/
IndexWriterManager.java
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/
IndexWriterManager.java
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package com.tistory.devyongsik.crescent;
import java.io.File;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.annotation.PostConstruct;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.Version;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
import com.tistory.devyongsik.crescent.collection.entity.CrescentCollection;
import com.tistory.devyongsik.crescent.config.CrescentCollectionHandler;
@Component("indexWriterManager")
public class IndexWriterManager {
private Map<String, IndexWriter> indexWritersByCollectionName = new ConcurrentHashMap<String, IndexWriter>();
private Logger logger = LoggerFactory.getLogger(IndexWriterManager.class);
@Autowired
@Qualifier("crescentCollectionHandler")
private CrescentCollectionHandler collectionHandler;
@PostConstruct
private void initIndexWriter() {
for(CrescentCollection crescentCollection : collectionHandler.getCrescentCollections().getCrescentCollections()) {
logger.info("collection name {}", crescentCollection.getName());
String indexDir = crescentCollection.getIndexingDirectory();
logger.info("index file dir ; {}", indexDir);
Directory dir = null;
try {
if(indexDir.equals("memory")) {
dir = new RAMDirectory();
} else {
dir = FSDirectory.open(new File(indexDir));
}
IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_44, crescentCollection.getIndexingModeAnalyzer());
conf.setOpenMode(OpenMode.CREATE_OR_APPEND);
//conf.setIndexDeletionPolicy(new LastCommitDeletePolicy());
IndexWriter indexWriter = new IndexWriter(dir, conf);
indexWritersByCollectionName.put(crescentCollection.getName(), indexWriter);
logger.info("index writer for collection {} is initialized...", crescentCollection.getName());
}catch(Exception e) {
logger.error("index writer init error", e);
throw new RuntimeException("index writer init error ", e);
}
}
}
public IndexWriter getIndexWriter(String collectionName) {
return indexWritersByCollectionName.get(collectionName);
}
}