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| import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.SimpleAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.LockObtainFailedException;
import org.apache.lucene.store.jdbc.JdbcDirectory;
import org.apache.lucene.store.jdbc.dialect.PostgreSQLDialect;
import org.apache.lucene.util.Version;
/**
* The Class JDBCIndexer.
*
* @author chaima
*/
public class JDBCIndexer {
/** The jdbc directory. */
private Directory jdbcDirectory = null;
/**
* Instantiates a new jDBC indexer.
*
* @param jdbcDirectory
* the jdbc directory
*/
public JDBCIndexer(Directory jdbcDirectory) {
super();
this.jdbcDirectory = jdbcDirectory;
}
/**
* Gets the jdbc directory.
*
* @return the jdbc directory
*/
public Directory getJdbcDirectory() {
if (jdbcDirectory == null) {
throw new IllegalStateException("Index not yet build, rerun indexing");
}
return jdbcDirectory;
}
/**
* Sets the jdbc directory.
*
* @param jdbcDirectory
* the new jdbc directory
*/
public void setJdbcDirectory(Directory jdbcDirectory) {
this.jdbcDirectory = jdbcDirectory;
}
/**
* Builds the index.
*/
public void buildIndex() {
createAndBuildIndex();
}
/**
* Creates the and build index.
*/
private void createAndBuildIndex() {
createIndexTable();
index();
}
/**
* Index.
*/
private void index() {
Analyzer analyzer = new SimpleAnalyzer(Version.LUCENE_36);
IndexWriterConfig indexWriterConfig = new IndexWriterConfig(Version.LUCENE_36, analyzer);
IndexWriter indexWriter = null;
try {
indexWriter = new IndexWriter(getJdbcDirectory(), analyzer,true, IndexWriter.MaxFieldLength.UNLIMITED);
Boolean locked=indexWriter.isLocked(jdbcDirectory);
System.out.println("locked **** "+locked);
addIndex(indexWriter);
} catch (CorruptIndexException e) {
e.printStackTrace();
} catch (LockObtainFailedException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (indexWriter != null) {
try {
indexWriter.close();
} catch (CorruptIndexException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
indexWriter = null;
}
}
}
}
/**
* Adds some record in BOOKS table
*
* @param indexWriter
* the index writer
*/
private void addIndex(IndexWriter indexWriter) throws CorruptIndexException, IOException {
try {
Connection connection = JDBCDatabaseUtil.getConnection();
connection.setAutoCommit(false);
String query = "SELECT id, name, lastname FROM users";
PreparedStatement pstmt = connection.prepareStatement(query);
ResultSet resultSet = pstmt.executeQuery();
while (resultSet.next()) {
Document document = new Document();
System.out.println("id *** "+resultSet.getInt(1)+"name ****"+resultSet.getString(2)+"lastname **** "+resultSet.getString(3));
System.out.println("auto commit 1*** "+connection.getAutoCommit());
document.add(new Field("id", String.valueOf(resultSet.getInt(1)), Field.Store.YES, Field.Index.ANALYZED));
document.add(new Field("name", String.valueOf(resultSet.getString(2)), Field.Store.YES, Field.Index.ANALYZED));
document.add(new Field("lastname", String.valueOf(resultSet.getString(3)), Field.Store.YES, Field.Index.ANALYZED));
indexWriter.addDocument(document);
System.out.println("auto commit 2*** "+connection.getAutoCommit());
indexWriter.commit();
}
indexWriter.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
/**
* Creates the index table.
*/
private void createIndexTable() {
if (this.jdbcDirectory == null) {
setJdbcDirectory(new MyJDBCDirectory(JDBCDatabaseUtil.getDataSource(), new PostgreSQLDialect(), "LUCENE_INDEX_TABLE"));
}
try {
/**
* No need to manually create index table, create method will
* automatically create it.
*/
boolean existe= ((JdbcDirectory) getJdbcDirectory()).tableExists();
if(existe)
System.out.println("table existe");
else{
System.out.println("table non existe");
((JdbcDirectory) getJdbcDirectory()).create();
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
new JDBCIndexer(null).buildIndex();
}
} |
Probléme : Create Lucene Index in database using JdbcDirectory
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