go知识重新整理

Go/DesignPattern/chain/chain.go

@@ -0,0 +1,119 @@
+/**
+* @Author:zhoutao
+* @Date:2020/12/12 下午3:46
+* @Desc:
+ */
+
+package chain
+
+import "fmt"
+
+//责任链模式：用于分离不同职责，并且动态组合相关职责
+//golang因为没有继承的支持，在实现责任链的时候，使用链对象 涵盖 职责的方式，
+//即：
+//1、链对象包含当前职责对象以及下一个职责链
+//2、职责对象提供接口表示 是否能处理对应请求
+//3、职责对象提供处理函数的相关职责
+// 同时在职责链类中实现职责接口相关函数，使职责链对象可以当做一般职责对象使用
+
+type Manager interface {
+	HaveRight(money int) bool
+	HandleFeeRequest(name string, money int) bool
+}
+
+//
+type RequestChain struct {
+	Manager
+	successor *RequestChain
+}
+
+//connected r Chain with m Chain
+func (r *RequestChain) SetSuccessor(m *RequestChain) {
+	r.successor = m
+}
+
+func (r *RequestChain) HandleFeeRequest(name string, money int) bool {
+	if r.Manager.HaveRight(money) {
+		return r.Manager.HandleFeeRequest(name, money)
+	}
+	if r.successor != nil {
+		return r.successor.HandleFeeRequest(name, money)
+	}
+	return false
+}
+
+func (r *RequestChain) HaveRight(money int) bool {
+	return true
+}
+
+//new chain by projectManager
+//职责：ProjectManager
+func NewProjectManagerChain() *RequestChain {
+	return &RequestChain{
+		Manager: &ProjectManager{},
+	}
+}
+
+type ProjectManager struct {
+}
+
+func (p *ProjectManager) HaveRight(money int) bool {
+	return money < 50
+}
+
+func (p *ProjectManager) HandleFeeRequest(name string, money int) bool {
+	if name == "bob" {
+		fmt.Printf("Project manager permit %s %d fee request\n", name, money)
+		return true
+	}
+	fmt.Printf("Project manager do not permit %s fee request\n", name, money)
+	return false
+}
+
+//new chain by DepManager
+//职责：DepManager
+func NewDepManagerChain() *RequestChain {
+	return &RequestChain{
+		Manager: &DepManager{},
+	}
+}
+
+type DepManager struct {
+}
+
+func (d *DepManager) HaveRight(money int) bool {
+	return money < 5000
+}
+
+func (d *DepManager) HandleFeeRequest(name string, money int) bool {
+	if name == "bob" {
+		fmt.Printf("dep manager permit %s %d fee request\n", name, money)
+		return true
+	}
+	fmt.Printf("dep manager do not permit %s fee request\n", name, money)
+	return false
+}
+
+//new chain by GeneralManager
+//职责：GeneralManager
+func NewGeneralManagerChain() *RequestChain {
+	return &RequestChain{
+		Manager: &GeneralManager{},
+	}
+}
+
+type GeneralManager struct {
+}
+
+func (g *GeneralManager) HaveRight(money int) bool {
+	return true
+}
+
+func (g *GeneralManager) HandleFeeRequest(name string, money int) bool {
+	if name == "bob" {
+		fmt.Printf("general manager permit %s %d fee request\n", name, money)
+		return true
+	}
+	fmt.Printf("general manager do not permit %s fee request\n", name, money)
+	return false
+}

Go/DesignPattern/chain/chain_test.go

@@ -0,0 +1,28 @@
+/**
+* @Author:zhoutao
+* @Date:2020/12/13 上午9:50
+* @Desc:
+ */
+
+package chain
+
+func ExampleChain() {
+
+	//创建好每个节点的Manager
+	chain1 := NewProjectManagerChain()
+	chain2 := NewDepManagerChain()
+	chain3 := NewGeneralManagerChain()
+
+	//connected r Chain with m Chain
+	chain1.SetSuccessor(chain2)
+	chain2.SetSuccessor(chain3)
+
+	var c Manager = chain1
+
+	c.HandleFeeRequest("bob", 400)    //Project
+	c.HandleFeeRequest("tom", 1400)   //Dep
+	c.HandleFeeRequest("fool", 10000) //General
+	//
+	c.HandleFeeRequest("tony", 300) //Project
+
+}