multithreading

问题 In my program i'm creating socket and whes client connects i'm creating new thread and trying to read and write from/to connected to this socket, but alway get an Read Error because host-computer closed connection for the second command, first command from client worfs fine, and third works fine. i try to check if clientSocket is connected and if networkStream is readable and they alway returns true. how can i solve this? and how can it be - networkStream.CanRead returns true but

问题 I want to create a custom thread pool for having more control over the code for future needs. So far I haven't been able to write something functional. I want the threads to work separately from the main interpreter process. I don't need multi-core advantage. Threads(Worker) should listen for a change in queue size and run execute on the passed job. I cannot make this code work. Does anybody see any solution to make this work? import queue from threading import Thread import time import

问题 useI am working on a python script to check if the url is working. The script will write the url and response code to a log file. To speed up the check, I am using threading and queue. The script works well if the number of url's to check is small but when increasing the number of url's to hundreds, some url's just will miss from the log file. Is there anything I need to fix? My script is #!/usr/bin/env python import Queue import threading import urllib2,urllib,sys,cx_Oracle,os import time

问题 I'm using Sidekiq to perform some heavy processing in the background. I looked online but couldn't find the answers to the following questions. I am using: Class.delay.use_method(listing_id) And then, inside the class, I have a self.use_method(listing_id) listing = Listing.find_by_id listing_id UserMailer.send_mail(listing) Class.call_example_function() Two questions: How do I make this function idempotent for the UserMailer sendmail? In other words, in case the delayed method runs twice, how

问题 I have a few labels bound to a few variables that are modified in other threads via GCD. Now I've read that cocoa bindings are not thread safe but my app is running fine (the UI updates when the values of the variables are updated in a background thread) Would it be the correct way to do the calculations in the background thread and if I need to change the variable value make this via DispatchQueue.main.sync() { self.variable = newValue } ? If cocoa bindings are not thread safe, why I never

问题 I'm trying to develop a kivy app for my less-comp-savvy colleagues which wraps a nice GUI around some computations which I developed for a project; currently I have two methods embedded in a class, one (called 'dummy') which keeps the GUI from freezing and from such multithreads the second method (called 'calculate') which actually runs the computation. Within the dummy method I'm hoping to open a popup which displays a 'loading GIF' (indicating that the program is running and not just frozen

问题 I am using Thread for some Async operations. Now primarily I have 3 Threads like : private lateinit var horse1Thread: Thread private lateinit var horse2Thread: Thread private lateinit var timerThread: Thread Calling stop() in onDestroy() of activity causes a UnsupportedOperationException and I thought of setting these values to null to allow GC collection and prevent memory leak. Since my fields are non-null types I cant set them to null . So is this my only option? Or does kotlin provide a

问题 I am building an app where requests come in on a zeromq socket. For each request I want to do some processing and send a response, however if a predefined time elapses I want to send the response immediately. In node.js, I would do something like: async function onRequest(req, sendResponse) { let done = false; setTimeout(() => { if (!done) { done = true; sendResponse('TIMED_OUT'); } }, 10000); await doSomeWork(req); // do some async work if (!done) { done = true; sendResponse('Work done'); }

问题 For example see this answer: Python - How can I implement a 'stoppable' thread? for stoppable threads using the standard threading module. Is there an equivalent pattern using the concurrent.futures package? 来源： https://stackoverflow.com/questions/64234803/is-there-a-stoppable-thread-in-pythons-concurrent-futures

问题 This question already has answers here : How to tell a lambda function to capture a copy instead of a reference in C#? (4 answers) Closed 1 year ago . I have created a console app which print the number in a for loop using C# Task.Run() method. If you look at the code, I am initializing the Employee object in the loop and pass the number in the method, though it prints the same number. Code: class Program { static void Main(string[] args) { for (int i = 1; i <= 500; i++) { Task.Run(() => new