我确实在为这个新的 API 和缺乏诸如 NRT 管理器之类的核心事物的示例而苦苦挣扎。
我按照这个例子,这是最终的结果:
这是 NRT 管理器的构建方式:
analyzer = new StopAnalyzer(Version.LUCENE_40);
config = new IndexWriterConfig(Version.LUCENE_40, analyzer);
writer = new IndexWriter(FSDirectory.open(new File(ConfigUtil.getProperty("lucene.directory"))), config);
mgrWriter = new NRTManager.TrackingIndexWriter(writer);
ReferenceManager<IndexSearcher> mgr = new NRTManager(mgrWriter, new SearcherFactory(), true);
向 NRT 管理器的编写器添加一个新元素:
long gen = -1;
try{
Document userDoc = DocumentManager.getDocument(user);
gen = mgrWriter.addDocument(userDoc);
} catch (Exception e) {}
return gen;
经过一段时间后,我需要更新以前的文档:
// Acquire a searcher from the NRTManager. I am using the generation obtained in the creation step
((NRTManager)mgr).waitForGeneration(gen);
searcher = mgr.acquire();
//Search for the document based on some user id
Term idTerm = new Term(USER_ID, Integer.toString(userId));
Query idTermQuery = new TermQuery(term);
TopDocs result = searcher.search(idTermQuery, 1);
if (result.totalHits > 0) resultDoc = searcher.doc(result.scoreDocs[0].doc);
else resultDoc = null;
问题是resultDoc
它将始终为空。我错过了什么?我不应该使用commit()
orflush()
来查看这些更改。
我正在使用此处NRTManagerReopenThread
举例说明的 a 。
LE userDoc 创建
public static Document getDocument(User user) {
Document doc = new Document();
FieldType storedType = new FieldType();
storedType.setStored(true);
storedType.setIndexed(false);
// Store user data
doc.add(new Field(USER_ID, user.getId().toString(), storedType));
doc.add(new Field(USER_NAME, user.getFirstName() + user.getLastName(), storedType));
FieldType unstoredType = new FieldType();
unstoredType.setStored(false);
unstoredType.setIndexed(true);
Field field = null;
// Analyze Location
String tokens = "";
if (user.getLocation() != null && ! user.getLocation().isEmpty()){
for (Tag location : user.getLocation()) tokens += location.getName() + " ";
field = new Field(USER_LOCATION, tokens, unstoredType);
field.setBoost(Constants.LOCATION);
doc.add(field);
}
// Analyze Language
if (user.getLanguage() != null && ! user.getLanguage().isEmpty()){
// Same as Location
}
// Analyze Career
if (user.getCareer() != null && ! user.getCareer().isEmpty()){
// Same as Location
}
return doc;
}