62 lines
1.6 KiB
C#
62 lines
1.6 KiB
C#
using System;
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using System.Threading;
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using System.Threading.Tasks;
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using Umbraco.Core;
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namespace Umbraco.Web.Scheduling
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{
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public abstract class LatchedBackgroundTaskBase : DisposableObjectSlim, ILatchedBackgroundTask
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{
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private TaskCompletionSource<bool> _latch;
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protected LatchedBackgroundTaskBase()
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{
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_latch = new TaskCompletionSource<bool>();
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}
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/// <summary>
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/// Implements IBackgroundTask.Run().
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/// </summary>
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public virtual void Run()
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{
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throw new NotSupportedException("This task cannot run synchronously.");
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}
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/// <summary>
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/// Implements IBackgroundTask.RunAsync().
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/// </summary>
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public virtual Task RunAsync(CancellationToken token)
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{
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throw new NotSupportedException("This task cannot run asynchronously.");
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}
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/// <summary>
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/// Indicates whether the background task can run asynchronously.
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/// </summary>
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public abstract bool IsAsync { get; }
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public Task Latch => _latch.Task;
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public bool IsLatched => _latch.Task.IsCompleted == false;
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protected void Release()
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{
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_latch.SetResult(true);
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}
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protected void Reset()
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{
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_latch = new TaskCompletionSource<bool>();
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}
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public virtual bool RunsOnShutdown => false;
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// the task is going to be disposed after execution,
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// unless it is latched again, thus indicating it wants to
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// remain active
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protected override void DisposeResources()
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{ }
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}
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}
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