private LockedHttpClient CreateClient()
{
var client = new LockedHttpClient();
client.Timeout = TimeSpan.FromSeconds(Timeout);
client.Locked = true;
_Clients.Add(client);
System.Diagnostics.Debug.WriteLine($"*** {GetType().Name}.{nameof(CheckOut)} - Created new HttpClient: {client.Id}");
return(client);
}
private async Task <LockedHttpClient> GetUsedClientAsync()
{
LockedHttpClient client = null;
while (client == null)
{
// get the first available client
client = _Clients.FirstOrDefault(c => !c.Locked);
if (client == null)
{
await Task.Delay(10);
continue;
}
}
return(client);
}
public async Task <LockedHttpClient> CheckOut()
{
try
{
await _Mutex.WaitAsync();
LockedHttpClient client = null;
if (_Clients.Count < PoolSize)
{
client = CreateClient();
}
else
{
client = await GetUsedClientAsync();
if (client == null)
{
throw new Exception("Could not get a HttpClient.");
}
client.Locked = true;
client.UseCount++;
// client is stale - retire
if (client.Refresh)
{
System.Diagnostics.Debug.WriteLine($"*** {GetType().Name}.{nameof(CheckOut)} - Client is state, refreshing: {client.Id}, used: {client.UseCount}");
_Clients.Remove(client);
client.Dispose();
client = CreateClient();
}
System.Diagnostics.Debug.WriteLine($"*** {GetType().Name}.{nameof(CheckOut)} - Checkout HttpClient: {client.Id}, used: {client.UseCount}");
}
return(client);
}
finally
{
_Mutex.Release();
}
}
public void Checkin(LockedHttpClient client)
{
client.Locked = false;
}
