Package org.dspace.rdf

Class RDFConsumer

java.lang.Object
org.dspace.rdf.RDFConsumer
All Implemented Interfaces:
Consumer
public class RDFConsumer extends Object implements Consumer
Author:
Pascal-Nicolas Becker (dspace -at- pascal -hyphen- becker -dot- de)

  • Field Details

    • toConvert

      protected Deque<org.dspace.rdf.RDFConsumer.DSOIdentifier> toConvert

    • toDelete

      protected Deque<org.dspace.rdf.RDFConsumer.DSOIdentifier> toDelete

    • bitstreamService

      protected BitstreamService bitstreamService

    • bundleService

      protected BundleService bundleService

    • siteService

      protected SiteService siteService

    • workspaceItemService

      protected WorkspaceItemService workspaceItemService

    • workflowItemService

      protected WorkflowItemService workflowItemService

  • Constructor Details

    • RDFConsumer

      public RDFConsumer()

  • Method Details

    • initialize

      public void initialize() throws Exception
      Description copied from interface: Consumer
      Allocate any resources required to operate. This may include initializing any pooled JMS resources. Called ONCE when created by the dispatcher pool. This should be used to set up expensive resources that will remain for the lifetime of the consumer.
      Specified by:
      initialize in interface Consumer
      Throws:
      Exception - if error

    • consume

      public void consume(Context ctx, Event event) throws SQLException
      Description copied from interface: Consumer
      Consume an event. Events may be filtered by a dispatcher, hiding them from the consumer. This behavior is based on the dispatcher/consumer configuration. Should include logic to initialize any resources required for a batch of events.

      This method must not commit the context. Committing causes re-dispatch of the event queue, which can result in infinite recursion leading to memory exhaustion as seen in {@link https://github.com/DSpace/DSpace/pull/8756}.

      Specified by:
      consume in interface Consumer
      Parameters:
      ctx - the current DSpace session
      event - the content event
      Throws:
      SQLException

    • consumeBitstream

      public void consumeBitstream(Context ctx, Event event) throws SQLException
      Throws:
      SQLException

    • consumeBundles

      public void consumeBundles(Context ctx, Event event) throws SQLException
      Throws:
      SQLException

    • consumeCommunityCollectionItem

      public void consumeCommunityCollectionItem(Context ctx, Event event) throws SQLException
      Throws:
      SQLException

    • consumeSite

      public void consumeSite(Context ctx, Event event) throws SQLException
      Throws:
      SQLException

    • end

      public void end(Context ctx) throws Exception
      Description copied from interface: Consumer
      Signal that there are no more events queued in this event stream and event processing for the preceding consume calls should be finished up.
      Specified by:
      end in interface Consumer
      Parameters:
      ctx - the execution context object
      Throws:
      Exception - if error

    • finish

      public void finish(Context ctx) throws Exception
      Description copied from interface: Consumer
      Finish - free any allocated resources. Called when consumer (via it's parent dispatcher) is going to be destroyed by the dispatcher pool.
      Specified by:
      finish in interface Consumer
      Parameters:
      ctx - the execution context object
      Throws:
      Exception - if error