/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE
 * or https://OpenDS.dev.java.net/OpenDS.LICENSE.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at
 * trunk/opends/resource/legal-notices/OpenDS.LICENSE.  If applicable,
 * add the following below this CDDL HEADER, with the fields enclosed
 * by brackets "[]" replaced with your own identifying information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2010 Sun Microsystems, Inc.
 */

package org.opends.sdk;



import com.sun.opends.sdk.util.AbstractFutureResult;
import com.sun.opends.sdk.util.Validator;



/**
 * A load balancing connection factory allocates connections using the provided
 * algorithm.
 */
final class LoadBalancingConnectionFactory extends AbstractConnectionFactory
{
  private final LoadBalancingAlgorithm algorithm;



  public LoadBalancingConnectionFactory(final LoadBalancingAlgorithm algorithm)
  {
    Validator.ensureNotNull(algorithm);
    this.algorithm = algorithm;
  }



  @Override
  public FutureResult<AsynchronousConnection> getAsynchronousConnection(
      final ResultHandler<? super AsynchronousConnection> resultHandler)
  {
    ConnectionFactory factory;

    try
    {
      factory = algorithm.getNextConnectionFactory();
    }
    catch (final ErrorResultException e)
    {
      final AbstractFutureResult<AsynchronousConnection> future =
        new AbstractFutureResult<AsynchronousConnection>(resultHandler)
      {
        public int getRequestID()
        {
          return -1;
        }
      };

      future.handleErrorResult(e);
      return future;
    }

    return factory.getAsynchronousConnection(resultHandler);
  }
}