Golang 批量执行/并发执行

提到Golang，都说Golang 天生高并发。所以分享一下我认为的Golang高并发精髓

简单的并发执行util

package util
import (
	"context"
	"sync"
)

type batchRunner struct {
	BatchSize int
	ctx       context.Context
	channel   chan func()
	wg        sync.WaitGroup
}

func NewBatchRunner(ctx context.Context, batch int) *batchRunner {
	r := &batchRunner{
		BatchSize: batch,
		channel:   make(chan func()),
		ctx:       ctx,
	}
	for batchIdx := 0; batchIdx < r.BatchSize; batchIdx++ {
		r.wg.Add(1)
		go func() {
			for r.ctx.Err() == nil {
				f, open := <-r.channel
				if !open && f == nil {
					break
				}
				f()
			}
			r.wg.Done()
		}()
	}
	return r
}

func (r *batchRunner) Run(handel func()) {
	r.channel <- handel
}

func (r *batchRunner) Wait() {
	close(r.channel)
	r.wg.Wait()
}