《Spring实战》摘录 - 29

package spittr;
import java.util.regex.Matcher;
import java.util.regex.Patter;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Service;
@Service
public class SpittleFeedServiceImpl implements SpittleFeedService{
    private SimpMessagingTemplate messaging;
    private Pattern pattern = Pattern,compile(“\\@(\\S+)");//实现用户提及功能的正则表达式
    @Autoired
    public SpittleFeedServiceImpl(SimpMessagingTemplate messaging){
        this.messaging = messaging;
    }
    
    public void broadcastSpittle(Spittle spittle){
        messaging.convertAndSend(“/topic/spittlefeed”, spittle);
    
        Matccher matcher = pattern.matcher(spittle.getMessage());
        if(matcher.find()){
            String username = matcher.group(1);
            messaging.convertAndSendToUser(//发送提醒给用户
                username, “/queue/notifications”,
                new Notification(“You just got metioned!”);
            );
        }
    }
}

public void sendSimpleSpilleEmail(String to, Spittle spittle){
    SimpleMailMessage message = new SimpleMailMessage();//构造消息
    String spitterName = spittle.getSpitter().getFullName();
    message.setFrom(“noreply@spitter.com”);//Email地址
    message.setTo(to);
    message.setSubject("New spittle from” + spittlerName);
    message.setText(spitterName + “ says: “ + spittle.getText());//设置消息文本
    
    mailSender.send(message);//发送Email
}