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The RdfPersistenceIndexer listens to the repository generated JMS events and persists metadata in a configurable RDF format to the file system. It implements the org.fcrepo.indexer.Indexer interface for the indexing functionalities, which consists of the methods to handle new/updated records and deleted records. |
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The indexer is configured using Spring that can be done with Java bean setter methods. The base filesystem storage path, RDF variant, and filename extension be configured. Here is a sample configuration fragment showing how to configure and use the RdfPersistenceIndexer:
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<!-- jcr/xml persistence Indexer -->
<bean id="rdfPersist" class="org.fcrepo.indexer.persistence.RdfPersistenceIndexer">
<constructor-arg value="${fcrepo.rdf.storage:fcrepo4-rdf}" />
<constructor-arg value="${fcrepo.rdf.lang:TURTLE}" />
<constructor-arg value="${fcrepo.rdf.ext:.ttl}" />
</bean>
<!-- Message Driven POJO (MDP) that manages individual indexers -->
<bean id="indexerGroup" class="org.fcrepo.indexer.IndexerGroup">
<constructor-arg name="repositoryURL" value="http://${fcrepo.host:localhost}:${fcrepo.port:8080}${fcrepo.context:/}rest" />
<constructor-arg name="indexers">
<set>
...
<ref bean="rdfPersist"/>
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</set>
</constructor-arg>
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</bean> |
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