#region
/* -----------------------------------------------------------------------
 * <copyright file="AgentLocator.cs" company="GRNet">
 * 
 * Copyright 2011-2012 GRNET S.A. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   1. Redistributions of source code must retain the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer in the documentation and/or other materials
 *      provided with the distribution.
 *
 *
 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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 * POSSIBILITY OF SUCH DAMAGE.
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 * The views and conclusions contained in the software and
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 * or implied, of GRNET S.A.
 * </copyright>
 * -----------------------------------------------------------------------
 */
#endregion
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Pithos.Core.Agents
{
    static class AgentLocator<T> where T:class
    {
        static ConcurrentDictionary<string, WeakReference> _agents = new ConcurrentDictionary<string, WeakReference>();
        public static void Register(T agent,string key)
        {            
            _agents[key] = new WeakReference(agent);
        }

        public static T Get(string key)
        {            
            return _agents[key].Target as T;
        }

        public static bool TryGet(string key, out T value)
        {
            WeakReference target;
            var exists = _agents.TryGetValue(key, out target);            
            value = target.Target as T;
            return exists;
        }

        public static void Remove(string key)
        {
            WeakReference target;
            _agents.TryRemove(key, out target);
        }
    }
}