The FileSerializer listens to the JMS events generated from the repository to retrieve the RDF and convert it to SOLR document format with name fields, then persist it to the file system as backups. 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.
The FileSerializer serializes the raw SOLR document with name fields, which is converted from the RDF. The files are stored under the configured directory file.serializer.dir with a file name that concatenates the id and the timestamp like id@yyyyMMddHHmmss.
Configuration
The indexer is configured using Spring that can be done through the Java bean setter methods. Here is a sample configuration fragment showing how to configure and use the FileSerializer:
<!-- file serializer -->
<bean id="fileSerializer" class="org.fcrepo.indexer.FileSerializer">
<property name="path" value="${file.serializer.dir:./target/test-classes/fileSerializer/}"/>
</bean>
<!-- Message Driven POJO (MDP) that manages individual indexers -->
<bean id="indexerGroup" class="org.fcrepo.indexer.IndexerGroup">
<constructor-arg name="repositoryURL" value="http://${fcrepo.host:localhost}:${fcrepo.port:8080}${fcrepo.context:/}rest" />
<constructor-arg name="indexers">
<set>
...
<ref bean="fileSerializer"/>
...
</set>
</constructor-arg>
...
</bean>
