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SRU and Lucene. Ralph LeVan Research Scientist [email protected] 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

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sru and lucene

SRU and Lucene

Ralph LeVan

Research Scientist

[email protected]

sru overview
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
sru features
SRU Features
  • Explain Records
  • CQL Query Grammar
  • Persistent Result Sets
  • XML Database Records Returned
  • Index Browses
  • Stylesheets
explain records
Explain Records
  • serverInfo
  • databaseInfo
  • metaInfo
  • indexInfo
  • schemaInfo
  • configInfo
serverinfo
serverInfo
  • Generated Automatically
    • host
    • port
    • database
databaseinfo
databaseInfo
  • From SRWDatabase.props
    • databaseInfo.title
    • databaseInfo.description
    • databaseInfo.contact
  • Provided Automatically
    • implementation
metainfo
metaInfo
  • From SRWDatabase.props
    • metaInfo.dateModified
    • metaInfo.aggregatedFrom
    • metaInfo.dateAggregated
indexinfo
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)
schemainfo
schemaInfo
  • Generated Automatically
    • LuceneDocument
  • From SRWDatabase.props
    • xmlSchemas=<list of name>
    • <schemaName>.identifier=
    • <schemaName>.location=
    • <schemaName>.namespace=
    • <schemaName>.title=
    • [<schemaName>.transformer=]
    • [<schemaName>.resolver=]
schemainfo example
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

schemainfo example cont
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

configinfo
configInfo
  • Generated Automatically
    • maximumRecords (20)
    • numberOfRecords (10)
    • resultSetTTL (300)
  • From SRWDatabase.props
    • configInfo.maximumRecords
    • configInfo.numberOfRecords
    • configInfo.resultSetTTL
cql query grammar
CQL Query Grammar
  • Builtin: BasicLuceneQueryTranslator
  • CqlQueryTranslator
    • Query makeQuery(CQLNode cn);
    • Term getTerm();
  • From SRWDatabase.props
    • SRWLuceneDatabase. CqlToLuceneQueryTranslator= <ClassName>
persistent result sets
Persistent Result Sets
  • Builtin: LuceneQueryResult
xml database records
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>
index browses
Index Browses
  • Builtin: SRWLuceneDatabase.getTerms()
stylesheets
Stylesheets
  • From SRWDatabase.props
    • explainStyleSheet= /SRW/explainResponse.xsl
    • scanStyleSheet=/SRW/scanResponse.xsl
    • searchStyleSheet= /SRW/searchRetrieveResponse.xsl
making the magic happen
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
sample srwserver props
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

sample srwdatabase props
Sample SRWDatabase.props

databaseInfo.title=Lucene Demo Database

databaseInfo.description=An index of the source code for Lucene

databaseInfo.contact=Ralph LeVan ([email protected])

qualifier.cql.serverChoice=contents

explainStyleSheet=/SRWLucene/explainResponse.xsl

scanStyleSheet=/SRWLucene/scanResponse.xsl

searchStyleSheet= /SRWLucene/searchRetrieveResponse.xsl

resources
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
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