feat(action): added Action support

CHANGELOG.md

@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [1.0.4] - 2024-03-18
+- added `Action` support
 
 ## [1.0.3] - 2024-03-12
 - added `WaitN` (#1)

README.md

@@ -1,5 +1,5 @@
 # Async
-Async is an asynchronous task package for Go.
+Async is an async/await like task package for Go
 
 ![License](https://img.shields.io/badge/license-MIT-green.svg)
 [![Tests](https://github.com/yaitoo/async/actions/workflows/tests.yml/badge.svg)](https://github.com/yaitoo/async/actions/workflows/tests.yml)
@@ -10,12 +10,12 @@ Async is an asynchronous task package for Go.
 
 
 ## Features
-- Wait/WaitAny/WaitN
+- Wait/WaitAny/WaitN for `Task` and `Action`
 - `context.Context` with `timeout`, `cancel`  support
 - Works with generic instead of `interface{}`
 
 ## Tutorials
-see more examples on [tests](./awaiter_test.go) or [go.dev](https://go.dev/play/p/7jgcRltbwts)
+see more examples on [tasks](./waiter_test.go), [actions](./awaiter_test.go) or [go.dev](https://go.dev/play/p/7jgcRltbwts)
 
 ### Install async
 - install latest commit from `main` branch

async.go

@@ -6,11 +6,25 @@ import (
 )
 
 var (
-	ErrTooLessDone = errors.New("async: too less tasks to completed without error")
+	ErrTooLessDone = errors.New("async: too less tasks/actions to completed without error")
 )
 
-func New[T any](tasks ...func(ctx context.Context) (T, error)) Awaiter[T] {
-	return &awaiter[T]{
+// Task a task with result T
+type Task[T any] func(ctx context.Context) (T, error)
+
+// New create a task waiter
+func New[T any](tasks ...Task[T]) Waiter[T] {
+	return &waiter[T]{
 		tasks: tasks,
 	}
 }
+
+// Action a task without result
+type Action func(ctx context.Context) error
+
+// NewA create an action awaiter
+func NewA(actions ...Action) Awaiter {
+	return &awaiter{
+		actions: actions,
+	}
+}

awaiter.go

@@ -4,112 +4,94 @@ import (
 	"context"
 )
 
-type Awaiter[T any] interface {
-	// Add add a task
-	Add(task func(context.Context) (T, error))
-	// Wait wail for all tasks to completed
-	Wait(context.Context) ([]T, []error, error)
-	// WaitAny wait for any task to completed without error, can cancel other tasks
-	WaitAny(context.Context) (T, []error, error)
-	// WaitN wait for N tasks to completed without error
-	WaitN(context.Context, int) ([]T, []error, error)
+type Awaiter interface {
+	// Add add an action
+	Add(action Action)
+	// Wait wail for all actions to completed
+	Wait(context.Context) ([]error, error)
+	// WaitAny wait for any action to completed without error, can cancel other tasks
+	WaitAny(context.Context) ([]error, error)
+	// WaitN wait for N actions to completed without error
+	WaitN(context.Context, int) ([]error, error)
 }
 
-type awaiter[T any] struct {
-	tasks []func(context.Context) (T, error)
+type awaiter struct {
+	actions []Action
 }
 
-func (a *awaiter[T]) Add(task func(ctx context.Context) (T, error)) {
-	a.tasks = append(a.tasks, task)
+func (a *awaiter) Add(action Action) {
+	a.actions = append(a.actions, action)
 }
 
-func (a *awaiter[T]) Wait(ctx context.Context) ([]T, []error, error) {
-	wait := make(chan Result[T])
+func (a *awaiter) Wait(ctx context.Context) ([]error, error) {
+	wait := make(chan error)
 
-	for _, task := range a.tasks {
-		go func(task func(context.Context) (T, error)) {
-			r, err := task(ctx)
-			wait <- Result[T]{
-				Data:  r,
-				Error: err,
-			}
-		}(task)
+	for _, action := range a.actions {
+		go func(action Action) {
+
+			wait <- action(ctx)
+		}(action)
 	}
 
-	var r Result[T]
 	var taskErrs []error
-	var items []T
 
-	tt := len(a.tasks)
+	tt := len(a.actions)
 	for i := 0; i < tt; i++ {
 		select {
-		case r = <-wait:
-			if r.Error != nil {
-				taskErrs = append(taskErrs, r.Error)
-			} else {
-				items = append(items, r.Data)
+		case err := <-wait:
+			if err != nil {
+				taskErrs = append(taskErrs, err)
 			}
 		case <-ctx.Done():
-			return items, taskErrs, ctx.Err()
+			return taskErrs, ctx.Err()
 		}
 	}
 
-	if len(items) == tt {
-		return items, taskErrs, nil
+	if len(taskErrs) > 0 {
+		return taskErrs, ErrTooLessDone
 	}
 
-	return items, taskErrs, ErrTooLessDone
+	return taskErrs, nil
 }
 
-func (a *awaiter[T]) WaitN(ctx context.Context, n int) ([]T, []error, error) {
-	wait := make(chan Result[T])
+func (a *awaiter) WaitN(ctx context.Context, n int) ([]error, error) {
+	wait := make(chan error)
 
 	cancelCtx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
-	for _, task := range a.tasks {
-		go func(task func(context.Context) (T, error)) {
-			r, err := task(cancelCtx)
-			wait <- Result[T]{
-				Data:  r,
-				Error: err,
-			}
-		}(task)
+	for _, action := range a.actions {
+		go func(action Action) {
+			wait <- action(cancelCtx)
+
+		}(action)
 	}
 
-	var r Result[T]
 	var taskErrs []error
-	var items []T
-	tt := len(a.tasks)
+	tt := len(a.actions)
+
 	var done int
 	for i := 0; i < tt; i++ {
 		select {
-		case r = <-wait:
-			if r.Error != nil {
-				taskErrs = append(taskErrs, r.Error)
+		case err := <-wait:
+			if err != nil {
+				taskErrs = append(taskErrs, err)
 			} else {
-				items = append(items, r.Data)
+
 				done++
 				if done == n {
-					return items, taskErrs, nil
+					return taskErrs, nil
 				}
 			}
 		case <-ctx.Done():
-			return items, taskErrs, ctx.Err()
+			return taskErrs, ctx.Err()
 		}
 
 	}
 
-	return items, taskErrs, ErrTooLessDone
+	return taskErrs, ErrTooLessDone
 }
 
-func (a *awaiter[T]) WaitAny(ctx context.Context) (T, []error, error) {
-	var t T
-	result, err, taskErrs := a.WaitN(ctx, 1)
-
-	if len(result) == 1 {
-		t = result[0]
-	}
-
-	return t, err, taskErrs
+func (a *awaiter) WaitAny(ctx context.Context) ([]error, error) {
+	return a.WaitN(ctx, 1)
 }