bitronix.tm.resource.jdbc.JdbcClassHelper Maven / Gradle / Ivy
/*
* Copyright (C) 2006-2013 Bitronix Software (http://www.bitronix.be)
*
* 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 bitronix.tm.resource.jdbc;
import bitronix.tm.internal.LogDebugCheck;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
public class JdbcClassHelper
{
private static final java.util.logging.Logger log = java.util.logging.Logger.getLogger(JdbcClassHelper.class.toString());
private static final int DETECTION_TIMEOUT = 5; // seconds
private static final Map, Integer> connectionClassVersions = new ConcurrentHashMap<>();
private static final Map, Method> isValidMethods = new ConcurrentHashMap<>();
private JdbcClassHelper()
{
//No config required
}
/**
* Method getIsValidMethod ...
*
* @param connection
* of type Connection
*
* @return Method
*/
public static Method getIsValidMethod(Connection connection)
{
detectJdbcVersion(connection);
return isValidMethods.get(connection.getClass());
}
/**
* Method detectJdbcVersion ...
*
* @param connection
* of type Connection
*
* @return int
*/
public static int detectJdbcVersion(Connection connection)
{
@SuppressWarnings("unchecked")
Class connectionClass = (Class) connection.getClass();
Integer jdbcVersionDetected = connectionClassVersions.get(connectionClass);
if (jdbcVersionDetected != null)
{
return jdbcVersionDetected;
}
try
{
Method isValidMethod = connectionClass.getMethod("isValid", Integer.TYPE);
isValidMethod.invoke(connection, DETECTION_TIMEOUT); // test invoke
jdbcVersionDetected = 4;
isValidMethods.put(connectionClass, isValidMethod);
}
catch (Exception | AbstractMethodError ex)
{
log.log(Level.FINEST, "NOT JDBC 4 : " + connectionClass, ex);
jdbcVersionDetected = 3;
}
connectionClassVersions.put(connectionClass, jdbcVersionDetected);
if (LogDebugCheck.isDebugEnabled())
{
log.finer("detected JDBC connection class '" + connectionClass + "' is version " + jdbcVersionDetected + " type");
}
return jdbcVersionDetected;
}
}