org.apache.aurora.scheduler.cron.quartz.CronSchedulerImpl.java Source code

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Here is the source code for org.apache.aurora.scheduler.cron.quartz.CronSchedulerImpl.java

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/**
 * 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 org.apache.aurora.scheduler.cron.quartz;

import javax.inject.Inject;

import com.google.common.base.Optional;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.Iterables;

import org.apache.aurora.scheduler.base.JobKeys;
import org.apache.aurora.scheduler.cron.CronScheduler;
import org.apache.aurora.scheduler.cron.CrontabEntry;
import org.apache.aurora.scheduler.storage.entities.IJobKey;
import org.quartz.CronTrigger;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static java.util.Objects.requireNonNull;

import static org.apache.aurora.scheduler.cron.quartz.Quartz.jobKey;

class CronSchedulerImpl implements CronScheduler {
    private static final Logger LOG = LoggerFactory.getLogger(CronSchedulerImpl.class);

    private final Scheduler scheduler;

    @Inject
    CronSchedulerImpl(Scheduler scheduler) {
        this.scheduler = requireNonNull(scheduler);
    }

    @Override
    public Optional<CrontabEntry> getSchedule(IJobKey jobKey) throws IllegalStateException {
        requireNonNull(jobKey);

        try {
            return Optional
                    .of(Iterables.getOnlyElement(FluentIterable.from(scheduler.getTriggersOfJob(jobKey(jobKey)))
                            .filter(CronTrigger.class).transform(Quartz::crontabEntry)));
        } catch (SchedulerException e) {
            LOG.error("Error reading job " + JobKeys.canonicalString(jobKey) + " cronExpression Quartz: " + e, e);
            return Optional.absent();
        }
    }
}