go: Futures & Promises Pattern
项目结构：
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:47
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : logger.go
*/
package utils
import (
"log"
"os"
"time"
)
type Logger struct {
inner *log.Logger
}
func NewLogger(name string) *Logger {
l := &Logger{
inner: log.New(os.Stdout, "", 0),
}
return l
}
func (l *Logger) Info(msg string) {
now := time.Now().Format("2006-01-02 15:04:05")
l.inner.Printf("[%s] INFO %s\n", now, msg)
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:47
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : order_state.go
*/
package core
// 订单状态枚举
type OrderState string
const (
StateCreated OrderState = "已创建"
StatePurchasing OrderState = "采购中"
StatePurchased OrderState = "采购完成"
StateDesigning OrderState = "设计中"
StateDesigned OrderState = "设计完成"
StateManufacturing OrderState = "加工中"
StateManufactured OrderState = "加工完成"
StateQualityCheck OrderState = "质检中"
StateQualified OrderState = "质检通过"
StateStoring OrderState = "入库中"
StateCompleted OrderState = "全部完成"
StateFailed OrderState = "执行失败"
)
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:48
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : base_task.go
*/
package core
// 任务抽象接口 Promise 契约
// ITask 所有工序任务统一接口（对应Python ITask Promise）
type ITask interface {
Execute(args ...interface{}) (interface{}, error)
GetName() string
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:50
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : purchase_task.go
*/
package tasks
import (
"godesginpattern/futurespromises/core"
"godesginpattern/futurespromises/utils"
"time"
)
// 采购任务
type PurchaseTask struct {
logger *utils.Logger
}
func NewPurchaseTask() core.ITask {
return &PurchaseTask{
logger: utils.NewLogger("PurchaseTask"),
}
}
func (p *PurchaseTask) Execute(args ...interface{}) (interface{}, error) {
p.logger.Info("开始采购 1克拉 GIA 裸石...")
time.Sleep(2 * time.Second)
res := "1克拉GIA裸石"
p.logger.Info("采购完成：" + res)
return res, nil
}
func (p *PurchaseTask) GetName() string {
return "采购任务"
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:50
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : design_task.go
*/
package tasks
import (
"fmt"
"godesginpattern/futurespromises/core"
"godesginpattern/futurespromises/utils"
"time"
)
// 设计任务
type DesignTask struct {
logger *utils.Logger
}
func NewDesignTask() core.ITask {
return &DesignTask{
logger: utils.NewLogger("DesignTask"),
}
}
func (d *DesignTask) Execute(args ...interface{}) (interface{}, error) {
stone := args[0].(string)
d.logger.Info(fmt.Sprintf("根据裸石【%s】开始3D设计...", stone))
time.Sleep(1 * time.Second)
res := "钻戒3D设计图纸"
d.logger.Info("设计完成：" + res)
return res, nil
}
func (d *DesignTask) GetName() string {
return "设计任务"
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:51
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : manufacture_task.go
*/
package tasks
import (
"fmt"
"godesginpattern/futurespromises/core"
"godesginpattern/futurespromises/utils"
"time"
)
// 加工任务
type ManufactureTask struct {
logger *utils.Logger
}
func NewManufactureTask() core.ITask {
return &ManufactureTask{
logger: utils.NewLogger("ManufactureTask"),
}
}
func (m *ManufactureTask) Execute(args ...interface{}) (interface{}, error) {
stone := args[0].(string)
design := args[1].(string)
m.logger.Info(fmt.Sprintf("加工：%s + %s", stone, design))
time.Sleep(3 * time.Second)
res := "1克拉定制钻戒成品"
m.logger.Info("加工完成：" + res)
return res, nil
}
func (m *ManufactureTask) GetName() string {
return "加工任务"
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:52
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : quality_task.go
*/
package tasks
import (
"fmt"
"godesginpattern/futurespromises/core"
"godesginpattern/futurespromises/utils"
"time"
)
// 质检任务
type QualityCheckTask struct {
logger *utils.Logger
}
func NewQualityCheckTask() core.ITask {
return &QualityCheckTask{
logger: utils.NewLogger("QualityTask"),
}
}
func (q *QualityCheckTask) Execute(args ...interface{}) (interface{}, error) {
product := args[0].(string)
q.logger.Info(fmt.Sprintf("质检：%s", product))
time.Sleep(1 * time.Second)
q.logger.Info("质检通过")
return product, nil
}
func (q *QualityCheckTask) GetName() string {
return "质检任务"
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:52
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : storage_task.go
*/
package tasks
import (
"fmt"
"godesginpattern/futurespromises/core"
"godesginpattern/futurespromises/utils"
"time"
)
// 入库任务
type StorageTask struct {
logger *utils.Logger
}
func NewStorageTask() core.ITask {
return &StorageTask{
logger: utils.NewLogger("StorageTask"),
}
}
func (s *StorageTask) Execute(args ...interface{}) (interface{}, error) {
product := args[0].(string)
s.logger.Info(fmt.Sprintf("入库：%s", product))
time.Sleep(1 * time.Second)
res := fmt.Sprintf("可销售：%s", product)
s.logger.Info("入库完成：" + res)
return res, nil
}
func (s *StorageTask) GetName() string {
return "入库任务"
}
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:53
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : process_service.go
*/
package service
import (
"fmt"
"godesginpattern/futurespromises/core"
"godesginpattern/futurespromises/utils"
)
// 流程调度服务（核心 Future/Promise 链式执行）
type JewelryProcessService struct {
logger *utils.Logger
state core.OrderState
}
func NewJewelryProcessService() *JewelryProcessService {
svc := &JewelryProcessService{
logger: utils.NewLogger("ProcessService"),
state: core.StateCreated,
}
svc.logger.Info(fmt.Sprintf("订单已创建 | 状态：%s", svc.state))
return svc
}
func (s *JewelryProcessService) updateState(newState core.OrderState) {
s.state = newState
s.logger.Info(fmt.Sprintf("状态更新 → %s", newState))
}
// StartFullProcess 链式异步执行所有工序，模拟Future占位符流程
func (s *JewelryProcessService) StartFullProcess(
purchase, design, manufacture, quality, storage core.ITask,
) (string, error) {
// 1.采购
s.updateState(core.StatePurchasing)
stone, _ := purchase.Execute()
s.updateState(core.StatePurchased)
// 2.设计
s.updateState(core.StateDesigning)
designDoc, _ := design.Execute(stone)
s.updateState(core.StateDesigned)
// 3.加工
s.updateState(core.StateManufacturing)
product, _ := manufacture.Execute(stone, designDoc)
s.updateState(core.StateManufactured)
// 4.质检
s.updateState(core.StateQualityCheck)
qualified, _ := quality.Execute(product)
s.updateState(core.StateQualified)
// 5.入库
s.updateState(core.StateStoring)
finalRaw, _ := storage.Execute(qualified)
s.updateState(core.StateCompleted)
return finalRaw.(string), nil
}
调用：
/*
# 版权所有 2026 ©涂聚文有限公司™ ®
# 许可信息查看：言語成了邀功盡責的功臣，還需要行爲每日來值班嗎
# 描述：Futures & Promises Pattern 链式契约模式
# Author : geovindu,Geovin Du 涂聚文.
# IDE : goLang 2024.3.6 go 26.2
# os : windows 10
# database : mysql 9.0 sql server 2019, postgreSQL 17.0 Oracle 21c Neo4j
# Datetime : 2026/6/23 20:54
# User : geovindu
# Product : GoLand
# Project : godesginpattern
# File : futurespromisesbll.go
*/
package bll
import (
"fmt"
"godesginpattern/futurespromises/service"
"godesginpattern/futurespromises/tasks"
"time"
)
func demo() {
// 实例化所有Promise任务
purchase := tasks.NewPurchaseTask()
design := tasks.NewDesignTask()
manufacture := tasks.NewManufactureTask()
quality := tasks.NewQualityCheckTask()
storage := tasks.NewStorageTask()
// 流程调度服务
process := service.NewJewelryProcessService()
// 启动全流程链式Future执行
finalResult, err := process.StartFullProcess(purchase, design, manufacture, quality, storage)
if err != nil {
fmt.Println("流程执行失败:", err)
return
}
// 等待5秒，保证最后日志完整输出，避免穿插输入框
fmt.Println("\n⏳ 等待5秒，收集完整流程日志...")
time.Sleep(5 * time.Second)
fmt.Println("\n" + "============================================================")
fmt.Printf("✅ 订单最终交付：%s\n", finalResult)
fmt.Println("============================================================")
}
func FuturesPromisesMain() {
demo()
}
输出：
哲学管理(学)人生, 文学艺术生活, 自动(计算机学)物理(学)工作, 生物(学)化学逆境, 历史(学)测绘(学)时间, 经济(学)数学金钱(理财), 心理(学)医学情绪, 诗词美容情感, 美学建筑(学)家园, 解构建构(分析)整合学习, 智商情商(IQ、EQ)运筹(学)生存.---Geovin Du(涂聚文）
浙公网安备 33010602011771号