﻿// Copyright 2010 Chris Patterson
//  
// Licensed 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.
namespace Stact.Internal
{
    using System;
    using Magnum.Caching;


    /// <summary>
    /// Keeps track of a keyed fiber collection
    /// </summary>
    /// <typeparam name="TKey"></typeparam>
    public class KeyedFiberProvider<TKey> :
        FiberProvider<TKey>
    {
        readonly Cache<TKey, Fiber> _cache;
        readonly TimeSpan _timeout;

        public KeyedFiberProvider(FiberFactory missingFiberFactory, TimeSpan timeout)
        {
            _timeout = timeout;
            _cache = new ConcurrentCache<TKey, Fiber>(k => missingFiberFactory());
        }

        public Fiber GetFiber(TKey key)
        {
            return _cache[key];
        }

        public void Dispose()
        {
            _cache.Each(x => x.Shutdown(_timeout));
        }
    }
}