com.athina.queue.manager.entity.JobQueueManager.java Source code

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Here is the source code for com.athina.queue.manager.entity.JobQueueManager.java

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/*
 * Copyright (C) 2015
 *
 * Licensed 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 com.athina.queue.manager.entity;

import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableSet;

import org.quartz.JobDetail;
import org.quartz.ObjectAlreadyExistsException;
import org.quartz.SchedulerException;
import org.quartz.impl.matchers.GroupMatcher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;

import javax.validation.Valid;

@Service
public class JobQueueManager {

    private static final Logger LOG = LoggerFactory.getLogger(JobQueueManager.class);

    private final org.quartz.Scheduler quartzScheduler;

    @Autowired
    public JobQueueManager(org.quartz.Scheduler quartzScheduler) {
        this.quartzScheduler = quartzScheduler;
    }

    public void scheduleJob(@Valid Job job) throws DuplicateJobKeyException {
        Set<org.quartz.Trigger> quartzTriggers = job.buildQuartzTriggers();
        JobDetail quartzJobDetail = job.buildQuartzJobDetail();
        try {
            quartzScheduler.scheduleJob(quartzJobDetail, quartzTriggers, false);
            LOG.info("Scheduled: {}", job);
        } catch (ObjectAlreadyExistsException e) {
            throw new DuplicateJobKeyException(job.getGroup(), job.getName(), e);
        } catch (SchedulerException e) {
            throw Throwables.propagate(e);
        }
    }

    public static class DuplicateJobKeyException extends Exception {

        /**
        * 
        */
        private static final long serialVersionUID = 1L;

        public DuplicateJobKeyException(String group, String name, ObjectAlreadyExistsException e) {
            super("already exists a job in group '" + group + "' with name '" + name + "'.", e);
        }
    }

    public Set<JobKey> getJobKeys() {
        try {
            return quartzScheduler.getJobKeys(GroupMatcher.anyJobGroup()).stream().map(JobKey::fromQuartzJobKey)
                    .collect(Collectors.toSet());
        } catch (SchedulerException e) {
            throw Throwables.propagate(e);
        }
    }

    public Set<JobKey> getJobKeysByGroup(String group) {
        try {
            return quartzScheduler.getJobKeys(GroupMatcher.jobGroupEquals(group)).stream()
                    .map(JobKey::fromQuartzJobKey).collect(Collectors.toSet());
        } catch (SchedulerException e) {
            throw Throwables.propagate(e);
        }
    }

    public Optional<Job> getJob(JobKey jobKey) {
        try {
            JobDetail jobDetail = quartzScheduler.getJobDetail(jobKey.buildQuartzJobKey());

            if (jobDetail == null) {
                return Optional.empty();
            }

            Set<org.quartz.Trigger> quartzTriggers = ImmutableSet
                    .copyOf(quartzScheduler.getTriggersOfJob(jobDetail.getKey()));
            return Optional.of(Job.fromQuartzJobDetailAndTriggers(jobDetail, quartzTriggers));
        } catch (SchedulerException e) {
            throw Throwables.propagate(e);
        }
    }

    public boolean deleteJob(JobKey jobKey) {
        try {
            return quartzScheduler.deleteJob(jobKey.buildQuartzJobKey());
        } catch (SchedulerException e) {
            throw Throwables.propagate(e);
        }
    }

}