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How to create a pool of threads


How to create a pool of threads

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How to create a pool of threads
Tag : python , By : user109127
Date : January 11 2021, 05:14 PM

seems to work fine yield1 is a generator function. To get it to yield a value you have to call next on it. Change it so it returns a value
def yield1(self, url):
    print("inside function")
    return scrapy.Request(url, callback=self.parse_product)
class TempSpider(scrapy.Spider):
    name = 'foo'
    start_urls = [
        'https://www.jny.com/collections/jackets',
    ]
    def parse(self, response):
        self.product_url =  response.xpath('//div[@class = "collection-grid js-filter-grid"]//a/@href').getall()
        for pu in self.product_url:
            print("inside the loop")
            response.urljoin(pu)
            yield response.follow(response.urljoin(pu), self.parse_product)

    def parse_product(self, response):
        '''parses the product urls'''

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Can I make my Thread pool create its threads as foreground?


Tag : chash , By : Daniel Reslie
Date : March 29 2020, 07:55 AM
To fix this issue The notion of a "background thread" means very little in .NET. The Thread.IsBackground property is just a simple flag that helps the CLR decide whether or not it should rudely abort the thread when the AppDomain gets unloaded or whether it should wait for the thread to exit voluntarily.
You can just change the property if you want a thread-pool thread to keep running at program exit. This snippet shows how that's possible:
using System;
using System.Threading;

class Program {
    static void Main(string[] args) {
        var sync = new ManualResetEvent(false);
        ThreadPool.QueueUserWorkItem((_) => {
            Console.WriteLine("Running");
            Thread.CurrentThread.IsBackground = false;
            sync.Set();
            Thread.Sleep(5000);
            Console.WriteLine("Done, should exit now");
            Thread.Sleep(250);
        });
        sync.WaitOne();  // Ensures IsBackground is set
    }
}

Spring WebFlux create pool of no-blocking threads


Tag : spring , By : silvervino
Date : March 29 2020, 07:55 AM
this will help If you're using non-blocking APIs, you don't need to schedule tasks on specific threads - Reactor is doing that for you. With Spring WebFlux, the threads used for processing work are managed by Reactor or it is reusing the Netty threads.
Check out the Schedulers and threading parts of the reactor reference documentation.

Why does a cached thread pool create two threads, and why does shutting it down change that?


Tag : java , By : user161314
Date : March 29 2020, 07:55 AM
With these it helps Your runnable crashes its thread. So the pool will replace that thread with a new one (for the next task you might submit).
If the pool is already being shut down, it will not do that.

How to create threads in ASP.NET pages from CLR thread pool instead of ASP.NET pool?


Tag : chash , By : Debashree
Date : March 29 2020, 07:55 AM

Thread pool to create set number of threads per second


Tag : java , By : user171752
Date : March 29 2020, 07:55 AM
I wish this help you
call a method 10 times per second on separate threads using a thread pool
class MyClass{
 static void myMethod(){
   // some task
 }
}
Runnable runnable = () ->{
  for(int i=0; i<10; i++){
   try{
     Thread.sleep(1000);
     MyClass.myMethod();
   }catch{}
  }
};
int threadCount = 10; //whatever number of threads you wish
ExecutorService executor = Executors.newFixedThreadPool(threadCount);
executor.execute(runnable);
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