/*
* Computoser is a music-composition algorithm and a website to present the results
* Copyright (C) 2012-2014 Bozhidar Bozhanov
*
* Computoser is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* Computoser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Computoser. If not, see <http://www.gnu.org/licenses/>.
*/
package com.music.scheduled;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import javax.annotation.PostConstruct;
import javax.inject.Inject;
import org.apache.commons.lang3.SerializationUtils;
import org.apache.commons.lang3.StringUtils;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
import com.google.common.collect.Maps;
import com.music.dao.PageableOperation;
import com.music.dao.PieceDao;
import com.music.dao.UserDao;
import com.music.model.persistent.Piece;
import com.music.model.persistent.User;
import com.music.service.EmailService;
import com.music.service.EmailService.EmailDetails;
import com.music.util.SecurityUtils;
@Component
public class PieceDigestSendingJob {
private static final Logger logger = LoggerFactory.getLogger(PieceDigestSendingJob.class);
@Inject
private PieceDao pieceDao;
@Inject
private UserDao userDao;
@Inject
private EmailService emailService;
@Value("${information.email.sender}")
private String from;
@Value("${hmac.key}")
private String hmacKey;
@PostConstruct
public void init() {
logger.info("Digest job initialized");
}
@Scheduled(cron="0 0 9 ? * 1,4")
@Transactional(readOnly=true)
public void sendPieceDigestEmails() {
logger.info("Sending email digests started");
DateTime now = new DateTime();
DateTime minusTwoDays = now.minusDays(2);
List<Piece> pieces = pieceDao.getPiecesInRange(minusTwoDays, now);
Collections.shuffle(pieces);
final List<Piece> includedPieces = new ArrayList<>(pieces.subList(0, Math.min(pieces.size(), 3)));
if (includedPieces.isEmpty()) {
return;
}
// for now - using the same data for all users. TODO send personalized selection
final EmailDetails baseDetails = new EmailDetails();
baseDetails.setMessageTemplate("digest.vm");
baseDetails.setSubject("Computoser-generated tracks digest for you");
Map<String, Object> model = Maps.newHashMap();
baseDetails.setMessageTemplateModel(model);
baseDetails.setFrom(from);
baseDetails.setHtml(true);
userDao.performBatched(User.class, 100, new PageableOperation<User>() {
@Override
public void execute() {
for (User user : getData()) {
if (user.isReceiveDailyDigest() && StringUtils.isNotBlank(user.getEmail())) {
EmailDetails email = SerializationUtils.clone(baseDetails);
email.setTo(user.getEmail());
email.setCurrentUser(user);
String hmac = SecurityUtils.hmac(user.getEmail(), hmacKey);
email.getMessageTemplateModel().put("pieces", includedPieces);
email.getMessageTemplateModel().put("hmac", hmac);
// needed due to SES restrictions
try {
Thread.sleep(500);
} catch (InterruptedException e) {
throw new IllegalStateException(e);
}
emailService.send(email);
}
}
}
});
}
@Transactional(readOnly=true)
@Async
public void sendEmails() {
try {
sendPieceDigestEmails();
} catch (Exception ex) {
logger.warn("Problem sending emails", ex);
}
}
}