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Infusers api core

There is a newer version: 2024.12.0008

package com.infusers.core.stats.users;

import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import com.infusers.core.logger.ILogger;

@Service
@EnableScheduling
public class ActiveUserService {
    private ILogger log = new ILogger(ActiveUserService.class);
    private static final String CLASS_NAME = "ActiveUserService";
    
    @Autowired
    private ApplicationEventPublisher eventPublisher;
    private final Map activeUsers = new ConcurrentHashMap<>();

    // Method to update the user's activity timestamp
    public void updateUserActivity(String userName) {
        log.debug(CLASS_NAME + ".updateUserActivity()--> userName = " + userName);    	
        activeUsers.put(userName, Instant.now());
        publishActiveUsersCount();        
    }
    
	public void logout(String userName) {		
		activeUsers.remove(userName);
        publishActiveUsersCount();		
	}    

    // Scheduled task to clean up inactive users
    @Scheduled(fixedRate = 60000) // Runs every 60 seconds
    public void cleanupInactiveUsers() {
        log.debug(CLASS_NAME + ".cleanupInactiveUsers()--> Started : "+activeUsers.size());    	    	
        Instant now = Instant.now();
        activeUsers.entrySet().removeIf(entry -> 
            ChronoUnit.MINUTES.between(entry.getValue(), now) > 15 // 15 minutes of inactivity
        );
        log.debug(CLASS_NAME + ".cleanupInactiveUsers()--> Ended : "+activeUsers.size());
        publishActiveUsersCount();
    }

    // Method to get the number of active users
    public int getActiveUserCount() {
        return activeUsers.size();
    }
    
    private void publishActiveUsersCount() {
        long count = getActiveUserCount();
        log.debug(CLASS_NAME + ".publishActiveUsersCount()--> count = " + count);
        
        eventPublisher.publishEvent(new ActiveUserCountEvent(this, count));        
    }    
}