# DefaultTaskTriggerFactory.java

    /*
     *  Licensed to the Apache Software Foundation (ASF) under one
     *  or more contributor license agreements.  See the NOTICE file
     *  distributed with this work for additional information
     *  regarding copyright ownership.  The ASF licenses this file
     *  to you under the Apache License, Version 2.0 (the
     *  "License"); you may not use this file except in compliance
     *  with the License.  You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     *  Unless required by applicable law or agreed to in writing,
     *  software distributed under the License is distributed on an
     *   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     *  KIND, either express or implied.  See the License for the
     *  specific language governing permissions and limitations
     *  under the License.
     */
    package org.apache.synapse.task;

    import org.apache.commons.logging.Log;
    import org.apache.commons.logging.LogFactory;
    import org.quartz.CronScheduleBuilder;
    import org.quartz.Trigger;
    import org.quartz.TriggerBuilder;

    import java.util.Date;
    import java.util.Random;

    import static org.quartz.SimpleScheduleBuilder.simpleSchedule;
    import static org.quartz.TriggerBuilder.newTrigger;

    /**
     * Default TriggerFactory ship with synapse utils
     */
    public class DefaultTaskTriggerFactory implements TaskTriggerFactory {

        private static final Log log = LogFactory.getLog(DefaultTaskTriggerFactory.class);

        private final static Random RANDOM = new Random();

        /**
         * @see TaskTriggerFactory
         */
        public Trigger createTrigger(TaskDescription taskDescription) {

            String name = taskDescription.getName();
            if (name == null || "".equals(name)) {
                throw new SynapseTaskException("Name of the Task cannot be null", log);
            }

            String cron = taskDescription.getCronExpression();
            int repeatCount = taskDescription.getCount();
            long repeatInterval = taskDescription.getInterval();
            if (!taskDescription.getIntervalInMs()) {
                repeatInterval = repeatInterval * 1000;
            }

            Date startTime = null;
            if (taskDescription.getStartTime() != null) {
                startTime = taskDescription.getStartTime().getTime();
            }
            Date endTime = null;
            if (taskDescription.getEndTime() != null) {
                endTime = taskDescription.getEndTime().getTime();
            }
            String group = taskDescription.getTaskGroup();

            if (group == null || "".equals(group)) {
                group = TaskDescription.DEFAULT_GROUP;
            }

            Trigger trigger;

            TriggerBuilder<Trigger> triggerBuilder = newTrigger()
                    .withIdentity(name + "-trigger-" + String.valueOf(RANDOM.nextLong()), group);

            if (startTime != null) {
                triggerBuilder.startAt(startTime);
            } else {
                triggerBuilder.startNow();
            }

            if (endTime != null) {
                triggerBuilder.endAt(endTime);
            }

            if (cron == null || "".equals(cron)) {
                if (repeatCount >= 0) {
                    trigger = triggerBuilder.withSchedule(simpleSchedule()
                    .withIntervalInMilliseconds(repeatInterval)
                    .withRepeatCount(repeatCount - 1))
                    .build();
                } else {
                    trigger = triggerBuilder.withSchedule(simpleSchedule()
                    .withIntervalInMilliseconds(repeatInterval)
                    .repeatForever())
                    .build();
                }

            } else {
                trigger = triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron)).build();
            }

            if (trigger == null) {
                throw new SynapseTaskException("Trigger is null for the Task description : " +
                        taskDescription, log);
            }

            return trigger;
        }
    }