heboq/concurrency-homework

Concurrency practice

Concurrent batch

Implement a function that will load users from the database
getBatch(n int64, pool int64) res []user

The function takes two arguments - the number of users and the number of goroutines in which users will concurrently load​

for i := 0; i < number; i++ {
      go func() {
         user := getOne()...
      }
}

The function returns an array of received users
It is planned to review the solution for the interview

NOTE

Due to autocode VM limitations, run tests locally. It is possible that autocode tests will pass with an invalid solution​

Tips & tricks

• Don't forget the data race
• To limit concurrently running goroutines you can use:
  • Semaphore pattern
  • Worker pool
  • errgroup
  • etc ...