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ConcurrentDictionary execution test
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| namespace ConsoleApp1 | |
| { | |
| using System; | |
| using System.Collections.Concurrent; | |
| using System.Diagnostics; | |
| using System.Linq; | |
| using System.Threading; | |
| using System.Threading.Tasks; | |
| public class Program | |
| { | |
| public static void Main(string[] args) | |
| { | |
| Console.WriteLine("Test started:"); | |
| ConcurrentReadWriteTest().Wait(); | |
| Console.WriteLine("Press enter to exit"); | |
| Console.ReadLine(); | |
| } | |
| public static async Task ConcurrentReadWriteTest() | |
| { | |
| var dict = new ConcurrentDictionary<string, Metadata>(); | |
| var count = 1000; | |
| dict.TryAdd(string.Empty, new Metadata()); | |
| var updateTasks = Enumerable.Repeat(0, count).Select( | |
| _ => Task.Run( | |
| () => dict.AddOrUpdate( | |
| string.Empty, | |
| (k) => new Metadata(), | |
| (k, v) => | |
| { | |
| // return new Metadata() { Version = v.Version + 1 }; | |
| v.Version++; | |
| return v; | |
| }))); | |
| var deleteTasks = Enumerable.Repeat(0, count).Select( | |
| _ => Task.Run( | |
| () => dict.AddOrUpdate( | |
| string.Empty, | |
| (k) => new Metadata(), | |
| (k, v) => | |
| { | |
| // return new Metadata() { Version = v.Version - 1 }; | |
| v.Version--; | |
| return v; | |
| }))); | |
| await Task.WhenAll(updateTasks); | |
| await Task.WhenAll(deleteTasks); | |
| Metadata result; | |
| while (!dict.TryGetValue(string.Empty, out result)) | |
| { | |
| } | |
| Console.WriteLine($"Results {result.Version}"); | |
| } | |
| private class Metadata | |
| { | |
| public int Version { get; set; } = 0; | |
| } | |
| } | |
| } |
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