public Task <MiningResultDto> RentTimeOnLocalMiningServerTask(string authToken, int requestedIterations)
{
if (!AuthorizeTheToken(authToken))
{
throw new Exception("Failed Authorization");
}
var tcs = new TaskCompletionSource <MiningResultDto>();
var result = new MiningResultDto();
var startTime = DateTime.UtcNow;
var localMiningTaskList = new List <Task <MiningResultDto> >();
for (int i = 0; i < 3; i++)
{
Task <MiningResultDto> task = Task.Run(() => RentTimeOnLocalMiningServer("SecretToken", 4));
localMiningTaskList.Add(task);
}
var localMiningArray = localMiningTaskList.ToArray();
Task.WaitAll(localMiningArray);
foreach (var task in localMiningArray)
{
result.MiningText += task.Result.MiningText + Environment.NewLine;
}
result.ElapsedSeconds = (DateTime.UtcNow - startTime).TotalSeconds;
tcs.SetResult(result);
return(tcs.Task);
}
public async Task LaunchMiningMethodLocalAsync()
{
MiningResultDto result = await RentTimeOnLocalMiningServerTask("SecretToken", 5);
Console.WriteLine($"mining result: {result.MiningText}");
Console.WriteLine($"Elapsed seconds: {result.ElapsedSeconds:N}");
}
public async Task <MiningResultDto> RentTimeOnMiningServerAsync(string authToken, int requestedAmount, CancellationToken cancellationToken)
{
if (!AuthorizeTheToken(authToken))
{
throw new Exception("Failed Authorization");
}
Thread.Sleep(1500);
var result = new MiningResultDto();
var startTime = DateTime.UtcNow;
var asyncTask = CallCoinServiceAsync(requestedAmount);
if (cancellationToken.IsCancellationRequested)
{
cancellationToken.ThrowIfCancellationRequested();
}
var coinResult = await asyncTask;
var elapsedSeconds = (DateTime.UtcNow - startTime).TotalSeconds;
result.ElapsedSeconds = elapsedSeconds;
result.MiningText = coinResult;
return(result);
}
public async Task LaunchMiningMethodAsync()
{
MiningResultDto result = await RentTimeOnMiningServerAsync("S3cr3tT0k3n", 4);
System.Console.WriteLine($"Mining result: {result.MiningText}");
System.Console.WriteLine($"Elapsed seconds: {result.ElapsedSeconds:N}");
}
public async Task LaunchMiningMethodWithCancellationAsync()
{
/* The line new CancellationTokenSource(1000) puts a 1 second (1,000 millisecond) timeout on the Token that it creates.
* There are other methods for requesting cancellation from the CancellationTokenSource.
* You can use the cancellation methods from any thread that has access to the CancellationTokenSource
* – which is essentially the parent object of the cancellation token you pass to a TAP method */
var cts = new CancellationTokenSource(1000);
Task <MiningResultDto> asyncTask = RentTimeOnMiningServerAsync("S3cr3tT0k3n", 4, cts.Token);
try
{
MiningResultDto result = await asyncTask;
System.Console.WriteLine($"Mining result: {result.MiningText}");
System.Console.WriteLine($"Elapsed seconds: {result.ElapsedSeconds:N}");
System.Console.WriteLine("End");
}
catch (System.Exception ex)
{
System.Console.WriteLine(ex.Message);
System.Console.WriteLine($"Task status:{asyncTask.Status}");
}
/* This is a fairly straightforward example of cancellation. There are a multitude of other ways to set up
* methods that are cancelable and to request cancellation. These techniques can be used for both async and
* parallel code.
*
* Further information can be found here: https://docs.microsoft.com/en-us/dotnet/standard/threading/cancellation-in-managed-threads */
}
public MiningResultDto RentTimeOnLocalMiningServer(string authToken, int requestedIterations)
{
if (!AuthorizeTheToken(authToken))
{
throw new Exception("Failed Authorization");
}
var result = new MiningResultDto();
var startTime = DateTime.UtcNow;
var coinAmount = MineAsyncCoinsWithNthRoot(requestedIterations);
result.ElapsedSeconds = (DateTime.UtcNow - startTime).TotalSeconds;
result.MiningText = $"You've got {coinAmount:N} AsyncCoin!";
return(result);
}
public async Task <MiningResultDto> RentTimeOnMiningServerAsync(string authToken, int requestedAmount)
{
if (!AuthorizeTheToken(authToken))
{
throw new Exception("Failed Authorization");
}
var result = new MiningResultDto();
var startTime = DateTime.UtcNow;
var coinResult = await CallCoinServiceAsync(requestedAmount);
var elapsedSeconds = (DateTime.UtcNow - startTime).TotalSeconds;
result.ElapsedSeconds = elapsedSeconds;
result.MiningText = coinResult;
return(result);
}
public async Task LaunchMiningMethodWithCancellationAsync()
{
var cts = new CancellationTokenSource(1000);
Task <MiningResultDto> asyncTask = RentTimeOnMiningServerAsync("SecretToken", 4, cts.Token);
try
{
MiningResultDto result = await asyncTask;
Console.WriteLine($"mining result: {result.MiningText}");
Console.WriteLine($"Elapsed seconds: {result.ElapsedSeconds:N}");
Console.WriteLine("end");
}
catch (System.Exception ex)
{
Console.WriteLine(ex.Message);
Console.WriteLine($"Task status: {asyncTask.Status}");
}
}
public async Task <MiningResultDto> RentTimeOnMiningServerAsync(string authToken, int requestedAmount)
{
/* The class runs synchronous code for authorization and throws an error if authorization fails.
* TAP guidance: “An asynchronous method should only directly raise an exception to be thrown out of
* the MethodNameAsync call in response to a usage error. For all other errors, exceptions occurring
* during the execution of an asynchronous method should be assigned to the returned Task.” */
if (!AuthorizeTheToken(authToken))
{
throw new Exception("Failed Authorization");
}
var result = new MiningResultDto();
var startTime = DateTime.UtcNow;
var coinResult = await CallCoinServiceAsync(requestedAmount);
var elapsedSeconds = (DateTime.UtcNow - startTime).TotalSeconds;
result.ElapsedSeconds = elapsedSeconds;
result.MiningText = coinResult;
return(result);
}
public Task <MiningResultDto> RentTimeOnLocalMiningServerTask(string authToken, int requestedIterations)
{
/* Parallel compute-bound method that runs multiple Tasks
*
* In this method there is a big difference with how the Task is created. Notice that you start with TaskCompletionSource<MiningResultDto>.
* This object allows you more control of the content and behavior of a Task. By writing code then using the SetResult method, your method
* creates a Task<T> and give it back to the consumer.
*
* Consuming code can simply await the completion of the task, or can use Task.Run to launch it on a background thread. */
if (!AuthorizeTheToken(authToken))
{
throw new Exception("Failed Authorization");
}
var tcs = new TaskCompletionSource <MiningResultDto>();
var result = new MiningResultDto();
var starTime = DateTime.UtcNow;
var localMiningTaskList = new List <Task <MiningResultDto> >();
for (int i = 0; i < 3; i++)
{
Task <MiningResultDto> task = Task.Run(() => RentTimeOnLocalMiningServer("S3cr3tT0k3n", 5));
localMiningTaskList.Add(task);
}
var localMiningArray = localMiningTaskList.ToArray();
Task.WaitAll(localMiningArray);
foreach (var task in localMiningArray)
{
result.MiningText += task.Result.MiningText + Environment.NewLine;
}
result.ElapsedSeconds = (DateTime.UtcNow - starTime).TotalSeconds;
tcs.SetResult(result);
return(tcs.Task);
}
