TaskScheduler | threaded task scheduler designed for video games | Game Engine library
kandi X-RAY | TaskScheduler Summary
kandi X-RAY | TaskScheduler Summary
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QUESTION
I have a Spring boot application which receives messages from MQ and create a file and store all the data in that file.
I am trying to test this application but I encountered "MQRFH2 has an invalid value" error when I am using a mock bean for this class.
The code for the Main Application is :
...ANSWER
Answered 2021-Jun-03 at 19:07It looks like you have messed up the
QUESTION
Looking to run R script once a month at the first of every month.I've figured out how to run it via task scheduler with the taskscheduleR library. Here is the current cadence I have set on it:
...ANSWER
Answered 2021-Jun-03 at 14:34From the package documentation:
QUESTION
I have a project where I am using Spring Integration where I am connecting to a broker and then publish-subscribe the messages issued to the broker.
When using @EnableAutoConfiguration and @ComponentScan and @Configuration the application runs fine that is using @SpringBootApplication as a whole. But I don't want to use @EnableAutoConfiguration, this is just a POC project to be integrated into a bigger chunk project. Where, if @EnableAutoConfiguration is used may cause issues for other components which are not needed.
So, how can I resolve this issue?
This is just an excerpt from the project and when done should run normally:
...ANSWER
Answered 2021-May-16 at 19:14You are missing @EnableIntegration
. That one adds a broader Spring Integration infrastructure , included a required TaskScheduler
. See docs foer more info: https://docs.spring.io/spring-integration/docs/current/reference/html/overview.html#configuration-enable-integration
QUESTION
I'm reading a book on threads, below is the quote from the book:
When a thread calls the Wait method, the system checks if the Task that the thread is waiting for has started executing. If it has, then the thread calling Wait will block until the Task has completed running. But if the Task has not started executing yet, then the system may (depending on the TaskScheduler) execute the Task by using the thread that called Wait. If this happens, then the thread calling Wait does not block; it executes the Task and returns immediately
Let's say we have the following code:
...ANSWER
Answered 2021-May-14 at 04:41if [the unusual happens], there is still a chance (0.01%) that the main thread can execute Sum method, is my understanding correct?
The answer is possibly!
This involves some serious deep-diving into the specific implementation details of how the TaskScheduler
handles tasks that are queued and how the compiler and subsequent smoke and mirrors that run in the back-end of the MSDN language have implemented the state-machines that handle Tasks
and async
operations.
But in the basic sense you're conclusion, in my opinion, is correct! Per MSDN, if you are using the default TaskScheduler
, the TaskScheduler
implements certain optimizations on your behalf such as Task Inlining, like you described, and other optimizations like Work Stealing.
If work stealing and task inlining are not desirable, consider specifying a synchronization context of the tasks that you are creating, to prevent them from performing work on threads other than the ones you specify.
QUESTION
I keep my service interfaces as lean are possible, normally they are @FunctionalInterface. I try to follow there the interface segregation principle.
Is a good practice that my service implementation implements multiple interfaces if they share most of there dependencies? or should I create a separate implementation for each interface?
...ANSWER
Answered 2021-Apr-28 at 17:00If every interface you are creating has exactly one method then you are doing something wrong.
Suppose something wants to find the number of tasks in a period, and add a new task if the number is above or below some arbitrary threshold. With your design, it's impossible. You can either talk to a finder, or an executor, but not a FinderAndExecutor. In such case, you would just need to speak to TaskService
directly, completely undermining the point of the interfaces.
Suppose Java's Collection
interface were broken up into these interfaces:
QUESTION
async void Main()
{
T0.TT();
}
private class T0
{
[ThreadStatic] private static int test;
public static async void TT()
{
test = 4;
var continuation = new System.Threading.Tasks.TaskCompletionSource(System.Threading.Tasks.TaskContinuationOptions.RunContinuationsAsynchronously);
var th = new Thread(() => { Thread.Sleep(500); Console.WriteLine(test); test = 3; continuation.TrySetResult(5); test = 7; });
th.Start();
Console.WriteLine(await continuation.Task);
Console.WriteLine(test);
}
}
...ANSWER
Answered 2021-May-07 at 20:09You should be passing TaskCreationOptions.RunContinuationsAsynchronously
, not TaskContinuationOptions.RunContinuationsAsynchronously
.
Passing TaskContinuationOptions.RunContinuationsAsynchronously
will call the overload that takes an object
parameter, treating it as a "state" object and not as a flag controlling the TCS behavior.
QUESTION
I have problem with saveworkbook
and my result. I create an excel file with currency using createstyle(nmFmt='# ##0.00 zł')
and createstyle(nmFmt='# ##0.00 €')
etc. and then I use saveWorkbook(wb, xxx)
. In my result I see specific symbols lika a €, £ and zł when I run manually by Rstudio - everything is ok.
Then I create task by package taskscheduleR and my excel file has something like a ⬠or zÂ.
TaskscheduleR run program by cmd. SessionInfo give(): system code page: 65001
I have marked also "Beta: Use Unicode UTF-8 for worldwide language support" in Administrative Settings.
Could you solve this task?
...ANSWER
Answered 2021-Apr-22 at 14:56It's all about encoding, maybe some kind of mojibake:
QUESTION
So I have a program that I want to start minimised in the notification tray in Windows. I've got the program to do that if I manually launch it from the start menu but I'm having an issue where if I try to start it using Task Scheduler it will start not minimised.
...ANSWER
Answered 2021-Apr-17 at 18:41It's best to always use a full path for files as then you can be sure that it is looking where you want it to look.
You can use the filename returned by:
IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "yourProgramsDataDirectoryGoesHere", "enabled")
That and the other Windows "special folders" known to .NET are listed in Environment.SpecialFolder Enum.
Another thing to check for is that the account the task is running under has permission to access the file.
[Also, to create a file it's easier to use IO.File.WriteAllText(fullPathToTheFile, "")
as then you don't have to remember to call .Dispose()
on the FileStream.]
QUESTION
When a thread is created as a task on projects written in asp.net webform or .Net Core Web and is added to a server, it stops running after a while without a reason or exception.
...ANSWER
Answered 2021-Apr-13 at 11:29You shouldn't use tasks to launch fire-and-forget jobs, since there is nobody to cache exceptions from it. You also won't be able to use scoped services from there (like the DB), since it'll mess the scope management. To get the background-running process you can use HostedService
QUESTION
I am implementing a caching layer for my ASP.NET Core 3.1 Web API.
Starting Implementation ...ANSWER
Answered 2021-Apr-07 at 19:02The linked solution only works when using a named mutex to synchronize asynchronous code across processes. It won't work to synchronize code within the same process. Mutexes allow recursive acquisition, so by moving all acquisitions on the same thread, it's the same as if the mutex isn't there at all.
I'd have to keep all my semaphores in a Dictionary and that would be too cumbersome to manage.
If you need a non-recursive named mutex, named Semaphore
s (which don't work on Linux) or managing your own dictionary is really the only way to go.
I have an AsyncCache
that I've been working on but isn't prod-ready yet. It tries to look like a cache of Task
instances but is actually a cache of TaskCompletionSource
instances.
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