWDatabase @ trying to get 9 records starting with record 1 from a set of 9 records 2011-06-02 19:07:37,114 INFO ORG.oclc.os.SRW.DSpaceLucene.LuceneRecordIterator @ in hasNext: whichRecord=0, numRecs=9, resultItems.le ngth=9 2011-06-02 19:07:37,114 INFO ORG.oclc.os.SRW.DSpaceLucene.LuceneRecordIterator @ in nextRecord: lqr=ORG.oclc.os.SRW.DSpaceLucene.LuceneQueryResult@1f001f, startPoint=1, whichRecord=0 2011-06-02 19:07:37,116 ERROR gov.loc.www.zing.srw.srw_bindings.SRWSoapBindingImpl @ java.lang.NullPointerException java.lang.NullPointerException at org.dspace.storage.rdbms.DatabaseManager.queryTable(DatabaseManager.java:220) at org.dspace.content.Item $MetadataCache.retrieveMetadata(Item.java:2710) at org.dspace.content.Item$MetadataCache.get(Item.java:2643) at org.dspace.content.Item.getMetadata(Item.java:2616) at org.dspace.content.Item.getMetadata(Item.java:457) It looks as if the number of the query results is retrieved and the records cannot be fetched. Can anybody help me with this problem? Thanks with regards, Marianna Mühlhölzer -- View this message in context: http://dspace.2283337.n4.nabble.com/Dspace-SRW-SRU-search-problem-tp3568912p3568912.html Sent from the DSpace - Tech mailing list archive at Nabble.com.-- Simplify data backup and recovery for your virtual environment with vRanger. Installation's a snap, and flexible recovery options mean your data is safe, secure and there when you need it. Discover what all the cheering's about. Get your free trial download today. http://p.sf.net/sfu/quest-dev2dev2 ___ DSpace-tech mailing list DSpace-tech@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dspace-tech
