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README.md

golang worker pool

Mentioned in Awesome Go

中文说明

  • 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.

  • Support through security queues queue

  • golang workpool common library

Installation

The simplest way to install the library is to run:

$ go get github.com/xxjwxc/gowp

Support the maximum number of tasks, put them in the workpool and wait for them to be completed

Example

package main

import (
	"fmt"
	"time"

	"github.com/xxjwxc/gowp/workpool"
)

func main() {
	wp := workpool.New(10)     // Set the maximum number of threads
	for i := 0; i < 20; i++ { // Open 20 requests 
		ii := i
		wp.Do(func() error {
			for j := 0; j < 10; j++ { // 0-10 values per print
				fmt.Println(fmt.Sprintf("%v->\t%v", ii, j))
				time.Sleep(1 * time.Second)
			}
			//time.Sleep(1 * time.Second)
			return nil
		})
	}

	wp.Wait()
	fmt.Println("down")
}

Support for error return

package main

import (
	"fmt"
	"time"

	"github.com/xxjwxc/gowp/workpool"
)

func main() {
	wp := workpool.New(10)             // Set the maximum number of threads
	for i := 0; i < 20; i++ { 
		ii := i
		wp.Do(func() error {
			for j := 0; j < 10; j++ { // 0-10 values per print
				fmt.Println(fmt.Sprintf("%v->\t%v", ii, j))
				if ii == 1 {
					return errors.Cause(errors.New("my test err")) // have err return
				}
				time.Sleep(1 * time.Second)
			}

			return nil
		})
	}

	err := wp.Wait()
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println("down")
	}

Supporting judgement of completion (non-blocking)

package main

import (
	"fmt"
	"time"

	"github.com/xxjwxc/gowp/workpool"
)

func main() {
	wp := workpool.New(5)              // Set the maximum number of threads
	for i := 0; i < 10; i++ { 
		//	ii := i
		wp.Do(func() error {
			for j := 0; j < 5; j++ { 
				//fmt.Println(fmt.Sprintf("%v->\t%v", ii, j))
				time.Sleep(1 * time.Second)
			}
			return nil
		})

		fmt.Println(wp.IsDone())
	}
	wp.Wait()
	fmt.Println(wp.IsDone())
	fmt.Println("down")
}

Support synchronous waiting for results

package main

import (
	"fmt"
	"time"

	"github.com/xxjwxc/gowp/workpool"
)

func main() {
	wp := workpool.New(5) //Set the maximum number of threads
	for i := 0; i < 10; i++ { 
		ii := i
		wp.DoWait(func() error {
			for j := 0; j < 5; j++ { 
				fmt.Println(fmt.Sprintf("%v->\t%v", ii, j))
				// if ii == 1 {
				// 	return errors.New("my test err")
				// }
				time.Sleep(1 * time.Second)
			}

			return nil
			//time.Sleep(1 * time.Second)
			//return errors.New("my test err")
		})
	}

	err := wp.Wait()
	if err != nil {
		fmt.Println(err)
	}
	fmt.Println("down")
}
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