/*
* Hibernate Search, full-text search for your domain model
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.search.backend.impl.lucene.works;
import java.io.IOException;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.backend.impl.lucene.IndexWriterDelegate;
import org.hibernate.search.backend.spi.DeleteByQueryLuceneWork;
import org.hibernate.search.backend.spi.DeletionQuery;
import org.hibernate.search.engine.ProjectionConstants;
import org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity;
import org.hibernate.search.exception.SearchException;
import org.hibernate.search.store.Workspace;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;
/**
* Stateless implementation that performs a <code>DeleteByQueryWork</code>.
*
* @author Martin Braun
* @see IndexUpdateVisitor
* @see LuceneWorkExecutor
*/
class DeleteByQueryWorkExecutor implements LuceneWorkExecutor {
private static final Log log = LoggerFactory.make();
protected final Workspace workspace;
DeleteByQueryWorkExecutor(Workspace workspace) {
this.workspace = workspace;
}
@Override
public void performWork(LuceneWork work, IndexWriterDelegate delegate, IndexingMonitor monitor) {
DeleteByQueryLuceneWork deleteWork = (DeleteByQueryLuceneWork) work;
final Class<?> entityType = work.getEntityClass();
final DeletionQuery query = deleteWork.getDeletionQuery();
if ( log.isTraceEnabled() ) {
log.tracef( "Removing all %s matching Query: %s", entityType.toString(), query.toString() );
}
BooleanQuery.Builder entityDeletionQueryBuilder = new BooleanQuery.Builder();
{
Query queryToDelete = query.toLuceneQuery( this.workspace.getDocumentBuilder( entityType ) );
entityDeletionQueryBuilder.add( queryToDelete, BooleanClause.Occur.FILTER );
}
Term classNameQueryTerm = new Term( ProjectionConstants.OBJECT_CLASS, entityType.getName() );
TermQuery classNameQuery = new TermQuery( classNameQueryTerm );
entityDeletionQueryBuilder.add( classNameQuery, BooleanClause.Occur.FILTER );
addTenantQueryTerm( work.getTenantId(), entityDeletionQueryBuilder );
try {
delegate.deleteDocuments( entityDeletionQueryBuilder.build() );
}
catch (IOException e) {
SearchException ex = log.unableToDeleteByQuery( entityType, query, e );
throw ex;
}
this.workspace.notifyWorkApplied( work );
}
private void addTenantQueryTerm(final String tenantId, BooleanQuery.Builder entityDeletionQueryBuilder) {
if ( tenantId != null ) {
Term tenantTerm = new Term( DocumentBuilderIndexedEntity.TENANT_ID_FIELDNAME, tenantId );
entityDeletionQueryBuilder.add( new TermQuery( tenantTerm ), BooleanClause.Occur.FILTER );
}
}
}