本文介绍了使用 JdbcDirectory 在数据库中创建 Lucene 索引的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
我对 MySQL 和 Postgresql9.2 有问题，这就是问题所在:
I have a problem with MySQL and Postgresql9.2 this is the problem :
org.apache.lucene.store.jdbc.JdbcStoreException: Failed to execute sql [insert into LUCENE_INDEX_TABLE (name_, value_, size_, lf_, deleted_) values ( ?, ?, ?, current_timestamp, ? )]; nested exception is org.postgresql.util.PSQLException: Les Large Objects ne devraient pas être utilisés en mode auto-commit.
org.postgresql.util.PSQLException: Les Large Objects ne devraient pas être utilisés en mode auto-commit.
at org.postgresql.largeobject.LargeObjectManager.createLO(LargeObjectManager.java:239)
at org.postgresql.largeobject.LargeObjectManager.createLO(LargeObjectManager.java:226)
at org.postgresql.jdbc2.AbstractJdbc2Statement.setBlob(AbstractJdbc2Statement.java:3048)
at org.apache.lucene.store.jdbc.index.AbstractJdbcIndexOutput$1.fillPrepareStatement(AbstractJdbcIndexOutput.java:55)
at org.apache.lucene.store.jdbc.support.JdbcTemplate.executeUpdate(JdbcTemplate.java:174)
at org.apache.lucene.store.jdbc.index.AbstractJdbcIndexOutput.close(AbstractJdbcIndexOutput.java:47)
at org.apache.lucene.store.jdbc.index.RAMAndFileJdbcIndexOutput.close(RAMAndFileJdbcIndexOutput.java:81)
at org.apache.lucene.util.IOUtils.close(IOUtils.java:141)
at org.apache.lucene.index.FieldsWriter.close(FieldsWriter.java:139)
at org.apache.lucene.index.StoredFieldsWriter.flush(StoredFieldsWriter.java:55)
at org.apache.lucene.index.DocFieldProcessor.flush(DocFieldProcessor.java:59)
at org.apache.lucene.index.DocumentsWriter.flush(DocumentsWriter.java:581)
at org.apache.lucene.index.IndexWriter.doFlush(IndexWriter.java:3587)
at org.apache.lucene.index.IndexWriter.prepareCommit(IndexWriter.java:3376)
at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3485)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3467)
at org.apache.lucene.index.IndexWriter.commit(IndexWriter.java:3451)
at test.lucene.chaima.JDBCIndexer.addIndex(JDBCIndexer.java:137)
at test.lucene.chaima.JDBCIndexer.index(JDBCIndexer.java:92)
at test.lucene.chaima.JDBCIndexer.createAndBuildIndex(JDBCIndexer.java:78)
at test.lucene.chaima.JDBCIndexer.buildIndex(JDBCIndexer.java:69)
at test.lucene.chaima.JDBCIndexer.main(JDBCIndexer.java:172)
org.apache.lucene.store.jdbc.JdbcStoreException: Failed to execute sql [insert into LUCENE_INDEX_TABLE (name_, value_, size_, lf_, deleted_) values ( ?, ?, ?, current_timestamp, ? )]; nested exception is org.postgresql.util.PSQLException: Les Large Objects ne devraient pas être utilisés en mode auto-commit.
org.postgresql.util.PSQLException: Les Large Objects ne devraient pas être utilisés en mode auto-commit.
at org.postgresql.largeobject.LargeObjectManager.createLO(LargeObjectManager.java:239)
at org.postgresql.largeobject.LargeObjectManager.createLO(LargeObjectManager.java:226)
at org.postgresql.jdbc2.AbstractJdbc2Statement.setBlob(AbstractJdbc2Statement.java:3048)
at org.apache.lucene.store.jdbc.index.AbstractJdbcIndexOutput$1.fillPrepareStatement(AbstractJdbcIndexOutput.java:55)
at org.apache.lucene.store.jdbc.support.JdbcTemplate.executeUpdate(JdbcTemplate.java:174)
at org.apache.lucene.store.jdbc.index.AbstractJdbcIndexOutput.close(AbstractJdbcIndexOutput.java:47)
at org.apache.lucene.store.jdbc.index.RAMAndFileJdbcIndexOutput.close(RAMAndFileJdbcIndexOutput.java:81)
at org.apache.lucene.store.ChecksumIndexOutput.close(ChecksumIndexOutput.java:61)
at org.apache.lucene.index.SegmentInfos.finishCommit(SegmentInfos.java:863)
at org.apache.lucene.index.IndexWriter.finishCommit(IndexWriter.java:3501)
at org.apache.lucene.index.IndexWriter.commitInternal(IndexWriter.java:3490)
at org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1873)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1812)
at org.apache.lucene.index.IndexWriter.close(IndexWriter.java:1776)
at test.lucene.chaima.JDBCIndexer.index(JDBCIndexer.java:102)
at test.lucene.chaima.JDBCIndexer.createAndBuildIndex(JDBCIndexer.java:78)
at test.lucene.chaima.JDBCIndexer.buildIndex(JDBCIndexer.java:69)
at test.lucene.chaima.JDBCIndexer.main(JDBCIndexer.java:172)
org.apache.lucene.index.IndexNotFoundException: no segments* file found in test.lucene.chaima.MyJDBCDirectory@9506dc4 lockFactory=null: files: [write.lock]
at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:667)
at org.apache.lucene.index.DirectoryReader.open(DirectoryReader.java:72)
at org.apache.lucene.index.IndexReader.open(IndexReader.java:256)
at test.lucene.chaima.JDBCSearcher.search(JDBCSearcher.java:56)
at test.lucene.chaima.JDBCIndexer.buildIndex(JDBCIndexer.java:70)
at test.lucene.chaima.JDBCIndexer.main(JDBCIndexer.java:172)
我找到了很多解决方案，但没有人解决我的问题如果有人可以帮助我，我需要解决方案谢谢.我把我的应用程序的源代码放在这里:我有 3 个类
i found many solution but no one solve my problem please i need the solution if any one can help me thanks. I put here the source code of my application : i have 3 classes
MyJDBCDirectory.java
MyJDBCDirectory.java
package test.lucene.chaima;
import java.io.IOException;
import javax.sql.DataSource;
import org.apache.lucene.store.jdbc.JdbcDirectory;
import org.apache.lucene.store.jdbc.JdbcDirectorySettings;
import org.apache.lucene.store.jdbc.JdbcStoreException;
import org.apache.lucene.store.jdbc.dialect.Dialect;
import org.apache.lucene.store.jdbc.support.JdbcTable;
/**
* The Class MyJDBCDirectory.
*
* @author prabhat.jha
*/
public class MyJDBCDirectory extends JdbcDirectory {
/**
* Instantiates a new my jdbc directory.
*
* @param dataSource
* the data source
* @param dialect
* the dialect
* @param settings
* the settings
* @param tableName
* the table name
*/
public MyJDBCDirectory(DataSource dataSource, Dialect dialect, JdbcDirectorySettings settings, String tableName) {
super(dataSource, dialect, settings, tableName);
}
/**
* Instantiates a new my jdbc directory.
*
* @param dataSource the data source
* @param dialect the dialect
* @param tableName the table name
*/
public MyJDBCDirectory(DataSource dataSource, Dialect dialect, String tableName) {
super(dataSource, dialect, tableName);
}
/**
* Instantiates a new my jdbc directory.
*
* @param dataSource the data source
* @param settings the settings
* @param tableName the table name
* @throws JdbcStoreException the jdbc store exception
*/
public MyJDBCDirectory(DataSource dataSource, JdbcDirectorySettings settings, String tableName) throws JdbcStoreException {
super(dataSource, settings, tableName);
}
/**
* Instantiates a new my jdbc directory.
*
* @param dataSource the data source
* @param table the table
*/
public MyJDBCDirectory(DataSource dataSource, JdbcTable table) {
super(dataSource, table);
}
/**
* Instantiates a new my jdbc directory.
*
* @param dataSource the data source
* @param tableName the table name
* @throws JdbcStoreException the jdbc store exception
*/
public MyJDBCDirectory(DataSource dataSource, String tableName) throws JdbcStoreException {
super(dataSource, tableName);
}
/**
* (non-Javadoc).
*
* @return the string[]
* @throws IOException Signals that an I/O exception has occurred.
* @see org.apache.lucene.store.Directory#listAll()
*/
@Override
public String[] listAll() throws IOException {
return super.list();
}
}
JDBCDatabaseUtil.java
JDBCDatabaseUtil.java
package test.lucene.chaima;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.postgresql.ds.PGPoolingDataSource;
import org.postgresql.ds.PGSimpleDataSource;
//import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
/**
* The Class JDBCDatabaseUtil.
* @author prabhat.jha
*/
public class JDBCDatabaseUtil {
/**
* Gets the data source.
*
* @return the data source
*/
public static DataSource getDataSource() {
PGSimpleDataSource dataSource = new PGSimpleDataSource();
dataSource.setUser("postgres");
dataSource.setPassword("root");
dataSource.setDatabaseName("postgres");
/*MysqlDataSource dataSource = new MysqlDataSource();
dataSource.setUser("root");
dataSource.setPassword("root");
dataSource.setEmulateLocators(true);
dataSource.setUrl("jdbc:mysql://localhost:3306/lucene?emulateLocators=true&useUnicode=true&characterEncoding=UTF-8&useFastDateParsing=false");
*/
return dataSource;
}
/**
* Gets the connection.
*
* @return the connection
* @throws SQLException
* the sQL exception
*/
public static Connection getConnection() throws SQLException {
//getDataSource().getConnection().setAutoCommit(false);
return getDataSource().getConnection();
}
}
JDBCIndexer.java
JDBCIndexer.java
package test.lucene.chaima;
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);
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;
}
}
}
}
/**
*
*
* @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();
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);
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();
}
}
和表用户:
CREATE TABLE users
(
id integer NOT NULL,
name character(20),
lastname character(20),
CONSTRAINT pk_id PRIMARY KEY (id)
)
WITH (
OIDS=FALSE
);
ALTER TABLE users
OWNER TO postgres;
还有罐子:
commons-logging-1.0.4.jar
compass-2.2.0.jar
lucene-core-3.6.1.jar
postgresql-9.2-1002.jdbc4.jar
推荐答案
我已经创建了自己的 JdbcDirectory 实现，尽管它会依赖 JEE6 来利用 @Singleton 注释.代码本身并不是太简单，无法粘贴到 StackOverflow 帖子中，它仍然有一些限制.关键部分是由于数据库锁定语义，您不能使用多个线程对单个事务执行多个操作.
I have created my own JdbcDirectory implementation, though it would rely on JEE6 to take advantage of the @Singleton annotation. The code itself isn't too trivial to paste into a StackOverflow post and it still has a few limitations. Key part being you cannot do multiple operations on a single transaction using multiple threads because of the database locking semantics.
https://github.com/trajano/doxdb/tree/jdbc-directory-example/doxdb-ejb/src/main/java/net/trajano/doxdb/search/lucene
查看您的实现，您似乎还保留了已删除的文件"，这可能是因为它在数据库存储中的碎片较少，而我的已删除记录本身.
Looking at your implementation, it seems like you're also keeping the deleted "files" probably because it would have less fragmentation on the database store, whereas mine I had removed the record itself.
我已经标记了一个我正在使用的版本，它对于我的测试负载来说似乎足够稳定.随时提出意见或建议.
I have tagged a version that I am working with which seems stable enough for my test loads. Feel free to make comments or suggestions on it.
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