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An JDBC datasource implementation.
/*
* Copyright 1999-2018 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.util;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.XAConnection;
import org.h2.jdbc.JdbcConnection;
import org.h2.jdbcx.JdbcDataSourceFactory;
import org.h2.jdbcx.JdbcXAConnection;
import org.h2.message.TraceObject;
public class H2Utils {
private static volatile Constructor constructor;
private static volatile Method method;
public static final int XA_DATA_SOURCE = 13;
public static Object createJdbcDataSourceFactory() {
return new JdbcDataSourceFactory();
}
public static XAConnection createXAConnection(Object factory, Connection physicalConn) throws SQLException {
try {
if (constructor == null) {
constructor = JdbcXAConnection.class.getDeclaredConstructor(JdbcDataSourceFactory.class, int.class,
JdbcConnection.class);
constructor.setAccessible(true);
}
int id = getNextId(XA_DATA_SOURCE);
return constructor.newInstance(factory, id, physicalConn);
} catch (Exception e) {
throw new SQLException("createXAConnection error", e);
}
}
public static int getNextId(int type) throws Exception {
if (method == null) {
method = TraceObject.class.getDeclaredMethod("getNextId", int.class);
method.setAccessible(true);
}
return (Integer) method.invoke(null, type);
}
}