# workerpool
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Concurrency limiting goroutine pool. Limits the concurrency of task execution, not the number of tasks queued. Never blocks submitting tasks, no matter how many tasks are queued.

[![GoDoc](https://godoc.org/github.com/gammazero/workerpool?status.svg)](https://godoc.org/github.com/gammazero/workerpool)

This implementation builds on ideas from the following:

- http://marcio.io/2015/07/handling-1-million-requests-per-minute-with-golang
- http://nesv.github.io/golang/2014/02/25/worker-queues-in-go.html

## Installation
To install this package, you need to setup your Go workspace.  The simplest way to install the library is to run:
```
$ go get github.com/gammazero/workerpool
```

## Example
```go
package main

import (
	"fmt"
	"github.com/gammazero/workerpool"
)

func main() {
	wp := workerpool.New(2)
	requests := []string{"alpha", "beta", "gamma", "delta", "epsilon"}

	for _, r := range requests {
		r := r
		wp.Submit(func() {
			fmt.Println("Handling request:", r)
		})
	}

	wp.StopWait()
}
```