98 lines
2.1 KiB
Go
98 lines
2.1 KiB
Go
package main
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import (
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"fmt"
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"slices"
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)
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/*
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实例：
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汤宝宝一时想不开，当了房产中介。
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他负责把房东和租客撮合在一起，帮他们达成租房协议。
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*/
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// 抽象中介者
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type Mediator interface {
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register(colleague Colleague)
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Notify(sender Colleague, event string)
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}
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// 具体中介者 - 房产中介
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type HousingMediator struct {
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colleagues []Colleague
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}
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func (m *HousingMediator) register(colleague Colleague) {
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if slices.Contains(m.colleagues, colleague) {
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return // 已注册
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}
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m.colleagues = append(m.colleagues, colleague)
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}
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func (m *HousingMediator) Notify(sender Colleague, event string) {
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for _, colleague := range m.colleagues {
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if colleague != sender {
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colleague.Receive(event)
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}
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}
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}
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// 抽象同事类
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type Colleague interface {
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Send(event string)
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Receive(event string)
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}
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// 具体同事类 - 房东
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type Landlord struct {
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mediator Mediator
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name string
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}
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func (l *Landlord) Send(event string) {
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fmt.Printf("房东%s发布信息: %s\n", l.name, event)
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l.mediator.Notify(l, event)
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}
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func (l *Landlord) Receive(event string) {
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fmt.Printf("房东%s收到通知: %s\n", l.name, event)
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}
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// 具体同事类 - 租客
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type Tenant struct {
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mediator Mediator
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name string
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}
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func (t *Tenant) Send(event string) {
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fmt.Printf("租客%s发布需求: %s\n", t.name, event)
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t.mediator.Notify(t, event)
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}
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func (t *Tenant) Receive(event string) {
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fmt.Printf("租客%s收到通知: %s\n", t.name, event)
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}
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func main() {
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fmt.Println("============= 中介者模式 =============")
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mediator := &HousingMediator{}
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landlord1 := &Landlord{mediator: mediator, name: "张三"}
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landlord2 := &Landlord{mediator: mediator, name: "李四"}
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tenant1 := &Tenant{mediator: mediator, name: "王五"}
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tenant2 := &Tenant{mediator: mediator, name: "赵六"}
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mediator.register(landlord1)
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mediator.register(landlord2)
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mediator.register(tenant1)
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mediator.register(tenant2)
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landlord1.Send("张三有一套两室一厅的房子出租，月租2000元。")
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fmt.Println("-----")
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tenant1.Send("王五需要一套三室的房子，预算3000元/月。")
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fmt.Println()
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fmt.Println("=========== 中介者模式结束 ===========")
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}
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