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package pb
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import (
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"context"
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"go.dtapp.net/library/utils/gojobs/pubsub"
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"log"
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"strings"
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"time"
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)
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type PubSubServerService struct {
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pub *pubsub.Publisher
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UnimplementedPubSubServer
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}
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func NewPubSubServerService() *PubSubServerService {
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return &PubSubServerService{
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// 新建一个Publisher对象
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pub: pubsub.NewPublisher(time.Millisecond*100, 10),
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}
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}
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// Publish 实现发布方法
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func (p *PubSubServerService) Publish(ctx context.Context, req *PublishRequest) (*PublishResponse, error) {
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log.Printf("[服务中转]{发布}编号：%s 类型：%s ip地址：%s\n", req.GetId(), req.GetValue(), req.GetIp())
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// 发布消息
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p.pub.Publish(req.GetValue())
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return &PublishResponse{
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Id: req.GetId(),
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Value: req.GetValue(),
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Ip: req.GetIp(),
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}, nil
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}
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// Subscribe 实现订阅方法
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func (p *PubSubServerService) Subscribe(req *SubscribeRequest, stream PubSub_SubscribeServer) error {
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// SubscribeTopic 增加一个使用函数过滤器的订阅者
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// func(v interface{}) 定义函数过滤的规则
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// SubscribeTopic 返回一个chan interface{}
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ch := p.pub.SubscribeTopic(func(v interface{}) bool {
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log.Printf("[服务中转]{订阅}主题：%v\n", v)
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// 接收数据是string，并且key是以arg为前缀的
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if key, ok := v.(string); ok {
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if strings.HasPrefix(key, req.GetValue()) {
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return true
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}
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}
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return false
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})
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log.Printf("[服务中转]{订阅}编号：%s 类型：%s 方法：%s ip地址：%s\n", req.GetId(), req.GetValue(), req.GetMethod(), req.GetIp())
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log.Println("[服务中转]{订阅}工作线：", ch)
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log.Println("[服务中转]{订阅}当前工作线数量：", p.pub.Len())
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// 服务器遍历chan，并将其中信息发送给订阅客户端
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for v := range ch {
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log.Println("[服务中转]{订阅}for ch：", ch)
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log.Println("[服务中转]{订阅}for v：", v)
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err := stream.Send(&SubscribeResponse{
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Id: req.GetId(),
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Value: req.GetValue(),
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Method: req.GetMethod(),
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})
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if err != nil {
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log.Println("[服务中转]{订阅}任务分配失败 ", err.Error())
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return err
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}
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}
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return nil
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}
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