/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.statistics;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.dspace.content.Collection;
import org.dspace.content.Community;
import org.dspace.content.Item;
import org.dspace.core.Constants;
import org.dspace.core.Context;
import org.dspace.event.Consumer;
import org.dspace.event.Event;
/**
* StatisticsLogging Consumer for SolrLogger which captures Create, Update
* and Delete Events on DSpace Objects.
*
* All usage-events will be updated to capture changes to e.g.
* the owning collection
*
* @author kevinvandevelde at atmire.com
* @author ben at atmrie.com
*/
public class StatisticsLoggingConsumer implements Consumer
{
private Set<String> toRemoveQueries = null;
@Override
public void initialize() throws Exception
{
}
// TODO: checkout whether moving of collections, communities and bitstreams works
// TODO: use async threaded consumer as this might require some processing time
// TODO: we might be able to improve the performance: changing the collection will trigger 4 update commands
@Override
public void consume(Context ctx, Event event) throws Exception
{
if (toRemoveQueries == null)
{
toRemoveQueries = new HashSet<String>();
}
int dsoId = event.getSubjectID();
int dsoType = event.getSubjectType();
int eventType = event.getEventType();
// Check if we are deleting something
if (eventType == Event.DELETE)
{
// First make sure we delete everything for this dso
String query = "id:" + dsoId + " AND type:" + dsoType;
toRemoveQueries.add(query);
}
else if (eventType == Event.MODIFY && dsoType == Constants.ITEM)
{
// We have a modified item check for a withdraw/reinstate
}
else if (eventType == Event.MODIFY_METADATA
&& event.getSubjectType() == Constants.ITEM)
{
Item item = Item.find(ctx, event.getSubjectID());
String updateQuery = "id:" + item.getID() + " AND type:"
+ item.getType();
Map<String, List<String>> indexedValues = SolrLogger.queryField(
updateQuery, null, null);
// Get all the metadata
List<String> storageFieldList = new ArrayList<String>();
List<List<Object>> storageValuesList = new ArrayList<List<Object>>();
SolrLogger.update(updateQuery, "replace", storageFieldList,
storageValuesList);
}
if (eventType == Event.ADD && dsoType == Constants.COLLECTION
&& event.getObject(ctx) instanceof Item)
{
// We are mapping a new item make sure that the owning collection is
// updated
Item newItem = (Item) event.getObject(ctx);
String updateQuery = "id: " + newItem.getID() + " AND type:"
+ newItem.getType();
List<String> fieldNames = new ArrayList<String>();
List<List<Object>> valuesList = new ArrayList<List<Object>>();
fieldNames.add("owningColl");
fieldNames.add("owningComm");
List<Object> valsList = new ArrayList<Object>();
valsList.add(dsoId);
valuesList.add(valsList);
valsList = new ArrayList<Object>();
valsList.addAll(findOwningCommunities(ctx, dsoId));
valuesList.add(valsList);
// Now make sure we also update the communities
SolrLogger.update(updateQuery, "addOne", fieldNames, valuesList);
}
else if (eventType == Event.REMOVE && dsoType == Constants.COLLECTION
&& event.getObject(ctx) instanceof Item)
{
// Unmapping items
Item newItem = (Item) event.getObject(ctx);
String updateQuery = "id: " + newItem.getID() + " AND type:"
+ newItem.getType();
List<String> fieldNames = new ArrayList<String>();
List<List<Object>> valuesList = new ArrayList<List<Object>>();
fieldNames.add("owningColl");
fieldNames.add("owningComm");
List<Object> valsList = new ArrayList<Object>();
valsList.add(dsoId);
valuesList.add(valsList);
valsList = new ArrayList<Object>();
valsList.addAll(findOwningCommunities(ctx, dsoId));
valuesList.add(valsList);
SolrLogger.update(updateQuery, "remOne", fieldNames, valuesList);
}
}
private List<Object> findOwningCommunities(Context context, int collId)
throws SQLException
{
Collection coll = Collection.find(context, collId);
List<Object> owningComms = new ArrayList<Object>();
for (int i = 0; i < coll.getCommunities().length; i++)
{
Community community = coll.getCommunities()[i];
findComms(community, owningComms);
}
return owningComms;
}
private void findComms(Community comm, List<Object> parentComms)
throws SQLException
{
if (comm == null)
{
return;
}
if (!parentComms.contains(comm.getID()))
{
parentComms.add(comm.getID());
}
findComms(comm.getParentCommunity(), parentComms);
}
@Override
public void end(Context ctx) throws Exception
{
if (toRemoveQueries != null)
{
for (String query : toRemoveQueries)
{
SolrLogger.removeIndex(query);
}
}
// clean out toRemoveQueries
toRemoveQueries = null;
}
@Override
public void finish(Context ctx) throws Exception
{
}
}