bundles/org.simantics.db.indexing/src/org/simantics/db/indexing/IndexedRelationsMemorySearcher.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.indexing;
  13
  14 import gnu.trove.map.hash.THashMap;
  15 import gnu.trove.set.hash.TLongHashSet;
  16
  17 import java.io.IOException;
  18 import java.util.ArrayList;
  19 import java.util.Collection;
  20 import java.util.List;
  21 import java.util.Map;
  22
  23 import org.apache.lucene.document.Document;
  24 import org.apache.lucene.index.CorruptIndexException;
  25 import org.apache.lucene.index.IndexableField;
  26 import org.apache.lucene.queryparser.classic.ParseException;
  27 import org.apache.lucene.search.MatchAllDocsQuery;
  28 import org.apache.lucene.search.Query;
  29 import org.apache.lucene.search.ScoreDoc;
  30 import org.apache.lucene.search.TopDocs;
  31 import org.apache.lucene.store.Directory;
  32 import org.eclipse.core.runtime.IProgressMonitor;
  33 import org.simantics.db.RequestProcessor;
  34 import org.simantics.db.Resource;
  35 import org.simantics.db.Session;
  36 import org.simantics.db.exception.DatabaseException;
  37 import org.simantics.db.layer0.adapter.GenericRelation;
  38 import org.simantics.utils.datastructures.Pair;
  39
  40 /**
  41  * @author Tuukka Lehtonen
  42  * @author Antti Villberg
  43  */
  44 public class IndexedRelationsMemorySearcher extends IndexedRelationsSearcherBase {
  45
  46     final IndexedRelationsSearcher backend;
  47     final GenericRelation r;
  48
  49     TLongHashSet changed = new TLongHashSet();
  50
  51     IndexedRelationsMemorySearcher(RequestProcessor session, IndexedRelationsSearcher backend, Resource relation, Resource input, GenericRelation r) throws DatabaseException {
  52         super(session, relation, input);
  53         this.backend = backend;
  54         this.r = r;
  55         setReady();
  56     }
  57
  58     @Override
  59     String getDescriptor() {
  60         return "MEM: ";
  61     }
  62
  63     @Override
  64     void insertIndex(IProgressMonitor monitor, GenericRelation r, int boundLength, Collection<Object[]> documentsData) throws CorruptIndexException, IOException, DatabaseException {
  65         for(Object[] o : documentsData) {
  66             Long resource = (Long)o[1];
  67             changed.add(resource);
  68         }
  69         super.insertIndex(monitor, r, boundLength, documentsData);
  70     }
  71
  72     @Override
  73     boolean replaceIndex(IProgressMonitor monitor, String key, Collection<Object> keyValues, GenericRelation r,
  74             int boundLength, Collection<Object[]> documentsData) throws CorruptIndexException, IOException,
  75             DatabaseException {
  76         for(Object[] o : documentsData) {
  77             Long resource = (Long)o[1];
  78             changed.add(resource);
  79         }
  80         return super.replaceIndex(monitor, key, keyValues, r, boundLength, documentsData);
  81     }
  82
  83     @Override
  84     void removeIndex(IProgressMonitor monitor, GenericRelation r, RequestProcessor processor, String key,
  85             Collection<Object> keyValues) throws DatabaseException, CorruptIndexException, IOException {
  86         for(Object o : keyValues) {
  87             Resource resource= (Resource)o;
  88             changed.add(resource.getResourceId());
  89         }
  90         super.removeIndex(monitor, r, processor, key, keyValues);
  91     }
  92
  93     public List<Object[]> allDocs(IProgressMonitor monitor, Session session) throws ParseException, IOException,
  94     DatabaseException {
  95
  96         Query query = new MatchAllDocsQuery();
  97
  98         startAccess(null, session, false);
  99
 100         TopDocs td = searcher.search(query, Integer.MAX_VALUE);
 101
 102         ScoreDoc[ ] scoreDocs = td.scoreDocs;
 103         List<Object[]> result = new ArrayList<Object[]>(scoreDocs.length);
 104
 105         final Map<String, String> classMap = new THashMap<String, String>();
 106         for (Pair<String, String> field : r.getFields()) {
 107             classMap.put(field.first, field.second);
 108         }
 109
 110         for(ScoreDoc scoreDoc:scoreDocs) {
 111
 112             try {
 113
 114                 Document doc = reader.document(scoreDoc.doc);
 115                 List<IndexableField> fs = doc.getFields();
 116                 Object[] o = new Object[fs.size()];
 117                 int index = 0;
 118                 for (IndexableField f : fs) {
 119                     String clazz = classMap.get(f.name());
 120                     if ("Long".equals(clazz)) {
 121                         o[index++] = Long.parseLong(f.stringValue());
 122                     } else {
 123                         o[index++] = f.stringValue();
 124                     }
 125                 }
 126                 result.add(o);
 127             } catch (CorruptIndexException e) {
 128                 throw new DatabaseException(e);
 129             } catch (IOException e) {
 130                 throw new DatabaseException(e);
 131             }
 132
 133         }
 134
 135         changeState(monitor, session, State.READY);
 136
 137 //        closeInternal();
 138
 139         return result;
 140
 141     }
 142
 143     public void commit() {
 144         try {
 145             if(writer != null)
 146                 writer.commit();
 147         } catch (CorruptIndexException e) {
 148             e.printStackTrace();
 149         } catch (IOException e) {
 150             e.printStackTrace();
 151         }
 152     }
 153
 154 //    public static String cacheReport() {
 155 //        StringBuilder sb = new StringBuilder();
 156 //        sb.append("Directories: ").append(directories.size()).append("\n");
 157 //        for (String key : directories.keySet()) {
 158 //            RAMDirectory dir = directories.get(key);
 159 //            if (dir != null) {
 160 //                sb.append("\t").append(dir).append("\n");
 161 //            }
 162 //        }
 163 //        sb.append("Searchers: ").append(searchers.size()).append("\n");
 164 //        for (String key : searchers.keySet()) {
 165 //            IndexedRelationsMemorySearcher s = searchers.get(key);
 166 //            if (s != null) {
 167 //                sb.append("\t").append(s.getClass()).append(": ").append(s.getIndexPath()).append("\n");
 168 //            }
 169 //        }
 170 //        return sb.toString();
 171 //    }
 172
 173     @Override
 174     Directory getDirectory(Session session) throws IOException {
 175         MemoryIndexing mem = MemoryIndexing.getInstance(session);
 176         String path = indexPath.getAbsolutePath();
 177         return mem.getDirectory(path, Queries.getAnalyzer());
 178     }
 179
 180     @Override
 181     Throwable bestEffortClear(IProgressMonitor monitor, Session session) {
 182
 183         setProblem(null);
 184
 185         MemoryIndexing mem = MemoryIndexing.getInstance(session);
 186         changed.clear();
 187
 188         String path = indexPath.getAbsolutePath();
 189         mem.remove(path);
 190
 191         return null;
 192
 193     }
 194
 195     @Override
 196     protected boolean requireChangeInfoOnReplace() {
 197         return false;
 198     }
 199
 200 }