Mercurial Hosting > luan
annotate lucene/src/luan/modules/lucene/LuceneIndex.java @ 303:fdb4bd391c28
add lucene close();
add Web_server.start();
git-svn-id: https://luan-java.googlecode.com/svn/trunk@304 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 18 Dec 2014 07:51:29 +0000 |
parents | 4d53e9fc1bd9 |
children | d34be4588556 |
rev | line source |
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1 package luan.modules.lucene; |
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2 |
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3 import java.io.File; |
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4 import java.io.FileOutputStream; |
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5 import java.io.FileInputStream; |
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6 import java.io.IOException; |
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7 import java.util.concurrent.locks.Lock; |
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8 import java.util.concurrent.locks.ReentrantLock; |
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9 import java.util.zip.ZipOutputStream; |
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10 import java.util.zip.ZipEntry; |
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11 import org.apache.lucene.analysis.Analyzer; |
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12 import org.apache.lucene.analysis.standard.StandardAnalyzer; |
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13 import org.apache.lucene.document.Document; |
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14 import org.apache.lucene.index.IndexWriter; |
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15 import org.apache.lucene.index.IndexWriterConfig; |
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16 import org.apache.lucene.index.DirectoryReader; |
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17 import org.apache.lucene.index.Term; |
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18 import org.apache.lucene.index.SnapshotDeletionPolicy; |
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19 import org.apache.lucene.store.Directory; |
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20 import org.apache.lucene.store.FSDirectory; |
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21 import org.apache.lucene.util.Version; |
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22 import org.apache.lucene.search.TermQuery; |
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23 import org.apache.lucene.search.TopDocs; |
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24 import luan.modules.Utils; |
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25 import luan.Luan; |
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26 import luan.LuanState; |
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27 import luan.LuanTable; |
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28 import luan.LuanFunction; |
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29 import luan.LuanJavaFunction; |
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30 import luan.LuanException; |
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31 |
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32 |
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33 public final class LuceneIndex { |
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34 private static final String FLD_NEXT_ID = "nextId"; |
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35 |
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36 final Lock writeLock = new ReentrantLock(); |
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37 private final File indexDir; |
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38 final SnapshotDeletionPolicy snapshotDeletionPolicy; |
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39 final IndexWriter writer; |
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40 private DirectoryReader reader; |
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41 private LuceneSearcher searcher; |
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42 public final FieldTable fields = new FieldTable(); |
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43 |
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44 public LuceneIndex(LuanState luan,String indexDirStr) throws LuanException, IOException { |
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45 File indexDir = new File(indexDirStr); |
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46 this.indexDir = indexDir; |
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47 Directory dir = FSDirectory.open(indexDir); |
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48 Version version = Version.LUCENE_4_9; |
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49 Analyzer analyzer = new StandardAnalyzer(version); |
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50 IndexWriterConfig conf = new IndexWriterConfig(version,analyzer); |
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51 snapshotDeletionPolicy = new SnapshotDeletionPolicy(conf.getIndexDeletionPolicy()); |
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52 conf.setIndexDeletionPolicy(snapshotDeletionPolicy); |
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53 writer = new IndexWriter(dir,conf); |
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54 writer.commit(); // commit index creation |
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55 reader = DirectoryReader.open(dir); |
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56 searcher = new LuceneSearcher(this,reader); |
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57 initId(luan); |
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58 } |
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59 |
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60 Document toLucene(LuanState luan,LuanTable table) throws LuanException { |
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61 return LuceneDocument.toLucene(luan,table,fields.map); |
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62 } |
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63 |
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64 LuanTable toTable(LuanState luan,Document doc) throws LuanException { |
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65 return LuceneDocument.toTable(luan,doc,fields.reverseMap); |
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66 } |
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67 |
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68 public String map_field_name(String fld) { |
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69 String s = fields.map.get(fld); |
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70 return s!=null ? s : fld; |
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71 } |
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72 |
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73 Term newTerm(String fld,String text) { |
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74 return new Term(map_field_name(fld),text); |
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75 } |
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76 |
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77 public LuceneWriter openWriter() { |
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78 return new LuceneWriter(this); |
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79 } |
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80 |
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81 synchronized LuceneSearcher openSearcher() throws IOException { |
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82 DirectoryReader newReader = DirectoryReader.openIfChanged(reader); |
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83 if( newReader != null ) { |
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84 reader.decRef(); |
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85 reader = newReader; |
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86 searcher = new LuceneSearcher(this,reader); |
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87 } |
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88 reader.incRef(); |
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89 return searcher; |
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90 } |
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91 |
233
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92 LuceneSnapshot openSnapshot() throws IOException { |
230
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93 return new LuceneSnapshot(this); |
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94 } |
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95 |
252
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96 public void delete_all() throws IOException { |
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97 writeLock.lock(); |
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98 try { |
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99 writer.deleteAll(); |
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100 writer.commit(); |
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101 id = idLim = 0; |
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102 } finally { |
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103 writeLock.unlock(); |
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104 } |
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105 } |
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106 |
230
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107 |
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108 private long id = 0; |
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109 private long idLim = 0; |
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110 private final int idBatch = 10; |
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111 |
233
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112 private void initId(LuanState luan) throws LuanException, IOException { |
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113 TopDocs td = searcher.search(new TermQuery(newTerm("type","next_id")),1); |
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114 switch(td.totalHits) { |
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115 case 0: |
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116 break; // do nothing |
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117 case 1: |
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118 LuanTable doc = searcher.doc(luan,td.scoreDocs[0].doc); |
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119 idLim = (Long)doc.get(FLD_NEXT_ID); |
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120 id = idLim; |
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121 break; |
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122 default: |
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123 throw new RuntimeException(); |
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124 } |
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125 } |
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126 |
233
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127 synchronized String nextId(LuanState luan) throws LuanException, IOException { |
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128 String rtn = Long.toString(++id); |
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129 if( id > idLim ) { |
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130 idLim += idBatch; |
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131 LuanTable doc = Luan.newTable(); |
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132 doc.put( "type", "next_id" ); |
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133 doc.put( FLD_NEXT_ID, idLim ); |
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134 writer.updateDocument(newTerm("type","next_id"),toLucene(luan,doc)); |
230
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135 } |
233
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136 return rtn; |
230
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137 } |
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138 |
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139 |
233
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140 public void backup(LuanState luan,String zipFile) throws LuanException, IOException { |
230
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141 if( !zipFile.endsWith(".zip") ) |
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142 throw luan.exception("file "+zipFile+" doesn't end with '.zip'"); |
230
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143 LuceneSnapshot snapshot = openSnapshot(); |
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144 try { |
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145 ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile)); |
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146 for( String fileName : snapshot.getFileNames() ) { |
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147 out.putNextEntry(new ZipEntry(fileName)); |
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148 FileInputStream in = new FileInputStream(new File(indexDir,fileName)); |
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149 Utils.copyAll(in,out); |
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150 in.close(); |
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151 out.closeEntry(); |
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152 } |
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153 out.close(); |
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154 } finally { |
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155 snapshot.close(); |
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156 } |
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157 } |
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158 |
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159 |
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160 |
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161 // luan |
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162 |
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163 public String to_string() { |
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164 return writer.getDirectory().toString(); |
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165 } |
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166 |
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167 public void Writer(LuanState luan,LuanFunction fn) throws LuanException, IOException { |
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168 LuceneWriter writer = openWriter(); |
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169 try { |
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170 luan.call( fn, new Object[]{writer.table()} ); |
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171 writer.commit(); |
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172 } finally { |
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173 writer.close(); |
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174 } |
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175 } |
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176 |
233
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177 public Object Searcher(LuanState luan,LuanFunction fn) throws LuanException, IOException { |
232
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178 LuceneSearcher searcher = openSearcher(); |
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179 try { |
233
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180 return luan.call( fn, new Object[]{searcher.table()} ); |
232
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181 } finally { |
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182 searcher.close(); |
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183 } |
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184 } |
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185 |
303
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186 public void close() throws IOException { |
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add lucene close();
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187 writer.close(); |
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add lucene close();
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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188 reader.close(); |
230
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parents:
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189 } |
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parents:
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190 |
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191 } |