README

Akubra (https://wiki.duraspace.org/display/AKUBRA/Akubra+Project) is a file system abstraction layer
which is used by fedora-commons (http://fedora-commons.org/)

This implementation enables fedora-commons to use a Hadoop filesystem (http://hadoop.apache.org/)
as an underlying object and datastream storage.

akubra-hdfs is still in an early development state and in no way ready for production use!

In order to use akubra-hdfs with a fedora-commons repository it's enough to change the file 
$FEDORA_HOME/server/config/akubra-llstore.xml and edit the two beans 'fsObjectStore' 
and 'fsDataStreamStore' to use the class 'de.fiz.akubra.hdfs.HDFSBlobStore'and the two beans 
'fsObjectStoreMapper' and fsDatastreamStoreMapper' to be of class 'de.fiz.akubra.hdfs.HDFSIdMapper':


  <bean name="fsObjectStore"
        class="de.fiz.akubra.hdfs.HDFSBlobStore"
        singleton="true">
    <!-- the hdfs namenode URI goes here -->
    <constructor-arg value="hdfs://localhost:9000/fedora/objects"/>
  </bean>
  
    <bean name="fsObjectStoreMapper"
        class="de.fiz.akubra.hdfs.HDFSIdMapper"
        singleton="true">
    <constructor-arg ref=fsObjectStore"/>
  </bean>
  


  <bean name="fsDatastreamStore"
        class="de.fiz.akubra.hdfs.HDFSBlobStore"
        singleton="true">
    <!-- the hdfs namenode URI goes here -->
    <constructor-arg value="hdfs://localhost:9000/fedora/datastreams"/>
  </bean>

  <bean name="fsDatastreamStoreMapper"
        class="de.fiz.akubra.hdfs.HDFSIdMapper"
        singleton="true">
    <constructor-arg ref=fsDatastreamStore"/>
  </bean>


akubra-hdfs is licensed under the Apache License 2.0

       http://www.apache.org/licenses/LICENSE-2.0