Commons DBCP example source code file (PoolableManagedConnectionFactory.java)

This example Commons DBCP source code file (PoolableManagedConnectionFactory.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons DBCP tags/keywords

boolean, connection, connection, jdbc, keyedobjectpool, keyedobjectpoolfactory, objectpool, objectpool, poolableconnectionfactory, poolablemanagedconnectionfactory, poolablemanagedconnectionfactory, poolingconnection, sql, string, string, transactionregistry, util

The Commons DBCP PoolableManagedConnectionFactory.java source code

/*
 * 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.dbcp.managed;
import java.sql.Connection;
import java.util.Collection;

import org.apache.commons.dbcp.AbandonedConfig;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.PoolingConnection;
import org.apache.commons.pool.KeyedObjectPool;
import org.apache.commons.pool.KeyedObjectPoolFactory;
import org.apache.commons.pool.ObjectPool;

/**
 * A {@link PoolableConnectionFactory} that creates {@link PoolableManagedConnection}s.
 * 
 * @version $Revision$ $Date$
 */
public class PoolableManagedConnectionFactory extends PoolableConnectionFactory {

    /** Transaction registry associated with connections created by this factory */
    private final TransactionRegistry transactionRegistry;
    
    /**
     * Create a PoolableManagedConnectionFactory and attach it to a connection pool.
     * 
     * @param connFactory XAConnectionFactory
     * @param pool connection pool 
     * @param stmtPoolFactory the {@link KeyedObjectPoolFactory} to use to create {@link KeyedObjectPool}s for pooling
     * {@link java.sql.PreparedStatement}s, or <tt>null to disable {@link java.sql.PreparedStatement} pooling
     * @param validationQuery a query to use to {@link #validateObject validate} {@link Connection}s.
     * Should return at least one row. Using <tt>null turns off validation.
     * @param defaultReadOnly the default "read only" setting for borrowed {@link Connection}s
     * @param defaultAutoCommit the default "auto commit" setting for returned {@link Connection}s
     */
    public PoolableManagedConnectionFactory(XAConnectionFactory connFactory,
            ObjectPool pool, KeyedObjectPoolFactory stmtPoolFactory,
            String validationQuery, boolean defaultReadOnly,
            boolean defaultAutoCommit) {
        super(connFactory, pool, stmtPoolFactory, validationQuery,
                defaultReadOnly, defaultAutoCommit);
        this.transactionRegistry = connFactory.getTransactionRegistry();
    }
    
    /**
     * Create a PoolableManagedConnectionFactory and attach it to a connection pool.
     * 
     * @param connFactory XAConnectionFactory
     * @param pool connection pool 
     * @param stmtPoolFactory the {@link KeyedObjectPoolFactory} to use to create {@link KeyedObjectPool}s for pooling
     * {@link java.sql.PreparedStatement}s, or <tt>null to disable {@link java.sql.PreparedStatement} pooling
     * @param validationQuery a query to use to {@link #validateObject validate} {@link Connection}s.
     * Should return at least one row. Using <tt>null turns off validation.
     * @param validationQueryTimeout the number of seconds that validation queries will wait for database response
     * before failing. Use a value less than or equal to 0 for no timeout.
     * @param connectionInitSqls a Collection of SQL statements to initialize {@link Connection}s.
     * Using <tt>null turns off initialization.
     * @param defaultReadOnly the default "read only" setting for borrowed {@link Connection}s
     * @param defaultAutoCommit the default "auto commit" setting for returned {@link Connection}s
     * @param defaultTransactionIsolation the default "Transaction Isolation" setting for returned {@link Connection}s
     * @param defaultCatalog the default "catalog" setting for returned {@link Connection}s
     * @param config the AbandonedConfig if tracing SQL objects
     */
    public PoolableManagedConnectionFactory(XAConnectionFactory connFactory,
            ObjectPool pool,
            KeyedObjectPoolFactory stmtPoolFactory,
            String validationQuery,
            int validationQueryTimeout,
            Collection connectionInitSqls,
            Boolean defaultReadOnly,
            boolean defaultAutoCommit,
            int defaultTransactionIsolation,
            String defaultCatalog,
            AbandonedConfig config) {
        super(connFactory, pool, stmtPoolFactory, validationQuery, validationQueryTimeout, connectionInitSqls,
                defaultReadOnly, defaultAutoCommit, defaultTransactionIsolation, defaultCatalog, config);
        this.transactionRegistry = connFactory.getTransactionRegistry();
    }

    /**
     * Uses the configured XAConnectionFactory to create a {@link PoolableManagedConnection}.
     * Throws <code>IllegalStateException if the connection factory returns null.
     * Also initializes the connection using configured initialization sql (if provided)
     * and sets up a prepared statement pool associated with the PoolableManagedConnection
     * if statement pooling is enabled.
     */
    synchronized public Object makeObject() throws Exception {
        Connection conn = _connFactory.createConnection();
        if (conn == null) {
            throw new IllegalStateException("Connection factory returned null from createConnection");
        }
        initializeConnection(conn);
        if(null != _stmtPoolFactory) {
            KeyedObjectPool stmtpool = _stmtPoolFactory.createPool();
            conn = new PoolingConnection(conn,stmtpool);
            stmtpool.setFactory((PoolingConnection)conn);
        }
        return new PoolableManagedConnection(transactionRegistry,conn,_pool,_config);
    }

}