group

package
Version: v0.7.5 Latest Latest
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Published: Mar 30, 2021 License: MIT Imports: 1 Imported by: 0

README

group

项目简介

懒加载对象容器

编译环境

  • 推荐 Golang v1.12.1 以上版本编译执行

依赖包

Documentation

Overview

Package group provides a sample lazy load container. The group only creating a new object not until the object is needed by user. And it will cache all the objects to reduce the creation of object.

Index

Examples

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Group

type Group struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

Group is a lazy load container.

func NewGroup

func NewGroup(new func() interface{}) *Group

NewGroup news a group container.

func (*Group) Clear

func (g *Group) Clear()

Clear deletes all objects.

func (*Group) Get

func (g *Group) Get(key string) interface{}

Get gets the object by the given key.

Example
new := func() interface{} {
	fmt.Println("Only Once")
	return &Counter{}
}
group := NewGroup(new)

// Create a new Counter
group.Get("pass").(*Counter).Incr()

// Get the created Counter again.
group.Get("pass").(*Counter).Incr()
Output:

Only Once

func (*Group) Reset

func (g *Group) Reset(new func() interface{})

Reset resets the new function and deletes all existing objects.

Example
new := func() interface{} {
	return &Counter{}
}
group := NewGroup(new)

newV2 := func() interface{} {
	fmt.Println("New V2")
	return &Counter{}
}
// Reset the new function and clear all created objects.
group.Reset(newV2)

// Create a new Counter
group.Get("pass").(*Counter).Incr()
Output:

New V2

Source Files

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