1 / 21

SRU and Lucene

SRU and Lucene. Ralph LeVan Research Scientist levan@oclc.org. SRU Overview. A Simple Web Service Supports REST-ful and SOAP requests Responses are always XML records Supports Search and Retrieve Uses a Standard Query Grammar Supports Self-Configuring Clients

Download Presentation

SRU and Lucene

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. SRU and Lucene Ralph LeVan Research Scientist levan@oclc.org

  2. SRU Overview • A Simple Web Service • Supports REST-ful and SOAP requests • Responses are always XML records • Supports Search and Retrieve • Uses a Standard Query Grammar • Supports Self-Configuring Clients • A Gateway to Local Databases

  3. SRU Features • Explain Records • CQL Query Grammar • Persistent Result Sets • XML Database Records Returned • Index Browses • Stylesheets

  4. Explain Records • serverInfo • databaseInfo • metaInfo • indexInfo • schemaInfo • configInfo

  5. serverInfo • Generated Automatically • host • port • database

  6. databaseInfo • From SRWDatabase.props • databaseInfo.title • databaseInfo.description • databaseInfo.contact • Provided Automatically • implementation

  7. metaInfo • From SRWDatabase.props • metaInfo.dateModified • metaInfo.aggregatedFrom • metaInfo.dateAggregated

  8. indexInfo • Generated Automatically • “local” index set and Lucene index names • From SRWDatabase.props • qualifier.<indexSet>.<indexName> = <LuceneIndexName> • Used only if you want to map other index names to your Lucene indexes (e.g. qualifier.dc.identifier=id)

  9. schemaInfo • Generated Automatically • LuceneDocument • From SRWDatabase.props • xmlSchemas=<list of name> • <schemaName>.identifier= • <schemaName>.location= • <schemaName>.namespace= • <schemaName>.title= • [<schemaName>.transformer=] • [<schemaName>.resolver=]

  10. schemaInfo Example xmlSchemas=LuceneDocument, DC LuceneDocument.identifier=info:srw/schema/1/LuceneDocument LuceneDocument.location=http://www.oclc.org/standards/Lucene/schema/LuceneDocument.xsd LuceneDocument.namespace=http://www.oclc.org/LuceneDocument LuceneDocument.title=Lucene Demo Database records in their internal format

  11. schemaInfo Example (cont.) DC.identifier=info:srw/schema/1/dc-v1.1 DC.location=http://www.loc.gov/zing/srw/dc-schema.xsd DC.title=DC: Dublin Core Elements DC.transformer=LuceneToDC.xsl

  12. configInfo • Generated Automatically • maximumRecords (20) • numberOfRecords (10) • resultSetTTL (300) • From SRWDatabase.props • configInfo.maximumRecords • configInfo.numberOfRecords • configInfo.resultSetTTL

  13. CQL Query Grammar • Builtin: BasicLuceneQueryTranslator • CqlQueryTranslator • Query makeQuery(CQLNode cn); • Term getTerm(); • From SRWDatabase.props • SRWLuceneDatabase. CqlToLuceneQueryTranslator= <ClassName>

  14. Persistent Result Sets • Builtin: LuceneQueryResult

  15. XML Database Records • Builtin: BasicLuceneRecordResolver • RecordResolver • Void init(Properties props); • Record resolve(Document doc, String IdFieldName, ExtraDataType extraDataType) • From SRWDatabase.props • <schemaName>.resolver=<ClassName> • SRWLuceneDatabase.idFieldName= <FieldName>

  16. Index Browses • Builtin: SRWLuceneDatabase.getTerms()

  17. Stylesheets • From SRWDatabase.props • explainStyleSheet= /SRW/explainResponse.xsl • scanStyleSheet=/SRW/scanResponse.xsl • searchStyleSheet= /SRW/searchRetrieveResponse.xsl

  18. Making the Magic Happen • Drop the SRWLucene.war into your <tomcat>/webapps directory • Restart Tomcat • Edit <tomcat>/webapps/SRWLucene/WEB-INF/classes/SRWServer.props • Restart Tomcat

  19. Sample SRWServer.props db.LuceneDemoDB.class= ORG.oclc.os.SRW.Lucene.SRWLuceneDatabase db.LuceneDemoDB.home= f:/lucene-2.0.0 db.LuceneDemoDB.configuration= SRWDatabase.props

  20. Sample SRWDatabase.props databaseInfo.title=Lucene Demo Database databaseInfo.description=An index of the source code for Lucene databaseInfo.contact=Ralph LeVan (levan@oclc.org) qualifier.cql.serverChoice=contents explainStyleSheet=/SRWLucene/explainResponse.xsl scanStyleSheet=/SRWLucene/scanResponse.xsl searchStyleSheet= /SRWLucene/searchRetrieveResponse.xsl

  21. Resources • http://www.oclc.org/research/software/srw • http://staff.oclc.org/~levan/SRWLuceneSource.jar • http://staff.oclc.org/~levan/SRWLucene.war • http://staff.oclc.org/~levan/Implementing%20an%20SRWLuceneDatabase.doc • http://staff.oclc.org/~levan/SRU%20and%20Lucene.ppt • http://alcme.oclc.org/srw/SRUServerTester.html

More Related