Java tutorial
/* * The MIT License * * Copyright 2015 RBC1B. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package uk.org.rbc1b.roms.scheduled; import freemarker.template.TemplateException; import java.io.IOException; import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.security.authentication.UsernamePasswordAuthenticationToken; import org.springframework.security.core.Authentication; import org.springframework.security.core.context.SecurityContextHolder; import org.springframework.security.core.userdetails.UserDetails; import org.springframework.security.core.userdetails.UserDetailsService; import org.springframework.stereotype.Component; import uk.org.rbc1b.roms.controller.volunteer.ldc.SubmitLDCFormVolunteerEmailGenerator; import uk.org.rbc1b.roms.db.email.Email; import uk.org.rbc1b.roms.db.email.EmailDao; import uk.org.rbc1b.roms.db.volunteer.Volunteer; import uk.org.rbc1b.roms.db.volunteer.VolunteerDao; import uk.org.rbc1b.roms.db.volunteer.VolunteerSearchCriteria; /** * Scheduled service to inform volunteers, via email, that they should * submit a new LDC form if their volunteer form is older than 2 and a half * years. * * @author rahulsingh */ @Component public class SubmitVolunteerLDCFormService { private static final Logger LOGGER = LoggerFactory.getLogger(SubmitVolunteerLDCFormService.class); private static final Integer MAX_RECIPIENTS = 5; @Autowired private VolunteerDao volunteerDao; @Autowired private EmailDao emailDao; @Autowired private UserDetailsService userDetailsService; @Autowired private SubmitLDCFormVolunteerEmailGenerator submitLDCFormVolunteerEmailGenerator; /** * Queue the volunteers every ten minutes for the email. */ @Scheduled(cron = "0 0/10 * * * ?") public void queueVolunteersForLDCFormEmail() { UserDetails system = userDetailsService.loadUserByUsername("System"); Authentication authentication = new UsernamePasswordAuthenticationToken(system, system.getUsername(), system.getAuthorities()); SecurityContextHolder.getContext().setAuthentication(authentication); VolunteerSearchCriteria searchCriteria = new VolunteerSearchCriteria(); searchCriteria.setMaxResults(MAX_RECIPIENTS); List<Volunteer> volunteersForEmail = volunteerDao.findVolunteersWhoNeedToSubmitLDCForm(searchCriteria); for (Volunteer volunteer : volunteersForEmail) { try { Email email = submitLDCFormVolunteerEmailGenerator.generateEmailForVolunteers(volunteer); LOGGER.info("Volunteer: " + volunteer.getPersonId()); if (email != null) { emailDao.save(email); } // update the ldc email sent flag for the volunteer volunteer.setSubmitNewLDCFormEmailSent(true); volunteerDao.updateVolunteer(volunteer); } catch (IOException | TemplateException ex) { LOGGER.error("Failed to send the volunteer submit LDC form email: ", ex); } } } }