/*
* Copyright 1999-2017 Alibaba Group Holding Ltd.
*
* Licensed 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 com.alibaba.druid.pool;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Properties;
import com.alibaba.druid.util.JdbcUtils;
/**
* @author wenshao [szujobs@hotmail.com]
* @since 0.2.21
*/
public class ValidConnectionCheckerAdapter implements ValidConnectionChecker {
@Override
public boolean isValidConnection(Connection conn, String query, int validationQueryTimeout) throws Exception {
if (query == null || query.length() == 0) {
return true;
}
Statement stmt = null;
ResultSet rs = null;
try {
stmt = conn.createStatement();
if (validationQueryTimeout > 0) {
stmt.setQueryTimeout(validationQueryTimeout);
}
rs = stmt.executeQuery(query);
return true;
} finally {
JdbcUtils.close(rs);
JdbcUtils.close(stmt);
}
}
@Override
public void configFromProperties(Properties properties) {
}
}