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Viewing changes to external/monomac/samples/CFNetwork/Models/AsyncTaskRunnerController.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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