How to terminate goroutines in golang?​

Method 1: Using Channels to Signal Termination​

package main

import (
    "fmt"
    "time"
)

func performTask(terminateChan <-chan bool) {
    for {
        select {
        case <-terminateChan:
            fmt.Println("Task terminated by channel")
            return
        default:
            fmt.Println("Task is running")
            time.Sleep(time.Second)
        }
    }
}

func main() {
    terminateChan := make(chan bool)

    go performTask(terminateChan)

    time.Sleep(5 * time.Second)
    terminateChan <- true
    time.Sleep(time.Second)
    fmt.Println("Main Goroutine exited")
}

What is worker pool pattern?​

The Worker Pool pattern is a concurrency pattern in Go that allows you to manage and control the number of goroutines working on a set of tasks. This pattern is particularly useful when you have a large number of tasks to process and want to limit the number of concurrent goroutines to prevent excessive resource usage.

Sometimes, We need to have a task that can be executed at regular basic at some time. In ruby, we have a rake task to define and execute this task at any time. We can use rake tasks in Rails for various purposes.

Have you ever faced the following issue while fetching records from Postgres in the rails?

ActiveRecord::StatementInvalid: PG::InsufficientPrivilege: ERROR: permission denied for relation

First, we will understand how the const_get method works then I will explain how we can use it in different ways and what are the use cases.