/*
 * 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.ode.il.dbutil;


import javax.sql.DataSource;
import javax.transaction.TransactionManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.geronimo.connector.outbound.GenericConnectionManager;
import org.apache.geronimo.connector.outbound.connectionmanagerconfig.LocalTransactions;
import org.apache.geronimo.connector.outbound.connectionmanagerconfig.PoolingSupport;
import org.apache.geronimo.connector.outbound.connectionmanagerconfig.SinglePool;
import org.apache.geronimo.connector.outbound.connectionmanagerconfig.TransactionSupport;
import org.apache.geronimo.connector.outbound.connectiontracking.ConnectionTracker;
import org.apache.geronimo.connector.outbound.connectiontracking.ConnectionTrackingCoordinator;
import org.apache.geronimo.transaction.manager.RecoverableTransactionManager;
import org.apache.ode.il.config.OdeConfigProperties;
import org.apache.ode.il.txutil.TxManager;
import org.tranql.connector.jdbc.JDBCDriverMCF;

public class DatabaseConnectionManager {

  private static final long serialVersionUID = 1L;
  private static final Log __log = LogFactory.getLog(DatabaseConnectionManager.class);
  private static final Messages __msgs = Messages.getMessages(Messages.class);
  private static final int CONNECTION_MAX_WAIT_MILLIS = 30000;
  private static final int CONNECTION_MAX_IDLE_MINUTES = 5;
  private GenericConnectionManager _connectionManager;
  private TransactionManager _txm = null;
  private String _url = null;
  private OdeConfigProperties _odeConfig = null;
  private DataSource _dataSource = null;

  public DatabaseConnectionManager(TransactionManager txm, OdeConfigProperties odeConfig) {
    _txm = txm;
    _odeConfig = odeConfig;
  }

  public void init(String url, String driverClass, String username, String password) throws DatabaseConfigException {
    __log.debug("Creating connection pool for " + url + " with driver " + driverClass);

    if (!(_txm instanceof RecoverableTransactionManager)) {
      throw new RuntimeException("TransactionManager is not recoverable.");
    }

    _url = url;
    TransactionSupport transactionSupport = LocalTransactions.INSTANCE;
    ConnectionTracker connectionTracker = new ConnectionTrackingCoordinator();

    PoolingSupport poolingSupport = new SinglePool(
            _odeConfig.getPoolMaxSize(),
            _odeConfig.getPoolMinSize(),
            CONNECTION_MAX_WAIT_MILLIS,
            CONNECTION_MAX_IDLE_MINUTES,
            true, // match one
            false, // match all
            false); // select one assume match

    _connectionManager = new GenericConnectionManager(
            transactionSupport,
            poolingSupport,
            null,
            connectionTracker,
            (RecoverableTransactionManager) _txm,
            getClass().getName(),
            getClass().getClassLoader());

    JDBCDriverMCF mcf = new JDBCDriverMCF();
    try {
      mcf.setDriver(driverClass);
      mcf.setConnectionURL(url);
      if (username != null) {
        mcf.setUserName(username);
      }
      if (password != null) {
        mcf.setPassword(password);
      }
      _connectionManager.doStart();
      _dataSource = (DataSource) mcf.createConnectionFactory(_connectionManager);
    } catch (Exception ex) {
      String errmsg = __msgs.msgOdeDbPoolStartupFailed(url);
      __log.error(errmsg, ex);
      throw new DatabaseConfigException(errmsg, ex);
    }
  }

  public void shutdown() throws DatabaseConfigException {
    try {
      _connectionManager.doStop();
    } catch (Exception ex) {
      String errmsg = __msgs.msgOdeDbPoolStartupFailed(_url);
      __log.error(errmsg, ex);
      throw new DatabaseConfigException(errmsg, ex);
    }
  }

  public DataSource getDataSource() {
    return _dataSource;
  }
}