/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2010 Sun Microsystems, Inc.
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*/
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package org.opends.sdk;
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import com.sun.opends.sdk.util.CompletedFutureResult;
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import com.sun.opends.sdk.util.Validator;
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/**
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* A load balancing connection factory allocates connections using the provided
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* algorithm.
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*/
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final class LoadBalancer extends AbstractConnectionFactory
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{
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private final LoadBalancingAlgorithm algorithm;
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/**
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* Creates a new load balancer using the provided algorithm.
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*
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* @param algorithm
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* The load balancing algorithm which will be used to obtain the next
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* connection factory.
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*/
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public LoadBalancer(final LoadBalancingAlgorithm algorithm)
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{
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Validator.ensureNotNull(algorithm);
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this.algorithm = algorithm;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public FutureResult<AsynchronousConnection> getAsynchronousConnection(
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final ResultHandler<? super AsynchronousConnection> resultHandler)
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{
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final ConnectionFactory factory;
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try
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{
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factory = algorithm.getConnectionFactory();
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}
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catch (final ErrorResultException e)
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{
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if (resultHandler != null)
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{
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resultHandler.handleErrorResult(e);
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}
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return new CompletedFutureResult<AsynchronousConnection>(e);
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}
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return factory.getAsynchronousConnection(resultHandler);
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}
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/**
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* {@inheritDoc}
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*/
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public String toString()
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{
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final StringBuilder builder = new StringBuilder();
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builder.append("LoadBalancer(");
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builder.append(String.valueOf(algorithm));
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builder.append(')');
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return builder.toString();
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}
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}
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