How to signal select() to return immediately?

I have a worker thread that is listening to a TCP socket for incoming traffic, and buffering the received data for the main thread to access (let's call this socket A). However, the worker thread...

WCF Polling Duplex Binding and Non-Silverlight Clients

I'm having a heck of a time figuring this out. I have a WCF service that I need to puch information to Silverlight client, but I need a console application to also be able to participate in this....

How Many Items Should I have in an RSS feed?

All the information I could find regarding generating RSS feeds gives examples where an indeterminate number of items is returned. That doesn't seem too practical, especially if I have a ton of...

Constantly print Subprocess output while process is running

To launch programs from my Python-scripts, I'm using the following method: def execute(command): process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE,...

Python, Postgres and Ajax/ Jquery update page realtime with databse values

I'm familiar with PHP and MySQL, however I need to find a way to update a web page each time a value changes in my database asynchronously, with a Python backend, a Postgres database, and maybe...

Asynchronous Pages equivalent in Java for REST Services

We are writing some REST services using Jersey. Our service make some underlying service calls which happens to be dead slow, which results in holding each thread per request for 3-4 seconds....

Unable to use getChildFragmentManager() in a fragment that was added to ViewPager

I have an app that is using ActionbarSherlock, SlidingMenu, and also ViewPager. This app works well but I am trying to introduce using Nested Fragment into the ViewPager. Currently I have one...

Long polling issue

I have strange issue, I'm doing long polling to check if something new appeared in MySQL table, everything works fine, I'm getting messages as soon as they appear in table. but problem is when I'm...

Force close onclick intent

I have tried searching and to troubleshoot for hours, but I still could not figure out why will my app force close. When I click on the text, it switches and displays figure603.xml perfectly, but...

how to reduce quartz scheduling latency

Im using Quartz under Spring backed by a jdbc job store, and im trying to make it trigger a job "now": Trigger adHocTrigger =...

How to debug 'Invalid frame header' Websocket issues with Rails/websocket-rails (standalone)

I'm getting started with websocket-rails, trying to convert an old polling system for notifications (on Ruby 2.1/Rails 4.0) to something a bit more modern with WS. I'm using WebsocketRails in...

Cancel a vanilla ECMAScript 6 Promise chain

Is there a method for clearing the .thens of a JavaScript Promise instance? I've written a JavaScript test framework on top of QUnit. The framework runs tests synchronously by running each one in...

Camel - Stop route when the consuming directory not exists

I've an SFTP route (in Spring XML), and its from path ends in a daily changing directory (ie. /yyyyMMdd), and everything is working well when autoCreate=true or the directory exists when the route...

SocketCAN select() and write() don't block

I'm testing the CAN interface on an embedded device (SOC / ARM core / Linux) using SocketCAN, and I want to send data as fast as possible for testing, using efficient code. I can open the CAN...

Is there a way for an Windows service to communicate with an Electron App?

I have a Windows Service polling periodically whether my app in running or not. When it is, the service checks for an update on a server. If there is an update, I need a way for the service to let...

Hold thread in spring rest request for long-polling

As I wrote in title we need in project notify or execute method of some thread by another. This implementation is part of long polling. In following text describe and show my implementation. So...

Is SQS short polling ever preferable to long polling?

Amazon SQS supports two modes of polling for available messages: short polling and long polling. With long polling, the consumer specifies a timeout of 1-20 seconds to wait for available...

REST API with active push notifications from server to client

Problem description i am working on a Xamarin application that consumes a REST API written in Python flask. The Xamarin application offers virtual shopping lists where user can collaborate on...

Jenkins pipeline menu does not show the "Configure", "Build Now", and some other options

I have a Jenkins pipeline that I have setup with a project I have on GitHub. Initially, I manually initiated a build each time I changed my code by clicking the "Build Now" option. However, I did...

Use redux connect function passing props.children as React element

I need a component that starts polling for data from an API as soon as it gets mounted and it stops when unmounted. The data must be available for a child component. This is my current...

How to check when ffmpeg completes a video segment?

I'm using a ffmpeg Process from within my C# program. I start it off and run it in segmented mode. ffmpeg -i rtsp://127.0.0.1/axis-media/media.amp?resolution=1280x720 -c copy -map 0 -f segment...

AWS SQS: how do we consume message

I want to convert one of my synchronous API into asynchronous. And I believe queue are one way to do this. Like a publisher will push(synchronously) the message into queue which will be consumed...

Docker and Webpack hot reload not working

Here I would like to use Docker for my future react/webpack app, but I can't configure Webpack and/or docker correctly for the reload to work (webpack-dev-server ). I don't really understand why,...

Django 3.1: StreamingHttpResponse with an async generator

Documentation for Django 3.1 says this about async views: The main benefits are the ability to service hundreds of connections without using Python threads. This allows you to use slow streaming,...

Trigger Jenkins build when pull request is merged in Github

This should be an easy, out-of-the-box configuration in Jenkins but I haven't found anything straightforward on the internet. All I want to do is a trigger a build ONLY when a pull request i...

How to fix 400 error bad request in socket io?

I have a frontend application(VUE JS) I have a backend (Nest JS) Vue JS app get data from backend via websockets using vue-socket.io-extended library When Vue JS app starts I see errors in...

Strava Webhook API is not sending all events

I created an app on Strava. Authorized my app on my account with read,activity:read,activity:read_all,read_all permissions. I didn't want polling their API for activities as they recommend...

Setting stockfish skill level (UCI / Javascript)

I can't for the life of me seem to be able to set stockfish to do anything except deliver crushing blows at level 20. Provided below is the code set up to configure the Skill Level and Depth for...

gunicorn + django + telegram + mqtt client

We use gunicorn with django and django-telegrambot. We also have a MQTT client in an own app. When some MQTT messages arrive we send Telegram messages and the other way around. The Problem is now...

getifaddrs returning 'bad file descriptor'/crashing the application

In my program, I have a thread which has to continuously monitor the network interfaces therefore it continuosly uses getifaddrs() in a while loop. while(true) { struct ifaddrs...