ThreadAgent.java

package org.kalipo.agent;

import org.joda.time.DateTime;
import org.kalipo.aop.KalipoExceptionHandler;
import org.kalipo.domain.Thread;
import org.kalipo.repository.CommentRepository;
import org.kalipo.repository.ThreadRepository;
import org.kalipo.repository.VoteRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import javax.inject.Inject;
import java.util.List;

/**
 * Scheduled jobs for Thread entity
 * Created by damoeb on 13.07.15.
 */
@Service
@KalipoExceptionHandler
public class ThreadAgent {

    private final Logger log = LoggerFactory.getLogger(ThreadAgent.class);

    @Inject
    private ThreadRepository threadRepository;

    @Inject
    private VoteRepository voteRepository;

    @Inject
    private CommentRepository commentRepository;

    @Scheduled(fixedDelay = 20000)
    public void updateThreadStats() {

        Sort sort = new Sort(Sort.Direction.ASC, "lastModifiedDate");
        PageRequest pageable = new PageRequest(0, 10, sort);

        List<Thread> threads = threadRepository.findByStatus(Thread.Status.OPEN, pageable);
        for (Thread thread : threads) {
            log.debug("Updating stats of thread {}", thread.getId());

            Integer likes = voteRepository.countLikesInThread(thread.getId());
            thread.setLikes(likes);
            int commentCount = commentRepository.countApprovedInThread(thread.getId());
            thread.setCommentCount(commentCount);
            thread.setPendingCount(commentRepository.countPendingInThread(thread.getId()));
            thread.setLastModifiedDate(DateTime.now());

//          todo unique authors, views

            double passedMinutes = (DateTime.now().toDate().getTime() - thread.getCreatedDate().toDate().getTime()) / 60000;

            double score = likes + commentCount == 0 || passedMinutes == 0 ? 0 : (likes + commentCount) / passedMinutes;
            thread.setScore(score);

            threadRepository.save(thread);
        }
    }
}