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//
// MonoMac.CFNetwork.Test.Models.AsyncTaskRunnerController
//
// Authors:
// Martin Baulig (martin.baulig@gmail.com)
//
// Copyright 2012 Xamarin Inc. (http://www.xamarin.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Threading;
using System.Threading.Tasks;
namespace MonoMac.CFNetwork.Test.Models {
public class AsyncTaskRunnerController : AsyncTaskRunner {
public class StateChangedEventArgs : EventArgs {
public bool IsRunning {
get;
private set;
}
public StateChangedEventArgs (bool isRunning)
{
IsRunning = isRunning;
}
}
public event EventHandler<StateChangedEventArgs> StateChangedEvent;
void OnStateChanged (bool running)
{
if (StateChangedEvent != null)
StateChangedEvent (this, new StateChangedEventArgs (running));
}
public static readonly AsyncTaskRunnerController Instance;
public static readonly CheckHeadersRunner CheckHeaders;
public static readonly DownloadDataRunner DownloadData;
public static readonly GetStringRunner GetString;
public static readonly BenchmarkRunner Benchmark;
static AsyncTaskRunnerController ()
{
CheckHeaders = new CheckHeadersRunner ();
DownloadData = new DownloadDataRunner ();
GetString = new GetStringRunner ();
Benchmark = new BenchmarkRunner ();
Instance = new AsyncTaskRunnerController ();
}
AsyncTaskRunner current;
AsyncTaskRunnerController ()
{
SetupEvents (CheckHeaders);
SetupEvents (DownloadData);
SetupEvents (GetString);
SetupEvents (Benchmark);
}
void SetupEvents (AsyncTaskRunner runner)
{
runner.OperationStartedEvent += (sender, e) => {
OnOperationStartedEvent (sender);
};
runner.MessageEvent += (sender, e) => {
OnMessageEvent (sender, e);
};
runner.ResponseEvent += (sender, e) => {
OnResponseEvent (sender, e);
};
runner.ProgressChangedEvent += (sender, e) => {
OnProgressChangedEvent (sender, e);
};
}
public static void Switch (AsyncTaskRunner runner)
{
Instance.current = runner;
}
public override bool CanReportProgress {
get { return current.CanReportProgress; }
}
public override bool CanSendResponse {
get { return current.CanSendResponse; }
}
bool running;
CancellationTokenSource cts;
public async Task Run (Uri uri)
{
if (running)
return;
cts = new CancellationTokenSource ();
running = true;
try {
OnStateChanged (true);
OnOperationStartedEvent (this);
OnMessageEvent ("Loading {0}", uri);
var result = await Run (uri, cts.Token);
if (result != null)
OnMessageEvent (result);
else
OnMessageEvent ("Loaded {0}.", uri);
} catch (TaskCanceledException) {
OnMessageEvent ("Cancelled!");
} catch (Exception ex) {
OnMessageEvent ("ERROR: {0}", ex.Message);
Console.WriteLine ("ERROR: {0}", ex);
} finally {
running = false;
OnStateChanged (false);
cts.Dispose ();
cts = null;
}
}
public void Cancel ()
{
if (cts == null)
return;
try {
cts.Cancel ();
} catch {
;
}
}
internal override Task<string> Run (Uri uri, CancellationToken cancellationToken)
{
return current.Run (uri, cancellationToken);
}
}
}
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