    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      https://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017package org.apache.commons.dbcp2.managed;
    018
    019import java.sql.Connection;
    020import java.sql.SQLException;
    021import java.util.Objects;
    022
    023import org.apache.commons.dbcp2.PoolingDataSource;
    024import org.apache.commons.pool2.ObjectPool;
    025
    026/**
    027 * The ManagedDataSource is a PoolingDataSource that creates ManagedConnections.
    028 *
    029 * @param <C>
    030 *            The kind of {@link Connection} to manage.
    031 * @since 2.0
    032 */
    033public class ManagedDataSource<C extends Connection> extends PoolingDataSource<C> {
    034    private TransactionRegistry transactionRegistry;
    035
    036    /**
    037     * Creates a ManagedDataSource which obtains connections from the specified pool and manages them using the
    038     * specified transaction registry. The TransactionRegistry must be the transaction registry obtained from the
    039     * XAConnectionFactory used to create the connection pool. If not, an error will occur when attempting to use the
    040     * connection in a global transaction because the XAResource object associated with the connection will be
    041     * unavailable.
    042     *
    043     * @param pool
    044     *            the connection pool
    045     * @param transactionRegistry
    046     *            the transaction registry obtained from the XAConnectionFactory used to create the connection pool
    047     *            object factory
    048     */
    049    public ManagedDataSource(final ObjectPool<C> pool, final TransactionRegistry transactionRegistry) {
    050        super(pool);
    051        this.transactionRegistry = transactionRegistry;
    052    }
    053
    054    @Override
    055    public Connection getConnection() throws SQLException {
    056        if (getPool() == null) {
    057            throw new IllegalStateException("Pool has not been set");
    058        }
    059        if (transactionRegistry == null) {
    060            throw new IllegalStateException("TransactionRegistry has not been set");
    061        }
    062
    063        return new ManagedConnection<>(getPool(), transactionRegistry, isAccessToUnderlyingConnectionAllowed());
    064    }
    065
    066    /**
    067     * Gets the transaction registry.
    068     *
    069     * @return The transaction registry.
    070     * @see #setTransactionRegistry(TransactionRegistry)
    071     * @since 2.6.0
    072     */
    073    public TransactionRegistry getTransactionRegistry() {
    074        return transactionRegistry;
    075    }
    076
    077    /**
    078     * Sets the transaction registry from the XAConnectionFactory used to create the pool. The transaction registry can
    079     * only be set once using either a connector or this setter method.
    080     *
    081     * @param transactionRegistry
    082     *            the transaction registry acquired from the XAConnectionFactory used to create the pool
    083     */
    084    public void setTransactionRegistry(final TransactionRegistry transactionRegistry) {
    085        if (this.transactionRegistry != null) {
    086            throw new IllegalStateException("TransactionRegistry already set");
    087        }
    088        Objects.requireNonNull(transactionRegistry, "transactionRegistry");
    089
    090        this.transactionRegistry = transactionRegistry;
    091    }
    092}