Java tutorial
/* * eGov SmartCity eGovernance suite aims to improve the internal efficiency,transparency, * accountability and the service delivery of the government organizations. * * Copyright (C) 2018 eGovernments Foundation * * The updated version of eGov suite of products as by eGovernments Foundation * is available at http://www.egovernments.org * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see http://www.gnu.org/licenses/ or * http://www.gnu.org/licenses/gpl.html . * * In addition to the terms of the GPL license to be adhered to in using this * program, the following additional terms are to be complied with: * * 1) All versions of this program, verbatim or modified must carry this * Legal Notice. * Further, all user interfaces, including but not limited to citizen facing interfaces, * Urban Local Bodies interfaces, dashboards, mobile applications, of the program and any * derived works should carry eGovernments Foundation logo on the top right corner. * * For the logo, please refer http://egovernments.org/html/logo/egov_logo.png. * For any further queries on attribution, including queries on brand guidelines, * please contact contact@egovernments.org * * 2) Any misrepresentation of the origin of the material is prohibited. It * is required that all modified versions of this material be marked in * reasonable ways as different from the original version. * * 3) This license does not grant any rights to any user of the program * with regards to rights under trademark law for use of the trade names * or trademarks of eGovernments Foundation. * * In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org. * */ package org.egov.eventnotification.service; import org.egov.eventnotification.entity.Schedule; import org.egov.eventnotification.entity.contracts.EventNotificationProperties; import org.egov.infra.config.core.ApplicationThreadLocals; import org.egov.infra.exception.ApplicationRuntimeException; import org.joda.time.DateTime; import org.quartz.CronScheduleBuilder; import org.quartz.JobKey; import org.quartz.Scheduler; import org.quartz.SchedulerException; import org.quartz.SimpleTrigger; import org.quartz.Trigger; import org.quartz.TriggerBuilder; import org.quartz.TriggerKey; import org.quartz.impl.JobDetailImpl; import org.quartz.impl.triggers.SimpleTriggerImpl; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.ApplicationContext; import org.springframework.stereotype.Service; import java.util.Date; import static org.apache.commons.lang.StringUtils.ordinalIndexOf; import static org.egov.eventnotification.utils.Constants.BEANNOTIFSCH; import static org.egov.eventnotification.utils.Constants.DAY_CRON; import static org.egov.eventnotification.utils.Constants.EVENT_NOTIFICATION_GROUP; import static org.egov.eventnotification.utils.Constants.HOURS_CRON; import static org.egov.eventnotification.utils.Constants.MINUTES_CRON; import static org.egov.eventnotification.utils.Constants.MONTH_CRON; import static org.egov.eventnotification.utils.Constants.TRIGGER; @Service public class ScheduleDetailsService { private static final Logger LOGGER = LoggerFactory.getLogger(ScheduleDetailsService.class); @Autowired private ApplicationContext beanProvider; @Autowired private EventNotificationProperties appProperties; /** * This method is used to create a new job based on the newly created schedule. * * @param schedule * @param fullURL */ public void executeScheduler(Schedule schedule, String fullURL) { String cronExpression = getCronExpression(schedule); final JobDetailImpl jobDetail = (JobDetailImpl) beanProvider.getBean("eventNotificationJobDetail"); final Scheduler scheduler = (Scheduler) beanProvider.getBean(BEANNOTIFSCH); try { jobDetail.setName(ApplicationThreadLocals.getTenantID().concat("_") .concat("eventNotificationJob".concat(String.valueOf(schedule.getId())))); jobDetail.getJobDataMap().put("scheduleId", String.valueOf(schedule.getId())); jobDetail.getJobDataMap().put("contextURL", fullURL.substring(0, ordinalIndexOf(fullURL, "/", 3))); if (cronExpression == null) { final SimpleTriggerImpl trigger = new SimpleTriggerImpl(); trigger.setName(ApplicationThreadLocals.getTenantID().concat("_") .concat(TRIGGER.concat(String.valueOf(schedule.getId())))); trigger.setStartTime(new Date(System.currentTimeMillis() + 100000)); trigger.setMisfireInstruction(SimpleTrigger.MISFIRE_INSTRUCTION_FIRE_NOW); scheduler.start(); scheduler.scheduleJob(jobDetail, trigger); } else { final Trigger trigger = TriggerBuilder.newTrigger() .withIdentity(ApplicationThreadLocals.getTenantID().concat("_") .concat(TRIGGER.concat(String.valueOf(schedule.getId()))), EVENT_NOTIFICATION_GROUP) .withSchedule(CronScheduleBuilder.cronSchedule(cronExpression)).build(); scheduler.start(); scheduler.scheduleJob(jobDetail, trigger); } } catch (final SchedulerException e) { LOGGER.error("Error : Encountered an exception while scheduling", e); throw new ApplicationRuntimeException(e.getMessage(), e); } } /** * This method take a existing scheduler and remove it from schedule. * * @param schedule */ public void removeScheduler(Schedule schedule) { final Scheduler scheduler = (Scheduler) beanProvider.getBean(BEANNOTIFSCH); try { scheduler.unscheduleJob(new TriggerKey(ApplicationThreadLocals.getTenantID().concat("_") .concat(TRIGGER.concat(String.valueOf(schedule.getId()))), EVENT_NOTIFICATION_GROUP)); scheduler.deleteJob(new JobKey("eventNotificationJob".concat(String.valueOf(schedule.getId())))); } catch (final SchedulerException e) { LOGGER.error("Error : Encountered an exception while deleting a schedule job", e); throw new ApplicationRuntimeException(e.getMessage(), e); } } /** * This method modify the existing scheduler. It's basically modifying the schedule time using the rescheduleJob method. * * @param schedule */ public void modifyScheduler(Schedule schedule) { String cronExpression = getCronExpression(schedule); final Scheduler scheduler = (Scheduler) beanProvider.getBean(BEANNOTIFSCH); try { if (cronExpression == null) { TriggerKey triggerKey = new TriggerKey(ApplicationThreadLocals.getTenantID().concat("_") .concat(TRIGGER.concat(String.valueOf(schedule.getId()))), EVENT_NOTIFICATION_GROUP); final SimpleTriggerImpl trigger = new SimpleTriggerImpl(); trigger.setName(TRIGGER.concat(String.valueOf(schedule.getId()))); trigger.setStartTime(new Date(System.currentTimeMillis() + 100000)); trigger.setMisfireInstruction(SimpleTrigger.MISFIRE_INSTRUCTION_FIRE_NOW); scheduler.rescheduleJob(triggerKey, trigger); if (!scheduler.isShutdown()) scheduler.start(); } else { TriggerKey triggerKey = new TriggerKey(ApplicationThreadLocals.getTenantID().concat("_") .concat(TRIGGER.concat(String.valueOf(schedule.getId()))), EVENT_NOTIFICATION_GROUP); final Trigger trigger = TriggerBuilder.newTrigger() .withIdentity(TRIGGER.concat(String.valueOf(schedule.getId())), EVENT_NOTIFICATION_GROUP) .withSchedule(CronScheduleBuilder.cronSchedule(cronExpression)).build(); scheduler.rescheduleJob(triggerKey, trigger); if (!scheduler.isShutdown()) scheduler.start(); } } catch (final SchedulerException e) { LOGGER.error("Error : Encountered an exception while update schedule", e); throw new ApplicationRuntimeException(e.getMessage(), e); } } /** * This method take a cron expression from properties file and replace the hour,minute,day and month into the placeholder to * make dynamic cron expression. * * @param notificationschedule * @return */ private String getCronExpression(Schedule notificationschedule) { String cronExpression = null; DateTime calendar = new DateTime(notificationschedule.getStartDate()); int hours = calendar.getHourOfDay(); int minutes = calendar.getMinuteOfHour(); switch (notificationschedule.getScheduleRepeat().getName().toLowerCase()) { case "day": cronExpression = appProperties.getDailyCron().replace(MINUTES_CRON, String.valueOf(minutes)); cronExpression = cronExpression.replace(HOURS_CRON, String.valueOf(hours)); break; case "month": cronExpression = appProperties.getMonthlyCron().replace(MINUTES_CRON, String.valueOf(minutes)); cronExpression = cronExpression.replace(HOURS_CRON, String.valueOf(hours)); cronExpression = cronExpression.replace(DAY_CRON, String.valueOf(calendar.getDayOfMonth())); break; case "year": cronExpression = appProperties.getYearlyCron().replace(MINUTES_CRON, String.valueOf(minutes)); cronExpression = cronExpression.replace(HOURS_CRON, String.valueOf(hours)); cronExpression = cronExpression.replace(DAY_CRON, String.valueOf(calendar.getDayOfMonth())); cronExpression = cronExpression.replace(MONTH_CRON, String.valueOf(calendar.getMonthOfYear())); break; default: break; } return cronExpression; } }