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Apache Commons DBCP software implements Database Connection Pooling

There is a newer version: 2.12.0

/**
 *
 * 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 org.apache.commons.dbcp2.managed;

import org.apache.commons.dbcp2.ConnectionFactory;

import java.sql.Connection;
import java.sql.SQLException;

/**
 * XAConnectionFactory is an extension of ConnectionFactory used to create connections
 * in a transaction managed environment.  The XAConnectionFactory opperates like a normal
 * ConnectionFactory except an TransactionRegistry is provided from which the XAResource
 * for a connection can be obtained.  This allows the existing DBCP pool code to work with
 * XAConnections and gives a the ManagedConnection a way to enlist a connection in the
 * the transaction.
 *
 * @author Dain Sundstrom
 * @author Rodney Waldhoff
 * @since 2.0
 */
public interface XAConnectionFactory extends ConnectionFactory {
    /**
     * Gets the TransactionRegistry for this connection factory which contains a the
     * XAResource for every connection created by this factory.
     *
     * @return the transaction registry for this connection factory
     */
    TransactionRegistry getTransactionRegistry();

    /**
     * Create a new {@link java.sql.Connection} in an implementation specific fashion.
     * 
     * An implementation can assume that the caller of this will wrap the connection in
     * a proxy that protects access to the setAutoCommit, commit and rollback when
     * enrolled in a XA transaction.
     *
     * @return a new {@link java.sql.Connection}
     * @throws java.sql.SQLException if a database error occurs creating the connection
     */
    @Override
    Connection createConnection() throws SQLException;
}