/// <summary>
/// This constructor should be used for asynchronous resource creation
/// </summary>
/// <param name="resourceTaskFactory">Function to create a task that returns a resource</param>
/// <param name="options"></param>
public AsyncResourcePool(Func <Task <TResource> > resourceTaskFactory, AsyncResourcePoolOptions options)
{
_minNumResources = options.MinNumResources;
_maxNumResources = options.MaxNumResources;
_resourcesExpireAfter = options.ResourcesExpireAfter;
_maxNumResourceCreationAttempts = options.MaxNumResourceCreationAttempts;
_resourceCreationRetryInterval = options.ResourceCreationRetryInterval;
_availableResources = new Queue <TimestampedResource>();
_pendingResourceRequests = new Queue <ResourceRequestMessage>();
_resourceTaskFactory = resourceTaskFactory;
// Important: These functions must be called after all instance members have been initialised!
_messageHandler = GetMessageHandler();
SetupErrorHandling();
SetupPeriodicPurge();
_messageHandler.Post(new EnsureAvailableResourcesMessage());
}
/// <summary>
/// This constructor should be used only if asynchronous resource creation is not available
/// </summary>
/// <param name="resourceFactory">Function to create a resource</param>
/// <param name="options"></param>
public AsyncResourcePool(Func <TResource> resourceFactory, AsyncResourcePoolOptions options)
: this(() => Task.FromResult(resourceFactory()), options)
{
}