private SpotterBase CreateNextSpotter(string contentType)
{
if (this._capacity != 0 && this._total >= this._capacity)
{
throw new Exception("Out of pool capacity.");
}
var i = SpotterFactory.GetSpotter(contentType);
this._total++;
this._inUse.Add(i);
return(i);
}
/// <summary>
/// Gets spotter from pool. If no spotter is available and capacity is reached exeption is raised.
/// </summary>
/// <param name="contentType">Content type defining wanted spotter.</param>
/// <returns></returns>
public SpotterBase GetSpotter(string contentType)
{
lock (this._lock)
{
if (this.IsFreeOf(SpotterFactory.GetSpotterType(contentType)))
{
return(this.GetFreeSpotter(contentType));
}
else
{
return(this.CreateNextSpotter(contentType));
}
}
}
/// <summary>
/// Returns spotter from pool or waits if no free spotter is available.
/// </summary>
/// <param name="contentType">Content type defining wanted spotter.</param>
/// <returns></returns>
public SpotterBase GetSpotterOrWait(string contentType)
{
lock (this._lock)
{
if (this.IsFreeOf(SpotterFactory.GetSpotterType(contentType)))
{
// Free instances exists
return(this.GetFreeSpotter(contentType));
}
else if (this._total < this._capacity || this._capacity == 0)
{
// No free instances but free capacity
return(this.CreateNextSpotter(contentType));
}
else
{
do
{
Monitor.Wait(this._lock);
} while(this.IsFreeOf(SpotterFactory.GetSpotterType(contentType)));
return(this.GetFreeSpotter(contentType));
}
}
}
/// <summary>
/// Creates new spotter pool with selected capacity.
/// </summary>
/// <param name="capacity">Pool capacity.</param>
public SpotterPool(int capacity)
{
this._capacity = capacity;
this._total = 0;
/* initialize with spotters of all kind if capacity is not limitless */
if (capacity > 0)
{
foreach (var contentType in SpotterFactory.SupportedContent)
{
SpotterBase i = null;
// have to create multipart spotter manualy because it has to be initialized with this pool but it is yet uninitialized in SpotterFactory
i = contentType.StartsWith("multipart/form-data")? new SpotterMultipart(this) : SpotterFactory.GetSpotter(contentType);
this._total++;
this._free.Add(new KeyValuePair <Type, SpotterBase>(i.GetType(), i));
}
}
}
