task-executor 2.0.4

TaskExecutor

TaskExecutor is a .NET 8.0 library that provides a concurrency-controlled task execution framework. It allows you to enqueue tasks and execute them with a specified level of concurrency.

This library implements the Active Object design pattern, which decouples method execution from method invocation to enhance concurrency and simplify synchronized access to shared resources.

Features

• Limited Concurrent Tasks: Restrict the number of tasks running simultaneously.
• Automatic Task Execution: Automatically start a new task as soon as one completes.
• Concurrency Control: Dynamically adjust the number of concurrent tasks.
• Task Queue: Enqueue tasks with unique IDs and execute them asynchronously.
• Error Handling: Capture and handle task-specific errors via an event.
• Graceful Shutdown: Stop the executor and wait for running tasks to complete.

Getting Started

Prerequisites

• .NET 8.0 SDK

Installation via NuGet

You can install the TaskExecutor library via NuGet Package Manager: dotnet add package task-executor Or add the following to your .csproj file: <PackageReference Include="task-executor" Version="*" /> Replace * with the desired version.

Using the Library

To use the TaskExecutor library in your project:

1. Add a reference to the TaskExecutor project or include the compiled DLL in your application.
2. Create an instance of the TaskExecutor class and configure it as needed.

Example Test Application

A test application is included in the repository to demonstrate how to use the TaskExecutor library. The test application is located in the TaskExecutorApp project.

Running the Test Application

1. Open a terminal in the project directory.
2. Build the solution: dotnet build
3. Run the test application: dotnet run --project TaskExecutorApp

Example Code

The Program.cs file in the TaskExecutorApp project demonstrates how to use the TaskExecutor library:

var cts = new CancellationTokenSource();
using var executor = new TaskExecutor.TaskExecutor(3, cts.Token);

executor.OnTaskError += (id, ex) => Console.WriteLine($"Task {id} error: {ex.Message}");

for (int i = 0; i < 20; i++)
{
    int id = i;
    executor.EnqueueTask(id, async () =>
    {
        Console.WriteLine($"Task {id} started");
        await Task.Delay(Random.Shared.Next(2000, 5000));
        Console.WriteLine($"Task {id} finished");
    });
}

await Task.Delay(1000);

while (executor.HasRunningTasks)
{
    await Task.Delay(1000);
}
await executor.StopAsync();

Project Structure

• TaskExecutor/: Contains the TaskExecutor library source code.
  • TaskExecutor.cs: Core implementation of the TaskExecutor class.
  • TaskForExecute.cs: Represents a task with an ID and a function to execute.
• TaskExecutorApp/: Test application demonstrating the usage of the TaskExecutor library.
  • Program.cs: Example usage of the TaskExecutor.
• TaskExecutor.sln: Solution file for building the library and test application.

License

MIT License

Copyright (c) 2025 Serhiy Krasovskyy xhunter74@gmail.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.