org.hibernate.search.backend.impl.lucene.works.UpdateExtWorkDelegate.java Source code

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Here is the source code for org.hibernate.search.backend.impl.lucene.works.UpdateExtWorkDelegate.java

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2012, Red Hat, Inc. and/or its affiliates or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat, Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */

package org.hibernate.search.backend.impl.lucene.works;

import java.io.Serializable;
import java.util.Map;

import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;
import org.hibernate.annotations.common.AssertionFailure;
import org.hibernate.search.SearchException;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.bridge.util.impl.NumericFieldUtils;
import org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity;
import org.hibernate.search.store.Workspace;
import org.hibernate.search.util.impl.ScopedAnalyzer;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;

/**
 * This applies the index update operation using the Lucene operation
 * {@link org.apache.lucene.index.IndexWriter#updateDocument(Term, org.apache.lucene.document.Document, org.apache.lucene.analysis.Analyzer)}
 *
 * This is the most efficient way to update the index, but we can apply it only if the Document is uniquely identified
 * by a single term (so no index sharing across entities or Numeric ids).
 *
 * @author Sanne Grinovero <sanne@hibernate.org> (C) 2012 Red Hat Inc.
 */
public final class UpdateExtWorkDelegate extends UpdateWorkDelegate {

    private static final Log log = LoggerFactory.make();

    private final AddWorkDelegate addDelegate;
    private final Class<?> managedType;
    private final DocumentBuilderIndexedEntity<?> builder;
    private final boolean idIsNumeric;
    private final Workspace workspace;

    UpdateExtWorkDelegate(Workspace workspace, AddWorkDelegate addDelegate) {
        super(null, null);
        this.workspace = workspace;
        this.addDelegate = addDelegate;
        this.managedType = workspace.getEntitiesInIndexManager().iterator().next();
        this.builder = workspace.getDocumentBuilder(managedType);
        this.idIsNumeric = DeleteWorkDelegate.isIdNumeric(builder);
    }

    public void performWork(LuceneWork work, IndexWriter writer, IndexingMonitor monitor) {
        checkType(work);
        final Serializable id = work.getId();
        try {
            if (idIsNumeric) {
                log.tracef("Deleting %s#%s by query using an IndexWriter#updateDocument as id is Numeric",
                        managedType, id);
                writer.deleteDocuments(NumericFieldUtils.createExactMatchQuery(builder.getIdKeywordName(), id));
                // no need to log the Add operation as we'll log in the delegate
                this.addDelegate.performWork(work, writer, monitor);
            } else {
                log.tracef("Updating %s#%s by id using an IndexWriter#updateDocument.", managedType, id);
                Term idTerm = new Term(builder.getIdKeywordName(), work.getIdInString());
                Map<String, String> fieldToAnalyzerMap = work.getFieldToAnalyzerMap();
                ScopedAnalyzer analyzer = builder.getAnalyzer();
                analyzer = AddWorkDelegate.updateAnalyzerMappings(workspace, analyzer, fieldToAnalyzerMap);
                writer.updateDocument(idTerm, work.getDocument(), analyzer);
            }
            workspace.notifyWorkApplied(work);
        } catch (Exception e) {
            String message = "Unable to update " + managedType + "#" + id + " in index.";
            throw new SearchException(message, e);
        }
        if (monitor != null) {
            monitor.documentsAdded(1l);
        }
    }

    private void checkType(final LuceneWork work) {
        if (work.getEntityClass() != managedType) {
            throw new AssertionFailure(
                    "Unexpected type: " + work.getEntityClass() + " This workspace expects: " + managedType);
        }
    }

}