DYN-8045: Fix hanged node search when the user types faster than search #15733
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| using System; | ||
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| namespace Dynamo.Wpf.Utilities | ||
| { | ||
| public static class JobDebouncer | ||
|
There was a problem hiding this comment.
There was a problem hiding this comment. I would not make this public. |
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| { | ||
| public class DebounceQueueToken | ||
| { | ||
| public long LastExecutionId = 0; | ||
| public SerialQueue SerialQueue = new(); | ||
| }; | ||
| /// <summary> | ||
| /// Action <paramref name="job"/> is guaranteed to run at most once for every call, and exactly once after the last call. | ||
| /// Execution is sequential, and optional jobs that share a <see cref="DebounceQueueToken"/> with a newer optional job will be ignored. | ||
| /// </summary> | ||
| /// <param name="job"></param> | ||
| /// <param name="token"></param> | ||
| /// <returns></returns> | ||
| public static void EnqueueOptionalJobAsync(Action job, DebounceQueueToken token) | ||
| { | ||
| lock (token) | ||
| { | ||
| token.LastExecutionId++; | ||
| var myExecutionId = token.LastExecutionId; | ||
| token.SerialQueue.DispatchAsync(() => | ||
| { | ||
| if (myExecutionId < token.LastExecutionId) return; | ||
| job(); | ||
| }); | ||
| } | ||
| } | ||
| public static void EnqueueMandatoryJobAsync(Action job, DebounceQueueToken token) | ||
| { | ||
| lock (token) | ||
| { | ||
| token.SerialQueue.DispatchAsync(() => | ||
| { | ||
| job(); | ||
| }); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| //https://github.com/gentlee/SerialQueue/blob/master/SerialQueue/SerialQueue.cs | ||
|
There was a problem hiding this comment. @QilongTang do we need to update the about box for this? |
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| using System; | ||
| using System.Threading; | ||
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|
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| namespace Dynamo.Wpf.Utilities | ||
| { | ||
| public class SerialQueue | ||
|
There was a problem hiding this comment. same here - internal unless theres a good reason. |
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| { | ||
| class LinkedListNode(Action action) | ||
| { | ||
| public readonly Action Action = action; | ||
| public LinkedListNode Next; | ||
| } | ||
|
|
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| public event Action<Action, Exception> UnhandledException = delegate { }; | ||
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| private LinkedListNode _queueFirst; | ||
| private LinkedListNode _queueLast; | ||
| private bool _isRunning = false; | ||
|
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| public void DispatchAsync(Action action) | ||
| { | ||
| var newNode = new LinkedListNode(action); | ||
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| lock (this) | ||
| { | ||
| if (_queueFirst == null) | ||
| { | ||
| _queueFirst = newNode; | ||
| _queueLast = newNode; | ||
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| if (!_isRunning) | ||
| { | ||
| _isRunning = true; | ||
| ThreadPool.QueueUserWorkItem(Run); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| _queueLast!.Next = newNode; | ||
| _queueLast = newNode; | ||
| } | ||
| } | ||
| } | ||
|
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| private void Run(object _) | ||
| { | ||
| while (true) | ||
| { | ||
| LinkedListNode firstNode; | ||
|
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| lock (this) | ||
| { | ||
| if (_queueFirst == null) | ||
| { | ||
| _isRunning = false; | ||
| return; | ||
| } | ||
| firstNode = _queueFirst; | ||
| _queueFirst = null; | ||
| _queueLast = null; | ||
| } | ||
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| while (firstNode != null) | ||
| { | ||
| var action = firstNode.Action; | ||
| firstNode = firstNode.Next; | ||
| try | ||
| { | ||
| action(); | ||
| } | ||
| catch (Exception error) | ||
| { | ||
| UnhandledException.Invoke(action, error); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
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is this still required in addition to the search operations taking a lock out on the queue token?