* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cn.escheduler.common.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.sql.*;
public class MysqlUtils {
public static final Logger logger = LoggerFactory.getLogger(MysqlUtils.class);
private static MysqlUtils instance;
MysqlUtils() {
}
public static MysqlUtils getInstance() {
if (null == instance) {
syncInit();
}
return instance;
}
private static synchronized void syncInit() {
if (instance == null) {
instance = new MysqlUtils();
}
}
public void release(ResultSet rs, Statement stmt, Connection conn) {
try {
if (rs != null) {
rs.close();
rs = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(),e);
throw new RuntimeException(e);
} finally {
try {
if (stmt != null) {
stmt.close();
stmt = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(),e);
throw new RuntimeException(e);
} finally {
try {
if (conn != null) {
conn.close();
conn = null;
}
} catch (SQLException e) {
logger.error(e.getMessage(),e);
throw new RuntimeException(e);
}
}
}
}
public static void releaseResource(ResultSet rs, PreparedStatement ps, Connection conn) {
MysqlUtils.getInstance().release(rs,ps,conn);
if (null != rs) {
try {
rs.close();
} catch (SQLException e) {
logger.error(e.getMessage(),e);
}
}
if (null != ps) {
try {
ps.close();
} catch (SQLException e) {
logger.error(e.getMessage(),e);
}
}
if (null != conn) {
try {
conn.close();
} catch (SQLException e) {
logger.error(e.getMessage(),e);
}
}
}
}
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